id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed 383,ffmpeg SCR moves backwards in output muxed mpeg file,johnnyquid,,"I am not sure where to properly post bug reports so bear with me that I also posted in the ffmpeg-users as well. The issue was reported in Oct 2010 and fixed but the fix does not always seem to work. See http://ffmpeg-users.933282.n4.nabble.com/FFMPEG-encoded-MPEG-2-video-causes-error-in-DVDAuthor-td2995983.html for details. The issue is summarized below: The following command is used to encode videos in MPEG-2 (vob) format for DVD authoring: ffmpeg -i invideo.avi -target pal-dvd -f dvd outvideo.vob ('-target' can also be 'ntsc-dvd' or 'film-dvd') Video streams encoded in this manner using the latest SVN will cause the following error in DVDAuthor: 'ERR: SCR moves backwards, remultiplex input.' DVD authoring then stops. Demuxing the streams and using them individually, or remuxing them again, will make the error message disappear, but the resulting MPEG-2 files (m2v or vob) or DVD are problematic (choppy playback, no or wrong total playing time). This issue appeared with SVN-r25383, when the following two lines were added in libavformat/mpegenc.c: 1163 if(!s->last_scr) 1164 s->last_scr= dts; The current source code has changed to: The new code in mpegenc.c starting at line 1163 is now (but the issue still exists): pts= pkt->pts; dts= pkt->dts; if(pts != AV_NOPTS_VALUE) pts += 2*preload; if(dts != AV_NOPTS_VALUE){ if(!s->last_scr) s->last_scr= dts + preload; dts += 2*preload; } The error is shown in the below output from ffmpeg and dvdauthor: See the ffmpeg and dvdauthor output below: E:\Temp\bugfiles>ffmpeg -v 9 -loglevel 99 -i ranft.m2v -itsoffset -00:00:00.775 -i ranft.ac3 -vcodec copy -acodec copy -target ntsc-dvd -y ranft.mpg ffmpeg version N-31653-gfaa3381, Copyright (c) 2000-2011 the FFmpeg developers built on Jul 28 2011 01:57:12 with gcc 4.6.1 configuration: --enable-gpl --enable-version3 --enable-memalign-hack --enable- runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libo pencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm -- enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enabl e-libx264 --enable-libxavs --enable-libxvid --enable-zlib libavutil 51. 11. 0 / 51. 11. 0 libavcodec 53. 9. 0 / 53. 9. 0 libavformat 53. 6. 0 / 53. 6. 0 libavdevice 53. 2. 0 / 53. 2. 0 libavfilter 2. 27. 3 / 2. 27. 3 libswscale 2. 0. 0 / 2. 0. 0 libpostproc 51. 2. 0 / 51. 2. 0 [mpegvideo @ 01F2B5C0] Format mpegvideo probed with size=32768 and score=51 [mpeg1video @ 02000260] Unsupported bit depth: 0 [mpegvideo @ 01F2B5C0] max_analyze_duration 5000000 reached at 5005000 [mpegvideo @ 01F2B5C0] Estimating duration from bitrate, this may be inaccurate Input #0, mpegvideo, from 'ranft.m2v': Duration: 00:00:08.88, bitrate: 8999 kb/s Stream #0.0, 152, 1/1200000: Video: mpeg2video (Main), yuv420p, 720x480 [PAR 32:27 DAR 16:9], 1001/60000, 9000 kb/s, 29.97 fps, 29.97 tbr, 1200k tbn, 59.94 tbc [ac3 @ 01F2F720] Format ac3 probed with size=8192 and score=51 [ac3 @ 01F297A0] Unsupported bit depth: 0 [ac3 @ 01F2F720] max_analyze_duration 5000000 reached at 5024000 [ac3 @ 01F2F720] Estimating duration from bitrate, this may be inaccurate Input #1, ac3, from 'ranft.ac3': Duration: 00:00:20.83, start: 0.000000, bitrate: 384 kb/s Stream #1.0, 159, 1/90000: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s Output #0, dvd, to 'ranft.mpg': Metadata: encoder : Lavf53.6.0 Stream #0.0, 0, 1/90000: Video: mpeg2video, yuv420p, 720x480 [PAR 32:27 DAR 16:9], 1001/30000, q=2-31, 9000 kb/s, 90k tbn, 29.97 tbc Stream #0.1, 0, 1/90000: Audio: ac3, 48000 Hz, 5.1, 384 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #1.0 -> #0.1 Press [q] to stop, [?] for help frame= 573 fps= 0 q=-1.0 Lsize= 10882kB time=00:00:19.11 bitrate=4662.6kbits /s video:9766kB audio:977kB global headers:0kB muxing overhead 1.301527% E:\Temp\bugfiles>E:\Temp\bugfiles>dvdauthor.exe -o dvdtest -x dvd.xml DVDAuthor::dvdauthor, version 0.6.18. Build options: gnugetopt iconv freetype fribidi Send bugs to INFO: dvdauthor creating VTS STAT: Picking VTS 01 STAT: Processing e:\temp\bugfiles\ranft.mpg... ERR: SCR moves backwards, remultiplex input: 23131 < 8589910134 E:\Temp\bugfiles> ",defect,closed,normal,FFmpeg,unspecified,fixed,mpegps,,,,1,0