Supported formats for YouTube

This specification applies to the publish of assets from GV STRATUS system to YouTube.

Formats supported are as follows:

Supported formats		Notes
Video	1080p HD	—
	MPEG-2	Saved with a .MPG extension
	MPEG-4	—
Audio	Dolby AC-3	For MPEG-2, with audio bitrate: 128 kbps or more
	MPEG Layer II	For MPEG-2, with audio bitrate: 128 kbps or more
	AAC	For MPEG-4, with audio bitrate: 128 kbps or more
Close Caption	SubRip (.srt)	Only basic versions of these files are supported. No style information (markup) is recognized. The file must be in plain UTF-8.
	TTML: Timed-Text Markup Language (.ttml)	In partial implementation. SMPTE-TT extensions supported for CEA-608 features. iTunes Timed Text (iTT) file format is supported; iTT is a subset of TTML, Version 1.0. Styling and positioning are supported.
	Scenarist Closed Caption (.scc)	These files have an exact representation of CEA-608 data, which is the preferred format whenever captions are based on CEA-608 features.
Thumbnail	JPG	1 thumbnail along with the Video/Audio content. YouTube creates three individual thumbnails per upload based on their algorithm, and only one can be selected as the clip thumbnail.

Note: A standard YouTube account has the file size limitation of 2 GB and the clip duration depends on the used video codec.