I am unable to play HLS video with 5.1 audio track on Chromecast 2 and Chromecat Ultra. The same files worked just fine on previous firmware releases before 1.28.100555.
In order to avoid any Objective-C programming errors all the tests I made were done using a slightly modified "CastVideos-ios" (official sample from Google Cast SDKs github). The only modification I made is related to "media_list_1_url" in order to make the application load a custom JSON file pointing to my video sample files. The JSON list is available at this link:
http://144.76.13.14/GoogleCastTestList.json
When I try to play the 5.1 audio track version on Chromecast 2 and Chromecast Ultra the video simply dose not load. Both of the test files play without problems on Chromecast 1.
Can someone help me find out if this is a Chromecast firmware issue or I must modify the Cast sender app code in order to play 5.1 audio files ?