I have a large gif file (100+ MB) and I'd like to convert it to webm to reduce the size of the final file to 10-12 MB. I'm using ffmpeg to do this and it converts the file just fine except the resulting video isn't as crisp as I'd like it to be, the 'pixel art' quality isn't preserved. So I'm wondering if there's a better codec to achieve this quality or should I be using a format other than webm?
Here is the command I am using:
ffmpeg -y -i test.gif -r 16 -c:v libvpx -quality good -cpu-used 0 -b:v 500K -crf 12 -pix_fmt yuv420p -movflags faststart test.webm
I've tried variations of this command to no avail, changing the quality, changing the chroma subsampling. I've also tried webp, which looks better, but doesn't compress the file nearly enough.
Examples of the differences:
Webm:
Gif:
-pix_fmt yuv420p. Try-pix_fmt yuv444pinstead. Don't use both-b:v 500Kand-crf 12. For start, keep only the-crf 12(tuning the bitrate may be more difficult). You may also try libx265 codec (and MKV container).-pix_fmt yuv444pand have had no luck with that. I also reran without specifying the bitrate and with different values for-crfbut the individual pixels still look a bit "fuzzy". libx265 does look a lot better, its not quite up to par with the original gif but I think its acceptable.