Faster 2 Pass Xvid Encodes

[bballing1210]

Hey,

Im wondering if there are apps that improve the 2 pass XviD encoding time from MPEG2 to Avi. My 1 hour videos take 2 hours to encode, so Im wondering if there is a faster way to do this. I use VirtualDubMod as my conversion tool. Thanks.

[redwudz]

The speed of conversion is governed by the codec and it's settings. The program that uses the codec doesn't have much to do with it. They will all basically give you the same speed with the same codec and settings.

[manono]

Hi-

Depends on how you're doing it. Using AviSynth as the frameserver, keeping it in the YV12 colorspace, and using Fast Recompress in VDubMod instead of Full Processing, can speed it up by up to 30% or more when compared to the VFAPI or other methods. Filtering in VDubMod instead of in AviSynth always slows the encoding process.

Also, there are settings in XviD which will slow you down without much quality benefit.

So far you've given next to no information and informed advice can't be given. Depending on your computer speed, settings, resolution and other filtering, 2 hours for 2 pass encoding of a one hour source may not be out of line.

[bballing1210]

Hi-

Depends on how you're doing it. Using AviSynth as the frameserver, keeping it in the YV12 colorspace, and using Fast Recompress in VDubMod instead of Full Processing, can speed it up by up to 30% or more when compared to the VFAPI or other methods. Filtering in VDubMod instead of in AviSynth always slows the encoding process.

Also, there are settings in XviD which will slow you down without much quality benefit.

So far you've given next to no information and informed advice can't be given. Depending on your computer speed, settings, resolution and other filtering, 2 hours for 2 pass encoding of a one hour source may not be out of line.

My specs are pretty good...2 gigs ram, Dual Core AMD Athlon X2 4200+. I capture at 720x480...I usually just use the resize and deinterlace filters. Also, I encode without audio, as I extract the WAV, and then eventually join the audio and video in Nandub.

[jagabo]

If you don't need files of a certain size switch to single pass constant quantizer encoding. Specify whatever quality you want (lower quantizer = higher quality) and encode in a single pass. Every frame will have the quality you specified. That's twice as fast as a 2-pass encode.

In the Xvid configuration dialogs, under Quality Preset, the General Purpose setting will get you 95 percent of what the codec can deliver. Using higher settings will get you a little more quality (VBR), or slightly smaller files size (CQ), but can take several times longer to encode.