If that’s the case, can anyone recommend a free (or inexpensive) way to convert MP4 into WebP or something? (I’ve never used a video editor, so I’m completely clueless.)
Tantabus doesn't support MP4 files, right?
Use HandBrake. It’s free and doesn’t have any junk (ads, etc) that a lot of free programs have.
If you need further help, you can try getting in contact with me since I know a decent amount about video/audio formats and converting between them.
I personally use the online tool https://www.freeconvert.com/mp4-to-webm to convert mp4 videos to webm.
I use this Terminal command in Linux Mint Cinnamon:
ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 20 -b:v 0 -c:a libopus output.webmThe breakdown:
input.mp4: Your input file.
output.webm: Your output file.
-c:v libvpx-vp9: Uses the high-quality VP9 video codec (standard for WebM).
-crf 20: This is the Quality Slider.
Range is 0–63. Lower is better quality.
30 is standard web quality.
15–20 is "Visually Lossless" (High Quality).
0 is technically lossless, but creates files that are way too big.
-b:v 0: Required for VP9 to let the CRF setting take control.
-c:a libopus: Use the high-quality Opus audio codec.
Thanks for all the recommendations! With any luck I’ll be able to upload something in time for the Lunar New Year.