[FFmpeg-trac] #8644(undetermined:new): Demux multi-image TIFF beyond first image
FFmpeg
trac at avcodec.org
Thu Apr 30 21:25:08 EEST 2020
#8644: Demux multi-image TIFF beyond first image
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Reporter: adaerr | Owner:
Type: enhancement | Status: new
Priority: wish | Component:
| undetermined
Version: git-master | Resolution:
Keywords: tif | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by adaerr):
Thanks for the comment. Although using ImageMagick to pipe the images into
ffmpeg is indeed a workaround I should have mentioned, it works only for
not too large files. The variant I use is
`convert foo.tif ppm:- | ffmpeg -f image2pipe -framerate 15 -i - [...]`
ImageMagick was not designed for processing long image sequences - though
it has some animation support for gif etc - so this is slow and fails for
large files: `convert` loads images into memory (can be extended by use of
tmp dir and tuning magick's configuration to some extent) before
outputting data, so memory usage increases with file size. Note that the
limit file size is a fraction of the available cache size: the internal
representation of images may have 16bit depth per channel, so 8bit gray is
stored as 64bpp RGBA in memory/cache.
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Ticket URL: <https://trac.ffmpeg.org/ticket/8644#comment:3>
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