[FFmpeg-trac] #5090(avformat:open): fragmented mp4 have bad dts on video track

[FFmpeg]

#5090: fragmented mp4 have bad dts on video track
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  alberto.zacchetti                  |                   Status:  open
                 Type:  defect       |                Component:  avformat
             Priority:  important    |               Resolution:
              Version:  git-master   |               Blocked By:
             Keywords:  mov          |  Reproduced by developer:  1
  regression                         |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:  regression => mov regression
 * status:  new => open
 * version:  2.8.3 => git-master
 * component:  undetermined => avformat
 * reproduced:  0 => 1


Comment:

 Regression since 4ab56667594842283dc5ae07f0daba2a2cb4d3af - related to
 ticket #3842.
 {{{
 $ ffmpeg -i videofrag.mp4 -qscale 2 out.avi
 ffmpeg version N-77351-gec1b95d Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 11.100 / 55. 11.100
   libavcodec     57. 18.100 / 57. 18.100
   libavformat    57. 20.100 / 57. 20.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 21.100 /  6. 21.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'videofrag.mp4':
   Metadata:
     major_brand     : iso5
     minor_version   : 1
     compatible_brands: avc1iso5dash
     creation_time   : 2015-12-16 17:00:57
   Duration: 00:00:56.08, start: 0.000000, bitrate: 265 kb/s
     Stream #0:0(ita): Video: h264 (Main) (avc1 / 0x31637661), yuv420p,
 720x480, 14589 kb/s, SAR 1:1 DAR 3:2, 29.97 fps, 90k tbr, 90k tbn, 180k
 tbc (default)
     Metadata:
       creation_time   : 2015-12-16 17:00:57
       handler_name    : VideoHandler
     Stream #0:1(ita): Audio: aac (LC) (mp4a / 0x6134706D), 32000 Hz,
 stereo, fltp, 63 kb/s (default)
     Metadata:
       creation_time   : 2015-12-16 17:00:57
       handler_name    : SoundHandler
 Please use -q:a or -q:v, -qscale is ambiguous
 Output #0, avi, to 'out.avi':
   Metadata:
     major_brand     : iso5
     minor_version   : 1
     compatible_brands: avc1iso5dash
     ISFT            : Lavf57.20.100
     Stream #0:0(ita): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 720x480
 [SAR 1:1 DAR 3:2], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
 (default)
     Metadata:
       creation_time   : 2015-12-16 17:00:57
       handler_name    : VideoHandler
       encoder         : Lavc57.18.100 mpeg4
     Side data:
       unknown side data type 10 (24 bytes)
     Stream #0:1(ita): Audio: ac3 ([0] [0][0] / 0x2000), 32000 Hz, stereo,
 fltp, 192 kb/s (default)
     Metadata:
       creation_time   : 2015-12-16 17:00:57
       handler_name    : SoundHandler
       encoder         : Lavc57.18.100 ac3
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
   Stream #0:1 -> #0:1 (aac (native) -> ac3 (native))
 Press [q] to stop, [?] for help
 Past duration 0.985344 too large
 Past duration 0.999016 too large
 Past duration 0.999443 too large
 Past duration 0.999260 too large
 Past duration 0.999748 too large
 Past duration 0.998711 too large
 Past duration 0.999199 too large
 Past duration 0.999992 too large
 frame=  121 fps=0.0 q=2.0 size=    3638kB time=00:00:41.18 bitrate=
 723.7kbits/s dup=0 drop=15[mov,mp4,m4a,3gp,3g2,mj2 @ 0x1f2b3c0] DTS 336330
 < 357968 out of order
 frame=  121 fps=0.0 q=2.0 Lsize=    4341kB time=00:01:00.00 bitrate=
 592.6kbits/s dup=0 drop=1678 speed= 105x
 video:2892kB audio:1406kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 0.975764%
 }}}
 The output file is completely broken.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5090#comment:3>
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