Live / Dynamic content with long timeShiftBufferDepth on 1.4.0 player

[mikek-elemental]

Hello,

I am having a problem playing live (dynamic) streams with a longer timeShiftBufferDepth using the 1.4.0 version of the player. It will play for 30-60 seconds and then stall. (minimumUpdatePeriod is set to 30 seconds, so it likely stalls after an MPD refresh.) For an example, this one with a 10 minute timeShiftBufferDepth shows the problem:

http://deltademo.elementaltechnologies.com/out/i/113.mpd

Streams with less buffered content (in this case 60 seconds) play fine:

http://deltademo.elementaltechnologies.com/out/i/112.mpd

Both streams play fine using the 1.3.0 version of the player (if using Chrome, you must patch 1.3.0 for #428 )

I also notice that playback appears to be farther behind the live point in 1.4.0, but that may be an intentional change.

A snippet of the console log when this happens is:

Debug.js:115 loaded video:Media Segment:88368.34658888889 (200, 73ms, 26ms) 
Debug.js:115 [video] Buffered Range: 88323.301588 - 88371.349588 
Debug.js:115 loaded audio:Media Segment:88371.35571111111 (200, 67ms, 5ms) 
Debug.js:115 [audio] Buffered Range: 88323.336844 - 88374.374299 
Debug.js:115 loaded video:Media Segment:88371.34958888889 (200, 103ms, 52ms) 
Debug.js:115 [video] Stream is complete 
Debug.js:115 [audio] Stream is complete 
Debug.js:115 [video] Buffered Range: 88323.301588 - 88374.352588 
Debug.js:115 Parsing complete: ( xml2json: 27ms, objectiron: 76ms, total: 0.103s) 
Debug.js:115 Manifest has been refreshed. 
Debug.js:115 Manifest has loaded. 
Debug.js:115 Refresh manifest in 29.892 seconds. 
Debug.js:115 Local time:      Tue Sep 08 2015 11:11:27 GMT-0700 (Pacific Daylight Time) 
Debug.js:115 Server time:     Tue Sep 08 2015 11:11:25 GMT-0700 (Pacific Daylight Time) 
Debug.js:115 Difference (ms): -2665 
Debug.js:115 Manifest updated... set new data on buffers. 
Debug.js:115 Added 0 inline events 
Debug.js:115 [video] stop 
Debug.js:115 [audio] stop 
Debug.js:115 [video] start 
Debug.js:115 [audio] start 
Debug.js:115 Start Event Controller 
Debug.js:115 [video] Stalling Buffer 
Debug.js:115 [video] Waiting for more buffer before starting playback. 
Debug.js:115 [audio] Stalling Buffer 
Debug.js:115 [audio] Waiting for more buffer before starting playback. 
Debug.js:115 

Let me know if there is any other information I can provide which would help, thanks!
-Mike

[dsparacio]

We just released 1.5 can you test with that and see if the issue is solved. I know we addressed . There is an API to set the holdback from the live edge as of 1.4. Default is 4 segments regardless of segment duration.

[mikek-elemental]

Thank you! I just tried it in 1.5.0 and playback appears to be much better there. I didn't see this problem anymore. I'll do some more detailed testing over the coming days and re-open this if needed, but it looks like this is fixed.