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Old June 21st, 2005, 05:34 PM   #1
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Higest bit rate for DVD?

What's the highest constant bit rate I can render/use? I have a very short program (15 min) to burn to DVD and would like to use the available space for maxium quality. (rendering main concept mpg2)

Or bertter phrased -- what's the higest constant bit rate a consumer DVD player can play back?

thanks --

Am I correct in assuming that a (high) constant bit rate will give better results than a variable rate -- since I have the extra space on the DVD?
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Old June 21st, 2005, 06:48 PM   #2
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I believe that the combined bitrate of the video and all audio streams associated with it can't exceed 9800kbps according to the DVD spec. Because players vary, a good maximum target could be 8000 or so.

Keep in mind this is video and audio. If you AC-3 encode you'll have more space for video.

Cheers,

-Matt
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Old June 21st, 2005, 08:10 PM   #3
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We use 9800kbps regularly and have never seen or heard of a problem on any player.
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Old June 21st, 2005, 08:28 PM   #4
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"Or bertter phrased -- what's the higest constant bit rate a consumer DVD player can play back?"

8000 is a safe and a good bet for decent quality.

as for players playing 9800 constant without a problem, im yet to see this, from high end to low end players. Ive tested on numerous players and each different model performs differently.
For best compatibility, use a figure which will give the player enough headroom to buffer the files before playback. some old players cant even play 8000 so thats another thing to consider..
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Old June 21st, 2005, 09:42 PM   #5
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thanks guys --
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Old July 2nd, 2005, 08:41 AM   #6
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What model dvd burner and media combination are you using for your 9800kbps recording?
I often send dvd's to friends who can't play the whole dvd without skipping or errors unless I keep the rate between 6-7500. I am using ac3 audio.
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Old July 2nd, 2005, 09:41 AM   #7
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Jeff, I think you're doing the right thing. Getting too close to the maximum is asking for problems on many DVD players.
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Old July 2nd, 2005, 09:51 AM   #8
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That's why my vote goes to variable bit rate as opposed to constant. That way, a good multipass encoder can have room to bump up the data rate momentarily to maintain higher visual quality.

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Old July 2nd, 2005, 12:27 PM   #9
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Yes, 2-pass VBR 4 min, 7 avg, 8 max seems to yield very playable DVDs for me at very high mpeg2 quality. Works well with HDV footage conversions as well. Encoder quality set to best.
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