Simple question about video bitrate when making a dvd

fyodor1917

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Jun 21, 2013
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If my starting video is a ~3mbps MKV and I'm using it to make a dvd Is there any point in selecting a higher bit rate than the original file? Or will I get a better quality end result if I do?
 

SchizTech

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Jan 16, 2011
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You can't convert a file to higher quality than the original. The system can encode at higher bitrates or whatnot but that's just extrapolation; to get higher quality the computer would have to effectively produce data where none exists.
 

fyodor1917

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Jun 21, 2013
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Sorry I'm not asking if I can get better quality than the original. I'm asking if choosing a higher bitrate than the original will will help to maintain quality. When I use an MKV to make a dvd the dvd authoring software lets me select the bitrate for the output which is always an Mpeg 2 (.vob) I believe. So basically is an mpeg2 @ 3.5Mbps or an Mpeg 2 @ 8Mbps going to look the same compared to the original MKV @ 3.5Mbps?
Is that clearer?
 

kenrivers

Splendid
Moderator
In part the bitrate will be determined by the length of the video. The longer the video the lower the bitrate you will need to use to make it fit on a standard DVD. If you have spare DVDs try burning one at a lower bitrate and one at a higher bitrate and see if you can tell a difference during playback. Do you have the option to use VBR (variable bitrate)? When you create the DVD do you use one pass or two?
This might be helpful. "Bitrate goes by the running time of the video and the size it needs to be to fit the media. That's what bitrate calculators are for: http://www.videohelp.com/tools/sections/bitrate-calculators"
Source: http://forum.videohelp.com/threads/288420-The-Best-Bit-Rate-For-DVD-s
Bitrate calculator: http://dvd-hq.info/bitrate_calculator.php?length=90&vformat=NTSC&audiobr=1536&astreams=2&ratemode=Auto&motion=Heavy&scenedetect=Active&brlimit=9800&discsize=8147&otherassets=0#Calculator
http://answers.yahoo.com/question/index?qid=20070916054415AAIGENP
 
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