4K Video playing very slow

1st Official Post

    Hi, I’m new to LibreELEC. My friend gave me his Chromebook R11 CB5-132T - Tech Specs | Laptops | Acer United Kingdom chrome book for me to try this. I’m booting and running LibreELEC on USB and passing through audio to AG receiver. HEVC 1080p videos playing flawless but 2160p videos playing very slow to the point it is unwatchable. USB os is on usb 2 and I’m playing video from usb 3 ssd. Hardware video decoding is also enabled. I’m not sure if this device can handle this. Please advise. Thanks!

    That processor is relatively old. There is no way it will support HEVC software decoding at 2160p (and it lacks the necessary hardware acceleration). You will be able to play some 4k files using the AVC codec, but nothing ripped from a 4k blu-ray without re-encoding.

    I tried the command vainfo. this is what came up:

    # vainfo

    libva info: VA-API version 1.5.0

    libva info: va_getDriverName() returns 0

    libva info: Trying to open /usr/lib/dri/i965_drv_video.so

    libva info: Found init function __vaDriverInit_1_5

    libva info: va_openDriver() returns 0

    vainfo: VA-API version: 1.5 (libva 2.5.0)

    vainfo: Driver version: Intel i965 driver for Intel(R) CherryView - 2.3.0

    vainfo: Supported profile and entrypoints

    VAProfileMPEG2Simple : VAEntrypointVLD

    VAProfileMPEG2Simple : VAEntrypointEncSlice

    VAProfileMPEG2Main : VAEntrypointVLD

    VAProfileMPEG2Main : VAEntrypointEncSlice

    VAProfileH264ConstrainedBaseline: VAEntrypointVLD

    VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice

    VAProfileH264Main : VAEntrypointVLD

    VAProfileH264Main : VAEntrypointEncSlice

    VAProfileH264High : VAEntrypointVLD

    VAProfileH264High : VAEntrypointEncSlice

    VAProfileH264MultiviewHigh : VAEntrypointVLD

    VAProfileH264MultiviewHigh : VAEntrypointEncSlice

    VAProfileH264StereoHigh : VAEntrypointVLD

    VAProfileH264StereoHigh : VAEntrypointEncSlice

    VAProfileVC1Simple : VAEntrypointVLD

    VAProfileVC1Main : VAEntrypointVLD

    VAProfileVC1Advanced : VAEntrypointVLD

    VAProfileNone : VAEntrypointVideoProc

    VAProfileJPEGBaseline : VAEntrypointVLD

    VAProfileJPEGBaseline : VAEntrypointEncPicture

    VAProfileVP8Version0_3 : VAEntrypointVLD

    VAProfileVP8Version0_3 : VAEntrypointEncSlice

    VAProfileHEVCMain : VAEntrypointVLD

    • Official Post

    4K videos tend to be 10bit HEVC files, your Chromebook only does 8bit via GPU decoding.

    So for 10bit videos, the under-powered CPU needs to step in, but is unfortunately not up to the task.

    picked up RPI 4 to try on. it can play 4k but I'm not seeing my receiver name in system/audio/Audio output device.

    I can see my avr name when I run Chromebook.

    So, I'm not able to choose audio passthrough for DTS-HD and TrueHD.

    Any ways to make rpi4 to show my receiver?

    thanks.