#437 ADTS 22 KHz mono without SBR/PS, SamplingRate and Channels

[Zhiwei LIU]

Hello
I will upload a file aac.
The prolbem is >
With MediaInfo of version 0.7.24, its sampling rate is 44.1kHz; But with the old version of mediainfo(for example .0.7.16), the sampling rate is 22.05kHz

And i think that le value found by old version is correct
Thanks

[Zhiwei LIU]

[Jerome Martinez]

The problem with ADTS is that SBR and PS info are not in the header. I can have them with precision only with lot of work (4-5 days) because I must decode all the AAC subframes, I don't want to spend so much time on it for free and nobody is currently ready to sponsor it.

So currently detection in ADTS is done like this:
- <=32 KHz --> SBR activated, frequency*2
- mono --> PS activated, stereo
This is not the best, but the more simple, for example VLC codec info box displays too the same error.

This is OK for most of the files, but not your (22 KHz + mono, really, no SBR, no PS), but if I deactivate it I have issues with SBR and/or PS not displayed for other files. bWhatever I choose, I have problems.

Bug accepted, but will not be corrected until I find a sponsor for integrating AAC complete parsing in MediaInfo.

Note: you had this kind of problem before with 3GP file, I was able to detect the 3GP container and adapt the algorithm with 3GP (if it is 3GP, don't run the SBR/PS basic algorithm), but in this case, there is no mean to know the difference between 22 KHz (without SBR), or 44 KHz (with SBR), without integrating the AAC parsing.

[Zhiwei LIU]

Thank u for your comment.
I understand.