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2n 06min DVD – CBR or VBR?
I’m making a 2hr6min DVD, will be usging DVDA.
I made the bitrate calculation using the BitRate calculator.
It’s mainly static photos with a credit roll at the end.To obtain the best quality, which should I use… VBR or CBR?
CheersGilles
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37 Replies
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Gilles, I’d do it as VBR.
Make sure to use Best mode for your render.
I use Mark’s calculator and got the following numbers.
2,672,000 / 4,456,000 / 7,800,000 -
Thanks Mike!
My numbers are slightly lower as I have a menu with music. but very close.Do you always use two-pass? is it worth the extra time?
Gilles
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You’re welcome Gilles. Nothing wrong with your numbers being a bit lower. It’s always better to err on the side of caution. Good luck with the project.
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Fundamentally choosing between CBR and VBR is not about quality. I’ll repeat, choosing is not about quality. It is about making that which is uneccasary to use – CBR – against allowing a render to use a constantly changing rate that adapts on the fly to use a render thats changing according to the “visual noise” being registered. So, the motivation to CHOOSE is not primarily about quality, which in turn to ask which will give the best quality is a question that masks the reasoning behind it. Do you understand? I ask ‘cos it took me years to grasp this truly precise and exact logic.
OK, if you have a lot of motion, complex transitions and anything that has a lot of visual noise AND it is bouncing up against the +120minute DVD limitation, then anything that will assist getting the video to “fit” is a good thing. That’s why I/we choose to use VBR. Again it is not primarily about Quality. Also, not all STB players get to decode easily high, CBR. So, that’s another reason to choose between the 2.
Another invaluable analysis tool is BITRATE VIEWER. Now, on the face of it, this appears to be some what anally retentive, it’s not. What this can do is to identify “peaks” in rates that could choke a player. On at least 3 occasions it has identified to me just where a test DVDA project would stutter or artifact. Knowing where this was happening I could then “hit” the issue with NEAT VIDEO to reduce noise or rethink a transition. Once I had worked on that Region all was well.
So, the motivation to choose between CBR and VBR is primarily NOT about QUALITY. The motivation is more global than that: it could be about a player playing your DVD or not! Don’t forget, all these options had been made available to us mere mortals during the era of converting NOISY VHS tapes to DVD.
Cheers
Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge -
Oh my gosh. I’m going up the mountain to the monastery and ponder this.
Windows 7 Pro64, i7 CPU, 16GB RAM, SSD boot drive, GTX 570 Graphics, Vegas Pro 12
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hi Sir,
My video also 2hour 5minutes.I use Mark’s calculator to set VBR for dvd 4.7 but when i use DVDA 6 for authoring its can fit into dvd 4.7 so i need to compress the file using DVDA.
How to use the Mark’s calculator.Is the any setting to do….
Pls adivice me
Thank You
Thayalan Paramasawam -
Hi Sir,
(Graham Bernard)Another invaluable analysis tool is BITRATE VIEWER
Where can i get this programe,any links
Thank You
Thayalan Paramasawam -
Would you like a road map? Or better I could explain in very fine 4point Ariel, if you would be prefer, it would only be several 100 pages?
I’m so glad you found it so useful, Phil, I’ll try to be more detailed in future.
Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge -
Sure, do a Google search for “BITRATE VIEWER“.
Cheers
Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge -
Thanks guys.
OK, so I rendered in Best quality, using both CBR and VBR.
The rolling credits at the end are not very sharp. Given Graham’s explanation, quality shouldn’t differ, therefor this is OK.But….
What can I do to make the rolling credits crisper?
CheersGilles
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