ExoPlayer Demo app stuck at buffering when playing MPEG-4 network stream

[naceto]

Issue description

Trying to play a HD MPEG-4 network stream with the demo app, player is stuck at buffering state. When I downloaded part of the stream and added the file to the assets folder of the demo app, there is only audio playing.

Reproduction steps

By adding the linked file to the demo app's assets folder and adding it to media.exolist.json.

Link to test content

Test steam:
https://drive.google.com/file/d/0B3T5QyE45HZ9S3VmU0phVHA0dk0/view?usp=sharing

Version of ExoPlayer being used

Tryed it on both the release-v2 branch and dev-v2 branch. Version in build.gradle shows releaseVersion = 'r2.3.0' (in the dev-v2 branch)

Device(s) and version(s) of Android being used

Tested on OnePlus One (6.0.1) and Sony KD43XD8088 Android TV (6.0.1)

[AquilesCanta]

See #1894 and similar issues (there are plenty). It works if you enable FLAG_ALLOW_NON_IDR_KEYFRAMES.