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ffmpeg
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sanity checks for bitrate tolerance and buffer size (= fail if a single frame at the 

requested bitrate would be bigger than the buffer size)

Originally committed as revision 9077 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-05-20 01:35:15 +00:00
parent cb590b4842
commit 64be2e60ef
1 changed files with 10 additions and 0 deletions
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10
libavcodec/mpegvideo.c
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@ -1029,6 +1029,16 @@ int MPV_encode_init(AVCodecContext *avctx)
return -1;
}
if(avctx->rc_buffer_size && avctx->bit_rate*av_q2d(avctx->time_base) > avctx->rc_buffer_size){
av_log(avctx, AV_LOG_INFO, "VBV buffer too small for bitrate\n");
return -1;
}
if(avctx->bit_rate*av_q2d(avctx->time_base) > avctx->bit_rate_tolerance){
av_log(avctx, AV_LOG_INFO, "bitrate tolerance too small for bitrate\n");
return -1;
}
if( s->avctx->rc_max_rate && s->avctx->rc_min_rate == s->avctx->rc_max_rate
&& (s->codec_id == CODEC_ID_MPEG1VIDEO || s->codec_id == CODEC_ID_MPEG2VIDEO)
&& 90000LL * (avctx->rc_buffer_size-1) > s->avctx->rc_max_rate*0xFFFFLL){