InformaCam Server Standard Video Resolutions¶

Enabling “responsive” design on the InformaCam server, for video playback (the recommended method for best playback quality) does not fit within the current implementation of the front-end UX. The front-end is using the Sammy framework, and an initial capture of window size (at time of load) to calculate a controlled px size of all divs that are in the Sammy “tree”. This initial calculation of screen size, and its related tightly “controlled” pixel layout becomes important to accurately locate video and image annotations within their applicable image/video frames. Therefore, the InformaCam server / UX will not attempt responsive video playback, and will instead control for standard screen sizes; and serve up video that has been compressed into an appropriate standard size and which fits within the available screen space.

Referring to “Android Supported Media Formats” (see [https://developer.android.com/guide/appendix/media-formats.html]), the following supported file types should be considered, when Android devices are submitting video to InformaCam:

• 3GPP
• MPEG-4
• MPEG-TS
• WebM
• Matroska

Based on these file formats the following compression formats and/or related specification should be considered:

File Format	Standard/Specification	Android Suggested Format	Notes
3GPP	H.263
MPEG-4	H.264	x
MPEG-TS	MPEG-2
WebM	H.264
Matroska	Inherits from multiple including 3GPP, MPEG-4, MPEG-TS and WebM

Based on these file formats the following compression formats and/or related specification should be considered:

Incoming format	px*
3GPP
	128 X 96
	176 x 144
	352 x 288
	704 x 575
MPEG-4, WebM	RECOMMENDED ANDRODID FRAME SIZES; APPLY as DEFAULT
	176 x 144
	480 x 360
	1280 x 720
MPEG-TS
	720 × 576
	720 × 480
	704 × 576
	704 × 480
	352 × 576
	352 × 480
	352 × 288
	352 × 240
Matraska
	Inherits from parent format, android supported above