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Topic: How to extract he-aac stream from mp4 to raw? (Read 4782 times) previous topic - next topic
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How to extract he-aac stream from mp4 to raw?

i'd like to mux he-aac stream into a rmvb with rv video.

i encode the audio by besweet to he-aac, and wan't to extract the aac stream out and mux it into rmvb using realmedia analyzer.

what program can i use? and is it possible to mux he-aac from nero-encoder into rmvb?

regards
MeteorRain

How to extract he-aac stream from mp4 to raw?

Reply #1 –
Quote
what program can i use? and is it possible to mux he-aac from nero-encoder into rmvb?
[{POST_SNAPBACK}][/a]

I think it's possible IF first you demux your aac stream from mp4 (with [a href="http://www.aziendeassociate.it/cd.asp?dir=/gpac/dev]mp4box[/url]) and remux your aac file into rm with dtdrive.

To mux rm and rmvb files, there is rmmuxer.

How to extract he-aac stream from mp4 to raw?

Reply #2 –
Cool!
mp4box extracts stream from mp4 into aac.
and RealMedia Analyzer can mux audio+video -> rmvb.

Now the problem is, the dtdrive CLI is tooooooooo confusing. i've read the help but still have little idea about it.

i have had a look at a small gui about demuxing streams from rm using dtdrive, it shows something like this:

"H:\mp4\DTDriver\dtdrive.exe" +u=y "I:\[ymer][tsubasa][18].rmvb" -W "I:\[ymer][tsubasa][18]_audio.rm"

i know the -W command is to specify the output file.

but how to remux he-aac-raw(or he-aac-in-mp4) to he-aac-in-rm?

need more help
MeteorRain

How to extract he-aac stream from mp4 to raw?

Reply #3 –
Quote
how to remux he-aac-raw(or he-aac-in-mp4) to he-aac-in-rm?
[a href="index.php?act=findpost&pid=338087"][{POST_SNAPBACK}][/a]


Code: [Select]
dtdrive.exe -W myaudio_file.rm myinput_file.aac



by assuming you have your aac file in the same dtdrive folder.

How to extract he-aac stream from mp4 to raw?

Reply #4 –
thanks! successfully convert the aac into aac-rm.

( and useful page: https://datatype.helixcommunity.org/2005/dtdrive/ )

but the result is completely broken.

vbr he-aac can't be contained in rm? >_>

regards
MeteorRain

How to extract he-aac stream from mp4 to raw?

Reply #5 –
Quote
vbr he-aac can't be contained in rm? >_>
[a href="index.php?act=findpost&pid=338207"][{POST_SNAPBACK}][/a]

Dunno but you don't know probably that Helix Producer can transcode wav/aiff files directly in he-aac into rm container... With constant bitrate of course not vbr.
 

How to extract he-aac stream from mp4 to raw?

Reply #6 –
Quote
Dunno but you don't know probably that Helix Producer can transcode wav/aiff files directly in he-aac into rm container... With constant bitrate of course not vbr.
[a href="index.php?act=findpost&pid=338231"][{POST_SNAPBACK}][/a]

i knew that.
but i prefer vbr he-aac if available... 

anyway, thank you