tippy top, both of you anons. smart.
I'm late to the party but looks like the good bread is back!
'FFMPEG: IMAGE TO WEBM
ffmpeg -framerate 30 -f image2 -i <input.jpg|input.png|etc-c:v libvpx-vp9 -pix_fmt yuva420p output.webm
'FFMPEG: IMAGE TO MP4
ffmpeg -framerate 30 -f image2 -i <input.jpg|input.png|etc-c:v libx264 -pix_fmt yuva420p good-bread-is-back.mp4
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Note: exiftool can still be used to read metadata from the resultant webm || mp4. It can also strip/write tags on the mp4 but does not yet support writing to webm. Without striping the metadata, one can observe the muxer/encoder and its' version.
exiftool -all= -overwrite_original good-bread-is-back.mp4