#DailyBloggingChallenge(268/300)

Not only do #WEBP have the animation halt in the #Fediverse though so do #GIF.

To overcome this issue, one can convert the specific file extension to a MP4.

For GIF one can run via #FFMPEG this

ffmpeg -i input.gif output.mp4

Sadly, currently the same cannot be done with WEBP, since decoding animated WEBP has not yet been implemented.

#DailyBloggingChallenge(269/300)

One option to handle the #WEBP case is to follow this guide. There are some modification that should be taken.

First extract the frames using #imagemagick

magick input.webp frames.png

Then use #FFMPEG to build a MP4 video from the extracted frames

ffmpeg -r 1 -i frames-%0d.png -c:v libx264 output.mp4

#DailyBloggingChallenge(270/300)

The issue with this approach is that when extracting the frames via #ImageMagick one will only get the changes and the rest will be the alpha channel.

Thus when building the MP4 with #FFMPEG won’t look as expected.

One could go back in #Gimp and merge each frame to the base layer (the first frame). Or just use the reference images.

#DailyBloggingChallenge(271/300)

One would have hoped that one came full circle, though one came fully around with less data than before.

Let’s start again from the beginning and use the method described in 265 without using #Gimp. The only thing that is required is that the file names are in consecutive order. This can be done via

ls -1prt | grep -v "/$" | cat -n | while read n f; do mv -n "${f}" "$(printf "%06d" $n).${f#*.}"; done

#DailyBloggingChallenge(272/300)

One nice thing that #Gimp provides is the option to crop all layers at once. This can also be done with #FFMPEG to crop the output.mp4.

Just follow this guide: How can I crop a video with ffmpeg

Gimp or any other image editor app can be used to get a reference area for the crop area.

Hypothetically one combine step 265 and this one in one command.