Direct Stream Copy & Full Processing Mode

[JoNty]

I've just encoded a 25 minute episode of a TV program with VirtualDubMod that I've decrypted from DVD into a DivX, with MP3 audio at 160 kbit j-stereo 44100mhz with the direct stream copy option, and the file size is about 106 MB.

I thought I'd try it but with audio set to full processing mode, but the file size ended up being twice as big.

Anyone know why this is, or why most people think that full processing mode is better? Is it really any better because it increases the file size? Is this because it's decoding the audio into PCM with full processing mode?

[JoNty]

Thought someone would of known.

[Baldrick]

Please wait at least a few days before bumping your post.

You should only use full processing if you want to convert the audio to some other format(and it is also good if you are converting divx with mp3 to mpg cause many encoders may have problem with mp3 audio...). If you choose full processing will virtualdub convert to wav by default. But you can also choose a compression like mp3 and it will reconvert to mp3.

[Laddydaddy]

The full processing mode allows you to use the filters provided by v-dub. It also allows you to compress or decompress audio/video. When you use direct stream copy you are copying the audio/video as is. Filters and compression/decompression functions don't work in v-dub if you choose this function. As far as the file size of your 25 minute TV show increasing to 106MB, you probably had no compression checked in the audio section. The new audio file will of course be larger since it is uncompressed and will thus swell the file size of your video.

[JoNty]

OK. Will remember not to boost my post so quickly next time.

Not a fan of the Fraun codec. Must prefer win32 port of LAME.

Thanks for the help.