[mythtv-users] Help with playback issue on recordings from a single channel

[Vincent Poore]

 So yesterday was not a good day to lock up my machine so I didn't test ffmpeg on the sample I uploaded.   Honestly I was worried 6 minutes wasn't going to be enough but I tried it today and it did lock up my machine about three or four minutes in.  I got impatient and switched away from terminal while it was running so I don't have the exact timestamp/frame where it locked up.   I can do it again if this would be helpful.
Please try 
ffmpeg -i 1504_20211225153600.ts  -vcodec libx264 -crf 24 -tune film -acodec copy 1504_20211225153600.libx264.ts

and let me know if it completes.
Since mine locks up, does this mean there is a bug in my AMD CPU?
I notice this in my output:
[libx264 @ 0x5567615eaac0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX XOP FMA3 BMI1



    On Saturday, December 25, 2021, 03:25:36 PM MST, Klaas de Waal <klaas.de.waal at gmail.com> wrote:  
 
 

On Sat, 25 Dec 2021 at 22:33, Yeechang Lee <ylee at columbia.edu> wrote:

Vincent Poore says:
> 1504_20211225153600.ts

I see no problems with playback or seeking on MacBook Pro running 0.30 (MPEG2 ffmpeg decoder, OpenGL renderer), and Nviia Shield TV running 0.31-Pre (Mediacodec decoder, OpenGL renderer) and Leanback 0.203. (I can't test on VDA because my MythFrontend doesn't use it, for some reason.)


The clip plays back here OK, with software decoding as mentioned but also on an Nvidia GT1030 with VDPAU decoding and also on Intel with VAAPI decoding.Because the clip plays OK on Nvidia with hardware decoding this eliminates the possibility of a Nvidia hardware decoding bug being an issue here.However, on Intel with VAAPI decoding and double rate High Quality deinterlacing there are many messages about interop de-interlacers being created and destroyed every few seconds. This is possibly not correct; it could be that the stream parsing code that decides on the interfacing is not stable for this stream.
However, all messages about interop de-interlacers being created and destroyed disappear when going back to single-rate deinterlacing.I suggest disabling double rate de-interlacing and start with a low quality single-rate deinterlacer and see how it goes. Then increase quality settings as needed and as long as it still plays good. This can be configured in Setup / Video / Playback / Current Video Playback Profile / formats > VAAPI / Deinterlacer quality (double rate).



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