diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c
index 6932d52ab8..0b4b72faca 100644
--- a/libavcodec/4xm.c
+++ b/libavcodec/4xm.c
@@ -564,7 +564,7 @@ static int decode_i_frame(FourXContext *f, uint8_t *buf, int length){
     if(prestream_size + bitstream_size + 12 != length
        || bitstream_size > (1<<26)
        || prestream_size > (1<<26)){
-        av_log(f->avctx, AV_LOG_ERROR, "size missmatch %d %d %d\n", prestream_size, bitstream_size, length);
+        av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d %d\n", prestream_size, bitstream_size, length);
         return -1;
     }
    
@@ -591,7 +591,7 @@ static int decode_i_frame(FourXContext *f, uint8_t *buf, int length){
     }
 
     if(get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3) != 256)
-        av_log(f->avctx, AV_LOG_ERROR, "end missmatch\n");
+        av_log(f->avctx, AV_LOG_ERROR, "end mismatch\n");
     
     return 0;
 }
@@ -607,7 +607,7 @@ static int decode_frame(AVCodecContext *avctx,
 
     frame_4cc= get32(buf);
     if(buf_size != get32(buf+4)+8){
-        av_log(f->avctx, AV_LOG_ERROR, "size missmatch %d %d\n", buf_size, get32(buf+4));
+        av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d\n", buf_size, get32(buf+4));
     }
 
     if(frame_4cc == ff_get_fourcc("cfrm")){
@@ -643,7 +643,7 @@ static int decode_frame(AVCodecContext *avctx,
             frame_size= cfrm->size;
             
             if(id != avctx->frame_number){
-                av_log(f->avctx, AV_LOG_ERROR, "cframe id missmatch %d %d\n", id, avctx->frame_number);
+                av_log(f->avctx, AV_LOG_ERROR, "cframe id mismatch %d %d\n", id, avctx->frame_number);
             }
             
             cfrm->size= cfrm->id= 0;
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 7e301ac767..8e6b2c0738 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1691,14 +1691,14 @@ typedef struct AVCodecContext {
      int nsse_weight;
 
     /**
-     * number of macroblock rows at the top which are skiped.
+     * number of macroblock rows at the top which are skipped.
      * - encoding: unused
      * - decoding: set by user
      */
      int skip_top;
 
     /**
-     * number of macroblock rows at the bottom which are skiped.
+     * number of macroblock rows at the bottom which are skipped.
      * - encoding: unused
      * - decoding: set by user
      */
diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index b0d22ddf97..2bb2276cd1 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -346,7 +346,7 @@ static void guess_mv(MpegEncContext *s){
                 s->mv_dir = MV_DIR_FORWARD;
                 s->mb_intra=0;
                 s->mv_type = MV_TYPE_16X16;
-                s->mb_skiped=0;
+                s->mb_skipped=0;
 
 		s->dsp.clear_blocks(s->block[0]);
 
@@ -474,7 +474,7 @@ int score_sum=0;
                     s->mv_dir = MV_DIR_FORWARD;
                     s->mb_intra=0;
                     s->mv_type = MV_TYPE_16X16;
-                    s->mb_skiped=0;
+                    s->mb_skipped=0;
 
 		    s->dsp.clear_blocks(s->block[0]);
 
@@ -858,7 +858,7 @@ void ff_er_frame_end(MpegEncContext *s){
             
             s->mv_dir = MV_DIR_FORWARD;
             s->mb_intra=0;
-            s->mb_skiped=0;
+            s->mb_skipped=0;
             if(IS_8X8(mb_type)){
                 int mb_index= mb_x*2 + mb_y*2*s->b8_stride;
                 int j;
@@ -897,7 +897,7 @@ void ff_er_frame_end(MpegEncContext *s){
                 s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD;
                 s->mb_intra=0;
                 s->mv_type = MV_TYPE_16X16;
-                s->mb_skiped=0;
+                s->mb_skipped=0;
                 
                 if(s->pp_time){
                     int time_pp= s->pp_time;
diff --git a/libavcodec/faad.c b/libavcodec/faad.c
index eff051bd45..413b282140 100644
--- a/libavcodec/faad.c
+++ b/libavcodec/faad.c
@@ -158,7 +158,7 @@ static int faac_decode_frame(AVCodecContext *avctx,
     out = s->faacDecDecode(s->faac_handle, &frame_info, (unsigned char*)buf, (unsigned long)buf_size);
 
     if (frame_info.error > 0) {
-	av_log(avctx, AV_LOG_ERROR, "faac: frame decodinf failed: %s\n",
+	av_log(avctx, AV_LOG_ERROR, "faac: frame decoding failed: %s\n",
 		s->faacDecGetErrorMessage(frame_info.error));
         return 0;
     }
diff --git a/libavcodec/ffv1.c b/libavcodec/ffv1.c
index 6a4c6ed3ff..107eab1bcc 100644
--- a/libavcodec/ffv1.c
+++ b/libavcodec/ffv1.c
@@ -551,7 +551,7 @@ static int encode_init(AVCodecContext *avctx)
     int i;
 
     if(avctx->strict_std_compliance >= 0){
-        av_log(avctx, AV_LOG_ERROR, "this codec is under development, files encoded with it wont be decodeable with future versions!!!\n"
+        av_log(avctx, AV_LOG_ERROR, "this codec is under development, files encoded with it may not be decodeable with future versions!!!\n"
                "use vstrict=-1 / -strict -1 to use it anyway\n");
         return -1;
     }
diff --git a/libavcodec/flac.c b/libavcodec/flac.c
index 894da93848..17082e4328 100644
--- a/libavcodec/flac.c
+++ b/libavcodec/flac.c
@@ -556,7 +556,7 @@ static int decode_frame(FLACContext *s)
     skip_bits(&s->gb, 8);
     crc8= get_crc8(s->gb.buffer, get_bits_count(&s->gb)/8);
     if(crc8){
-        av_log(s->avctx, AV_LOG_ERROR, "header crc missmatch crc=%2X\n", crc8);
+        av_log(s->avctx, AV_LOG_ERROR, "header crc mismatch crc=%2X\n", crc8);
         return -1;
     }
     
