Opened 10 years ago

Last modified 9 years ago

#3578 new defect

h.264 from avi to mkv/mp4

Reported by: Alex-Frst Owned by:
Priority: normal Component: undetermined
Version: unspecified Keywords: h264
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no


Summary of the bug:
How to reproduce:

% ffmpeg -fflags +genpts -i test.avi  -c copy test.mkv 

Many video players (MPC-HC/BE, VLC) can not play H.264 video files remuxed by ffmpeg from avi to mkv or mp4 without lots of droppe frames (B-frames?).
Is this ffmpeg's problem? Or MPC-HC/BE, VLC?

Change History (5)

comment:2 by Carl Eugen Hoyos, 10 years ago

Please provide the failing command line together with the complete, uncut console output to make this a valid ticket.

comment:3 by Alex-Frst, 10 years ago

Command does not fail. But produced video file can not be played smoothly (without dropped frames) in VLC, MPC-HC, MPC-BE.

I:\>ffmpeg.exe -fflags +genpts -i test.avi -c copy test.mkv
ffmpeg version N-62569-gf57ac37 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 19 2014 22:13:55 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
  libavutil      52. 77.100 / 52. 77.100
  libavcodec     55. 58.105 / 55. 58.105
  libavformat    55. 37.101 / 55. 37.101
  libavdevice    55. 13.100 / 55. 13.100
  libavfilter     4.  4.100 /  4.  4.100
  libswscale      2.  6.100 /  2.  6.100
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, avi, from 'test.avi':
    encoder         : Lavf55.37.100
  Duration: 00:01:00.04, start: 0.000000, bitrate: 4773 kb/s
    Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 4764 kb/s, 47.95 fps, 23.98 tbr, 47.95 tbn, 47.95 tbc
Output #0, matroska, to 'test.mkv':
    encoder         : Lavf55.37.101
    Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 4764 kb/s, 47.95 fps, 1k tbn, 47.95 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame= 1441 fps=0.0 q=-1.0 Lsize=   34922kB time=00:01:00.03 bitrate=4765.0kbits/s
video:34911kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.033431%

comment:4 by Alex-Frst, 10 years ago

I compared mkv generated by ffmpeg with generated by mkvtoolnix (it plays fine with VLC,MPC-HC/BE). Looks like ffmpeg generates PST in different (wrong?) order. Maybe problem in genpts?

Look at frames 16-17-18-19-..:

1	pkt_pts=0	pkt_pos=5461	pkt_size=1588	pict_type=I	coded_picture_number=0	
2	pkt_pts=0	pkt_pos=7239	pkt_size=93	pict_type=B	coded_picture_number=3	
3	pkt_pts=0	pkt_pos=7116	pkt_size=117	pict_type=B	coded_picture_number=2	
4	pkt_pts=0	pkt_pos=7338	pkt_size=82	pict_type=B	coded_picture_number=4	
5	pkt_pts=42	pkt_pos=7057	pkt_size=47	pict_type=P	coded_picture_number=1	
6	pkt_pts=63	pkt_pos=7428	pkt_size=45	pict_type=P	coded_picture_number=5	
7	pkt_pts=83	pkt_pos=7485	pkt_size=45	pict_type=P	coded_picture_number=6	
8	pkt_pts=125	pkt_pos=7536	pkt_size=46	pict_type=P	coded_picture_number=7	
9	pkt_pts=167	pkt_pos=7588	pkt_size=46	pict_type=P	coded_picture_number=8	
10	pkt_pts=209	pkt_pos=7640	pkt_size=46	pict_type=P	coded_picture_number=9	
11	pkt_pts=250	pkt_pos=7692	pkt_size=47	pict_type=P	coded_picture_number=10	
12	pkt_pts=292	pkt_pos=7745	pkt_size=47	pict_type=P	coded_picture_number=11	
13	pkt_pts=334	pkt_pos=17733	pkt_size=640	pict_type=B	coded_picture_number=13	
14	pkt_pts=375	pkt_pos=7799	pkt_size=9927	pict_type=P	coded_picture_number=12	
15	pkt_pts=417	pkt_pos=18381	pkt_size=199942	pict_type=I	coded_picture_number=14	
16	pkt_pts=459	pkt_pos=218331	pkt_size=40888	pict_type=P	coded_picture_number=15	
17	pkt_pts=501	pkt_pos=460384	pkt_size=27369	pict_type=B	coded_picture_number=18	
18	pkt_pts=542	pkt_pos=398240	pkt_size=62136	pict_type=B	coded_picture_number=17	
19	pkt_pts=584	pkt_pos=487761	pkt_size=18984	pict_type=B	coded_picture_number=19	
20	pkt_pts=626	pkt_pos=259227	pkt_size=139005	pict_type=P	coded_picture_number=16	
21	pkt_pts=667	pkt_pos=728050	pkt_size=23606	pict_type=B	coded_picture_number=22	
22	pkt_pts=709	pkt_pos=674950	pkt_size=53092	pict_type=B	coded_picture_number=21	
23	pkt_pts=751	pkt_pos=751663	pkt_size=15958	pict_type=B	coded_picture_number=23	


