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Force automatic thread_count to 1 for cbr mjpeg frame threading.

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Constant bit rate mjpeg encoding fails for threads > 1 and frame threading.
This commit is contained in:
Carl Eugen Hoyos 2014-01-30 00:22:25 +01:00
parent 72afa381b3
commit cfc36666f6
1 changed files with 8 additions and 0 deletions
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8
libavcodec/frame_thread_encoder.c
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@ -125,6 +125,14 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
|| !(avctx->codec->capabilities & CODEC_CAP_INTRA_ONLY))
return 0;
if( !avctx->thread_count
&& avctx->codec_id == AV_CODEC_ID_MJPEG
&& !(avctx->flags & CODEC_FLAG_QSCALE)) {
av_log(avctx, AV_LOG_DEBUG,
"Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
"or a constant quantizer if you want to use multiple cpu cores\n");
avctx->thread_count = 1;
}
if(!avctx->thread_count) {
avctx->thread_count = av_cpu_count();
avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);