diff --git a/libavcodec/h261.c b/libavcodec/h261.c
index aceebaa381..cc6d34fdc7 100644
--- a/libavcodec/h261.c
+++ b/libavcodec/h261.c
@@ -541,7 +541,7 @@ static int h261_decode_mb_skipped(H261Context *h, int mba1, int mba2 )
         s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
         s->mv[0][0][0] = 0;
         s->mv[0][0][1] = 0;
-        s->mb_skiped = 1;
+        s->mb_skipped = 1;
         h->mtype &= ~MB_TYPE_H261_FIL;
 
         MPV_decode_mb(s, s->block);
diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 81c3648f19..4cd2204b29 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -619,7 +619,7 @@ void ff_h263_update_motion_val(MpegEncContext * s){
     const int wrap = s->b8_stride;
     const int xy = s->block_index[0];
     
-    s->current_picture.mbskip_table[mb_xy]= s->mb_skiped; 
+    s->current_picture.mbskip_table[mb_xy]= s->mb_skipped; 
 
     if(s->mv_type != MV_TYPE_8X8){
         int motion_x, motion_y;
@@ -855,7 +855,7 @@ void mpeg4_encode_mb(MpegEncContext * s,
             assert((s->dquant&1)==0);
             assert(mb_type>=0);
 
-            /* nothing to do if this MB was skiped in the next P Frame */
+            /* nothing to do if this MB was skipped in the next P Frame */
             if(s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]){ //FIXME avoid DCT & ...
                 s->skip_count++;
                 s->mv[0][0][0]= 
@@ -864,7 +864,7 @@ void mpeg4_encode_mb(MpegEncContext * s,
                 s->mv[1][0][1]= 0;
                 s->mv_dir= MV_DIR_FORWARD; //doesnt matter
                 s->qscale -= s->dquant;
-//                s->mb_skiped=1;
+//                s->mb_skipped=1;
 
                 return;
             }
@@ -990,7 +990,7 @@ void mpeg4_encode_mb(MpegEncContext * s,
                     offset= x + y*s->linesize;
                     p_pic= s->new_picture.data[0] + offset;
                     
-                    s->mb_skiped=1;
+                    s->mb_skipped=1;
                     for(i=0; i<s->max_b_frames; i++){
                         uint8_t *b_pic;
                         int diff;
@@ -1001,14 +1001,14 @@ void mpeg4_encode_mb(MpegEncContext * s,
                         b_pic= pic->data[0] + offset + 16; //FIXME +16
 			diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
                         if(diff>s->qscale*70){ //FIXME check that 70 is optimal
-                            s->mb_skiped=0;
+                            s->mb_skipped=0;
                             break;
                         }
                     }
                 }else
-                    s->mb_skiped=1; 
+                    s->mb_skipped=1; 
 
-                if(s->mb_skiped==1){
+                if(s->mb_skipped==1){
                     /* skip macroblock */
                     put_bits(&s->pb, 1, 1);
 
@@ -3211,7 +3211,7 @@ static int mpeg4_decode_video_packet_header(MpegEncContext *s)
     }
     if(s->pict_type == B_TYPE){
         while(s->next_picture.mbskip_table[ s->mb_index2xy[ mb_num ] ]) mb_num++;
-        if(mb_num >= s->mb_num) return -1; // slice contains just skiped MBs which where allready decoded
+        if(mb_num >= s->mb_num) return -1; // slice contains just skipped MBs which where allready decoded
     }
     
     s->mb_x= mb_num % s->mb_width;
@@ -3729,10 +3729,10 @@ static int mpeg4_decode_partitioned_mb(MpegEncContext *s, DCTELEM block[6][64])
             s->mv_type = MV_TYPE_16X16;
             if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){
                 s->mcsel=1;
-                s->mb_skiped = 0;
+                s->mb_skipped = 0;
             }else{
                 s->mcsel=0;
-                s->mb_skiped = 1;
+                s->mb_skipped = 1;
             }
         }else if(s->mb_intra){
             s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
@@ -3910,7 +3910,7 @@ int ff_h263_decode_mb(MpegEncContext *s,
                 s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
                 s->mv[0][0][0] = 0;
                 s->mv[0][0][1] = 0;
-                s->mb_skiped = !(s->obmc | s->loop_filter);
+                s->mb_skipped = !(s->obmc | s->loop_filter);
                 goto end;
             }
             cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
@@ -4175,13 +4175,13 @@ int ff_mpeg4_decode_mb(MpegEncContext *s,
                     s->mv[0][0][0]= get_amv(s, 0);
                     s->mv[0][0][1]= get_amv(s, 1);
 
-                    s->mb_skiped = 0;
+                    s->mb_skipped = 0;
                 }else{
                     s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
                     s->mcsel=0;
                     s->mv[0][0][0] = 0;
                     s->mv[0][0][1] = 0;
-                    s->mb_skiped = 1;
+                    s->mb_skipped = 1;
                 }
                 goto end;
             }
@@ -4294,9 +4294,9 @@ int ff_mpeg4_decode_mb(MpegEncContext *s,
         }
 
         /* if we skipped it in the future P Frame than skip it now too */
-        s->mb_skiped= s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC
+        s->mb_skipped= s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC
 
