Capabilities: ExoPlayer does not play mov format video.

[shirensong]

I follow the demo and play a mov format video, there is only sound but no video... But if I use the base MediaCodec api with compile version 23 to play this video, it will be OK and everything is great.
here is the file link for this sample mov:

https://pan.baidu.com/s/1slnKXrv

based on exoplayer r2.0.4
a device with android 6.0
below is the adb log:

10-26 18:07:33.614 32300-32300/? I/main: type=1400 audit(0.0:428): avc: denied { open } for path="/selinux_version" dev="tmpfs" ino=9206 scontext=u:r:zygote:s0 tcontext=u:object_r:tmpfs:s0 tclass=file permissive=1
10-26 18:07:33.619 32300-32300/? I/art: Late-enabling -Xcheck:jni
10-26 18:07:33.619 32300-32300/? I/art: Late-enabling JIT
10-26 18:07:33.629 32300-32300/? I/art: JIT created with code_cache_capacity=2MB compile_threshold=1000
10-26 18:07:33.684 32300-32300/? W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
10-26 18:07:33.838 32300-32300/com.twos.demo I/ExoPlayerImpl: Init 2.0.4
10-26 18:07:33.853 32300-32320/com.twos.demo D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
10-26 18:07:33.921 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized profile/level 1/8192 for video/3gpp
10-26 18:07:33.921 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized profile/level 2/8192 for video/3gpp
10-26 18:07:33.921 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized profile/level 8/8192 for video/3gpp
10-26 18:07:33.923 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized profile/level 0/3 for video/mpeg2
10-26 18:07:33.925 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/raw
10-26 18:07:33.926 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/vc1
10-26 18:07:33.928 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/vnd.rn-realvideo
10-26 18:07:33.929 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/divx3
10-26 18:07:33.931 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/avs-video
10-26 18:07:33.932 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/x-motion-jpeg
10-26 18:07:33.936 32300-32320/com.twos.demo D/libEGL: loaded /vendor/lib/egl/libGLES_mali.so
10-26 18:07:33.938 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/wvc1
10-26 18:07:33.940 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/wmv3
10-26 18:07:33.941 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/x-ms-wmv
10-26 18:07:33.943 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/mp43
10-26 18:07:33.944 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/x-flv
10-26 18:07:33.946 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/rv30
10-26 18:07:33.947 32300-32318/com.twos.demo W/VideoCapabilities: Unsupported mime video/rv40
10-26 18:07:33.950 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized level 8192 for video/x-vnd.on2.vp9
10-26 18:07:33.950 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized level 8192 for video/x-vnd.on2.vp9
10-26 18:07:33.950 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized profile 2 for video/x-vnd.on2.vp9
10-26 18:07:33.950 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized level 8192 for video/x-vnd.on2.vp9
10-26 18:07:33.950 32300-32318/com.twos.demo W/VideoCapabilities: Unrecognized profile 8 for video/x-vnd.on2.vp9
10-26 18:07:33.956 32300-32320/com.twos.demo I/OpenGLRenderer: Initialized EGL, version 1.4
10-26 18:07:33.963 32300-32320/com.twos.demo D/mali_winsys: new_window_surface returns 0x3000
10-26 18:07:33.969 32300-32318/com.twos.demo W/AudioCapabilities: Unsupported mime audio/alac_caff
10-26 18:07:33.980 32300-32318/com.twos.demo W/AudioCapabilities: Unsupported mime audio/pcm-le
10-26 18:07:33.983 32300-32318/com.twos.demo W/AudioCapabilities: Unsupported mime audio/x-pcm
10-26 18:07:34.007 32300-32318/com.twos.demo I/VideoCapabilities: Unsupported profile 4 for video/mp4v-es
10-26 18:07:34.057 32300-32331/com.twos.demo I/OMXClient: Using client-side OMX mux.
10-26 18:07:34.063 32300-32331/com.twos.demo D/ACodec: [OMX.realtek.audio.dec] Allocating 4 buffers of size 32768/32768 (from 32768 using Invalid) on input port
10-26 18:07:34.064 32300-32331/com.twos.demo D/ACodec: [OMX.realtek.audio.dec] Allocating 4 buffers of size 32768/32768 (from 32768 using Invalid) on output port
10-26 18:07:34.078 32300-32300/com.twos.demo D/EventLogger: audioEnabled [0.24]
10-26 18:07:34.096 32300-32300/com.twos.demo D/EventLogger: audioDecoderInitialized [0.25, OMX.realtek.audio.dec]
10-26 18:07:34.096 32300-32300/com.twos.demo D/EventLogger: audioFormatChanged [0.25, id=2, mimeType=audio/mp4a-latm, channels=2, sample_rate=48000, language=```]
10-26 18:07:34.258 32300-32331/com.twos.demo D/ACodec: [OMX.realtek.audio.dec] Allocating 4 buffers of size 32768/32768 (from 32768 using Invalid) on output port
10-26 18:07:34.288 32300-32300/com.twos.demo D/EventLogger: audioSessionId [34]

[ojw28]

The issue here is most likely that the underlying platform is under-reporting the capabilities of the device to play video of type video/mp4v-es. On Pixel the decoder for this type is OMX.qcom.video.decoder.mpeg4, which claims to support a maximum decode width of 896px. Since the video provided is 1280px wide, ExoPlayer determines that the format exceeds the capabilities of the decoder and hence plays only the audio component.

If I force ExoPlayer to play the video stream regardless then it works fine, suggesting that the underlying platform should be reporting that it's capable of playing video in this format with larger decode widths, on Pixel at least.

• Perhaps we should be more optimistic and have ExoPlayer always try and play the stream in the case there's only one stream available and it exceeds the device capabilities. We'll have a think about this.
• You can experiment with force enabling the video stream for yourself by editing this part of TrackSelectionHelper so that the if block is always executed. You'll then be able to select the video stream in the demo app by clicking on the "Video" button.
• As an aside, if you control the way these videos are encoded, I'd strongly recommend you use H264 instead.

[shirensong]

@ojw28, so currently, is there a way to have ExoPlayer always try and play the stream in this case ?

[ojw28]

Not currently. We're thinking about it, but it's unclear whether it makes sense.

[ojw28]

Please could you:

1. Check out the latest dev-v2 code.
2. Try and play the affected video.
3. Paste the output of adb logcat -s "MediaCodecInfo" here. You should see a bunch of lines containing "FalseCheck" the detail exactly why the stream wasn't played.

Thanks!

[ojw28]

Fixed in dev-v2.