[FFmpeg-trac] #4765(avformat:new): concat and image (pipe) demuxer regression

FFmpeg trac at avcodec.org
Sat Aug 8 12:44:11 CEST 2015


#4765: concat and image (pipe) demuxer regression
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  important  |              Component:  avformat
                Version:  git-       |               Keywords:  image2
  master                             |  concat regression
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 http://thread.gmane.org/gmane.comp.video.ffmpeg.user/54496
 {{{
 $ ffmpeg -i fate-suite/lena.pnm                       out1.png
 $ ffmpeg -i fate-suite/lena.pnm -vf rotate=3.1415/2   out2.png
 $ ffmpeg -i fate-suite/lena.pnm -vf rotate=3.1415     out3.png
 $ ffmpeg -i fate-suite/lena.pnm -vf rotate=3.1415*3/2 out4.png
 }}}
 {{{
 $ cat concat.txt
 file out1.png
 duration 2
 file out2.png
 duration 4
 file out3.png
 duration 8
 file out4.png
 duration 16
 }}}
 The following command worked fine until
 b3fd2b175c90b4766034095e74e1f5112b1547ef (related to ticket #3901),
 current git head produces four output frames but with completely wrong
 duration.
 {{{
 $ ffmpeg -f concat -i concat.txt out.avi
 ffmpeg version N-74327-g7e9cd99 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 30.100 / 54. 30.100
   libavcodec     56. 57.100 / 56. 57.100
   libavformat    56. 40.101 / 56. 40.101
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 32.100 /  5. 32.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.101 /  1.  2.101
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, concat, from 'concat.txt':
   Duration: 00:00:30.00, start: 775903366.480000, bitrate: 0 kb/s
     Stream #0:0: Video: png, rgb24(pc), 256x256, 25 tbr, 25 tbn, 25 tbc
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf56.40.101
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 256x256,
 q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc56.57.100 mpeg4
 Stream mapping:
   Stream #0:0 -> #0:0 (png (native) -> mpeg4 (native))
 Press [q] to stop, [?] for help
 [concat @ 0x369a1c0] DTS -230575710986727 < -9214782102262 out of order
 DTS -221360928884465, next:40000 st:0 invalid dropping
 PTS -221360928884465, next:40000 invalid dropping st:0
 DTS -221360928884365, next:80000 st:0 invalid dropping
 PTS -221360928884365, next:80000 invalid dropping st:0
 DTS -221360928884165, next:120000 st:0 invalid dropping
 PTS -221360928884165, next:120000 invalid dropping st:0
 frame=    4 fps=0.0 q=2.4 Lsize=      81kB time=00:00:00.16
 bitrate=4145.1kbits/s
 video:75kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 7.498801%
 }}}
 Originally, {{{--disable-demuxer=image_*_pipe}}} could be used as work-
 around (and the issue was that only one output frame was produced), this
 is not possible since 7ff0137a1f3bd6b12ca0c55303085ef3128ded98

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4765>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


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