Redmi Note-4 is under-reporting video playback capabilities

[GouravSna]

Question: On Redmi Note-4, getTrackSupport in TrackSelectionView class does not return the device capability result properly.

I added all the tracks available for the following media, then I could see that device is capable enough to play the 10.29 Mbps(4k) media.

Issue: getTrackSupport should return the proper device capable tracks. Is there some issue in this method or should i use any other method to get the results correct.

[GouravSna]

One more question:

Can we achieve this by checking the track codec with the deviceSupported codec types ?

Ex:

MediaCodecList.getCodecCount() // Total codec count

Then by looping over all the codec counts,

final MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(i);
     for (String supportedType : codecInfo.getSupportedTypes()) {

then if codec is supported then shall we decide that the device is capable to play the video/audio ?

[GouravSna]

@ojw28 , please suggest.

[AquilesCanta]

I am assuming the track is reported as "NO_EXCEEDS_CAPABILITIES". If that's the case it's possible that the device is under-reporting capabilities. I don't think we work around these issues on the ExoPlayer side. You can implement a custom Track Selector that does overrides this selection for you. You can also contact the device manufacturer about this issue. Any input on this @ojw28?

[ojw28]

Without proper, complete and precise reproduction steps, there's nothing we can do to efficiently look at this issue. Please provide some.

[GouravSna]

Steps to reproduce:
Media Stream URL: https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8
Branch: dev-v2

Steps:

1. In TrackSelectionView class, line ~274

Replace:
if (mappedTrackInfo.getTrackSupport(rendererIndex, groupIndex, trackIndex) == RendererCapabilities.FORMAT_HANDLED) { trackView.setFocusable(true); trackView.setTag(Pair.create(groupIndex, trackIndex)); trackView.setOnClickListener(componentListener); } else { trackView.setFocusable(false); trackView.setEnabled(false); }

with this,
/* if (mappedTrackInfo.getTrackSupport(rendererIndex, groupIndex, trackIndex) == RendererCapabilities.FORMAT_HANDLED) {*/ trackView.setFocusable(true); trackView.setTag(Pair.create(groupIndex, trackIndex)); trackView.setOnClickListener(componentListener); /*} else { trackView.setFocusable(false); trackView.setEnabled(false); }*/

2. In Select tracks dialog, select the bottom video track,

4096 * 1744, 10.29 Mbps

3. Press OK.

Result:

On Moto G6, it fails with decoder init failed, which is fine because device is not capable enough to play this.

Caused by: com.google.android.exoplayer2.mediacodec.MediaCodecRenderer$DecoderInitializationException: Decoder init failed: OMX.qcom.video.decoder.avc, Format(7, null, null, video/avc, avc1.4D4033, 10285391, null, [4096, 1744, -1.0], [-1, -1])

On Redmi Note-4 Snapdragron, it plays this video tracks although if (mappedTrackInfo.getTrackSupport(rendererIndex, groupIndex, trackIndex) == RendererCapabilities.FORMAT_HANDLED) return false; so by this means this device should not be capable enough.

[ojw28]

Closing as an obsolete device specific issue.