@raffriff42 and Warperus : thank you for your very informative answers.
Quote:
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BT.601 color matrix must be used to convert YUV data back to RGB
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That makes sense, but is surprising because these Canon MOV files are HD.
As practical consequences, when editing this kind of footage, am I safe to assume that :
- if I don't resize the video stream, I should convert color matrix to BT.709 (eg. with avisynth ColorMatrix or vapoursynth fmtconv) to ensure that it will be displayed correctly on most players ?
- but in case I downsize from HD to SD, I don't have to apply any color matrix filter, and can just flag the edited stream as BT.601 ?
There is indeed a possibility that these files are incorrectly flagged, as raffriff42 suggests, but it would be a surprizing mistake from Canon, and I'm under the impression that colors were more "right" on my calibrated monitor when displayed as a BT.601 YUV stream than as a BT.709 one... Of course, it's not exact science