-        if(s->mb_skiped){
+        if(s->mb_skipped){
                 /* skip mb */
             for(i=0;i<6;i++)
                 s->block_last_index[i] = -1;
@@ -5586,7 +5586,7 @@ static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){
         if (get_bits1(gb) == 1) {   /* not_8_bit */
             s->quant_precision = get_bits(gb, 4); /* quant_precision */
             if(get_bits(gb, 4)!=8) av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n"); /* bits_per_pixel */
-            if(s->quant_precision!=5) av_log(s->avctx, AV_LOG_ERROR, "quant precission %d\n", s->quant_precision);
+            if(s->quant_precision!=5) av_log(s->avctx, AV_LOG_ERROR, "quant precision %d\n", s->quant_precision);
         } else {
             s->quant_precision = 5;
         }
@@ -5778,7 +5778,7 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
 
     s->pict_type = get_bits(gb, 2) + I_TYPE;	/* pict type: I = 0 , P = 1 */
     if(s->pict_type==B_TYPE && s->low_delay && s->vol_control_parameters==0 && !(s->flags & CODEC_FLAG_LOW_DELAY)){
-        av_log(s->avctx, AV_LOG_ERROR, "low_delay flag set, but shouldnt, clearing it\n");
+        av_log(s->avctx, AV_LOG_ERROR, "low_delay flag incorrectly, clearing it\n");
         s->low_delay=0;
     }
  
@@ -5799,7 +5799,7 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
     check_marker(gb, "before time_increment");
     
     if(s->time_increment_bits==0){
-        av_log(s->avctx, AV_LOG_ERROR, "hmm, seems the headers arnt complete, trying to guess time_increment_bits\n");
+        av_log(s->avctx, AV_LOG_ERROR, "hmm, seems the headers are not complete, trying to guess time_increment_bits\n");
 
         for(s->time_increment_bits=1 ;s->time_increment_bits<16; s->time_increment_bits++){
             if(show_bits(gb, s->time_increment_bits+1)&1) break;
@@ -5830,8 +5830,8 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
         s->time= (s->last_time_base + time_incr)*s->time_increment_resolution + time_increment;
         s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
         if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
-//            printf("messed up order, seeking?, skiping current b frame\n");
-            return FRAME_SKIPED;
+//            printf("messed up order, maybe after seeking? skipping current b frame\n");
+            return FRAME_SKIPPED;
         }
         
         if(s->t_frame==0) s->t_frame= s->pb_time;
@@ -5853,7 +5853,7 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
     if (get_bits1(gb) != 1){
         if(s->avctx->debug&FF_DEBUG_PICT_INFO)
             av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n");
-        return FRAME_SKIPED;
+        return FRAME_SKIPPED;
     }
 //printf("time %d %d %d || %Ld %Ld %Ld\n", s->time_increment_bits, s->time_increment_resolution, s->time_base,
 //s->time, s->last_non_b_time, s->last_non_b_time - s->pp_time);  
@@ -6003,7 +6003,7 @@ int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb)
         if(get_bits_count(gb) >= gb->size_in_bits){
             if(gb->size_in_bits==8 && (s->divx_version || s->xvid_build)){
                 av_log(s->avctx, AV_LOG_ERROR, "frame skip %d\n", gb->size_in_bits);
-                return FRAME_SKIPED; //divx bug
+                return FRAME_SKIPPED; //divx bug
             }else
                 return -1; //end of stream
         }
@@ -6032,11 +6032,11 @@ int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb)
             else if(startcode==0x1BB) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start");
             else if(startcode==0x1BC) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start");
             else if(startcode==0x1BD) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start");
-            else if(startcode==0x1BE) av_log(s->avctx, AV_LOG_DEBUG, "Still Textutre Object start");
-            else if(startcode==0x1BF) av_log(s->avctx, AV_LOG_DEBUG, "Textutre Spatial Layer start");
-            else if(startcode==0x1C0) av_log(s->avctx, AV_LOG_DEBUG, "Textutre SNR Layer start");
-            else if(startcode==0x1C1) av_log(s->avctx, AV_LOG_DEBUG, "Textutre Tile start");
-            else if(startcode==0x1C2) av_log(s->avctx, AV_LOG_DEBUG, "Textutre Shape Layer start");
+            else if(startcode==0x1BE) av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start");
+            else if(startcode==0x1BF) av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start");
+            else if(startcode==0x1C0) av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start");
+            else if(startcode==0x1C1) av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start");
+            else if(startcode==0x1C2) av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start");
             else if(startcode==0x1C3) av_log(s->avctx, AV_LOG_DEBUG, "stuffing start");
             else if(startcode<=0x1C5) av_log(s->avctx, AV_LOG_DEBUG, "reserved");
             else if(startcode<=0x1FF) av_log(s->avctx, AV_LOG_DEBUG, "System start");
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index da2bd54a2c..6111f170a5 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -199,7 +199,7 @@ static int decode_slice(MpegEncContext *s){
             
             s->mv_dir = MV_DIR_FORWARD;
             s->mv_type = MV_TYPE_16X16;
-//            s->mb_skiped = 0;
+//            s->mb_skipped = 0;
 //printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
             ret= s->decode_mb(s, s->block);
 
@@ -451,7 +451,7 @@ uint64_t time= rdtsc();
         }else if(s->codec_id==CODEC_ID_H263){
             next= h263_find_frame_end(&s->parse_context, buf, buf_size);
         }else{
-            av_log(s->avctx, AV_LOG_ERROR, "this codec doesnt support truncated bitstreams\n");
+            av_log(s->avctx, AV_LOG_ERROR, "this codec does not support truncated bitstreams\n");
             return -1;
         }
         
@@ -503,7 +503,7 @@ retry:
         ret = h263_decode_picture_header(s);
     }
     
-    if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size);
+    if(ret==FRAME_SKIPPED) return get_consumed_bytes(s, buf_size);
 
