AAC is the dominant audio CODEC in use today and almost every device supports this audio CODEC. Video with less than 5 fps or greater than 120 fps will be normalized to 30 fps. Video frame rates within this range will be preserved. Video with average frames per second (fps) less than 5 or greater than 120 is considered non-standard. Video with more complex uses of EDLs are considered non-standard. A good example of a Simple Edit Decision List is to fix out of order frames in the video. Edit Decision List (EDL) is typically added during post-production and defines how certain segments are used to build the track timeline for playback. This means that high dynamic range video (HDR) is currently considered non-standard, and will be normalized to SDR. If you don't know what this is, you can probably ignore this, since most streaming video is 8-bit 4:2:0. This refers to the color depth and chroma subsampling. While Mux accepts higher bitrate inputs, bitrates higher than 8Mbps (and the bitrate should not exceed 16Mbps for any single GOP) are generally challenging for most viewer's connections and are considered non-standard. Standard input must be closed-GOP, which means that open-GOP video will be treated as non-standard and will be normalized to standard. This means that every GOP can be played independently, without reference to another GOP. Closed GOP always begins with an IDR (Instantaneous Decoder Refresh) frame. You can likely ignore this.) In closed-GOP video, all B frames reference other frames in the same GOP. To stream well using HTTP-based streaming methods like HLS, Mux requires all keyframes intervals to be less than 20 seconds. While Mux accepts other CODECs as input, other CODECs must be normalized to H.264 and are considered non-standard. H.264 is the dominant video CODEC in use today and almost every device supports H.264. Video larger than this is considered non-standard. Video up to 2048x2048 is considered standard, including 1080p (1920x1080) video. Standard input has the following attributes.
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