[mythtv-users] Change v30.0-25-gbceea69806 makes playback visibly jumpy (March 10th)

[John]

On 29/03/2019 16:14, Peter Bennett wrote:
>
>
> On 3/26/19 3:32 PM, jksjdevelop wrote:
>>
>> On 26/03/2019 14:37, Peter Bennett wrote:
>>>
>>>
>>> On 3/25/19 3:33 PM, jksjdevelop wrote:
>>>> The Medea is 1080i 25Hz UK DVB-S2
>>>>
>>>> The platform is Ubuntu 18.10 64 bit Nvidia GeForce GT 
>>>> 1030/PCIe/SSE2 Driver Version: 390.116
>>>>
>>>> Change AVSync2: Use frame timestamps to determine elapsed play time 
>>>> - causes frames to be discarded.
>>>>
>>>> With verbose logging on playback.
>>>>
>>>> At the previous commit, the picture is rock solid with an even 
>>>> scrolling news ticker, despite some frames being discarded
>>>>
>>>> MythTV Version : v30.0-24-g90468ec49a
>>>> MythTV Branch : (HEAD detached at 90468ec49a)
>>>>
>>>> _______________________________________________
>>>
>>>
>>> There are several commits around that time
>>> (most recent is listed first)
>>> * 60cfb7c05a 2019/03/10 Peter Bennett : Fix compile error from 
>>> bceea69806d
>>> * 76ea9755b6 2019/03/10 Peter Bennett : Playback: Fix jerkiness with 
>>> codec-deinterlaced content
>>> * 13f5fd8307 2019/03/10 Peter Bennett : Playback: Improve "Music 
>>> Choice" detection
>>> * bceea69806 2019/03/10 Peter Bennett : AVSync2: Use frame 
>>> timestamps to determine elapsed play time
>>> * 90468ec49a 2019/03/10 Peter Bennett : Playback: AvSync2 fix fast 
>>> forward/rewind
>>>
>>> bceea69806 did introduce jerkiness and that was fixed the same day 
>>> in a later commit 76ea9755b6.
>>> Also the compile error was fixed in 60cfb7c05a.
>>>
>>> Please try a version after 60cfb7c05a
>>>
>>> Peter
>>> _______________________________________________
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>>> http://lists.mythtv.org/mailman/listinfo/mythtv-users
>>> http://wiki.mythtv.org/Mailing_List_etiquette
>>> MythTV Forums: https://forum.mythtv.org
>>
>> Thanks for the response.
>>
>> I have retested against the version pre change v30.0-28-g60cfb7c05a 
>> and the latest v30.0-38-g3af3cad3d7.
>>
>> The early version works fine but the latest is jittery using Avsync2 
>> VDPAU High Quality. I record from both satellite and terrestrial 
>> which have different bit rates. The best quality picture across the 
>> two types is now produced by  Avsync2 OpenGL High Quality.
>>
>> MythTV Version : v30.0-28-g60cfb7c05a
>> Playback silky smooth as shown by a news ticker using VDPAU High 
>> Quality for both Avsync 1 and Avsync2
>> 572 instances per minute of Frame X is in use by avlib and so is 
>> being held for later discarding
>>
>> -----------------------------------------------------------
>> MythTV Version :v30.0-38-g3af3cad3d7
>> Playback jerky using Avsync2 VDPAU High Quality
>> 584 instances per minute of Frame X is in use by avlib and so is 
>> being held for later discarding
>> So presume the above message is not significant.
>>
>> Playback smooth using Avsync1 VDPAU High Quality
>> 160 instances per minute of Frame X is in use by avlib and so is 
>> being held for later discarding
>>
>> Playback smooth using Avsync2 OpenGL High Quality
>> No error messages
>>
>> Playback smooth using Avsync1 OpenGL High Quality
>> No error messages
>>
>> I will clear my git local store and do a full rebuild tomorrow just 
>> to check.
>>
>>
>
> I have tried various videos with the latest MythTV version and -v 
> playback and do not see that "avlib in use" message at all.
>
> I have one TV series which is a British series (Midsomer murders) from 
> a USA channel (ovation). Using VDPAU it is very choppy, almost 
> unwatchable. I changed the display refresh rate from 60 to 50 and that 
> is a great improvement. Changing from VDPAU to OpenGL Slim is a 
> further improvement.
>
> Is your video interlaced? Double rate deinterlacers need a refresh 
> rate double the frame rate.
>
> Also check your driver version. You can get newer driver versions for 
> ubuntu from the ppa:
>
> sudo add-apt-repository ppa:graphics-drivers/ppa
>
> Try the latest driver that is available from there.
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://lists.mythtv.org/mailman/listinfo/mythtv-users
> http://wiki.mythtv.org/Mailing_List_etiquette
> MythTV Forums: https://forum.mythtv.org

Thanks. I tried the Ubuntu 19.04 beta which has Nvidia 418.56.

Playback is identical with the same messages.

Tried latest master - the same.

Tried nvdec on latest master - perfect.

So I can use nvdec or opengl high quality with no downside, so the issue 
is possibly unique to my configuration and not worth pursuing unless 
others report it.

For the record, the stream info is:-

Input #0, mpegts, from '/media/library/TV/livetv/9921_20190325155058.ts':
   Duration: 01:09:03.44, start: 11524.027933, bitrate: 8283 kb/s
   Program 1
     Stream #0:0[0x1388]: Video: h264 (High) ([27][0][0][0] / 0x001B), 
yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 
tbr, 90k tbn, 50 tbc
     Stream #0:1[0x138c](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 
0x0006)
     Stream #0:2[0x138b](eng,eng): Subtitle: dvb_teletext ([6][0][0][0] 
/ 0x0006)
     Stream #0:3[0x1389](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 
48000 Hz, stereo, fltp, 192 kb/s