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720p capturing at 59.94 or 29.97?
Hey guys so im digitizing some footage that was shot on the varicam in 720p. I thought they were recording in 29.97, so i captured a few tapes with that in mind. After a few i started to over think and instead of going firewire from my deck to my mac i put it in the aja LH i have to make sure and it says that it was shot at 59.94.. yikes!.. now should i re-digitze the other tapes, its actually quite a few. Does it matteR? im sure it matters somewhat though. its a show that is going to be airing on PBS so going back out im guessing to some sort of tape is proable to going to the deliverable. any ideas? i really dont even get this 59.94 thing if its 720P that seems like it would be an interlaced frame rate not progressive. any thoughts? Let me know if i can just work with the 29.97 and the 59.94 in the same timeline or if thats going to be a problem?
thanks alot!
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5 Replies
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720p is a 59.94 format. You can get 23.98 as well…and if you TRY…29.97. But, mixing the two…depends on how you are delivering.
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
Read my blog, Little Frog in High Def -
i asusme its got to be some sort of tape format.. so ur suggesting i re-capture all the 29.97 footage? correct?
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59.94 is a transport stream for 720p. if they shot 29.97 ( quite likely ) then the format simply doubles every frame. the kona and matrox I/O’s can capture native 29.97 by simply dropping every other frame. this does no harm since its a duplicate frame anyway, and you cut your drive space usage by 1/2.
all the various FPS used by the varicam simply pad extra frames into 59.94. what the camera does is add VITC data to flag the dupe frames, and your capture card ( should ! ) read them, and then only capture the actual unique frames and make native files.
as for delivery, again your card will pad the extra frames if you edit 24/30 FPS. standard procedure, nothing wrong
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hey thanks for the response, im glad i understand the varicam now, a little to late though as i imported everything at 60 (59.94 ) in final cut… do you see any problems with this? we are having some major synch issues though almost like the audio si in front of the video like 8-9 seconds… could this be related… we also get some digitization pops like rainbow colored pixels that happen, there are some tapes that are worse than others and some that are perfect? any ideas? thanks for anyones help
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I never recommend capturing 720 to 29.97. All sorts of issues in the edit.
We’ve been using 720 material going on 5 years now and we always ingest and edit at native 59.94. That’s what the camera shoots, that’s what the VTR in the camera rolls, that what the 1400 deck rolls. Keeps everything simple all around.
As for your sync issues, no clue on that. I’ve never seen anything that far off.
On the bad pixels, I’ve only seen that when capturing to the Apple ProRes HQ codec from DVCPro HD tapes. That’s why we use the regular ProRes codec here.
Walter Biscardi, Jr.
Biscardi Creative Media
HD and SD Production for Broadcast and Independent Productions.STOP STARING AND START GRADING WITH APPLE COLOR Apple Color Training DVD available now!
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