Stephen Mann
Forum Replies Created
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You should always use the best resolution available to you at every stage of the workflow.
In your case, you should be shooting in HD, editing in HD and only converting to SD when you encode the DVD files (MPG and AC3) in Vegas.
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
What is the source of the video and what are your render-to parameters? Also, **where** are you seeing this result? In the preview screen, in the encoded DVD, on the theater screen?
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
I seem to recall somewhere that there is a minimum file size for blu-ray. Try adding ten minutes of generated media (black will do) to the video and see if that works.
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
“I’ve seen people meticulously ride the volume when all they needed to do was engage the track compressor.”
You must have seen some of my early work.
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
It doesn’t matter if you are using VBR or CBR, the size of the encoded file is solely dependent on the encoded bit rate. You have full control of that in Vegas, but not in DVDA. This is the main reason for doing your MPEG encode in Vegas.
You adjust the bit rate to encode as close to 4.7GB in file size as you can – but never exceed 8Mbps since many players have problems above that. (The spec says 9Mbps, but that’s what glass-mastered DVD’s aim for). Google “bit rate calculator” to get your starting parameters. Yes, starting parameters. No program can precisely predict the encoding parameters without actually encoding the file. It can only make estimates based on the most determinate factors of length, type of audio and any extra folders. If your video has a frequently-changing background, like people moving, trees moving, camera shaking, then the encoder won’t be too efficient, will make a lot of i-frames, and make a lower-quality encode for a given target file size. If you shot for encoding, have a stable background, minimize movement of your subjects, then the encoder gets more efficient and can cram more more video data into the same 4.7Gb container. Also, different CODECS will encode differently. In fact, the same CODEC won’t encode exactly the same every time.
Now, I’ve forgotten the question…
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
If multiple formats bogs down your computer, then you need a new computer.
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
I haven’t seen buffer underflow since we were burning data CD’s in the early ’80’s using a ‘486 PC running 200 MHz.
The disc must be written in one complete burn cycle. If the computer can’t supply the data fast enough for the DVD burner to have a constant supply of data, (I.E. the buffer goes empty) you will get the “buffer underflow” error.
Is the data to be burned on a network drive?
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
You have two problems here. The Sony HDR-CX350V id shooting HD in the AVCHD format – a very highly compressed format. Most of us can’t afford the camera or disk storage needed for uncompressed HD. Second, DVD is SD. Period. You have to recompress your HD to SD in order to make a DVD. Or, are you trying to make Blu-Ray Discs? Or are you shooting in SD?
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
It might be tough since the dino is shades of gray and the background is black. First, you have to get the video of the dino onto the Vegas timeline. How were you going to do that? Next, you can try what’s often called “difference keying”. I’ve never done it, but if you search this forum you should be able to find relevant posts.
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
Running it through Cineform Neoscene seems to put those sort of sound meter bars on the side.
That’s it!
It’s a CineForm problem. From their tech support:
“i heard back from engineers about the vegas playback issue. i’m told that it only happens on quarter res HD or half res SD files. Sinces its just a preview only issue in Vegas, it has not been prioritized on our fix it list… it will get addressed at some point though. for now, switch to full res to see the correct image.”
I just stopped using Cineform…..
Steve Mann
MannMade Digital Video
http://www.mmdv.com