a strange file

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295126748
Posts: 29
Joined: Sun Mar 22, 2020 6:44 am

a strange file

Post by 295126748 »

Hello,

This is a ogg file on my pc
37_fadegirl_start.zip
(121.29 KiB) Downloaded 112 times
Everything show the Audio Bit Rate of it is

4294967 kbps

I have tried an other audio editor , it shows 0 bit

I felt strange :?:
Perhaps this file is a broken oggfile?
void
Developer
Posts: 15658
Joined: Fri Oct 16, 2009 11:31 pm

Re: a strange file

Post by void »

4294967 kbps is the average bitrate (nominal bitrate) stored in the header of this ogg file.

Everything will report this average bitrate as the Audio Bit Rate.
therube
Posts: 4678
Joined: Thu Sep 03, 2009 6:48 pm

Re: a strange file

Post by therube »

MediaInfo says:

Code: Select all

Overall bit rate mode                    : Variable
Overall bit rate                         : 270 kb/s
Writing application                      : Adobe(R) Audition(R)
ffprobe (ffmpeg) says:

Code: Select all

  Duration: 00:00:03.74, start: 0.000000, bitrate: 270 kb/s
  Stream #0:0: Audio: vorbis, 96000 Hz, stereo, fltp, 4294967 kb/s
    Metadata:
      ENCODER         : Adobe(R) Audition(R)
It might ? be this, What is the difference of duration bitrate and stream bitrate in ffmpeg/ffprobe??
295126748
Posts: 29
Joined: Sun Mar 22, 2020 6:44 am

Re: a strange file

Post by 295126748 »

therube wrote: Wed May 31, 2023 3:13 pm MediaInfo says:

Code: Select all

Overall bit rate mode                    : Variable
Overall bit rate                         : 270 kb/s
Writing application                      : Adobe(R) Audition(R)
ffprobe (ffmpeg) says:

Code: Select all

  Duration: 00:00:03.74, start: 0.000000, bitrate: 270 kb/s
  Stream #0:0: Audio: vorbis, 96000 Hz, stereo, fltp, 4294967 kb/s
    Metadata:
      ENCODER         : Adobe(R) Audition(R)
It might ? be this, What is the difference of duration bitrate and stream bitrate in ffmpeg/ffprobe??
not Overall bit rate.it is something called Audio Bit Rate

4294967 is too large.
common files will be 50,100kb,150kb ,roughly more or less

MediaInfo cannot read Audio bit rate of this file ,while can read Audio bit rate of other ogg files
ffmpeg can read it ,but it and says 4294967 kbs

So I guess the head of the ogg is broken or has been artificially modified?
void
Developer
Posts: 15658
Joined: Fri Oct 16, 2009 11:31 pm

Re: a strange file

Post by void »

Yes, the bit rate stored in the header is incorrect.

Everything will use the value stored in the header.
295126748
Posts: 29
Joined: Sun Mar 22, 2020 6:44 am

Re: a strange file

Post by 295126748 »

void wrote: Thu Jun 01, 2023 3:33 am Yes, the bit rate stored in the header is incorrect.

Everything will use the value stored in the header.
I’ve got it.

Thank you Void and Therube:)
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