Quick question about demuxing ac3 to wav

[jellysandwich]

This is a lossless process and thus doesn't reduce quality in any way, correct?

js

[Guest]

You mean "decoding" to WAV. Yes, decoding (decompressing) is lossless.

[jellysandwich]

Woops, yea, I meant decoding.

Another quick question: what happens if you try to decode the track a very long movie (ie, LotR: RotK)? I remember reading about a 2gb limit on wav files...

js

[Guest]

I remember reading about a 2gb limit on wav files... That's a very good point. DGIndex could write multiple files all <= 2GB, instead of just failing, as I guess it would right now. Then the user could rejoin them as required during processing.

But if it was me, I would just leave it as AC3 or decode it externally.

[squid_80]

If dgindex put a wav header on the ac3 stream, you could load it into virtualdub using ac3acm as the decompressor and compress video and audio at the same time. Or just use direct stream copy to mux the ac3 directly.