Different Processing Modes

[Mac Sidewinder]

I have googled and search the forum but to no avail. When do you use the different processing modes in vdub (full, fast recompress, normal recompress)? I know that when you edit video, join audio and video, etc you can use direct stream copy, but when do you need to use the other modes?

Mac

[Manao]

Full recompress is useful only if you want to use VDub's filter. It converts the video stream in RGB, then makes the video pass through the filters then gives the filtered video to the codec.

Fast recompress does'nt convert to RGB, and let the video stream in its original colorspace. Thus, it doesn't allow the use of VDub'd filters, but it's faster since there are no conversion during the preprocessing.

Both are aimed for the use of a codec to (re)compress the video stream.

[Soulhunter]

Is there also a significant difference between the normal and the fast mode... ???

Bye

[Mac Sidewinder]

That is a good question Soulhunter, I would also like to know that if you set a offset in the audio interleaving section, such as -200ms, and then use the save wave function, does the audio file get offset by the 200ms? Or does this only affect when you mux a video and audio file together?

Mac

[Belgabor]

Originally posted by Soulhunter
Is there also a significant difference between the normal and the fast mode... ???

Bye

Kinda. Fast technically speaking just sticks the input and the output codec together. Normal puts vdub(mod) inbetween (and probably transiently converts to RGB32). Normal was introduced because some buggy codecs/codec combinations don't (or didn't) take well to fast.
As far as I know nowadays Normal is kinda useless.

[Suiryc]

Originally posted by Mac Sidewinder
That is a good question Soulhunter, I would also like to know that if you set a offset in the audio interleaving section, such as -200ms, and then use the save wave function, does the audio file get offset by the 200ms? Or does this only affect when you mux a video and audio file together?

Mac
If I recall correctly the offset is also applied when Saving to WAV or demuxing.