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Correct time_base and repeat_pict for MPEG2 video. 

Patch by Ivan Schreter, schreter gmx net

Originally committed as revision 17572 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ivan Schreter 2009-02-24 20:23:19 +00:00 committed by Carl Eugen Hoyos
parent fc9fe42833
commit edbd72acea
2 changed files with 6 additions and 5 deletions
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2
libavcodec/mpeg12.c
View File

@ -1275,7 +1275,7 @@ static int mpeg_decode_postinit(AVCodecContext *avctx){
av_reduce(
&s->avctx->time_base.den,
&s->avctx->time_base.num,
ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1<<30);
//MPEG-2 aspect

9
libavcodec/mpegvideo_parser.c
View File

@ -81,7 +81,7 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
pc->height |=( vert_size_ext << 12);
avctx->bit_rate += (bit_rate_ext << 18) * 400;
avcodec_set_dimensions(avctx, pc->width, pc->height);
avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1);
avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1) * 2;
avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
avctx->codec_id = CODEC_ID_MPEG2VIDEO;
avctx->sub_id = 2; /* forces MPEG2 */
@ -95,14 +95,15 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
progressive_frame = buf[4] & (1 << 7);
/* check if we must repeat the frame */
s->repeat_pict = 1;
if (repeat_first_field) {
if (pc->progressive_sequence) {
if (top_field_first)
s->repeat_pict = 4;
s->repeat_pict = 5;
else
s->repeat_pict = 2;
s->repeat_pict = 3;
} else if (progressive_frame) {
s->repeat_pict = 1;
s->repeat_pict = 2;
}
}
}