[FFmpeg-trac] #7150(undetermined:new): MXF: audio length mismatch

[FFmpeg]

#7150: MXF: audio length mismatch
-------------------------------------+-------------------------------------
             Reporter:  2mmi         |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 '''Summary of the bug:'''

 Some MP4 source-files will make an MXF file with uneven audio packets.
 Only the video stream and the first audio track will have the correct
 lenght.

 Maybe a premature flush ?

 Here is an output from "mxfsplit -w testout.MXF":

 Closing _0001_00000000, size 0x461f8
 Closing _0001_15010500.mpg, size 0x196a163
 Closing _0001_16040300.wav, size 0xb6ee2c
 Closing _0001_16040301.wav, size 0xb6df2c
 Closing _0001_16040302.wav, size 0xb6df2c
 Closing _0001_16040303.wav, size 0xb6df2c




 '''How to reproduce:'''

 ffmpeg -i failinput.mp4 -filter_complex
 channelsplit=channel_layout=quad[1][2][3][4] -map 0:v -map [1] -map [2]
 -map [3] -map [4] ^
 testout.mxf

 '''ffmpeg version''': ffmpeg version N-90762-g223f3dff8c


 '''FFmpeg console output with max debug info:'''
  - Here you can see there is only 2 packets in the last MXF element
 (3121).
 There should be 1 video + 4 audio.

 [mxf @ 000001dc8a9f16c0] out st:0 dts:3120
 [out_0_0 @ 000001dc8e405200] EOF on sink link out_0_0:default.
 [out_0_2 @ 000001dc8aa5b200] EOF on sink link out_0_2:default.
 [out_0_4 @ 000001dc8ba9df00] EOF on sink link out_0_4:default.
 [out_0_3 @ 000001dc8d1fea00] EOF on sink link out_0_3:default.
 [out_0_1 @ 000001dc8b40eb00] EOF on sink link out_0_1:default.
 No more output streams to write to, finishing.
 [mxf @ 000001dc8a9f16c0] out st:1 dts:3120
 [mxf @ 000001dc8a9f16c0] out st:2 dts:3120
 [mxf @ 000001dc8a9f16c0] out st:3 dts:3120
 [mxf @ 000001dc8a9f16c0] out st:4 dts:3120
 '''[mxf @ 000001dc8a9f16c0] out st:0 dts:3121
 [mxf @ 000001dc8a9f16c0] out st:1 dts:3121'''
 [mxf @ 000001dc8a9f16c0] essence container count:2
 [mxf @ 000001dc8a9f16c0] edit units count 59
 [mxf @ 000001dc8a9f16c0] essence container count:2
     Last message repeated 1 times
 [mxf @ 000001dc8a9f16c0] package type:1
 [mxf @ 000001dc8a9f16c0] package type:2
 frame= 3122 fps=215 q=31.0 Lsize=   78495kB time=00:02:04.88
 bitrate=5149.0kbits/s speed=8.59x
 video:26024kB audio:46832kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 7.738997%



 '''Complete console output:'''

 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'failinput.mp4':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42mp41
     creation_time   : 2018-04-12T13:43:17.000000Z
   Duration: 00:02:04.93, start: 0.000000, bitrate: 11506 kb/s
     Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv,
 bt709), 1920x1080, 11180 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
     Metadata:
       creation_time   : 2018-04-12T13:43:17.000000Z
       handler_name    : Alias Data Handler
       encoder         : AVC Coding
     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 317 kb/s (default)
     Metadata:
       creation_time   : 2018-04-12T13:43:17.000000Z
       handler_name    : Alias Data Handler
 File 'testout.mxf' already exists. Overwrite ? [y/N] y
 Stream mapping:
   Stream #0:1 (aac) -> channelsplit (graph 0)
   Stream #0:0 -> #0:0 (h264 (native) -> mpeg2video (native))
   channelsplit:FL (graph 0) -> Stream #0:1 (pcm_s16le)
   channelsplit:FR (graph 0) -> Stream #0:2 (pcm_s16le)
   channelsplit:BL (graph 0) -> Stream #0:3 (pcm_s16le)
   channelsplit:BR (graph 0) -> Stream #0:4 (pcm_s16le)
 Press [q] to stop, [?] for help
 Output #0, mxf, to 'testout.mxf':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42mp41
     encoder         : Lavf58.13.100
     Stream #0:0(eng): Video: mpeg2video (Main), yuv420p, 1920x1080,
 q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
     Metadata:
       creation_time   : 2018-04-12T13:43:17.000000Z
       handler_name    : Alias Data Handler
       encoder         : Lavc58.19.100 mpeg2video
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
     Stream #0:1: Audio: pcm_s16le, 48000 Hz, 1 channels (FL), s16, 768
 kb/s (default)
     Metadata:
       encoder         : Lavc58.19.100 pcm_s16le
     Stream #0:2: Audio: pcm_s16le, 48000 Hz, 1 channels (FR), s16, 768
 kb/s (default)
     Metadata:
       encoder         : Lavc58.19.100 pcm_s16le
     Stream #0:3: Audio: pcm_s16le, 48000 Hz, 1 channels (BL), s16, 768
 kb/s (default)
     Metadata:
       encoder         : Lavc58.19.100 pcm_s16le
     Stream #0:4: Audio: pcm_s16le, 48000 Hz, 1 channels (BR), s16, 768
 kb/s (default)
     Metadata:
       encoder         : Lavc58.19.100 pcm_s16le
 frame= 3122 fps=341 q=31.0 Lsize=   78495kB time=00:02:04.88
 bitrate=5149.0kbits/s speed=13.6x
 video:26024kB audio:46832kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 7.738997%

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7150>
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