vdubmod re-enconding audio too slowly... help me fix this...

[CactusMan]

I use vdubmod only to re-encode audio from dual audio avi xvid files... a month ago, using win7 64bit, vdub takes 4 to 5 minutes to re-encode the 2 audios. Lost my HD... re-install win7 64bit... using a newer version of k-lite codec pack... now vdub takes 10, 15 minutes to do a dual audio re-encode. I have a 4 core cpu. Looks like before, the vdub was using more cores and encoding the 2 audios at same time.

Right know, I'm doing a conversion with 2h 57mn dual audio. vdub taked 20 min to do the job.

Just looked in vdubmod settings and found nothing...

Anyone?

[Baldrick]

Reencode to what? mp3? Try install the lame mp3 acm

[CactusMan]

Yes, reencode to mp3, already have lame installed by k-lite codec pack...

[hello_hello]

Are you using variable or constant bitrate encoding? Even when encoding using a constant bitrate, the LAME encoder lets you specify a quality value, which has quite a large effect on encoding time. After encoding a constant bitrate MP3 using foobar2000, MediaInfo displays this as the encoder settings:

Encoding settings : -m j -V 4 -q 3 -lowpass 17 -b 128

I actually can't remember what they all refer to, but -q3 is the quality setting and it's the default for LAME. Most encoder GUIs seem to use -q2 by default, which in theory should produce better quality, but it's definitely a lot slower even though the bitrate might remain the same.

Encoding settings : -m j -V 4 -q 2 -lowpass 17 -b 128

Not that I know if the quality setting is the problem, but you could probably use MediaInfo to inspect a few old and newly encoded MP3s to see if there's different encoder settings being used.

If you do a lot of audio encoding, foobar2000 might be worth a look. It'll play and encode the first audio stream in AVI/MKV/MP4 files (you need to demux additional streams in order to convert them) but foobar2000 can load a whole bunch of files into a playlist where you can highlight them all and use it's convert function, in which case it'll convert as many simultaneously as you have CPU cores until it's done. Or you can convert files to more than one format at a time etc. foobar2000 requires you to download some encoders separately and tell it where to find them the first time you want to use them, and it requires plugins for decoding some formats which can be found on the foobar2000 site. Once you get it set up you can save conversion presets which you just access from the right click menu. They make converting nice and easy if it's something you do regularly. And of course foobar2000 is a really good audio player.....