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decklink 1080i playout and downconvert to PAL – BLACK FRAMES and GLITCHES
Big problems here.
HD to SD downconvert to tape. Easysetup HD1080i 50
I have a film 1.5 hours long. When I play it on the timeline it appears to be playing fine on the computer monitor. (hard to tell if it stuutters on the cinema display.
When I try to master it to tape I get black drop out and black frames. The TC also slips and audio drops out.
The errors occur every 1 to 2 minutes and are intermittent. When I play that part again the errors or on different frames.
I have closed down the videomonitoring window and the desktop mirroring.
When I try to render out the movie the file has dropout rendered into it! So I can’t even do the playout from a single qt file!
Any clever ideas appreciated.
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5 Replies
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Dr.,
Not enough info provided, though it sounds like you’re dropping frames. . Is this uncompressed HD? What type of drive array do you have? Provide more details and I’m sure we’ll be able to help you.
DRW
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The system is a QuadG5 with 2GB RAM. The raid is a 5TB Eonstor. Via ATTO SCSI.
The decklink is connected to a DVW2000P Digibeta Deck. With SDI returning to the Decklink and RS422 control.
The sequence is 1.5 hours long! it is mostly 1 track with only occasional dissolves and titles on three tracks. It is colour corrected throughout and the thus the whole track is rendered. there are 4 tracks of audio.
Setting UNCOMPRESSED 10 bit quality 100 48khz 16 bit
Frame size 1920×1080 HDTV 1080i(16:9)Device control HDTV 1080i 50
output setting HDTV 1080i 25Desktop mirroring is off
When I try to edit to tape, after about a minute the break up starts. It struggles on and then crashes the edit to tape.
It seems to play the HD via SDI onto a HD monitor slightly better. But the downconversion keeps failing.I have tried reducing the memory allocation of FCP. I have tried printing small sections of the film.
Many thanks.
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Pete,
Well, it sounds like you have sufficient hardware for sure. Did you try mixdown in the render settings? Thats the only other thing I can think of.
DRW
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It is the same even when delete the audio tracks
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I assume you have the digi beta referenced to the same video ref as the Decklink card.
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