On Tue, 27 Nov 2018, 15:56 Gyan Doshi <gyando...@gmail.com wrote: > 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. >
This is wonderful. No wonder I could find no information in the atom description regarding these values! I thought that the colr atom would be where it was stored. Thanks Gyan, Kieran O'Leary Irish Film Institute _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
