Seamless switch between mpd sources

[jonybekov]

Hi. Our server generates new MPD with different URL every 30 minute for security reasons. When an MPD is expired, I need to replace it with new MPD source with "attachSource" method.
Currently, when attaching new source, video goes black for short period of time until new source is loaded and ready. Is it possible to keep last frame from previous MPD to be visible until new source is attached and ready to be played? I want to make mpd transition seamless to the user.

[dsilhavy]

Some thoughts here:

• Is the content/structure of the MPD the same as the one of the previous MPD and only the URL changes? Then you can potentially also use the <Location> element in the MPD to tell the client to download the next update of the MPD from a different URL
• There is no method to maintain the video data of the previous MPD until the video data of the new MPD has been loaded. A workaround might be to use two video elements and then switch between them once the content of the new MPD was loaded.
• You can also try using a second player instance and preloading the new MPD: https://reference.dashif.org/dash.js/nightly/samples/advanced/preload.html. Then assign your video element to this new player instance. I haven't tried this, though.