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GRAB FRAME vs Photoshop import…
I just done a test grabbing the same frame off digibeta via Decklink Pro (SDI) – one using the ‘photoshop BMD import’ and one using ‘grab frame’ within Deck Control….
The colour and saturation results are VERY different!?! After checking them against my SDI Clipstation results the photoshop import one looks the same, so I presume that is the ‘CORRECT’ one…But which should I trust?
Also, and my niavity will show again now…but does DigiBeta contain 10bit video data or 8bit? We’ve always grabbed digi footage via 8bit with our Editbox/AVID/Clipstation, but I was keen to see the results of the BMD capturing via 10bit…the 10bit frame looked like the 8bit ‘grab frame’ only more washed out and brighter.
Any thoughts BMD moguls?
Thanks in advance.
*AE 5.5 Pro – *PS CS1 – *Combustion 3
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Win XP Pro SP2 / Intel P4 3GHz / 2GB RAM / GeForce FX5200 / BMD DeckLink Pro / Sony BVM-20G1E / DVS SDI Clipstation -
3 Replies
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Hi,
Deck Control is using QuickTime to perform the capture to a Photoshop file whereas the plug-in in Photoshop is just taking a raw data capture from the deck. However I would expect the captured file to look the same so we’ll try to test this out soon and get back to you. Meanwhile I would suggest using the Photoshop plug-in.
Yes, Digibeta really is 10-bit 4:2:2.
Regards,
Luke Maslen
Blackmagic Design -
Thanks Luke,
I’ll use the PS capture for now, but let me know what you find..
Also might be worth mentioning grabbing via PS whilst Deck Control is in 10bit mode won’t make any difference to the quality of the image will it? I can’t see any. Though, like I said 10bit grabbed via Deck Control looks alot diff to 8bit w/Deck Control. Both look washed out and yellow compared to the raw data from PS though. For reference I have Deck Control set to BMD compression in both 8 and 10bit modes.
*AE 5.5 Pro – *PS CS1 – *Combustion 3
————————————-
Win XP Pro SP2 / Intel P4 3GHz / 2GB RAM / GeForce FX5200 / BMD DeckLink Pro / Sony BVM-20G1E / DVS SDI Clipstation -
One other thing I have noticed is that when I compare an uncompressed AVI of the same bit of footage that has been rendered out of AE using BMD 8bit codec, the colours are DRASTICALLY different. Similar to the difference I saw with Photoshop import vs. Grab frame with stills.
The same goes for footage captured uncomp’d AVI via Clipstation or VT toaster board compared to the same digibeta footage captured using the BMD codec via Deck Control. The only time I see no difference in colour is using the PS import. That’s fine as long as it’s stills, but as the Deck Control app doesn’t support AVI or Targa sequences I am a bit stuck if I need to grab in footage.
Is this normal?
*AE 5.5 Pro – *PS CS1 – *Combustion 3
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Win XP Pro SP2 / Intel P4 3GHz / 2GB RAM / GeForce FX5200 / BMD DeckLink Pro / Sony BVM-20G1E / DVS SDI Clipstation
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