This guy did it with imagmagick and avconv: https://askubuntu.com/questions/293444/how-can-i-quickly-convert-a-gif-file-to-a-video but looks like you'd use gifcicle to make an animated gif first: https://www.maketecheasier.com/create-gifs-command-tool-ubuntu/
On Wed, Oct 30, 2024 at 8:49 PM King Beowulf <[email protected]> wrote: > On 10/24/24 12:42, American Citizen wrote: > > A follow up here. > > > > The "-crf 0" setting for ffmpeg has to be used to insure the highest > > image quality when converting from one format (animated gif) to another > > Mastroka .mkv. > > > > The video size dropped to about 1/2 the original animated gif size. > > > > The ffmpeg defaults don't seem to handle the 800x800 animated gif files > > very well, much image degradation is visible, when doing the conversion > > to mp4 format. > > > > ffmpeg does a better job on the 1000x1000 pixel animated gif files for > > some reason. > > > > But forcing the video quality with the crf option = 0, is the correct > > way to preserve image quality. > > With mp4 are you using H.264 codec (libx264)? The defaults for mkv and > mp4 may not be optimal. You may also need to adjust the bitrate or do > so via crf: > > -b:v 0 -crf 0 > > Specify a better pixel format > > -pix_fmt yuv420p > -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" > > (second option IIRC sets x,y dimension divisible by 2 for H.264 and > yuv420p) > > mkv is also a container, not a codec, so you'll need to specify H.264 or > whatever and play with the various codec options, since the defaults > chosen for you may not be appropriate for animated gif. > > https://en.wikipedia.org/wiki/Comparison_of_video_container_formats > > maybe something like: > > ffmpeg -i 20242952110-20242960240-ABI-EP122024-GEOCOLOR-1000x1000.gif > -c:v libx264 -b:v 0 -crf 0 -pix_fmt yuv420p -vf > "scale=trunc(iw/2)*2:trunc(ih/2)*2" output.mkv > > > -Ed > > >
