From cfbaeb311d906099bd9b8fbf0fa38cdb1b08f23e Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 20 Jun 2011 20:13:26 +0200 Subject: [PATCH] ffmpeg: print warning if encoding would duplicate massive amounts of frames Signed-off-by: Michael Niedermayer --- ffmpeg.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/ffmpeg.c b/ffmpeg.c index 0b1b1bee8d..dcb49d0fce 100644 --- a/ffmpeg.c +++ b/ffmpeg.c @@ -2326,6 +2326,11 @@ static int transcode(AVFormatContext **output_files, ost->frame_rate = ost->enc->supported_framerates[idx]; } codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num}; + if( av_q2d(codec->time_base) < 0.001 && video_sync_method + && (video_sync_method==1 || (video_sync_method<0 && !(os->oformat->flags & AVFMT_VARIABLE_FPS)))){ + av_log(os, AV_LOG_WARNING, "Frame rate very high for a muxer not effciciently supporting it.\n" + "Please consider specifiying a lower framerate, a different muxer or -vsync 2\n"); + } #if CONFIG_AVFILTER if (configure_video_filters(ist, ost)) {