[mythtv-users] Sudden choppy playback

[Jay Harbeston]

> On May 3, 2020, at 6:36 AM, Damian <myth at surr.co.uk> wrote:
> 
> Hi All,
> 
> After updating my system (will I ever learn!) playback has suddenly gone very choppy on my main frontend. It's an old Liva mini computer that I plug into my projector.
> 
> Playback has been fine for years. It uses onboard Intel graphics.
> 
> My first thought was Myth, so I've tried playing videos outside of MythTV. They are still choppy (I guess that makes this an off-topic post, but it's all related to video playback, so hopefully no one minds).
> 


Are you using the VAAPI or VAAPI2  driver within mythtv. I also have an ECS LIVA, and found similar problems. Try switching between the 2 of them. Also try toggling the type of de-interlacing as well. I found that some of the deinterlacing types require more processing power, causing the choppy problems you describe.

Regards,

Jay



> I then wondered if the LAN connection was struggling, so I moved some files onto the Liva box. They still play choppy.
> 
> This is what "vainfo" returns.
> 
> libva info: VA-API version 1.5.0
> libva info: va_getDriverName() returns 0
> libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
> libva info: Found init function __vaDriverInit_1_4
> 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) Bay Trail - 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
>       VAProfileH264StereoHigh         :    VAEntrypointVLD
>       VAProfileVC1Simple              :    VAEntrypointVLD
>       VAProfileVC1Main                :    VAEntrypointVLD
>       VAProfileVC1Advanced            :    VAEntrypointVLD
>       VAProfileNone                   :    VAEntrypointVideoProc
>       VAProfileJPEGBaseline           :    VAEntrypointVLD
> 
> I've tried playing without vaapi, but that's even worse.
> 
> My current best guess is that a new video driver probably works great for new hardware, but has broken things from my older hardware. Does that sound likely?
> 
> If so, how can I try older drivers (I'm happy copying and pasting lines into the terminal, but that's about as far as my terminal knowledge goes)?
> 
> What do you think?
> 
> Thanks,
> Damian
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