[mythtv-users] ECS LIVA vs ECS LIVA-X

[Phil Wild]

On 8 February 2015 at 03:20, Frank Phillips <frankalso at gmail.com> wrote:
> On Sat, Feb 7, 2015 at 1:06 PM, Dave MythTV <dave.mythtv at gmail.com> wrote:
>>
>>
>> Phil-
>>
>> I'm similar to Karl - I'm using the LIVA's analog audio output, connected
>> direct to my amplifier, but using HDMI for the video to the TV.   No audio
>> sync or drift issues of any kind for me.   So it must be something with the
>> HDMI audio subsystem, or the processing of HDMI audio in your TV that is
>> causing that problem?
>>
>>
>> For your LiveTV issues, I bet you are hitting this bug:
>> Ticket #12319: “Switching LiveTV channels breaks VAAPI acceleration“
>> https://code.mythtv.org/trac/ticket/12319
>>
>
> This may explain both the audio drift in livetv and the deinterlacer
> downgrading. Starting lievtv, it uses vaapi. After a channel change (or
> maybe even a program boundary), switches to ffmpeg (software) decoding. The
> cpu can't keep up, and you see both symptoms.
>
> While in livetv, go to M > Playback > Playback Data and see if the symptoms
> happen when it uses ffmpeg.
>

Thanks,
I'll report back. I think you have nailed it. I'm fairly certain I've
noticed the change in deinterlacing at the boundary between TV show
and commercial break. Is it possible that there is a change in the
signal at that point?