Some h264 files will not render any video

[tmm1]

Issue description

Some H264 videos (ones that use PAFF interlacing it appears), do not play in ExoPlayer on any device. Other players (like VLC) which also use MediaCodec are able to play these same videos.

mediainfo shows this about the affected files:

Scan type                                : Interlaced
Scan type, store method                  : Separated fields
Scan order                               : Top Field First

Reproduction steps

Add https://s3.amazonaws.com/tmm1/uk-interlaced-h264.ts to media.exolist.json and try to play it.

Version of ExoPlayer being used

r2.8.2 (f7ed789)

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

Tested on SHIELD running API 26, and Amazon FireTV 3rd generation running API 25

A full bug report captured from the device

Happy to provide if necessary, but the issue reproduces easily on any device.

[ojw28]

Please see: http://google.github.io/ExoPlayer/faqs.html#why-do-some-mpeg-ts-files-fail-to-play

[tmm1]

ExoPlayer will appear to be stuck in the buffering state when asked to play an MPEG-TS file that lacks AUDs or IDR keyframes.

Thanks for the pointer. I confirmed that this sample is missing IDR slices, and setting FLAG_ALLOW_NON_IDR_KEYFRAMES fixes the playback issue.