Video Requirements

Codecs ‐ encodes all uploaded video to the H.264 codec and therefore recommends for best quality that all source video also be encoded to H.264. The following table outlines recommended settings as well as other acceptable codecs:

Recommended Codecs Other Acceptable Codecs
Video H.264 MPEG-1, MPEG-2, MPEG-4, VP6, VP5, H.263, WMV, MJPEG
Audio MP3 (160 kbps) AAC (128 kbps), WMA, MP2, WAV, ADPCM

File Size - The maximum supported media file size is 5 GB before uploading.

Interlace – All media should be de-interlaced before uploading. Interlaced video is primarily used for television and does not display well on computer screens.

Frame Rate – Recommended frame rates are 24 (23.98), 25, or 30 (29.97) frames per second (fps). Settings that are larger than these recommendations are acceptable but may result in poor user viewing experiences due to high CPU usage.

Bitrate – A bitrate of at least 1500 kilobits per second (kbps) is recommended for HD quality.

Aspect Ratio – Virtually any aspect ratio (including 16:9 widescreen and 4:3 standard) is supported. However, recommends the use of a 16:9 aspect.

Frame Size – recommends that the original file be encoded to a frame size that matches the desired aspect ratio (e.g. 1024 x 576 for 16:9 widescreen or 1024 x 768 for 4:3 standard. The recommended frame sizes for our preferred 16:9 aspect ratio are 640x360, 1024x576, or 1280x720. For videos that are intended to be displayed in fullscreen mode a minimum width of 1024 is recommended.