Convert professional footage
Create a compatible MP4 H.264 8-bit 4:2:0 copy on your computer, even from a 28 GB source.
Your original stays untouched on your drive. Conversion uploads no files.
Install and launch
Install FFmpeg and FFprobe once.
With Homebrew installed: brew install ffmpeg. Otherwise, see FFmpeg downloads below.
Download and open the launcher, then select your footage and copy type.
In Terminal: chmod +x ~/Downloads/imascreen-converter.command, then double-click the file. If macOS blocks it, consult its security options; do not disable global protection.
Wait for confirmation, then import the new MP4 into your ImaScreen project.
- Light copy: longest edge up to 960 pixels for editing; not an HD/4K export.
- Original dimensions: retains dimensions (rounded to even pixels), for editing and exporting from a readable copy. Conversion to 8-bit 4:2:0 is lossy.
Local launchers, not signed applications. Time depends on your computer; allow free disk space and keep it on. Audio is converted to AAC when present. HDR colours are not automatically restored. Mac/Windows launchers and a real 28 GB source still need testing.
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