[FFmpeg-user] Converting 16-bit TIFFs to Quicktime Motion-JPEG
Carl Eugen Hoyos
cehoyos at ag.or.at
Wed Feb 29 10:51:13 CET 2012
Jeremy Oddo <joddo <at> jerfu.com> writes:
> > > Does ffmpeg support 16-bit TIFFs?
I only realize now that "16-bit" does not completely describe
the problematic files:
48 bit (non-alpha) tiff is completely supported,
64 bit (with transparency information) support is very limited.
> > You can re-encode them to a very limited list of other formats,
> Do you know where I can find a list of supported output formats?
> How can I tell which format(s) will work?
64 bit tiff can either be little endian or big endian, conversion
is not yet possible, encoding works for the following formats:
libopenjpeg (j2k): native
pam: big endian
png: big endian
(tiff: little endian)
> > Patch very welcome, it is possible that it would not be too difficult
> > (RGB48 is supported).
> My programming chops probably aren't up to snuff. A patch from me
> would be less welcome than you think.
> Are there any other choices that you can think of for converting 16bit TIFFs
> to Quicktime?
Assuming we are talking about 64 bit (and not 48 bit which is supposed
to work fine), I suspect QuickTime does not use the alpha information
anyway and you should be able to use ImageMagick to convert to 48 bit.
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