[FFmpeg-trac] #5977(avformat:open): Impossible to play incomplete mkv videos (was: Impossible to play incomplete H.264 "mkv" or "ts" videos)

FFmpeg trac at avcodec.org
Thu Nov 24 12:05:41 EET 2016


#5977: Impossible to play incomplete mkv videos
-------------------------------------+-------------------------------------
             Reporter:  thagoodboy   |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mkv          |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * status:  new => open
 * reproduced:  0 => 1
 * component:  undetermined => avformat
 * priority:  normal => important
 * version:  unspecified => git-master
 * keywords:   => mkv regression


Comment:

 For future tickets: Please remember to always provide a minimal command
 line that allows to reproduce the issue together with the complete, uncut
 console output.
 Regression since ee888cfbe777cd2916a3548c750e433ab8f8e6a5
 {{{
 $ ffmpeg -f lavfi -i testsrc out.mkv
 ffmpeg version N-82629-g9955123 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 41.101 / 55. 41.101
   libavcodec     57. 66.107 / 57. 66.107
   libavformat    57. 58.100 / 57. 58.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 67.100 /  6. 67.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, lavfi, from 'testsrc':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Output #0, matroska, to 'out.mkv':
   Metadata:
     encoder         : Lavf57.58.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240 [SAR
 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 1k tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.66.107 mpeg4
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
 Press [q] to stop, [?] for help
 frame= 6069 fps=1286 q=9.9 Lsize=    6265kB time=00:04:02.72 bitrate=
 211.4kbits/s speed=51.4x
 }}}
 {{{
 $ ffmpeg -i out.mkv
 ffmpeg version N-82629-g9955123 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 41.101 / 55. 41.101
   libavcodec     57. 66.107 / 57. 66.107
   libavformat    57. 58.100 / 57. 58.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 67.100 /  6. 67.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 [matroska,webm @ 0x204b280] Duplicate element
 Input #0, matroska,webm, from 'out.mkv':
   Duration: N/A, bitrate: N/A
 At least one output file must be specified
 }}}
 It is unlikely that such an issue is reproducible with mpegts output.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5977#comment:1>
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