[mythtv-users] Playback Video Stutters & Audio Quits on one Frontend

[John Pilkington]

On 13/08/2020 04:28, Stephen Worthington wrote:
> On Wed, 12 Aug 2020 13:47:04 -0500, you wrote:
> 
>> On Mon, Aug 10, 2020 at 4:39 AM John Pilkington <johnpilk222 at gmail.com>
>> wrote:
>>
>>>
>>> That's an intriguing idea, and as you say it could be decoder-dependent.
>>>    But it might be worth looking at the audio readahead setting:
>>>
>>> Frontend setup > Video > Playback > Advanced Playback Settings >
>>>     Audio read ahead (ms)
>>>
>>> "Increase this value if audio cuts out frequently....."
>>>
>>> Default is 100 ms.  On my GT 710 box it's at 400 ms.  I suppose I did that.
>>>
>>> John P
>>>
>>
>> Using multiple steps, I tried using HandBrake to transcode the example
>> video to h.264,  swapped the original file with the h.264 version, rebuilt
>> the seek tables for the h.264 doppelganger, ran a full mythcommflag pass on
>> it to detect commercial breaks, and changed audio from 5.2 to stereo.  None
>> of these worked, but I did notice that the h.264 file was easily 1/3 the
>> size of the original.  My conclusion is to just watch the troublesome
>> recordings on the BE/FE and/or re-record them now that I'm using an
>> (external) infiniTV 6 instead of a pair of PVR-500 cards.  Besides, if/when
>> I break down and upgrade my MythTV version, things may clear up. ?
>>
>> In any case, a big thank you to all for the many suggestions.  They were
>> all worth a try.
> 
> Running mythcommflag to re-do the commercial breaks does not rebuild
> the seek table.  If you want to rebuild the seek table, which is what
> works for me, you need to do "mythcommflag --rebuild", and then after
> that if you want the commercial flagging, run mythcommflag again to do
> that.

I don't know if after all that action you still have the original file 
playable on one of your frontends.  If so, you could try a 'lossless' 
mythtranscode --mpeg2

Do a mythcommflag --rebuild first.  Then you could, if you wish, 
establish a cutlist.  Or just go ahead and do the cutting later.   I 
haven't used mythtranscode recently, but it ought to work.