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exporting video to 24bit uncompressed avi
A client of ours has an unusual video requirement — to enable playing on a digital display, they need me to supply them with 24 bit uncompressed avi files. I can save MOV files as uncompressed AVI via QuickTime Pro, but they’re 32-bit and won’t play on the display.
How can I convert them down to 24-bit?
They’re video only, no sound. I would prefer a mac solution, but have access to pc’s (vista and xp) if necessary.
thanks in advance!
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11 Replies
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Kevin,
Is really difficult to understand what are you talking about.
The only place I can mentally situate something like “Uncompress 24bits” or “Uncompress 32 bits” is related with some 8b RGB (NONE, Animation,..) with Alpha (32b) or without Alpha (24b).
Open the file with QT and Comm-I to see what codec. Look as well if there say something like “Millions of Colors +”.
If is like that, you need to export the file with the same codec but no Alpha channel.
But think that if this is the case, the problem may not be relate to te Alpha channel, but the codec. You simply can not play it in RT.
Rafael -
I don’t understand it either, but that’s what I have to supply. Nothing else will work.
An example they supplied says (command-i) it’s in ‘WRAW’, 144 x 144, millions which is exactly the same as my avi file, but I’m told mine reads on the system as 32bit, but needs to read as 24bit.
here’s an example they supplied of a “24 bit” uncompressed avi file
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I’ve never heard of that WRAW and I don’t think you can not play that in a Mac.
There are codecs supported by AVI that are not supported in QT.
Try with MPGStreamclip that is good for exporting to AVI.
Rafael -
I’m on a mac (osx 10.5.8) and saved the mov file in QT Pro as an uncompressed avi and the format reads ‘WRAW’, it’s just 32 bit.
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Try knocking the colors down to thousands instead of millions in QT dialog.
Jeremy
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I’ll see if that does the trick, but the sample avi they supplied me was in millions of colours.
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[Kevin Thorne] “but the sample avi they supplied me was in millions of colours.”
Got any better ideas?
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[Kevin Thorne] “I’m on a mac (osx 10.5.8) and saved the mov file in QT Pro as an uncompressed avi”
You saved the file, from where?
How?
What you get when you open the file in QT?
Rafael -
WRAW stands for “Windows RAW”. It is RGB uncompressed codec. Millions+ is 8 bit per R,G and B plus 8 bit for alpha channel. Export “None, Millions”. It should work but QT AVI export module is ancient so it’s probably better to go via MPEG Streamclip. “None” shows in Streamclip settings as “Apple BMP”.
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interesting, thanks. So RGB with no alpha IS 24bit….
I’ve sent a test to the client made using mpeg streamclip and am waiting anxiously for a reply!
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