     /* skip if the header was thrashed */
     if (ret < 0){
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index a44e7ce1a0..fd7f095315 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -162,7 +162,7 @@ typedef struct H264Context{
 
     int chroma_qp; //QPc
 
-    int prev_mb_skiped; //FIXME remove (IMHO not used)
+    int prev_mb_skipped; //FIXME remove (IMHO not used)
 
     //prediction stuff
     int chroma_pred_mode;
@@ -4205,7 +4205,7 @@ static void decode_mb_skip(H264Context *h){
     s->current_picture.mb_type[mb_xy]= mb_type|MB_TYPE_SKIP;
     s->current_picture.qscale_table[mb_xy]= s->qscale;
     h->slice_table[ mb_xy ]= h->slice_num;
-    h->prev_mb_skiped= 1;
+    h->prev_mb_skipped= 1;
 }
 
 /**
@@ -4232,12 +4232,12 @@ static int decode_mb_cavlc(H264Context *h){
         }
     }
     if(h->mb_aff_frame){
-        if ( ((s->mb_y&1) == 0) || h->prev_mb_skiped)
+        if ( ((s->mb_y&1) == 0) || h->prev_mb_skipped)
             h->mb_field_decoding_flag = get_bits1(&s->gb);
     }else
         h->mb_field_decoding_flag= (s->picture_structure!=PICT_FRAME);
     
-    h->prev_mb_skiped= 0;
+    h->prev_mb_skipped= 0;
     
     mb_type= get_ue_golomb(&s->gb);
     if(h->slice_type == B_TYPE){
@@ -5209,12 +5209,12 @@ static int decode_mb_cabac(H264Context *h) {
         }
     }
     if(h->mb_aff_frame){
-        if ( ((s->mb_y&1) == 0) || h->prev_mb_skiped)
+        if ( ((s->mb_y&1) == 0) || h->prev_mb_skipped)
             h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
     }else
         h->mb_field_decoding_flag= (s->picture_structure!=PICT_FRAME);
 
-    h->prev_mb_skiped = 0;
+    h->prev_mb_skipped = 0;
 
     compute_mb_neighboors(h);
     if( ( mb_type = decode_cabac_mb_type( h ) ) < 0 ) {
@@ -6628,7 +6628,7 @@ static inline int decode_seq_parameter_set(H264Context *h){
         sps->crop_top   = get_ue_golomb(&s->gb);
         sps->crop_bottom= get_ue_golomb(&s->gb);
         if(sps->crop_left || sps->crop_top){
-            av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completly supported, this could look slightly wrong ...\n");
+            av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
         }
     }else{
         sps->crop_left  = 
@@ -7022,7 +7022,7 @@ static int decode_frame(AVCodecContext *avctx,
 
     //FIXME do something with unavailable reference frames    
  
-//    if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_index, buf_size);
+//    if(ret==FRAME_SKIPPED) return get_consumed_bytes(s, buf_index, buf_size);
     if(!s->current_picture_ptr){
         av_log(h->s.avctx, AV_LOG_DEBUG, "error, NO frame\n");
         return -1;
diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c
index 5b496c512f..d2f3585754 100644
--- a/libavcodec/huffyuv.c
+++ b/libavcodec/huffyuv.c
@@ -542,7 +542,7 @@ static int encode_init(AVCodecContext *avctx)
         if(s->interlaced != ( s->height > 288 ))
             av_log(avctx, AV_LOG_INFO, "using huffyuv 2.2.0 or newer interlacing flag\n");
     }else if(avctx->strict_std_compliance>=0){
-        av_log(avctx, AV_LOG_ERROR, "This codec is under development; files encoded with it may not be decodeable with future versions!!! Set vstrict=-1 / -strict -1 to use it anyway.\n");
+        av_log(avctx, AV_LOG_ERROR, "This codec is under development; files encoded with it may not be decodable with future versions!!! Set vstrict=-1 / -strict -1 to use it anyway.\n");
         return -1;
     }
     
@@ -827,7 +827,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
             p->data[0][1]= get_bits(&s->gb, 8);
             p->data[0][0]= get_bits(&s->gb, 8);
             
-            av_log(avctx, AV_LOG_ERROR, "YUY2 output isnt implemenetd yet\n");
+            av_log(avctx, AV_LOG_ERROR, "YUY2 output is not implemented yet\n");
             return -1;
         }else{
         
@@ -996,14 +996,14 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
                         }
                     }
                 }
-                draw_slice(s, height); // just 1 large slice as this isnt possible in reverse order
+                draw_slice(s, height); // just 1 large slice as this is not possible in reverse order
                 break;
             default:
                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");
             }
         }else{
 
-            av_log(avctx, AV_LOG_ERROR, "BGR24 output isnt implemenetd yet\n");
+            av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");
             return -1;
         }
     }
diff --git a/libavcodec/lcl.c b/libavcodec/lcl.c
index a15a107699..b93f314489 100644
--- a/libavcodec/lcl.c
+++ b/libavcodec/lcl.c
@@ -714,7 +714,7 @@ static int decode_init(AVCodecContext *avctx)
                     break;
                 default:
                     if ((c->compression < Z_NO_COMPRESSION) || (c->compression > Z_BEST_COMPRESSION)) {
-                	    av_log(avctx, AV_LOG_ERROR, "Unusupported compression level for ZLIB: (%d).\n", c->compression);
+                	    av_log(avctx, AV_LOG_ERROR, "Unsupported compression level for ZLIB: (%d).\n", c->compression);
                         return 1;
                     }
                     av_log(avctx, AV_LOG_INFO, "Compression level for ZLIB: (%d).\n", c->compression);
diff --git a/libavcodec/motion_est.c b/libavcodec/motion_est.c
index 2cb6a34d35..8fbbdf5d22 100644
--- a/libavcodec/motion_est.c
+++ b/libavcodec/motion_est.c
@@ -1300,7 +1300,7 @@ void ff_estimate_p_frame_motion(MpegEncContext * s,
             c->sub_motion_search(s, &mx, &my, dmin, 0, 0, 0, 16);
             if(s->flags&CODEC_FLAG_MV0)
                 if(mx || my)
-                    mb_type |= CANDIDATE_MB_TYPE_SKIPED; //FIXME check difference
+                    mb_type |= CANDIDATE_MB_TYPE_SKIPPED; //FIXME check difference
         }else{
             mx <<=shift;
             my <<=shift;
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index fd75381718..b06fe51b87 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -226,10 +226,10 @@ static int encode_init(AVCodecContext *avctx)
 
