Background color of MP4 rendering incorrectly in QuickTime I am converting a .MOV file into .MP4, .OGV and .WEBM for web use. I have found that the background rendered by QuickTime and Safari is not white although the same MP4 has a white background when viewed with Windows Media Player.

The video is compressed using http://www.mirovideoconverter.com/ which uses ffmpeg (conversion parameters used are listed https://develop.participatoryculture.org/index.php/ConversionMatrix#Output_Formats)

Can anyone tell me why this is and how I would correct the output for QuickTime?
it is a problem with  gamma settings youre using and QT has its own gamma settings, dont bother. it will display only in QT that way...

also check for alphas, but im not so sure that mp4 can support alpha channels... only qt mov with animation codec has alpha.... as i know...