1	pkt_pts=42	pkt_pos=588	pkt_size=1548	pict_type=I	coded_picture_number=0	
2	pkt_pts=125	pkt_pos=2318	pkt_size=93	pict_type=B	coded_picture_number=3	
3	pkt_pts=83	pkt_pos=2195	pkt_size=117	pict_type=B	coded_picture_number=2	
4	pkt_pts=167	pkt_pos=2417	pkt_size=82	pict_type=B	coded_picture_number=4	
5	pkt_pts=63	pkt_pos=2142	pkt_size=47	pict_type=P	coded_picture_number=1	
6	pkt_pts=209	pkt_pos=2505	pkt_size=45	pict_type=P	coded_picture_number=5	
7	pkt_pts=250	pkt_pos=2556	pkt_size=45	pict_type=P	coded_picture_number=6	
8	pkt_pts=292	pkt_pos=2607	pkt_size=46	pict_type=P	coded_picture_number=7	
9	pkt_pts=334	pkt_pos=2659	pkt_size=46	pict_type=P	coded_picture_number=8	
10	pkt_pts=375	pkt_pos=2711	pkt_size=46	pict_type=P	coded_picture_number=9	
11	pkt_pts=417	pkt_pos=2763	pkt_size=47	pict_type=P	coded_picture_number=10	
12	pkt_pts=459	pkt_pos=2816	pkt_size=47	pict_type=P	coded_picture_number=11	
13	pkt_pts=542	pkt_pos=12804	pkt_size=640	pict_type=B	coded_picture_number=13	
14	pkt_pts=501	pkt_pos=2870	pkt_size=9927	pict_type=P	coded_picture_number=12	
15	pkt_pts=584	pkt_pos=13452	pkt_size=199942	pict_type=I	coded_picture_number=14	
16	pkt_pts=626	pkt_pos=213402	pkt_size=40888	pict_type=P	coded_picture_number=15	
17	pkt_pts=751	pkt_pos=455455	pkt_size=27369	pict_type=B	coded_picture_number=18	
18	pkt_pts=709	pkt_pos=393311	pkt_size=62136	pict_type=B	coded_picture_number=17	
19	pkt_pts=792	pkt_pos=482832	pkt_size=18984	pict_type=B	coded_picture_number=19	
20	pkt_pts=667	pkt_pos=254298	pkt_size=139005	pict_type=P	coded_picture_number=16	
21	pkt_pts=918	pkt_pos=723121	pkt_size=23606	pict_type=B	coded_picture_number=22	
22	pkt_pts=876	pkt_pos=670021	pkt_size=53092	pict_type=B	coded_picture_number=21	
23	pkt_pts=959	pkt_pos=746734	pkt_size=15958	pict_type=B	coded_picture_number=23	

comment:5 by Carl Eugen Hoyos, 9 years ago

Keywords: h264 added
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