Video Profiles
A video_profile defines a set of video and audio attributes for the output. Following attributes are given:
Video Resolution: output frame size - only the height of frame is used (1080p, 720p..etc); width of frame is based on the input display aspect ratio.
Video Codec: video codec to compress and produce the output - currently H264 is supported. Additional codecs like H265, VP9, and AV1 are coming soon.
Video Bitrate: number of kilobits per second (kbps) used to compress and produce video output. Higher the bitrate delivers better quality. However, higher bitrate produces higher data output: harming the playback experience, increasing the storage, delivery, and costs.
Video Framerate: number of frames per second.
Audio Codec: audio codec used to compress and produce audio output. Default codec is AAC.
Audio Channel: number of audio channels. Default number of channels is 2
Audio Bitrate: number of kilobits per second (kbps) used to compress and produce audio output. Default audio bitrate is 128 kbps.
Segment Duration: The duration of HLS / DASH segments in seconds. Higher value increases latency/buffer time, but stabilizes playback experience.
Orientation: video frame orientation. With the increase of portrait(vertical) videos , this attribute helps Uiza optimize the output.
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