NGINX Cookbook, 2nd Edition by Derek DeJonghe

Author:Derek DeJonghe [Derek DeJonghe]
Language: eng
Format: epub
Publisher: O'Reilly Media, Inc.
Published: 2022-05-20T00:00:00+00:00

Discussion

The HLS module available in NGINX Plus provides the ability to transmultiplex MP4 media files on the fly. There are many directives that give you control over how your media is fragmented and buffered. The location block must be configured to serve the media as an HLS stream with the HLS handler. The HLS fragmentation is set in number of seconds, instructing NGINX to fragment the media by time length. The amount of buffered data is set with the hls_buffers directive specifying the number of buffers and the size. The client is allowed to start playback of the media after a certain amount of buffering has accrued, specified by the hls_mp4_buffer_size. However, a larger buffer may be necessary because metadata about the video may exceed the initial buffer size. This amount is capped by the hls_mp4_max_buffer_size. These buffering variables allow NGINX to optimize the end-user experience. Choosing the right values for these directives requires knowing the target audience and your media. For instance, if the bulk of your media is large video files, and your target audience has high bandwidth, you may opt for a larger max buffer size and longer length fragmentation. This will allow for the metadata about the content to be downloaded initially without error and for your users to receive larger fragments.

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