CD-ROM render settings

snicholshms wrote on 12/25/2002, 10:45 PM

How do I render an AVI or an MPEG file for use in a CD-ROM? Is there one setting that works with both AVI & MPEG 1 & 2? I tried the info in the VV3 manual and the movement was very jerky.
Thanks,
Steve

Comments

musicvid10 wrote on 12/25/2002, 11:51 PM

You can play with different resolutions and data rates, but the standard that works on most cd-roms is VCD. Use the supplied Vegas template or use these settings:
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VCD 2.0 Format NTSC: Resolution 352x240, fixed video bitrate = 1150 kbps mpeg-1, fixed audio bitrate = 224 kbps mpeg-1 layer II, FPS = 29.97
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If the playback is jerky because of your cd-rom, you can always copy the file to your desktop for playback.
MUCH more info is available at www.vcdhelp.com

snicholshms wrote on 12/26/2002, 2:46 PM

Musicvid: Thanks for the info. For playback on a PC, a specific CD-ROM format should be used versus the VCD format. The reason being that a CD-ROM (Non-Interlaced) plays back on a PC screen in better quality than a VCD (Interlaced) which is supposed to be played back on a TV screen through a DVD player. I tried doing the NONE in the interlaced field on a VCD MPEG-1 format and everything came out herky-jerky on PC playback.

Page 301 of the Vegas manual explains that, "interlace can be ignored for video that is going to be played on a computer: choose None (progressive scan).

I am hoping that one of our Forum members has a preset format they use for CD-ROMs that will only be viewed on a PC. This is for business customers that want to advertise with "pocket" or "business card" cds and/or include instruction manuals on a CD.

Steve

musicvid10 wrote on 12/26/2002, 5:46 PM

Interlace is not an issue in one-field vertical render, such as VCD format (240 vertical resolution NTSC), because there is no second field.

I am not sure what the cause of your playback problem is, but it is not interlace, unless you are starting with two-field (480 vertical NTSC analog) captures and also rendering them as two-field. Single-field renders from any source material are not interlaced. Perhaps you are confusing VCD with another format.

In any instance, playing back interlaced material on a PC monitor results in a combing effect noticeable in motion areas, not jerky playback per se, which is often the result of a bus, data rate, or cpu issue. Good luck.

*Appended:* As a test, I just made a VCD from 640x480 MJPEG interlaced source video, and rendered using the VV VCD-NTSC template. Playback is silky smooth from both CD-ROM and desktop, no dropped frames (and no interlace ;). Is DMA enabled on your CD-ROM drive?