On 12/30/2015 05:47 AM, Mats Peterson wrote:
The original .mov file has the grayscale bit set in the bit depth field
of the video sample description, but since that seemed highly illogical
to me, I cleared it for the purposes of this demonstration. For some
reason, QuickTime in Win or Mac seems to ignore the grayscale bit, since
it will display the file in blue colors regardless. Perhaps we should do
the same? This is not documented behaviour, though.
Mats
The QuickTime File Format Specification says this:
"Values of 34, 36, and 40 indicate 2-, 4-, and 8-bit grayscale,
respectively, for grayscale images."
They don't mention anything about value 33 (0x21), which is 1-bit video
(0x01) with the grayscale bit (0x20) set. Perhaps we should just ignore
the grayscale bit when processing 1-bit video then? Suggestions welcome.
Mats
--
Mats Peterson
http://matsp888.no-ip.org/~mats/
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
