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Pro Res HQ on XDCAM timeline Export to QT sync error
Has anyone else noticed a possible bug with using ProRes HQ clips in an XDCAM timeline?
Situation: 1080p /30 using XDCAM EX timeline and 1080p/30 ProRes HQ clips (digitized through Multibridge Pro)
Here’s the problem: When editing and playing back the timeline, the cuts look fine, but when exporting to a Quicktime (using current settings & self-contained), a few ProRes clips playback at a much faster speed and, obviously, out-of-sync.
All the media parameters match (except, of course, data rates & codecs). The frame rate, frame size, bit rate, timecode type, field dominance, aspect, everything that should matter. The real funky thing is that when a “bad” clip is replaced, the next clip (on the timeline) from the same master clip gets out-of-sync, where it may have exported fine the first time.
Here’s a few seconds of an export:
https://www.dingodigital.net/clients/XDCAMProRestest13.mov
My workaround was to re-ingest the footage via the Multibridge and hope it didn’t have the same errors, which it fortunately, did not. It just took all day since the footage was from various sources.
Primary System Info –
Mac Pro 2×3.2 Quadcore – 10.6.2 – QT 7.6.3 – 20 GB RAM – nvidia8800GT – SATA internal & external storage – Blackmagic Multibridge Pro – Open GL 1.5.10 – Wacom Intous2 tablet – AJA io -
2 Replies
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Don’t use an XDCAM sequence. Adding non-XDCAM (non-GOP) formats to this and then RENDERING to that format…ugh. Tried this once and had nothing but trouble.
Make a ProRes sequence…use that. XDCAM in a ProREs sequence is a GOOD thing. And the ohter ProRes footage will work (as that is the native format of that footage), and if you needed to add other footage…it’ll be better too.
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
Read my blog, Little Frog in High Def -
Thanks Shane,
I tried same clips in the ProRes sequence but I got the same sync error on export. I think the captures of those clips are corrupt – I just don’t know what, other than some hidden metadata, might be telling it to speed up. The clips also go out of sync if I just force render the timeline, so at least that is consistent.I think I’ll stay in the ProResHQ timeline though, it’s less flaky than using XDCAM.
Primary System Info –
Mac Pro 2×3.2 Quadcore – 10.6.2 – QT 7.6.3 – 20 GB RAM – nvidia8800GT – SATA internal & external storage – Blackmagic Multibridge Pro – Open GL 1.5.10 – Wacom Intous2 tablet – AJA io
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