John Rofrano
3
COW Coins
Forum Replies Created
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> I’m trying to come to a definitive decision about rendering templates for lossless 1080 & 720 HD output, for use at trade shows etc.
I don’t think you really mean lossless because that would require uncompressed HD video would would be an extremely large amount of data. I believe you mean “best quality possible”.
> Does anyone know if there VBR or CBR is best in terms of absolute quality.
VBR has the potential to yield better quality for the same amount of bits. CBR will give the best quality at max bitrates.
To understand why this is, first you have to understand what they both mean because absolute quality depends on bitrate:
Variable Bit Rate means that you can vary the amount of bits used to represent a frame so that the overall average amount of bits-per-frame is achieved. It does this by stealing bits from frames with less information to encode (that don’t need them) and giving them to frames that have more information to encode (and does need them).
Constant Bit Rate means that each frame uses the same amount of bits regardless of whether it needs them or not.
If you encode a video at 6Mbit CBR and 6Mbit VBR the VBR can have better quality. This is because it will vary the bitrate perhaps giving some frames as much as 8 or 9Mbit while others only 3 or 4Mbit but in the end it will average out to 6Mbit. CBR, on the other hand, will never give any frame more that 6Mbit. If there are frames that need more than 6Mbit to encode, CBR will look worse than VBR.
Having said that… if you are making DVD’s and the DVD spec says that 9Mbit is the highest bitrate you can use, then a CBR 9Mbit is the best quality you can get because each frame will use all 9Mbit. So if your project will fit on the media at the max bitrate then CBR will give you the best quality. If it won’t VBR 2-Pass should yield better results at the same bitrate.
BTW, VBR 2-Pass is a method of making 2 complete scans of the media, once to calculate the bits needed for each frame, then formulate a budget for where to best spend the bits, then a second pass to actually do the encoding. It takes some of the guess work out of budgeting bits which could make VBR 1-Pass look worse than CBR if bits are not allocated efficiently.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Are you using the 64-bit version of Vegas Pro 9.0 and do you have the 64-bit version of Quicktime installed? Did you render to a resolution that the codec supports? A mov file is just a container. You can use any codec in it. What codec did you use?
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Yea, you have to realize that they increased the list print of Vegas Pro this time so it’s probably a percentage of list which would make the upgrade cost more this time around.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
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How are you switching tracks? It sounds like you have 16:9 media below the 4:3 (standard size) media. Just remove the media on the track below it and it will not show through. Alternately, make the 4:3 media the bottom track so nothing is below it. You can also add black (or any other color) generated media below the 4:3 track to show though as the bars. Finally you can eliminate the bars by going into Pan/Crop for that event and right-clicking on the frame and select Match Output Aspect. This will crop top and bottom to make the sides match the 16:9 aspect of your project. Any one of these will fix your problem.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Thanks Mike. It was the corner cell that threw me. I just followed your instructions and it worked perfectly.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Open the file in Quicktime and type Ctrl+I to show the Movie Inspector. This window will tell you what codec you need. If it’s a codec that only ships with FCP on the Mac you are out of luck. If not, buy/download whatever codec it needs for Quicktime.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Hi Allen, When you make your post, there is an icon above the edit box with a blue ‘L’ that is underlined. That will make a hyper-link from the selected text. So in your previous post, you could have typed VASST Upshift, then highlighted it and pressed L and then replace the part that’s between the single quotes in href=’xxxxx’ with the actual link. This would avoid the long link you posted. 😉
~jr
http://www.johnrofrano.com
http://www.vasst.com -
I’m not sure what you mean by “skipping or cracking”. Is it dropping frames during capture? Is your hard drive getting full? Have you defragmented it lately? Did you install any new software that might load in the background and interrupt the capture? Any and all of these can cause dropped frames.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
I don’t know of any way to copy and paste markers between projects. I thought maybe there was a way to copy and paste via Edit Details but I can’t seem to get to to work. It will copy but not paste. 🙁
You can do it with a script tool like VASST Ultimate S Pro. It allows you to save markers to a file and then restore them from a file which would allow you to restore them in all the other projects easily.
~jr
http://www.johnrofrano.com
http://www.vasst.com