-
Quicktime – Mac vs. Windows
Hello,
I made 2 Quicktimes with Photo Jpeg 100% quality from the exact same image sequence. One was made on a Mac and on was made on a PC (both are using Quicktime 6.5.2). When I look at the movie on the PC it looks exactly the same, but when I open them on the Mac, the one created on Windows looks darker. This only seems to happen with the Photo Jpeg (and MJpeg) codec. Does anybody know what’s going on? Thank you!-David
-
2 Replies
-
This might give you some insight– Why are my FCP Productions Darker on my clients PC’s?
Inquiring minds…
BryceDon’t worry Mr. B. I have a cunning plan…
PowerBook 1.67 Ghz ATI 9700 128 MB 2 GB
Final Cut Pro HD
DVD Studio Pro 3
Motion -
From a post by Fred P. on the eyeon Software Digital Fusion List at
LAFFEY Computer Imaging Fusion Resources:
“Here is how we are attacking the problem of the gama flag in quicktime movies causing movies made on the pc to look dark when played on macs. After the movie is created, you need to execute the following command from a shell.gsar.exe -sgama -rgggg -o filename.mov
obviously, to do this, you need the gsar program which can be found at https://www.jsifaq.com/subL/tip5800/rh5801.htm
-s is the search flag, so it is searching your movie for the “gama” attribute
-r is the replace flag, so in this example it is replacing gama with gggg which means nothing to quicktime, so in effect it has no effect on the movies gama correction at playback any longer.”Note that the “gama” is not a misspelling. This hack was created by researching QuickTime File Format Specification Documentation
You would think that there would be a Use or Not Use Gamma switch in applications like QuickTime Pro and FCP for export alternatives for cross platform compatibility.
Inquiring minds…
BryceDon’t worry Mr. B. I have a cunning plan…
PowerBook 1.67 Ghz ATI 9700 128 MB 2 GB
Final Cut Pro HD
DVD Studio Pro 3
Motion
Reply to this Discussion! Login or Sign Up