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Stuttering after some time

Added by Klaus D. over 9 years ago

Hi,

I have the problem that after some time (I guess 30-60 minutes) watching a stream with VLC it starts to stutter. If I log in to the TVH web interface and look at status/subscriptions, I see that 'output' is lower than 'input'. So, for whatever reason the stream cannot be transmitted in "real time" anymore.

When I stop the stream in VLC and immediately restart it everything is normal again for the next 30-60 minutes.

My equipment:
  • Raspberry Pi with latest TVH (4.1.12~g0e5ec2a), but also tried 3.9 with no effect on this problem
  • 2 tuners (PCTV 292e)
  • DVB-C
  • Network: TP-Link Powerline AV500 (connection/data rate is stable and well above 100 MBit )
  • Stream is http with "pass" profile
  • Client: Thinkpad T520 with VLC version 2.2.0

Do you have any ideas how I can debug this problem? Where to look at?

I am thankful for every hint as this is really annoying!

Bye,
Klaus


Replies (3)

RE: Stuttering after some time - Added by Prof Yaffle over 9 years ago

Thoughts...

  1. Does it work if you connect directly, bypassing the Powerline stuff? Could it be interference?
  2. Are there caching settings in VLC (I know they're there somewhere, and network is different to local) that make any difference?
  3. Does it happen on all channels, or only higher-bitrate ones?
  4. Is anything else streaming from the Pi at the same time? Do you have a NIC bottleneck rather than a LAN issue?
  5. (Similar to no.4) Is anything else happening that could be causing issues - IO to the SD card, RAM IO, CPU use? Anything that could slow the Pi down and make it less able to serve the streams?
  6. Is everything okay if you record the streams (just to make sure the Pi can actually keep up with the signal in the first place)?
  7. Is it okay if you record a stream and then watch it (or something else) over NFS or SMB at the same time (just wondering about the interference angle - HTSP vs a file protocol - UDP vs TCP)?
  8. Do you have a different client to test - does it work on a different laptop?
  9. (Similar to no.8) Does it work in different software, e.g. Kodi?

Not sure they're really hints, but it's where I'd start to look, at least...

RE: Stuttering after some time - Added by Klaus D. over 9 years ago

Thank you for your thoughts.

I did some random changes to my configuration and it seems that it is working now (knocking on wood).

  • I turned off debug logging to syslog (I enabled it some time ago)
  • I checked "Force old status" in adapter settings
  • I unchecked "Rewrite PAT" for the pass stream profile
  • I recompiled media_build

I don't know which of those settings is the one that fixed my problem, but it is now running stable without stuttering, but I see some continuity errors from time to time...

RE: Stuttering after some time - Added by Bogdan Serbanescu over 1 year ago

You sir are a life saver! The Force old status did it for me!
I made an account just to reply.
If anyone has stutter issues on capable hw enable this setting.
Note:I am running tvheadend inside docker.

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