[MITIGATED] softhddevice v2.3.6 with vdr (2.6.9/2.6.9): silence or lip-sync delay after time-shift

Hi Carel,

Quote from carel

with nvdec and vdpau

how about cuvid?

And yes, it might be related, you never know. Please show debug log. What video sync mode do you use?

“play silence instead of dupping audio for all sync modes” is meant to improve the situation.

There are 2 reasons for playing silence.

Either you hear silence instead of cracking noise.

Or it is there instead of underrun, stop of audio and restart of audio and sync. Which would cause much more delay.

So I guess, that is what everybody wants.

If people prefer cracks and underruns instead of silence, I could make it configurable

But maybe there is a bug somewhere, I can't test every situation.

Quote from carel

time-shift recording starts playing back

You start a recording, and then play it, while it's still recording or something else?

Best, Jörg

Quote from carel

lip-sync delay

definitly shouldn't happen

Does it also happen with just playing back the recording without time-shift?

I have an idea for a fix. I will make a commit next week, when I am back home.

In playback the silence mechanism isn't needed cause al data are there already, so I will disable it for playback.

Ist gar nicht nötig, da bereits so eingebaut: Bei einer Aufnahme (IsReplay()) sind die Bedingungen in [1] und [2] nicht erfüllt. Und bei Beginn einer Aufnahme wird PlayRingbuffer wieder aktiviert [3].

Deswegen denke ich, es hat nichts mit meinen Änderungen zu tun.

Ein Debug-Log wäre trotzdem interessant.

Quote from carel

after resume playback

You mean after pausing and resuming playback? That's new information.

Anyway I need a debug log.

What sync mode in softhddevice you use?

Are you using some timeshift plugin/patch? And if so, which one?

What does the patch permashift give?

And where to see it?

GitHub - eikesauer/Permashift: Permanent timeshift plugin for Video Disc Recorder (VDR)

Permanent timeshift plugin for Video Disc Recorder (VDR) - eikesauer/Permashift

github.com

Description:
Permashift saves the TV channel shown live into a ring buffer in RAM.
Thus VDR can rewind from live TV or prepend video from the past to
an instant recording....

I.e. in the original VDR the timeshift is saved to disk, and with the patch to memory, is this the main difference?

And with the plugin the timeshift is always on.

Permashift gives the opportunity to rewind back in LiveTV! This is no timeshift, as timeshift is stored as as recording, this is just for the active channel in memory.

Regards Stefan