Hello

I have a large aac+ file (300MB), which I need to split into several (10MB each) files. What software can do this? Tags are not important.

Juha

Hi kerminen, believe this is what you want.

http://yamb.unite-video.com/download.html

download the installer.

cheers,
herefornow

thanks for that, I tried that but it doesn't work as I need it to do.

Yamb loses the he-information, resulting in 22500 lc-aac


Any other software?

Worked fine for me (24kb CBR file encoded with SBR+PS via Nero CLI encoder, split files decoded to WAV with Foobar2000 and high frequency content verified in Cool Edit 2000, as well as listening in fb2k)- I think you may need to upgrade mp4box (it's in the YAMB directory). The version that comes with YAMB is quite old (I believe it's 0.4.2), and there's a newer one (0.4.4) available here:

http://kurtnoise.free.fr/mp4tools/

no luck, I tried both 0.4.4 and 0.4.5dev

help needed still....

It would be so easy if the file was a mp3 file, but it surely can't be impossible to split a he-aac file?

What told you it is 22050Hz now? did you decode the file? And if so, with what decoder/player?

I am using latest Winamp 5.35, this is the file info I get for the original test file:
"
Size: 20201472 bytes
Format: AAC
MPEG-2 HE-AAC (Implicitly Signalled)
Sample Rate: 22050 (Output: 44100)
SBR: Present
Channels: 2 Mode: Stereo
Bitrate: 127477
"

After muxing to mp4 (Yamb can't split *.aac directly) and splitting, the test file info is:

"
Track Type Info
101 audio MPEG-2 AAC LC, 644.028 secs, 127 kbps, 22050 Hz
"

The original is implicitly signalled with SBR, so I bet the cut version also is. Play it and you'll see that it has SBR and will have 44100Hz samplerate.

OK, I'll do that, but how? How can I see that SBR is still present even though Winamp can't see that.

Abx:ing ???




edit: SBR word missing

Normally you can easily hear this. Also winamp should show that it is playing back 44kHz.

You are right, (of course ). The file info box for a splitted file test_01.mp4 in Winamp says MPEG-2 AAC LC, 127 kbps, 22050 Hz, but the Winamp main screen says 44khz 126kbs stereo. Is that a Winamp problem, if so, I could bug Nullsoft...

So I stand corrected and I am not losing any important data in the small splitted files?




There is always room for one decent handy aac splitter on the internet......

No it's normal. The SBR can only be detected once decoding starts when it is implicitly signalled.