[FFmpeg-trac] #11028(undetermined:open): Audio of damaged MP4 suddenly stops playing

FFmpeg trac at avcodec.org
Sat May 25 06:01:46 EEST 2024


#11028: Audio of damaged MP4 suddenly stops playing
-------------------------------------+-------------------------------------
             Reporter:  PumaD        |                    Owner:  Gyan
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by Balling):

 * owner:  (none) => Gyan
 * status:  new => open

Comment:

 Does not it warn that

 [mov,mp4,m4a,3gp,3g2,mj2 @ 000001fabf400100] Sample size 3043950162 is too
 large


 ?

 Also, did you see this applied patch:
 https://patchwork.ffmpeg.org/project/ffmpeg/patch/20211116141533.1708-1-ffmpeg@gyani.pro/

 "The muxer should be adjusted to be able to write larger durations in the
 stts but that's a larger undertaking which I'll do later."


 Also by setting -v debug we see

 Processing st: 0, edit list 0 - media time: -1, duration: 2790


 Negative priming, indeed (media time of 0xFFFFFFFF means -1 per genius
 spec of MP4):

 00000110      Track duration:                    31 (0x0000001F) - 31
 (0x1F)
 00000114      Media time:                        4294967295 (0xFFFFFFFF)
 00000118      Media rate:                        65536 (0x00010000) -
 1.000
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11028#comment:4>
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