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| author | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2014-01-30 00:55:35 +0100 |
|---|---|---|
| committer | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2014-01-30 01:37:27 +0100 |
| commit | e1cb6dc59ec26a9cfe2d8f95a72e78d123b19e3b (patch) | |
| tree | ad6588c8cd603483c8b653fb83868189b3441e64 | |
| parent | 1a5e8511d4ed8778ada6db05d6f24c38a9e15825 (diff) | |
| download | ffmpeg-e1cb6dc59ec26a9cfe2d8f95a72e78d123b19e3b.tar.gz | |
Warn the user if mjpeg cbr encoding with frame threading was requested.
| -rw-r--r-- | libavcodec/frame_thread_encoder.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/frame_thread_encoder.c b/libavcodec/frame_thread_encoder.c index a9c1423502..786599679d 100644 --- a/libavcodec/frame_thread_encoder.c +++ b/libavcodec/frame_thread_encoder.c @@ -133,6 +133,12 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){ "or a constant quantizer if you want to use multiple cpu cores\n"); avctx->thread_count = 1; } + if( avctx->thread_count > 1 + && avctx->codec_id == AV_CODEC_ID_MJPEG + && !(avctx->flags & CODEC_FLAG_QSCALE)) + av_log(avctx, AV_LOG_WARNING, + "MJPEG CBR encoding works badly with frame multi-threading, consider " + "using -threads 1, -thread_type slice or a constant quantizer.\n"); if(!avctx->thread_count) { avctx->thread_count = av_cpu_count(); avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS); |