How to tell if audio is HE-AAC/AAC+/SBR

[Akai-Shuichi]

I have a transport stream .ts that I have recorded from TV...and when i encode it and go to mux the raw aac file with the mkv (video) with mkvmerge it tells me this when I mux:

Warning: AAC files may contain HE-AAC / AAC+ / SBR AAC audio. This can NOT be detected automatically. Therefore you have to specifiy '--aac-is-sbr 0' manually for this input file if the file actually contains SBR AAC. The file will be muxed in the WRONG way otherwise. Also read mkvmerge's documentation.

I'm just wondering how exactly would you be able to tell if it contains SBR AAC?
Is there any program that would be able to tell you?

[jman98]

Recorded with WHAT? If you tell us what you used to record this stream it could help a lot. I'm not claiming to be an expert, but based on my limited experience if you used a Hauppauge device to record this, you shouldn't need that flag at all.

[bat999]

...

[Mephesto]

I have a transport stream .ts that I have recorded from TV...and when i encode it and go to mux the raw aac file with the mkv (video) with mkvmerge it tells me this when I mux:

Warning: AAC files may contain HE-AAC / AAC+ / SBR AAC audio. This can NOT be detected automatically. Therefore you have to specifiy '--aac-is-sbr 0' manually for this input file if the file actually contains SBR AAC. The file will be muxed in the WRONG way otherwise. Also read mkvmerge's documentation.

I'm just wondering how exactly would you be able to tell if it contains SBR AAC?
Is there any program that would be able to tell you?

I've muxed HE-AAC MP4 files in MKV without problems and it's detected automatically, not sure about raw HE-AAC files. If in doubt, experiment. I expect if not detected automatically then it will ignore the higher frequencies reproduced by SBR as devices unable to decode HE-AAC typically do. Do a test with an HE-AAC file with lots of upper frequencies. If you can't hear the upper frequencies in your muxed video then it didn't mux it properly.

MediaInfo should tell you if its an AAC-LC or HE-AAC file but if memory serves me right it tells you this for MP4 files, not raw. In any case, load the raw file in YAMB and it will tell you and give you the option to turn it into an MP4.