How to fade AC3 to silence?

[JimmyBarnes]

Hi

Have searched the forums and the Net in vain re this. Maven 3D Pro gave some promise of doing this but it won't recognize the AC3 stream demuxed by VirtualDubMod 1.5.10.1 from an XviD AVI.

A few years ago DSPGuru said it was possible but he knew of no utility to do it. Is there one now?

thanx
JB

[Skelsgard]

I´m asuming that u mean without recompression, then there´s no tool outthere that does that.

[JimmyBarnes]

I´m asuming that u mean without recompression, then there´s no tool outthere that does that.

Is there one that can do it with compression? As long as the original 6 channel 384 KHz AC3 format is retained.

thanx

JB

[Skelsgard]

There´s a fade-out plugin for BeSweet on the BeSweet website i think.
Or u can do manual fade-out thru transcoding. AC3 to WAV, then fade-out the WAV, then encode back to AC3.

[JimmyBarnes]

There´s a fade-out plugin for BeSweet on the BeSweet website i think.

It's fade in, not fade out


Or u can do manual fade-out thru transcoding. AC3 to WAV, then fade-out the WAV, then encode back to AC3.

AFAIK that only retains 2 channels - the other 4 are lost I presume

JB

[Skelsgard]

Not at all. If u open a 6ch WAV with Audition, it separates the file into 6 mono streams, u can aplly a fade to each, then save each with the proper name according to their postion in the 5.1 mapping, then load them into a Dolby encoder, and done.

[JimmyBarnes]

Not at all. If u open a 6ch WAV with Audition, it separates the file into 6 mono streams, u can aplly a fade to each, then save each with the proper name according to their postion in the 5.1 mapping, then load them into a Dolby encoder, and done.

What do you use to convert AC3 6 channel to 6 channel WAV?

Also, if you simply want to truncate the AC3 stream i.e. cut a few seconds off at the end, how do you do that?

thanx

JB

[Skelsgard]

What do you use to convert AC3 6 channel to 6 channel WAV?
BeSweet. Load the AC3, export it as one 6-ch Wav file or 6 mono wav files. As u prefer.

Also, if you simply want to truncate the AC3 stream i.e. cut a few seconds off at the end, how do you do that?
DelayCut accepts AC3 and DTS streams and can cut them with milisecond precision (i.e. 212.215 second to 245.843 second). But remember that AC3 is packed in 32 ms packets so u should use exact multiples of 32 to get more precision.

[JimmyBarnes]

BeSweet. Load the AC3, export it as one 6-ch Wav file or 6 mono wav files. As u prefer.


DelayCut accepts AC3 and DTS streams and can cut them with milisecond precision (i.e. 212.215 second to 245.843 second). But remember that AC3 is packed in 32 ms packets so u should use exact multiples of 32 to get more precision.

Cool. Thanx for your help

JB