Live DASH stream fails playing with dash.js

Dash-Industry-Forum / dash.js

A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.

http://reference.dashif.org/dash.js/nightly/samples/dash-if-reference-player/index.html

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Live DASH stream fails playing with dash.js #1723

Closed AviVahl closed 7 years ago

AviVahl commented 7 years ago

Environment

[x] The MPD passes the DASH-IF Conformance Tool on http://dashif.org/conformance.html
[x] The stream has correct Access-Control-Allow-Origin headers (CORS)
[x] There are no network errors such as 404s in the browser console when trying to play the stream
[x] The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ
[x] The issue occurs in the latest reference client on http://dashif.org/reference/players/javascript/ and not just on my page
Link to playable MPD file: http://live-ftv.wixmp.com/mpds/stream.mpd
Dash.js version: 2.4.0
Browser name/version: Chrome 55 x64
OS name/version: Windows 10 Pro x64

Steps to reproduce

Observed behaviour

Dash.js infinitely requests for chunks, but never fills buffer.

Console output

dashif.org-1482609685455.txt

Additional information

Same stream plays with bitmovin's player: http://bitmovin.com/hls-mpeg-dash-test-player/

cbrady60 commented 7 years ago

I had this same problem but being new to DASH I did not know how to debug it. All I could do (since it had been working earlier) was to make sure everything else was still working ... leading me to investigate if anyone else had this error. My question is how were you able to get the debug info contained in your attached file dashif.org-1482609685455.txt. I looked in my (Chrome) browser Console and did not see anything? Did you use the debug version (dash.all.debug.js which has an earlier date of 2007-06-12 18:02:31)?

AviVahl commented 7 years ago

@cbrady60 the demo page has debug logging enabled: http://dashif.org/reference/players/javascript/v2.4.0/samples/dash-if-reference-player/index.html

So you can open your browser's dev tools, switch to the console tab, right click, and save as...

cbrady60 commented 7 years ago

@AviVahl yep great. Thanks

cbrady60 commented 7 years ago

@AviVahl do you happen to know of a way to access to the previous version which for me worked, or another working version somewhere? Sorry, but I am blocked.

dsparacio commented 7 years ago

Here are the player archives to test with http://dashif.org/reference/players/javascript/

The cdn code is all versioned if you want that and tagged in github E.g. v2.3 inplace of "latest" in the path

I see the failure the mpd looks fine besides this large update period for live it should be around 30 seconds or less I would think you have it at 595 hours but this is not the issue I do not think minimumUpdatePeriod="PT595H"

Conformance tool says mpd checks out but fails in rep 1 http://dashif.org/conformance.html

Error from tool:

error:

Failed to process Adaptation Set 1, Representation 1!

cbrady60 commented 7 years ago

@AkamaiDASH Let me know if I am jumping into @AviVahl issue and if I should go somewhere else to ask my questions. I am not the original writer of this issue. So I am using the information for "Quick start for Users" where I create a .html file and point to http://cdn.dashjs.org/latest/dash.all.min.js which used to work prior to 12/20. I tried looking at http://cdn.dashjs.org/v2.3/dash.all.min.js (replacing "latest" with v2.3, V2.3, v2.30 etc.) with the result that the file was not found. Sounds like you are saying the issue may not be with this latest version of dash.all.min.js (it is very possible I may be doing something wrong but it worked about a week ago and I think I have checked everything else), but how can I get the previous version of dash.all.min.js?

davemevans commented 7 years ago

@cbrady60 http://cdn.dashjs.org/v2.3.0/dash.all.min.js

@AviVahl It looks from the logs like the timing in the mp4 wrapper is incorrect compared to what is advertised in the MPD. See the baseMediaDecodeTime - this is some way off from the calculated live edge. Note that http://shaka-player-demo.appspot.com/demo/ doesn't play the stream either.

cbrady60 commented 7 years ago

@bbcrddave thank you very much.

FYI I was able to successfully play video using http://cdn.dashjs.org/v2.3.0/dash.all.min.js with method of "Quick start for Users" (for us newbies) on Chrome Version 55.0.2883.87 m (64-bit). I have not had success (everything else remaining the same) playing using http://cdn.dashjs.org/latest/dash.all.min.js

davemevans commented 7 years ago

@cbrady60 https://github.com/Dash-Industry-Forum/dash.js/issues/1722

carlanton commented 7 years ago

We are seeing the same issue with our live streams and dash.js 2.4.0. We've been using 2.3.0 (and perhaps 2.2.0) a few months now without any issues. How can I verify the mp4 timing?

This is one of our streams that is playing in 2.3.0 but not in 2.4.0: https://svt01-a.akamaized.net/u/svt01.mpd

dashjs-2.4.0-live.txt

davemevans commented 7 years ago

@carlanton your problem is probably different since it works in v2.3, whereas the OPs stream does not. Probably worth opening a new issue since this is a regression.

dsparacio commented 7 years ago

@carlanton Ill take a look at this today to see what is going on. Thanks for reporting.

AviVahl commented 7 years ago

Appreciate the analysis of the root cause. Forwarded the info to our backend team.

carlanton commented 7 years ago

@bbcrddave @AkamaiDASH Sorry, I missed that. I've created a new issue here: #1729

AviVahl commented 7 years ago

Closing this one then. Thanks again! 👍