MPEG2 Data Rate

Ron Lucas wrote on 5/14/2002, 8:47 AM

After I render my AVI to MPEG2 using the NTSC DV preset, during the scenes where a camera flash goes off, there is noticable quality loss immediately following the flash. This quality loss is not present in the AVI file. It is only noticable on the MPEG2 file.

I noticed the maximum data rate for the MPEG2 NTSC DV preset is around 8M. I'd like to bump this up to 9.6M to help correct this issue.

I've read that the industry standard for DVD is not to exceed 9.8M data rate. If my make my MPEG2 file max out at 9.6M, will some DVD players struggle to play my video?

Or, does anyone have any suggestions on an MPEG2 setting I can adjust to help correct the quality loss I get during camera flash scenes?

Thanks,
Ron

Comments

SonyEPM wrote on 5/14/2002, 10:12 AM

are you using VBR or CBR?

Ron Lucas wrote on 5/14/2002, 10:55 AM

I believe VBR. Isn't that the default setting for the MPEG2 NTSC DV preset? If so, I've changed the default values from:

Max 8,000,000
Ave 4,200,000
Min 192,000

to

Max 9,600,000
Ave 4,200,00
Min 192,000

I'm not in front of VV30a right now, so my terms and values mentioned above may be a bit off.

Thanks,
Ron

SonyEPM wrote on 5/14/2002, 11:16 AM

Try this (bumping up the average bitrate):

Max 8,000,000
Ave 6,000,00
Min 192,000

Ron Lucas wrote on 5/14/2002, 11:27 AM

I'll try that tonight.

Thanks,
Ron

jgourd wrote on 5/14/2002, 6:37 PM

If I do this, How can I predict the resulting file size? Obvously I want my projects to fill up a whole DVD.

Cheesehole wrote on 5/14/2002, 7:47 PM

this might help:
bitrate formula page