4k TV Stutter with RTSP

Discussion in 'General Support' started by AberDino, December 18, 2018.

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  1. AberDino
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    I recently bought myself a new amplifier (Denon AVR-X3500H) and decided to also upgrade to a 4K capable video card for my HTPC (ASUS GeForce GT 1030 2GB GDDR5). This card is connected to my amp via HDMI, and onward to my UHD TV. I have a separate TV server. I tuned in the Astra UHD Demo and SES UHD Demo channels and found I couldn't get smooth playback of these channels using RTSP (using LAV filters 0.73.1 with DXVA2 hardware acceleration enabled, so CPU usage is low). I then switched to the "UNC Paths" option and playback is perfect! Is this a known 'characteristic'?



    Just posting this for people who might be experiencing the same issue, but at the same time I would be happy to do further testing and submit logs for the devs if required.
     
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  3. Sebastiii
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    Hi :)
    Thanks for the report
    @Owlsroost can surely help, but it could be nice to post debug logs with RTSP and UNC for us to try to saw why :p
     
  4. kenwonders
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    I've had this for some time, UNC works fine but RTSP bad. I have never reported because I think the ethernet cable to my tv server is suspect (it goes outside, 5m cable). RTSP has no error correction, so perhaps check your network?
     
  5. AberDino
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    Thanks for the suggestion, but I've got gigabit connectivity between the TV server and the client and use a managed network switch so I can monitor the respective network ports. No packet errors are reported so I'm pretty sure the connectivity itself is fine.

    Will do when I get home tonight.
     
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  6. AberDino
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    Attached are the logs for both the RTSP and UNC options. The TsReader.log file for the RTSP option has a lot of "Audio to render too late" in it, which is indicative of the stutter.
     

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  7. Owlsroost
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    You seem to have attached two copies of the UNC logs (and no RTSP logs)?

    Also need the TV Server logs (for the RTSP situation).
     
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  8. AberDino
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    I'm sorry, I should have checked before I pressed the submit button ;). Tomorrow I'll generate a new set up RSTP logs including the TV Server.
     
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  9. AberDino
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    @Owlsroost, attached are the RTSP logs, including the TV Server log files. Let me know if I can help with anything else.
     

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