gifski: update to 1.5.1

[cinerea0]

General

• This is a new package and it conforms to the quality requirements

Have the results of the proposed changes been tested?

• I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
• I generally don't use the affected packages but briefly tested this PR

[zdykstra]

I tested this on x86_64/glibc, and like 1.4.3 it's missing the ability to directly convert a video into a gif.

$ gifski --fps 10 -o ~/tmp/doot.gif ~/Downloads/tz56y1O.mp4
error: Video support is permanently disabled in this executable.

To enable video decoding you need to recompile gifski from source with:
cargo build --release --features=video
or
cargo install gifski --features=video

Alternatively, use ffmpeg command to export PNG frames, and then specify
the PNG files as input for this executable. Instructions on https://gif.ski

Running my video through ffmpeg first and then converting the output PNGs to a GIF seems to work, though.

$ gifski --version
gifski 1.5.1

$ ffmpeg -i tz56y1O.mp4 frame%04d.png
....
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tz56y1O.mp4':
...
Output #0, image2, to 'frame%04d.png':
frame=   30 fps=0.0 q=-0.0 Lsize=N/A time=00:00:03.00 bitrate=N/A speed=58.4x
video:4134kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

$ gifski -o doot.gif frame*.png
gifski created /home/zdykstra/Downloads/test/doot.gif

$ webify -p doot.gif
https://pastebin.stratumzero.date/u/p/2142e388af/doot.gif

[cinerea0]

@zdykstra Yeah, that second way is how I tested it. Would you like me to try compiling it with the --features=video flag and testing that?

[ericonr]

#28506 for discussion on the ffmpeg stuff