Ken Hon
Forum Replies Created
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I’ve never heard of that one toke, it’s interesting. What did they make it for?
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Aloha Roman,
Am I correct in understanding that you think that all of the effects are being done in RGB color space versus YUV? And if so, is this conversion the big culprit rather than simple decompression and recompression?
Staying in YUV color space is why we opted to work in uncompressed SDI for SD editing and now it appears that the same thing maybe true for HD.
By the way, your shots are really nice.
Aloha,
Ken
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Aloha Jeremiah,
You gave Chris a lot of good information, but I’m not sure the part about tape speeds is exactly corret.
“As far as 25 mb/sec being the “limit” on mini dv tapes- it’s a function of mini dv tapes. You could run the tape at twice the speed to get a DVCPRO50 signal, or at 4 times the speed to get a DVCPRO HD signal, but dv tape is too flimsy to run at four times speed and be reliable”
It is my understanding that the real problem is the DV codec boards, not the tape speed. I believe Panasonic uses the same physical size tape in a bigger cartridge for DVCPro HD and 50. The DV codec is limited by definition to 25 mbps and these boards were ganged together by Panasonic (and JVC) to deliver higher end formats. DVCPro 50 uses 2 codec boards (and 8 heads like you said) and DVCPro 100 uses 4 codec boards and 16 heads. It’s amazing they can get this to write to such thin tape, JVC used full sized cartridges and head assemblies for D9.
Aloha,
Ken
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It isn’t a function of the NLE. It’s a function of us being brain dead and taking the program sequences from the NLE in DF and the menus out of After Effects in NDF and then combining them in the DVD project. Anyway, the NLE we did this in is Speed Razor which is easy to avoid since they’ve gone belly up. We also have FCP on a Mac, but this project was an ongoing one that we have on a PC.
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The footage was captured as Drop Frame and the Menus were authored as non drop frame. Bill Stephan would know better, but I think it’s no no to mix these in a project. You can use either DF or NDF footage, but not mix the two in a project I think. Anyway, when we changed everything in the NLE to NDF, the DVD worked perfectly. So now we only use NDF video to encode, though you could use all DF as well. I don’t know that this is your problem, but it did create a similar problem with the DVD stuttering on the opening menu and problems accessing the menu buttons.
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One other thing that we found that caused menus to hang was mixing of DF and NDF footage. We had routinely edited in DF, but our menus on our first try came out of After Effects in NDF and it created menus that hung on some DVD players. Luckily we caught this in testing before replication.