[FFmpeg-trac] #4758(undetermined:new): Transcoding from huffyuv to webm creates incorrect timestamps

FFmpeg trac at avcodec.org
Wed Aug 5 18:22:04 CEST 2015


#4758: Transcoding from huffyuv to webm creates incorrect timestamps
-------------------------------------+-------------------------------------
             Reporter:  edoceo       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  duration     |               Blocked By:
  webm                               |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I had an original WebM file, which reported
     Duration: 00:07:54.65, start: 0.000000, bitrate: 751 kb/s

 Then I transcoded to HuffYUV
 ffmpeg -fflags +genpts -i '1f534644-7da1-4f5f-a6bf-fc7ceb4f6072.webm'
 -c:v huffyuv -b:v 1M -r 24 -pix_fmt yuv422p -c:a flac -ac 2 -f avi -y
 '1f534644-7da1-4f5f-a6bf-fc7ceb4f6072-P0.huffyuv'
      Duration: 00:07:54.91, start: 0.000000, bitrate: 7708 kb/s

 Then I transcode back to WebM with below command but the duration is very
 wrong
     Duration: 212:18:27.54, start: 0.000000, bitrate: 0 kb/s

 While encoding I can see the timestamp start jumping by large intervals
 towards the end of the video.

 I've uploaded 'ffmpeg-20150805-155732.log' and '1f534644-7da1-4f5f-a6bf-
 fc7ceb4f6072-P0.huffyuv' to the FTP location.

 {{{
 ffmpeg -fflags +genpts -i '/tmp/1f534644-7da1-4f5f-a6bf-
 fc7ceb4f6072-P0.huffyuv'  -c:v libvpx -crf 10 -b:v 1M -c:a libvorbis -ac 2
 -threads 4 -f webm -y '/tmp/1f534644-7da1-4f5f-a6bf-fc7ceb4f6072-P1.webm'


 ffmpeg version N-48686-gb27d4fd-static http://johnvansickle.com/ffmpeg/
 Copyright (c) 2000-2015 the FFmpeg developers
   built with gcc 4.9.3 (Debian 4.9.3-3)
   configuration: --enable-gpl --enable-version3 --disable-shared
 --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-
 libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-
 libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig
 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb
 --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
 gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls
 --enable-libvidstab --enable-libsoxr --cc=gcc-4.9
   libavutil      54. 29.100 / 54. 29.100
   libavcodec     56. 56.101 / 56. 56.101
   libavformat    56. 40.101 / 56. 40.101
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 30.100 /  5. 30.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.101 /  1.  2.101
   libpostproc    53.  3.100 / 53.  3.100
 [avi @ 0x38b74a0] non-interleaved AVI
 Input #0, avi, from '/tmp/1f534644-7da1-4f5f-a6bf-
 fc7ceb4f6072-P0.huffyuv':
   Metadata:
     encoder         : Lavf56.40.101
   Duration: 00:07:54.91, start: 0.000000, bitrate: 7708 kb/s
     Stream #0:0: Video: huffyuv (HFYU / 0x55594648), yuv422p, 640x480,
 7169 kb/s, SAR 1:1 DAR 4:3, 24 fps, 24 tbr, 24 tbn, 24 tbc
     Stream #0:1: Audio: flac ([172][241][0][0] / 0xF1AC), 48000 Hz,
 stereo, s32 (24 bit), 128 kb/s
 [libvpx @ 0x38b9860] v1.4.0-943-gc1b233d
 Output #0, webm, to '/tmp/1f534644-7da1-4f5f-a6bf-fc7ceb4f6072-P1.webm':
   Metadata:
     encoder         : Lavf56.40.101
     Stream #0:0: Video: vp8 (libvpx), yuv420p, 640x480 [SAR 1:1 DAR 4:3],
 q=-1--1, 1000 kb/s, 24 fps, 1k tbn, 24 tbc
     Metadata:
       encoder         : Lavc56.56.101 libvpx
     Stream #0:1: Audio: vorbis (libvorbis), 48000 Hz, stereo, fltp (24
 bit)
     Metadata:
       encoder         : Lavc56.56.101 libvorbis
 Stream mapping:
   Stream #0:0 -> #0:0 (huffyuv (native) -> vp8 (libvpx))
   Stream #0:1 -> #0:1 (flac (native) -> vorbis (libvorbis))
 Press [q] to stop, [?] for help
 [webm @ 0x38be580] Starting new cluster due to timestamp41 bitrate=
 279.3kbits/s
     Last message repeated 1 times
 [libvorbis @ 0x38bb180] Queue input is backward in time6.92 bitrate=
 0.2kbits/s
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047695; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047716; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047737; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047759; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047780; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047801; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047823; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047844; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047865; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047887; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047908; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047929; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047951; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047972; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764047993; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048015; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048036; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048057; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048079; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048100; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048121; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048143; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048164; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048185; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048207; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048228; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048249; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048271; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048292; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048313; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 [webm @ 0x38be580] Non-monotonous DTS in output stream 0:1; previous:
 764306681, current: 764048335; changing to 764306681. This may result in
 incorrect timestamps in the output file.
 frame= 1873 fps= 40 q=0.0 Lsize=   21063kB time=212:18:27.51 bitrate=
 0.2kbits/s
 video:16625kB audio:4084kB subtitle:0kB other streams:0kB global
 headers:4kB muxing overhead: 1.710563%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4758>
FFmpeg <https://ffmpeg.org>
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