TMPGENC - Motion Search Question ??

[antmills]

Hope someone can offer some advice, I'm encoding a divx file to XVCD and its taking 8 1/2 hours for each 45 min file at 2pass VBR in tmpgenc with motion search set to highest quality(very slow) if I change it to High(slow) the estimated time drops to 4 1/2 hours !! Before I take the plunge and encode them, will I see any difference between these two settings....I've read mixed opinions on here???

Cheers

[dc91gt]

I've never seen a difference between the high setting and the highest setting, cept for what you experienced.. 2x longer encoding times.

-d

[puertorican138]

Motion search precision adjusts how much the encoder searches for motion between different frames. This means it looks at a block in a frame and then looks at the next frame for the same (or similar, depending on other settings) block somewhere else in the picture. If a similarity is found, information on the direction and how much the mpeg block moved between the 2 frames is put into the mpeg stream, so that the block is used
in a different place in frame 2. By doing this the same thing isn't encoded twice. This means that less bits are used when things are repeated. then bits can go to other things like encoding the block better in the 1st frame.

Setting the motion search precision to the highest quality (slowest) setting will make the encoder search really hard for repetition between frames. This makes the picture a lot better when things are moving.

If you encode a video with only small amounts of movement, you can sometimes get away with lower settings to save time, but even in low motion pictures, different parts of the image might be the
same, so I always use the highest setting to give the best picture.

Professional DVD authoring hardware uses extremely sophisticated methods to search for motion, and that's what makes them so expensive, but so high quality.

Hope That Helps!!! :P