- Use standard 4:3 & 16:9 video sizes if possible.
Or use sizes that are multiple of 4:3 or 16:9 aspect ratios and also multiple of 16 (the encoder works in square blocks of 16x16 pixels).
Formula for 4:3 aspect ratio:Width: 64*n / Height: 48*nFormula for 16:9 aspect ratio:Width: 256*n / Height: 144*n* Where n can be any natural number you want.
- If you already have a custom size video and you want to quickly adjust it for a perfect look, try the 'MP4 Video size corrector' on this page.
Use both .webm and .mp4 formats (.webm in front of .mp4).