More Choppy Video
Posted 24 November 2011 - 04:43 AM
I had come to the conclusion that this is simply to do with the fact that for DVD output so much data gets thrown away that while for most video sequences we don't notice the difference, when we have continuous movement we do notice.
For example: I just redid the video from my son's wedding. The two captured video files (PAL 25fps avi) are 9.5 and 10.2 GB - captured from digital camera using firewire connection. These of course play perfectly smoothly. The ISO files which are what goes to the DVD are 2.8 and 3.4 GB respectively. So 60% of the data is gone. I assume its because sampling rates are different between the two file versions, and its the only way to squeeze an hour of video into 4.7GB.
I would think that if you are processing HD at 60fps then your data loss is going to be even greater.
My second observation is that I did have jumpy video occasionally in my analogue days (on previous long dead PC). I put this down to disk fragmentation and bought an external drive purely for video capture, and formatted it every time before making a capture. Same thing with the drive receiving the rendered data - use a dedicated drive and always format it first. That way you get a continuous write and a continuous read-back.
Glad to hear what others think on this. I sure would like a good solution.
Dell Dimension 5000 WXP SP3
3GB RAM - recently upped from 1GB (making no difference to jumpiness)
Not currently writing to clean formatted drives - maybe I should do a data cleanup on one of my partitions...
Posted 24 November 2011 - 06:49 AM
Some of your 'conclusions' are completly out of whack!
Comparing file sizes is essentually meaningless
I can capture a file, as you have done, in many different formats yeilding sizes from 3.45 to 12.8 GB/Hr for DVD, up to 96 GB/Hr for HD...
So if I capture a camcorder tape that was recorded at LP, my 96 GB "file" won't be any better than if I captured it a lowest quality setting available...
VHS tape can NEVER be made better than what it was and it was pretty low at the time!
But if you are working with DV Camcorders, then you cannot expect to exceed DVD quality based on how you capture.
But what we have seen is Hardware vs. Software rendering can make BIG differences! Software producing better results but taking a little longer
Another factor is changing formats... For example if you record using an NTSC camcorder but output a DVD in PAL, it might not come out as well as it would have if you used PAL - PAL.
Obviously you are having some problems and we would be happy to try to help you with them
Posted 27 November 2011 - 12:08 PM
Thanks for your comments Jim. I'm trying out some of the suggested improved techniques so when I've run my tests I'll respond. It'll be a day or two before I have any results. If need be I'll upload some samples.
Posted 29 November 2011 - 02:11 PM
Jim. Tests run in environment recommended to Mark in first "Choppy Panning" topic: reboot with all startups disabled, internet & virus checker disabled, avoid fit to disk, increased processing priority of Videowave, clean disks - I just went and bought 2 big flashdrives instead of defragging disks.
First test was hardware rendered with reduced hardware acceleration (set via Control Panel> Display> settings> advanced > Troubleshoot) - this gave smoother but not perfect results.
Second test was software rendered and made me smile - beautiful smooth panning just like you said.
Third test was hardware rendered with further reduced hardware acceleration - but I forgot to raise the processing priority of VW so really I should rerun because results were as bad as ever.
Last test will be to use downloaded trial of Adobe Premiere elements 10. (But you won't want to know that.. Basically I'm trying to choose between upgrade to EMC or flip back to Premiere).
Posted 29 November 2011 - 04:25 PM
Also, as Jim asked - how long IN TIME are the videos?
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Posted 30 November 2011 - 04:39 AM
If Software Render cures it, it generally points to the Video Card. Update Drivers & Software from your cards site:
I have revisited other software lately, including Elements... I was amazed how LONG it takes them to accomplish the same thing that Roxio does. Generally 2 to 4 times longer even with the allegedly faster 64 bit which Roxio is not
Try it and see. Only took One Render for me to uninstall it
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