Encoding in Divx 5.02

[dsenni2000]

I have these 400 mb mpeg's of these 45 minute star trek episodes. I want to make them divx 5 avis so i can fit 2 on a cd. I am opening the files in virtualdub and saving them as divx 5 avis. When i open them and compare it with a divx 3 or 4 version that i encoded earlier, the divx 5 version looks grainy and worse quality. They are both the same bitrate, and in fact i even tried boosting up the bitrate (to like 2000) for the divx 5 and it still had bad quality. Isn't divx 5 supposed to have better quality, or am i doing something wrong?

[KingJohn]

Who said it was better? it may be different

Variable bit rate Mode , 1-pass encoding is similar to DivX 3.11 Alpha's "low motion" encoding, 1-pass quality based encoding is basically constant bit rate encoding (same bit rate used for every frame), and is similar to the compression in MPEG-1 movies (crappy compression).


2-pass is the best encoding option (for smallest file size, and best quality) unfortunately, it takes twice the time of 1-pass encoding, but better results. 2-pass uses the bit rate you selected as appropriately as possible.

Bit rate setting for the video, A setting of 1500 will produce very good quality video (lower will mean a smaller file size, but poorer quality). Don't go below 650 (650-1000 for 1 CD movies), and there is probably not too much point in going over 2000 (1300-2000 for 2 CDs).

Two-pass encoding log files, Log file - 2-pass encoding requires the information in the first pass to be stored in a LOG file - you can specify the location to store the log file by using this option.

DivX 5 adds MV files, which contains Motion Vector data. Having a MV file will speed up the 2-pass encoding process, as motion compensation is performed during the first pass, and will not need to be done on the second pass again.

Use Global Motion Compensation (GMC) is useful in improving the quality of scenes where lots of movement (panning, zooming). You should enable this option.

Use Bidirectional Encoding, allows for the use of B frames in the encoding, in addition to the I-frame (data for this frame is completely stored) and the P-Frame (predicted frame). This option also increases quality, so enable it as well.

-b1 2000 -pre 4 -key 250 -b -g -dr 4,2,2000,10,20 -sc 50 -pq 5

Hope this helps I use 3.11 myself