When using the MP4 container, the following output settings are available:
- Web Optimized
Also known as "Fast Start"
This places the container header at the start of the file, optimizing it for streaming across the web.
- iPod 5G Support
This option adds an atom to the MP4 file which allows legacy iPods (5th Generation classic style) to play the file if the rest of the settings are within the devices limitations.
These options are not applicable to the MKV container.