     if(find_frame_rate_index(s) < 0){
         if(s->strict_std_compliance >=0){
-            av_log(avctx, AV_LOG_ERROR, "MPEG1/2 doesnt support %d/%d fps\n", avctx->frame_rate, avctx->frame_rate_base);
+            av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->frame_rate, avctx->frame_rate_base);
             return -1;
         }else{
-            av_log(avctx, AV_LOG_INFO, "MPEG1/2 doesnt support %d/%d fps, there may be AV sync issues\n", avctx->frame_rate, avctx->frame_rate_base);
+            av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->frame_rate, avctx->frame_rate_base);
         }
     }
     
@@ -1055,11 +1055,11 @@ static int mpeg_decode_mb(MpegEncContext *s,
 
     dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
 
-    assert(s->mb_skiped==0);
+    assert(s->mb_skipped==0);
 
     if (s->mb_skip_run-- != 0) {
         if(s->pict_type == I_TYPE){
-            av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
+            av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
             return -1;
         }
     
@@ -1078,7 +1078,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
             s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
             s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
             s->field_select[0][0]= s->picture_structure - 1;
-            s->mb_skiped = 1;
+            s->mb_skipped = 1;
             s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
         } else {
             int mb_type;
@@ -1101,7 +1101,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
 //            assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
 
             if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0) 
-                s->mb_skiped = 1;
+                s->mb_skipped = 1;
         }
 
         return 0;
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 45b92caef9..697430c1bd 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -409,7 +409,7 @@ static int alloc_picture(MpegEncContext *s, Picture *pic, int shared){
     memmove(s->prev_pict_types+1, s->prev_pict_types, PREV_PICT_TYPES_BUFFER_SIZE-1);
     s->prev_pict_types[0]= s->pict_type;
     if(pic->age < PREV_PICT_TYPES_BUFFER_SIZE && s->prev_pict_types[pic->age] == B_TYPE)
-        pic->age= INT_MAX; // skiped MBs in b frames are quite rare in mpeg1/2 and its a bit tricky to skip them anyway
+        pic->age= INT_MAX; // skipped MBs in b frames are quite rare in mpeg1/2 and its a bit tricky to skip them anyway
     
     return 0;
 fail: //for the CHECKED_ALLOCZ macro
@@ -1444,7 +1444,7 @@ int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx)
 {
     int i;
     AVFrame *pic;
-    s->mb_skiped = 0;
+    s->mb_skipped = 0;
 
     assert(s->last_picture_ptr==NULL || s->out_format != FMT_H264 || s->codec_id == CODEC_ID_SVQ3);
 
@@ -3227,7 +3227,7 @@ static inline void MPV_motion(MpegEncContext *s,
         const int mot_stride= s->b8_stride;
         const int mot_xy= mb_x*2 + mb_y*2*mot_stride;
 
-        assert(!s->mb_skiped);
+        assert(!s->mb_skipped);
                 
         memcpy(mv_cache[1][1], s->current_picture.motion_val[0][mot_xy           ], sizeof(int16_t)*4);
         memcpy(mv_cache[2][1], s->current_picture.motion_val[0][mot_xy+mot_stride], sizeof(int16_t)*4);
@@ -3699,11 +3699,11 @@ static always_inline void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM bloc
 
             assert(age);
 
-            if (s->mb_skiped) {
-                s->mb_skiped= 0;
+            if (s->mb_skipped) {
+                s->mb_skipped= 0;
                 assert(s->pict_type!=I_TYPE);
  
-                (*mbskip_ptr) ++; /* indicate that this time we skiped it */
+                (*mbskip_ptr) ++; /* indicate that this time we skipped it */
                 if(*mbskip_ptr >99) *mbskip_ptr= 99;
 
                 /* if previous was skipped too, then nothing to do !  */
@@ -4374,7 +4374,7 @@ static inline void copy_context_before_encode(MpegEncContext *d, MpegEncContext
     d->misc_bits= s->misc_bits;
     d->last_bits= 0;
 
-    d->mb_skiped= 0;
+    d->mb_skipped= 0;
     d->qscale= s->qscale;
     d->dquant= s->dquant;
 }
@@ -4401,7 +4401,7 @@ static inline void copy_context_after_encode(MpegEncContext *d, MpegEncContext *
     d->misc_bits= s->misc_bits;
 
     d->mb_intra= s->mb_intra;
-    d->mb_skiped= s->mb_skiped;
+    d->mb_skipped= s->mb_skipped;
     d->mv_type= s->mv_type;
     d->mv_dir= s->mv_dir;
     d->pb= s->pb;
@@ -4773,7 +4773,7 @@ static int encode_thread(AVCodecContext *c, void *arg){
                 s->first_slice_line=0; 
             }
 
