Rendering Time Anomaly

[bass_player]

Scenario: Using VS X2Pro
Two movies about 1hr 25 min each. Made from clips from same camera. Both are 16:9 and DD 5.1 and rendered to .iso file. All rendering is done from the "Share" menu.

The only difference is that one movie (call it B) has had the entire sound track exracted and balanced and equalized with an audio program. The sound track is re-inserted in the music track as a .wav file and all audio in the clips is muted.

Movie A has only a very short (about 5 minutes) .wav file in the music track at the beginning of the film. All clips are left un-muted.

Movie A takes about 3 hours to render. Movie B takes about 12 hours!!!

Does VS X2 just have a problem with the long .wav file, or could there be something else??

[DVDDoug]

Weird! Regular uncompressed WAV files are usually trouble free.

If you have a movie-length 5.1 channel WAV, it can exceed the WAV size spec-limit of 2GB (or 4GB). But, I don't think that would cause it to slow-down rendering... (A movie-length stereo file will be OK, assuming 48kHz, 16-bits.)

[bass_player]

Weird! Regular uncompressed WAV files are usually trouble free.

If you have a movie-length 5.1 channel WAV, it can exceed the WAV size spec-limit of 2GB (or 4GB). But, I don't think that would cause it to slow-down rendering... (A movie-length stereo file will be OK, assuming 48kHz, 16-bits.)

The WAV file is a simple stereo file, but of course the rendering process has to turn it into 5.1 surround. On the other hand, the movie that renders 3X faster also has a stereo track from the camera which is also changed to 5.1.

It is still a mystery. I may try removing the music track from the slow one and see if it renders faster. At least then I could determine if the long music track is the source of the slowdown.

I like using the iso files because ImgBurn will burn AND verify discs from these 1.5 hour video files in about 10 minutes or less.