diff options
| -rw-r--r-- | libavcodec/frame_thread_encoder.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/frame_thread_encoder.c b/libavcodec/frame_thread_encoder.c index 687f23a17d..a9c1423502 100644 --- a/libavcodec/frame_thread_encoder.c +++ b/libavcodec/frame_thread_encoder.c @@ -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); |