-            s->mb_skiped=0;
+            s->mb_skipped=0;
             s->dquant=0; //only for QP_RD
 
             if(mb_type & (mb_type-1) || (s->flags & CODEC_FLAG_QP_RD)){ // more than 1 MB type possible or CODEC_FLAG_QP_RD
@@ -4810,13 +4810,13 @@ static int encode_thread(AVCodecContext *c, void *arg){
                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_INTER_I, pb, pb2, tex_pb, 
                                  &dmin, &next_block, 0, 0);
                 }
-                if(mb_type&CANDIDATE_MB_TYPE_SKIPED){
+                if(mb_type&CANDIDATE_MB_TYPE_SKIPPED){
                     s->mv_dir = MV_DIR_FORWARD;
                     s->mv_type = MV_TYPE_16X16;
                     s->mb_intra= 0;
                     s->mv[0][0][0] = 0;
                     s->mv[0][0][1] = 0;
-                    encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_SKIPED, pb, pb2, tex_pb, 
+                    encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_SKIPPED, pb, pb2, tex_pb, 
                                  &dmin, &next_block, s->mv[0][0][0], s->mv[0][0][1]);
                 }
                 if(mb_type&CANDIDATE_MB_TYPE_INTER4V){                 
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index a1c459e979..9983718023 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -29,7 +29,7 @@
 #include "dsputil.h"
 #include "bitstream.h"
 
-#define FRAME_SKIPED 100 ///< return value for header parsers if frame is not coded
+#define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
 
 enum OutputFormat {
     FMT_MPEG1,
@@ -203,7 +203,7 @@ struct MpegEncContext;
  */
 typedef struct MotionEstContext{
     AVCodecContext *avctx;
-    int skip;                          ///< set if ME is skiped for the current MB 
+    int skip;                          ///< set if ME is skipped for the current MB 
     int co_located_mv[4][2];           ///< mv from last p frame for direct mode ME 
     int direct_basis_mv[4][2];
     uint8_t *scratchpad;               ///< data area for the me algo, so that the ME doesnt need to malloc/free 
@@ -350,7 +350,7 @@ typedef struct MpegEncContext {
     int ac_pred;
     uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip 
 #define PREV_PICT_TYPES_BUFFER_SIZE 256
-    int mb_skiped;                ///< MUST BE SET only during DECODING 
+    int mb_skipped;                ///< MUST BE SET only during DECODING 
     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example) 
                                    and used for b-frame encoding & decoding (contains skip table of next P Frame) */
     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding 
@@ -378,7 +378,7 @@ typedef struct MpegEncContext {
     /* motion compensation */
     int unrestricted_mv;        ///< mv can point outside of the coded picture 
     int h263_long_vectors;      ///< use horrible h263v1 long vector mode 
-    int decode;                 ///< if 0 then decoding will be skiped (for encoding b frames for example)
+    int decode;                 ///< if 0 then decoding will be skipped (for encoding b frames for example)
 
     DSPContext dsp;             ///< pointers for accelerated dsp fucntions 
     int f_code;                 ///< forward MV resolution 
@@ -427,7 +427,7 @@ typedef struct MpegEncContext {
     int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...) 
                         for b-frames rounding mode is allways 0 */
 
-    int hurry_up;     /**< when set to 1 during decoding, b frames will be skiped
+    int hurry_up;     /**< when set to 1 during decoding, b frames will be skipped
                          when set to 2 idct/dequant will be skipped too */
                         
     /* macroblock layer */
@@ -438,7 +438,7 @@ typedef struct MpegEncContext {
 #define CANDIDATE_MB_TYPE_INTRA    0x01
 #define CANDIDATE_MB_TYPE_INTER    0x02
 #define CANDIDATE_MB_TYPE_INTER4V  0x04
-#define CANDIDATE_MB_TYPE_SKIPED   0x08
+#define CANDIDATE_MB_TYPE_SKIPPED   0x08
 //#define MB_TYPE_GMC      0x10
 
 #define CANDIDATE_MB_TYPE_DIRECT   0x10
diff --git a/libavcodec/msmpeg4.c b/libavcodec/msmpeg4.c
index b40916b538..23e4c1ec8b 100644
--- a/libavcodec/msmpeg4.c
+++ b/libavcodec/msmpeg4.c
@@ -1492,7 +1492,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
                 s->mv_type = MV_TYPE_16X16;
                 s->mv[0][0][0] = 0;
                 s->mv[0][0][1] = 0;
-                s->mb_skiped = 1;
+                s->mb_skipped = 1;
                 return 0;
             }
         }
@@ -1580,7 +1580,7 @@ static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
                 s->mv_type = MV_TYPE_16X16;
                 s->mv[0][0][0] = 0;
                 s->mv[0][0][1] = 0;
-                s->mb_skiped = 1;
+                s->mb_skipped = 1;
                 *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
 
                 return 0;
diff --git a/libavcodec/ratecontrol.c b/libavcodec/ratecontrol.c
index 19641d453d..94fca1ea47 100644
--- a/libavcodec/ratecontrol.c
+++ b/libavcodec/ratecontrol.c
@@ -79,7 +79,7 @@ int ff_rate_control_init(MpegEncContext *s)
         rcc->entry = (RateControlEntry*)av_mallocz(i*sizeof(RateControlEntry));
         rcc->num_entries= i;
         
