HLS qualification checklist
Use this checklist to qualify HLS ingest streams.
Akamai uses the following test cases to qualify HLS ingest.
|Basic streams test||
Verify if the first line of the bit rate playlist files is
Verify that the number of streams received is the same as the number of streams expected.
|Bit rate playlist alignment.||Verify if the tag EXT_X_MEDIA_SEQUENCE is consistent across playlists (optional).|
|Bit rate playlist upload interval||Verify that the bit rate playlist upload interval is almost equal to the segment upload interval.|
|Directory rollover||Verify if directory rollover happens at consistent intervals.|
|ENDLIST tag when the stream stops||Verify if the EXT-X-ENDLIST is present in the playlist when publishing stops.|
|Error recovery test (failover to a different entry point – DNS lookup test)||Check if the transition to the secondary entry point is seamless.|
|Error recovery test (streams reconnect to same entry point)||Verify the ts segment IDs on reconnect.|
|HTTP request type||Verify that the HTTP request type for the ts segments is either PUT or POST.|
|Long duration publish||Verify playback and analyze the stream publish after 48 hours of publish.|
|Master playlist upload interval||Verify that the master playlist file does not get uploaded too frequently.|
|Playback||Verify playback on QuickTime, Safari, and iPad. Refer to Primary and backup HLS stream URLs|
|Segment numbering||Check that the segment numbering is not close to (2^32)-1.|
|Segment retry on 5xx error and verify the retry interval||Trigger a 5xx response to the encoder by modifying the delivery-hostname for the
Trigger a 5xx response by modifying the forward target host and verify encoder behavior.
|Segment upload interval||Verify if the segment upload interval is almost equal to the advertised values.|
|Session ID verification.||Verify that the master playlist file does not have session IDs
mentioned in the bit rate URLs.
Verify that the session IDs are same across all bit rates.
|ts segments and bit rate URL||Verify that the segment numbers are sequentially increasing.
Verify is response received is 200 by requesting random ts segments (first one, last one, and a middle one).
Verify that EXT-X-MEDIA-SEQUENCE corresponds to first segment in the bit rate playlist.
Verify if any of the #EXTINF has negative values in the bit rate m3u8 files.
|User-Agent string||Verify if the encoder is sending a valid User-Agent string.|
|Verify if the session ID and directory path is unique during republish.||When an encoder stops the publish and starts another one, the path must be unique.|