diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 8b9c2eecac..5f78190d49 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -683,7 +683,7 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
             *bd->opt_order       = get_bits(gb, opt_order_length);
             if (*bd->opt_order > sconf->max_order) {
                 *bd->opt_order = sconf->max_order;
-                av_log(avctx, AV_LOG_ERROR, "Predictor order too large!\n");
+                av_log(avctx, AV_LOG_ERROR, "Predictor order too large.\n");
                 return AVERROR_INVALIDDATA;
             }
         } else {
@@ -719,7 +719,7 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
                     int offset     = parcor_rice_table[sconf->coef_table][k][0];
                     quant_cof[k] = decode_rice(gb, rice_param) + offset;
                     if (quant_cof[k] < -64 || quant_cof[k] > 63) {
-                        av_log(avctx, AV_LOG_ERROR, "quant_cof %d is out of range\n", quant_cof[k]);
+                        av_log(avctx, AV_LOG_ERROR, "quant_cof %d is out of range.\n", quant_cof[k]);
                         return AVERROR_INVALIDDATA;
                     }
                 }
@@ -1184,7 +1184,7 @@ static int read_channel_data(ALSDecContext *ctx, ALSChannelData *cd, int c)
         current->master_channel = get_bits_long(gb, av_ceil_log2(channels));
 
         if (current->master_channel >= channels) {
-            av_log(ctx->avctx, AV_LOG_ERROR, "Invalid master channel!\n");
+            av_log(ctx->avctx, AV_LOG_ERROR, "Invalid master channel.\n");
             return -1;
         }
 
@@ -1209,7 +1209,7 @@ static int read_channel_data(ALSDecContext *ctx, ALSChannelData *cd, int c)
     }
 
     if (entries == channels) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "Damaged channel data!\n");
+        av_log(ctx->avctx, AV_LOG_ERROR, "Damaged channel data.\n");
         return -1;
     }
 
@@ -1369,7 +1369,7 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
 
         for (c = 0; c < avctx->channels; c++)
             if (ctx->chan_data[c] < ctx->chan_data_buffer) {
-                av_log(ctx->avctx, AV_LOG_ERROR, "Invalid channel data!\n");
+                av_log(ctx->avctx, AV_LOG_ERROR, "Invalid channel data.\n");
                 return -1;
             }
 
@@ -1478,7 +1478,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
     /* get output buffer */
     ctx->frame.nb_samples = ctx->cur_frame_length;
     if ((ret = ff_get_buffer(avctx, &ctx->frame)) < 0) {
-        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed.\n");
         return ret;
     }
 
@@ -1555,7 +1555,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
         // check CRC sums if this is the last frame
         if (ctx->cur_frame_length != sconf->frame_length &&
             ctx->crc_org != ctx->crc) {
-            av_log(avctx, AV_LOG_ERROR, "CRC error!\n");
+            av_log(avctx, AV_LOG_ERROR, "CRC error.\n");
         }
     }
 
@@ -1617,12 +1617,12 @@ static av_cold int decode_init(AVCodecContext *avctx)
     ctx->avctx = avctx;
 
     if (!avctx->extradata) {
-        av_log(avctx, AV_LOG_ERROR, "Missing required ALS extradata!\n");
+        av_log(avctx, AV_LOG_ERROR, "Missing required ALS extradata.\n");
         return -1;
     }
 
     if (read_specific_config(ctx)) {
-        av_log(avctx, AV_LOG_ERROR, "Reading ALSSpecificConfig failed!\n");
+        av_log(avctx, AV_LOG_ERROR, "Reading ALSSpecificConfig failed.\n");
         decode_end(avctx);
         return -1;
     }
@@ -1668,7 +1668,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
     if (!ctx->quant_cof              || !ctx->lpc_cof        ||
         !ctx->quant_cof_buffer       || !ctx->lpc_cof_buffer ||
         !ctx->lpc_cof_reversed_buffer) {
-        av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed!\n");
+        av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n");
         return AVERROR(ENOMEM);
     }
 
@@ -1693,7 +1693,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
         !ctx->opt_order || !ctx->store_prev_samples ||
         !ctx->use_ltp  || !ctx->ltp_lag ||
         !ctx->ltp_gain || !ctx->ltp_gain_buffer) {
-        av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed!\n");
+        av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n");
         decode_end(avctx);
         return AVERROR(ENOMEM);
     }
@@ -1711,7 +1711,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
                                            num_buffers);
 
         if (!ctx->chan_data_buffer || !ctx->chan_data || !ctx->reverted_channels) {
-            av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed!\n");
+            av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n");
             decode_end(avctx);
             return AVERROR(ENOMEM);
         }
@@ -1732,7 +1732,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     // allocate previous raw sample buffer
     if (!ctx->prev_raw_samples || !ctx->raw_buffer|| !ctx->raw_samples) {
-        av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed!\n");
+        av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n");
         decode_end(avctx);
         return AVERROR(ENOMEM);
     }
@@ -1750,7 +1750,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
                                     avctx->channels *
                                     av_get_bytes_per_sample(avctx->sample_fmt));
         if (!ctx->crc_buffer) {
-            av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed!\n");
+            av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n");
             decode_end(avctx);
             return AVERROR(ENOMEM);
         }