-        /* init all to skiped p frames (with b frames we might have a not encoded frame at the end FIXME) */
+        /* init all to skipped p frames (with b frames we might have a not encoded frame at the end FIXME) */
         for(i=0; i<rcc->num_entries; i++){
             RateControlEntry *rce= &rcc->entry[i];
             rce->pict_type= rce->new_pict_type=P_TYPE;
diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c
index 9bcdfcf1ab..23106bcc0a 100644
--- a/libavcodec/rv10.c
+++ b/libavcodec/rv10.c
@@ -468,8 +468,8 @@ static int rv20_decode_picture_header(MpegEncContext *s)
             s->time= seq;
             s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
             if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
-                av_log(s->avctx, AV_LOG_DEBUG, "messed up order, seeking?, skiping current b frame\n");
-                return FRAME_SKIPED;
+                av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
+                return FRAME_SKIPPED;
             }
         }
     }
diff --git a/libavcodec/snow.c b/libavcodec/snow.c
index 9cfddfa951..0ea6b0c3ab 100644
--- a/libavcodec/snow.c
+++ b/libavcodec/snow.c
@@ -3338,7 +3338,7 @@ static int encode_init(AVCodecContext *avctx)
     int plane_index;
 
     if(avctx->strict_std_compliance >= 0){
-        av_log(avctx, AV_LOG_ERROR, "this codec is under development, files encoded with it wont be decodeable with future versions!!!\n"
+        av_log(avctx, AV_LOG_ERROR, "this codec is under development, files encoded with it may not be decodable with future versions!!!\n"
                "use vstrict=-1 / -strict -1 to use it anyway\n");
         return -1;
     }
diff --git a/libavcodec/vc9.c b/libavcodec/vc9.c
index 351e93f46f..5225dde495 100644
--- a/libavcodec/vc9.c
+++ b/libavcodec/vc9.c
@@ -891,7 +891,7 @@ void free_bitplane(BitPlane *bp)
     if (bp->data) av_freep(&bp->data);
 }
 
-/** Decode rows by checking if they are skiped
+/** Decode rows by checking if they are skipped
  * @param plane Buffer to store decoded bits
  * @param[in] width Width of this buffer
  * @param[in] height Height of this buffer
@@ -910,7 +910,7 @@ static void decode_rowskip(uint8_t* plane, int width, int height, int stride, Ge
     }
 }
 
-/** Decode columns by checking if they are skiped
+/** Decode columns by checking if they are skipped
  * @param plane Buffer to store decoded bits
  * @param[in] width Width of this buffer
  * @param[in] height Height of this buffer
@@ -1126,14 +1126,14 @@ static int decode_b_picture_primary_header(VC9Context *v)
     if (v->profile == PROFILE_SIMPLE)
     {
         av_log(v->s.avctx, AV_LOG_ERROR, "Found a B frame while in Simple Profile!\n");
-        return FRAME_SKIPED;
+        return FRAME_SKIPPED;
     }
     v->bfraction = vc9_bfraction_lut[get_vlc2(gb, vc9_bfraction_vlc.table,
                                               VC9_BFRACTION_VLC_BITS, 2)];
     if (v->bfraction < -1)
     {
         av_log(v->s.avctx, AV_LOG_ERROR, "Invalid BFRaction\n");
-        return FRAME_SKIPED;
+        return FRAME_SKIPPED;
     }
     else if (!v->bfraction)
     {
@@ -1474,7 +1474,7 @@ static int standard_decode_picture_primary_header(VC9Context *v)
     case B_TYPE: status = decode_b_picture_primary_header(v); break;
     }
 
-    if (status == FRAME_SKIPED)
+    if (status == FRAME_SKIPPED)
     {
       av_log(v->s.avctx, AV_LOG_INFO, "Skipping frame...\n");
       return status;
@@ -1499,7 +1499,7 @@ static int standard_decode_picture_secondary_header(VC9Context *v)
     case BI_TYPE:
     case I_TYPE: break; //Nothing needed as it's done in the epilog
     }
-    if (status < 0) return FRAME_SKIPED;
+    if (status < 0) return FRAME_SKIPPED;
 
     /* AC Syntax */
     v->c_ac_table_index = decode012(gb);
@@ -1540,7 +1540,7 @@ static int advanced_decode_picture_primary_header(VC9Context *v)
     }
 
     type = get_prefix(gb, 0, 4);
-    if (type > 4 || type < 0) return FRAME_SKIPED;
+    if (type > 4 || type < 0) return FRAME_SKIPPED;
     v->s.pict_type = type_table[type];
     av_log(v->s.avctx, AV_LOG_INFO, "AP Frame Type: %i\n", v->s.pict_type);
 
@@ -1578,7 +1578,7 @@ static int advanced_decode_picture_primary_header(VC9Context *v)
     case I_TYPE: if (decode_i_picture_primary_header(v) < 0) return -1;
     case P_TYPE: if (decode_p_picture_primary_header(v) < 0) return -1;
     case BI_TYPE:
-    case B_TYPE: if (decode_b_picture_primary_header(v) < 0) return FRAME_SKIPED;
+    case B_TYPE: if (decode_b_picture_primary_header(v) < 0) return FRAME_SKIPPED;
     default: return -1;
     }
 }
@@ -1599,7 +1599,7 @@ static int advanced_decode_picture_secondary_header(VC9Context *v)
     case BI_TYPE:
     case I_TYPE: status = decode_i_picture_secondary_header(v); break; 
     }
-    if (status<0) return FRAME_SKIPED;
+    if (status<0) return FRAME_SKIPPED;
 
