Re: [FFmpeg-trac] #7311(avformat:new): wrong MOOV stsd

[FFmpeg]

#7311: wrong MOOV stsd
-+
 Reporter:  Mista_D  |Owner:
 Type:  defect   |   Status:  new
 Priority:  normal   |Component:  avformat
  Version:  unspecified  |   Resolution:
 Keywords:  moov |   Blocked By:
 Blocking:   |  Reproduced by developer:  0
Analyzed by developer:  0|
-+

Comment (by Mista_D):

 This seems to work:
 FFmpeg401 -y -drc_scale 0 -i source.ts -c copy -map a -map_metadata -1
 ac3.mp4

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Re: [FFmpeg-trac] #7311(avformat:new): wrong MOOV stsd

[FFmpeg]

#7311: wrong MOOV stsd
-+
 Reporter:  Mista_D  |Owner:
 Type:  defect   |   Status:  new
 Priority:  normal   |Component:  avformat
  Version:  unspecified  |   Resolution:
 Keywords:  moov |   Blocked By:
 Blocking:   |  Reproduced by developer:  0
Analyzed by developer:  0|
-+

Comment (by cehoyos):

 The issue you see is not reproducible with current FFmpeg git head?

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Re: [FFmpeg-trac] #7311(avformat:new): wrong MOOV stsd

[FFmpeg]

#7311: wrong MOOV stsd
-+
 Reporter:  Mista_D  |Owner:
 Type:  defect   |   Status:  new
 Priority:  normal   |Component:  avformat
  Version:  unspecified  |   Resolution:
 Keywords:  moov |   Blocked By:
 Blocking:   |  Reproduced by developer:  0
Analyzed by developer:  0|
-+

Comment (by Mista_D):

 Same problem detected with version 4.0.1

 FFmpeg401 -y -i test1.mpg -c copy -map a ac3.mp4

 ffmpeg version 4.0.1 Copyright (c) 2000-2018 the FFmpeg developers
   built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-18)


   libavutil  56. 14.100 / 56. 14.100
   libavcodec 58. 18.100 / 58. 18.100
   libavformat58. 12.100 / 58. 12.100
   libavdevice58.  3.100 / 58.  3.100
   libavfilter 7. 16.100 /  7. 16.100
   libswscale  5.  1.100 /  5.  1.100
   libswresample   3.  1.100 /  3.  1.100
   libpostproc55.  1.100 / 55.  1.100
 Input #0, mpegts, from '2.ts':
   Duration: 00:01:40.02, start: 1.40, bitrate: 54349 kb/s
   Program 1
 Metadata:
   service_name: Service01
   service_provider: FFmpeg
 Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
 yuv420p(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions,
 48700 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
 Stream #0:1[0x101](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000
 Hz, 5.1(side), fltp, 384 kb/s
 [mp4 @ 0x2f5b040] track 0: codec frame size is not set
 Output #0, mp4, to 'ac3.mp4':
   Metadata:
 encoder : Lavf58.12.100
 Stream #0:0(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side),
 fltp, 384 kb/s
 Stream mapping:
   Stream #0:1 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 size=4688kB time=00:01:39.96 bitrate= 384.2kbits/s speed= 222x
 video:0kB audio:4688kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.015208%

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[FFmpeg-trac] #7311(avformat:new): wrong MOOV stsd

[FFmpeg]

#7311: wrong MOOV stsd
--+---
 Reporter:  Mista_D   | Type:  defect
   Status:  new   | Priority:  normal
Component:  avformat  |  Version:  unspecified
 Keywords:  moov  |   Blocked By:
 Blocking:|  Reproduced by developer:  0
Analyzed by developer:  0 |
--+---
 When extracting AC3 track and saving it to mp4, the wrong type of ac-3
 packet is included in MOOV.

 packet header in stsd in MOOV set to 'AC-3' instead of 'ac-3'


 Section 5.6.1.1.2 of
 http://uvcentral.com/sites/default/files/files/PublicSpecs/CFFMediaFormat-
 2_1.pdf

 ffmpeg -i test.mpg -map a -c copy ac3.mp4
 ac4.mp4 HEX offset 1227D-12280: "AC-3"


 ffmpeg -i test.mpg -map a -c copy ac3.ac3
 ffmpeg -i ac3.ac3 -c copy 2step.mp4
 2step.mp4 HEX offset 1227D-12280: "ac-3"


 How can ac-3 be set properly in MP4's MOOV packets when extracting AC3
 track from MPG to MP4 please?

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