Hi All,
I'm working on a project with multiple sources and need to get the colour handling right. From some devices I have clips in multiple formats, e.g. some Nokia N8 AVC clips are 640x480 and others are 1280x720. Not having found any specifications on the matter, the question is whether the manufacturer decided to always use the same coefficients, or to use coefficients according to resolution.
MediaInfo only goes so far as saying YUV 4:2:0. In AvsPmod the SD ones have a tiny bit more contrast and saturation with the preview display set to Rec.601, and likewise for the 1280x720 clips at Rec.709. So it seems the manufacturer uses coefficients according to resolution, but, is there any more scientific or exact way of determining which coefficients a particular clip uses?
Thanks a lot,
Francois
I'm working on a project with multiple sources and need to get the colour handling right. From some devices I have clips in multiple formats, e.g. some Nokia N8 AVC clips are 640x480 and others are 1280x720. Not having found any specifications on the matter, the question is whether the manufacturer decided to always use the same coefficients, or to use coefficients according to resolution.
MediaInfo only goes so far as saying YUV 4:2:0. In AvsPmod the SD ones have a tiny bit more contrast and saturation with the preview display set to Rec.601, and likewise for the 1280x720 clips at Rec.709. So it seems the manufacturer uses coefficients according to resolution, but, is there any more scientific or exact way of determining which coefficients a particular clip uses?
Thanks a lot,
Francois