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mpeg1 overflowing dc coeff fix

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Originally committed as revision 2674 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2004-01-06 21:16:59 +00:00
parent af547ce5a4
commit 85e3374798
1 changed files with 7 additions and 2 deletions
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9
output_example.c
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@ -197,11 +197,16 @@ AVStream *add_video_stream(AVFormatContext *oc, int codec_id)
c->frame_rate = STREAM_FRAME_RATE; c->frame_rate = STREAM_FRAME_RATE;
c->frame_rate_base = 1; c->frame_rate_base = 1;
c->gop_size = 12; /* emit one intra frame every twelve frames at most */ c->gop_size = 12; /* emit one intra frame every twelve frames at most */
if (c->codec_id == CODEC_ID_MPEG1VIDEO || if (c->codec_id == CODEC_ID_MPEG2VIDEO) {
c->codec_id == CODEC_ID_MPEG2VIDEO) {
/* just for testing, we also add B frames */ /* just for testing, we also add B frames */
c->max_b_frames = 2; c->max_b_frames = 2;
} }
if (c->codec_id == CODEC_ID_MPEG1VIDEO){
/* needed to avoid using macroblocks in which some coeffs overflow
this doesnt happen with normal video, it just happens here as the
motion of the chroma plane doesnt match the luma plane */
c->mb_decision=2;
}
// some formats want stream headers to be seperate // some formats want stream headers to be seperate
if(!strcmp(oc->oformat->name, "mp4") || !strcmp(oc->oformat->name, "mov") || !strcmp(oc->oformat->name, "3gp")) if(!strcmp(oc->oformat->name, "mp4") || !strcmp(oc->oformat->name, "mov") || !strcmp(oc->oformat->name, "3gp"))
c->flags |= CODEC_FLAG_GLOBAL_HEADER; c->flags |= CODEC_FLAG_GLOBAL_HEADER;