     /* AC Syntax */
     v->c_ac_table_index = decode012(gb);
@@ -2367,7 +2367,7 @@ static int vc9_decode_frame(AVCodecContext *avctx,
 {
     VC9Context *v = avctx->priv_data;
     MpegEncContext *s = &v->s;
-    int ret = FRAME_SKIPED, len;
+    int ret = FRAME_SKIPPED, len;
     AVFrame *pict = data;
     uint8_t *tmp_buf;
     v->s.avctx = avctx;
@@ -2470,7 +2470,7 @@ static int vc9_decode_frame(AVCodecContext *avctx,
     else
 #endif
         ret= standard_decode_picture_primary_header(v);
-    if (ret == FRAME_SKIPED) return buf_size;
+    if (ret == FRAME_SKIPPED) return buf_size;
     /* skip if the header was thrashed */
     if (ret < 0){
         av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
@@ -2518,7 +2518,7 @@ static int vc9_decode_frame(AVCodecContext *avctx,
     else
 #endif
         ret = standard_decode_picture_secondary_header(v);
-    if (ret<0) return FRAME_SKIPED; //FIXME Non fatal for now
+    if (ret<0) return FRAME_SKIPPED; //FIXME Non fatal for now
 
     //We consider the image coded in only one slice
 #if HAS_ADVANCED_PROFILE
@@ -2530,15 +2530,15 @@ static int vc9_decode_frame(AVCodecContext *avctx,
             case P_TYPE: ret = decode_p_mbs(v); break;
             case B_TYPE:
             case BI_TYPE: ret = decode_b_mbs(v); break;
-            default: ret = FRAME_SKIPED;
+            default: ret = FRAME_SKIPPED;
         }
-        if (ret == FRAME_SKIPED) return buf_size; //We ignore for now failures
+        if (ret == FRAME_SKIPPED) return buf_size; //We ignore for now failures
     }
     else
 #endif
     {
         ret = standard_decode_mbs(v);
-        if (ret == FRAME_SKIPED) return buf_size;
+        if (ret == FRAME_SKIPPED) return buf_size;
     }
 
     ff_er_frame_end(s);
diff --git a/libavcodec/wmv2.c b/libavcodec/wmv2.c
index b6376d80b6..e14ee08481 100644
--- a/libavcodec/wmv2.c
+++ b/libavcodec/wmv2.c
@@ -474,7 +474,7 @@ s->picture_number++; //FIXME ?
 //        return wmv2_decode_j_picture(w); //FIXME
 
     if(w->j_type){
-        av_log(s->avctx, AV_LOG_ERROR, "J-type picture isnt supported\n");
+        av_log(s->avctx, AV_LOG_ERROR, "J-type picture is not supported\n");
         return -1;
     }
 
@@ -723,7 +723,7 @@ static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
             s->mv_type = MV_TYPE_16X16;
             s->mv[0][0][0] = 0;
             s->mv[0][0][1] = 0;
-            s->mb_skiped = 1;
+            s->mb_skipped = 1;
             w->hshift=0;
             return 0;
         }
diff --git a/libavcodec/xvmcvideo.c b/libavcodec/xvmcvideo.c
index c1ff42b1fa..945263f403 100644
--- a/libavcodec/xvmcvideo.c
+++ b/libavcodec/xvmcvideo.c
@@ -148,7 +148,7 @@ const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
     }
 
    //MC doesn't skip blocks
-    s->mb_skiped = 0;
+    s->mb_skipped = 0;
 
 
    // do I need to export quant when I could not perform postprocessing?
diff --git a/libavformat/asf.c b/libavformat/asf.c
index cda6f2bb93..d88a840ee9 100644
--- a/libavformat/asf.c
+++ b/libavformat/asf.c
@@ -579,7 +579,7 @@ static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
 	    asf_st->frag_offset = 0;
 	    if (asf->packet_frag_offset != 0) {
 		url_fskip(pb, asf->packet_frag_size);
-		av_log(s, AV_LOG_INFO, "ff asf parser skiping %db\n", asf->packet_frag_size);
+		av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
 		asf->packet_size_left -= asf->packet_frag_size;
 		continue;
 	    }
diff --git a/libavformat/dc1394.c b/libavformat/dc1394.c
index 2aba671da1..513205214b 100644
--- a/libavformat/dc1394.c
+++ b/libavformat/dc1394.c
@@ -102,7 +102,7 @@ static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
     /* Now lets prep the hardware */
     dc1394->handle = dc1394_create_handle(0); /* FIXME: gotta have ap->port */
     if (!dc1394->handle) {
-	av_log(c, AV_LOG_ERROR, "Can't aquire dc1394 handle on port %d\n", 0 /* ap->port */);
+	av_log(c, AV_LOG_ERROR, "Can't acquire dc1394 handle on port %d\n", 0 /* ap->port */);
         goto out;
     }
     camera_nodes = dc1394_get_camera_nodes(dc1394->handle, &res, 1);
diff --git a/libavformat/nut.c b/libavformat/nut.c
index 3a83d4f6b3..89a6aa720f 100644
--- a/libavformat/nut.c
+++ b/libavformat/nut.c
@@ -931,7 +931,7 @@ static int decode_main_header(NUTContext *nut){
     }
 
     if(check_checksum(bc)){
-        av_log(s, AV_LOG_ERROR, "Main header checksum missmatch\n");
+        av_log(s, AV_LOG_ERROR, "Main header checksum mismatch\n");
         return -1;
     }
 
@@ -1012,7 +1012,7 @@ static int decode_stream_header(NUTContext *nut){
         st->codec.channels = get_v(bc);
     }
     if(check_checksum(bc)){
-        av_log(s, AV_LOG_ERROR, "Stream header %d checksum missmatch\n", stream_id);
+        av_log(s, AV_LOG_ERROR, "Stream header %d checksum mismatch\n", stream_id);
         return -1;
     }
     av_set_pts_info(s->streams[stream_id], 60, denom, nom);
@@ -1067,7 +1067,7 @@ static int decode_info_header(NUTContext *nut){
         }
     }
     if(check_checksum(bc)){
-        av_log(s, AV_LOG_ERROR, "Info header checksum missmatch\n");
+        av_log(s, AV_LOG_ERROR, "Info header checksum mismatch\n");
         return -1;
     }
     return 0;