-
Notifications
You must be signed in to change notification settings - Fork 0
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Mandating colr
for all video codecs
#43
Comments
The suggestion is ok. We should implement in an amendment. |
We will add this to the TuC |
@haudiobe I don't this item in the TuC from the October meeting https://dms.mpeg.expert/doc_end_user/documents/144_Hannover/wg11/MDS23186_WG03_N01033.zip |
@cconcolato how about PixelAspectRatioBox? the same applies for it, no? |
This one is addressed at MPEG 145 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
The current specification mandates the use of the
colr
box (see excerpts below) but only for NALU-based formats. The group should consider mandating it for all video codecs so that downstream specifications (e.g. AV1-ISOBMFF) does not have to. Alternatively, CMAF should provide guidelines to derived specifications, e.g. provide a list of restrictions that only apply to NALU formats that other codecs may include in their CMAF-based specifications. There is already section "12.1.3.3 Video image coding characteristics" which indicates how CMAF Media Profiles should indicate constraints on colour in the bitstream, but it does not mention structural file format constraints.B.2.3 Visual sample entry (HEVC)
9.3.2.2 Sample Description Box (NALU-specific)
Note that in
ColourInformationBox
is spelled with the British English way in ISOBMFF. CMAF should probably be harmonized (color vs colour)The text was updated successfully, but these errors were encountered: