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Adaptive Bitrate Streaming

Last updated: 2024-09-11 14:42:07

    Overview

    Adaptive bitrate streaming (ABR streaming) involves creating audio/video files with various bitrates. After using adaptive bitrate streaming, a player can dynamically select and play back the most appropriate bitrate based on the viewer’s current bandwidth. VOD can convert videos to mainstream adaptive bitrate streaming formats such as HLS and DASH.
    Capability
    Description
    Supported formats
    HLS and DASH.
    Ultra fast start
    An adaptive bitrate stream contains multiple resolutions. The player generally starts playback at a low resolution to help playback start faster.
    Smart resolution switch
    The player dynamically selects the most appropriate resolution for playback based on the current bandwidth.
    Zero-lag switch
    The frames of each stream are aligned, ensuring zero-lag when switching between streams with different resolutions.
    High video/audio quality
    Up to 8K FHD resolution is supported.
    Stereo is supported.
    HDR is supported.
    Advanced encoding technologies
    You can use advanced encoding formats such as H.265, H.266, and AV1 and Top Speed Codec transcoding to reduce the video bitrate.
    Encryption and DRM
    Media encryption and DRM schemes such as Widevine and FairPlay all depend on adaptive bitrate streaming.
    Note:
    Differences between adaptive bitrate streaming and transcoding:
    An adaptive bitrate streaming URL contains outputs in multiple resolutions, while a transcoding URL contains an output in only one resolution.
    With adaptive bitrate streaming, the player switches to the optimal resolution in real time based on current network conditions. Transcoding outputs do not support intelligent resolution switch.

    Use Cases

    Use Case
    Description
    Online education
    For copyright protection, online education platforms often need to encrypt their video courses or enable DRM.
    Video website
    Video websites have rich video resources, and adaptive bitrate streaming can deliver a smoother viewing experience.
    Online TV
    Online TV platforms may need to protect their resources. In addition, viewers may want to switch to a higher resolution while watching a video.

    How to Use

    For detailed directions on how to use the feature, see Transcoding to Adaptive Bitrate Streaming.
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