On 27-11-2018 09:17 PM, Gyan Doshi wrote:
On 27-11-2018 08:59 PM, Kieran O Leary wrote:


Can this metadata ever be set at a container level for mov? Must it always
be the stream that holds this info?

The muxer only writes it for MP4s,

The QT spec doesn't accommodate its signaling :


https://developer.apple.com/library/archive/technotes/tn2162/_index.html#//apple_ref/doc/uid/DTS40013070-CH1-TNTAG7

Correction. Meant to quote this,

"The remaining component values (e.g., 1-15 and 241-254 for n=8 bits and 4-63 and 961-1019 for n=10 bits) accommodate occasional filter undershoot and overshoot in image processing. In some applications, these values are used to carry other information (e.g., transparency). The writer of a QuickTime image may use these values and the reader of a QuickTime image must expect these values."

This implies that 'these values' is treated as 'other information' rather than range expansion.


Gyan
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