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May 10th, 2007, 06:30 PM
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#1 |
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Regular Crew
Join Date: Nov 2006
Location: Vienna, Austria
Posts: 51
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720p24 ingest / conversion via streamclip
I´m not sure whether this is the right place to ask but I´ve been having weird problems converting the m2t files captured from the camera (hd110e).
On some shots, especially pans or shots with lots of movement there have been frame drops - not in the original m2t material but in the outputted files (both in apple intermediate and HDV). Whenever it happens I only get an effective frame rate of 12, with every other frame being a duplicate of the previous. has anyone encountered this problem or know what might be the cause? |
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May 10th, 2007, 08:01 PM
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#2 |
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Major Player
Join Date: Apr 2006
Location: United States
Posts: 590
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do you have the frame rate of 23.976 set in the "Frame Rate" window of MPEG Streamclip? That insures proper pulldown.
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May 10th, 2007, 09:18 PM
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#3 | |
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Regular Crew
Join Date: Oct 2006
Location: Knoxville, TN
Posts: 152
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Quote:
Matthew |
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May 11th, 2007, 01:07 AM
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#4 | |
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Major Player
Join Date: Apr 2006
Location: Melbourne, Australia
Posts: 826
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Quote:
For 720p24 conversions I have a policy to only use HDVxDV. It gives 100% accurate frame conversions, but has the drawback of audio drift on longer clips. So I've had to become something of an expert at re-synching dialogue to match the actors' mouths. But at least you can still get out a product that way. Footage with repeat frames, of course, is totally useless. Also, you should know that HDVxDV gives the conversions at exactly 24p (not 23.98). The only perfect and easy workflow I've found (and now use exclusively with all new 720p24 footage) is native HDV 720p24 capture through FCP. I just make sure that I allow at least 10 sec pre-roll and that "FireWire NDF" is set as part of my capturing preferences. I've even worked out a method where I only lose about 2 seconds from the start of each clip (instead of 5-7 seconds). There's a recent post by Tim where he isolate the factors causing variations in capturing success with this camera and FCP. Things such as: the tape you use, how clean your heads are (and whether you've changed the brand of tapes that you use), processor type (G4, G5 or Intel) and speed, amount of RAM, plus the available space in the drives that you are capturing to. I think that if you jockey these factors around, you can increase your FCP capturing efficiency with 720p24 footage. For example, I've had 100% success with capturing my last two 720p24 tapes. I just made sure that I had over 100GB of available space on the external drive that I was capturing to. (I've read that a drive slows down as it fills up with data.) |
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May 14th, 2007, 04:23 AM
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#5 |
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Regular Crew
Join Date: Nov 2006
Location: Vienna, Austria
Posts: 51
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thanks for the info. so far with changing the framerate the amount of duplicate frames has lessened, but it still occurs occasionally in a pretty much random fashion (apart from all sequences being motion-intensive).
unfortunately for the current project capturing via fcp is not an option because most of the segments don´t include enough pre-roll... when capturing a whole tape I´ve managed to reduce the amount of pre-roll final cut automatically deducts to about a second, but it´s still a bit too close for comfort. I know this is a long shot, but is there any way to disable this completely? (I don´t see it as a necessary feature because it´s intended to allow the tape drive to spin up - which is pretty redundant when not capturing single clips) |
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