Hi list,
I have some sort of annoyance to report, which persists iirc since vdr-1.3.16 (the version, where the audio-menu appeared ?!). But as far as I can see, I'm the only one having a problem like this:
When switching channels, the first two or three seconds give me disturbed video and audio (ie. stuttering and freezing). It doesnt matter which transponder/multiplex I use, the behavior remains. STR + SNR are always near 70-90%.
I use a DVB-T Twinhan-FTA DVB-T-card. The drivers I use are usually from CVS and updated quite frequently by myself. First I thought its related to my Twinhan card, but even though I had to replace the card (it broke, a warranty-issue) and borrowed a Hauppauge Nova T the problem remained. I use the dxr3-card as output via vdr-dx3plugin.
So my questions is: Could there be any relation between my disturbed video+audio and the changes made for vdr-1.3.16 ? Has anyone seen a behavior like this ? Any cure ?
--- Regards, Martin Cap
Hi,
On Sat, 10 Dec 2005 18:20:35 +0100 Martin Cap macap20001@compuserve.de wrote:
I use a DVB-T Twinhan-FTA DVB-T-card. The drivers I use are usually from CVS and updated quite frequently by myself. First I thought its related to my Twinhan card, but even though I had to replace the card (it broke, a warranty-issue) and borrowed a Hauppauge Nova T the problem remained. I use the dxr3-card as output via vdr-dx3plugin.
So my questions is: Could there be any relation between my disturbed video+audio and the changes made for vdr-1.3.16 ? Has anyone seen a behavior like this ? Any cure ?
Yes, I get this with dxr3 too. It is clearly an issue with the dxr3 plugin. I thought it had something to do with the hardware decoder catching up with the input stream that is being changed quickly. I think I used 1.3.15 at some point, but I can't recall if it behaved the same way (the dxr3 plugin was in a bad shape at that time anyway). Has it actually worked better in the past for you?
-- Niko Mikkilä
Niko Mikkila wrote:
Hi,
I use a DVB-T Twinhan-FTA DVB-T-card. The drivers I use are usually from CVS and updated quite frequently by myself. First I thought its related to my Twinhan card, but even though I had to replace the card (it broke, a warranty-issue) and borrowed a Hauppauge Nova T the problem remained. I use the dxr3-card as output via vdr-dx3plugin.
So my questions is: Could there be any relation between my disturbed video+audio and the changes made for vdr-1.3.16 ? Has anyone seen a behavior like this ? Any cure ?
Yes, I get this with dxr3 too. It is clearly an issue with the dxr3 plugin. I thought it had something to do with the hardware decoder catching up with the input stream that is being changed quickly. I think I used 1.3.15 at some point, but I can't recall if it behaved the same way (the dxr3 plugin was in a bad shape at that time anyway). Has it actually worked better in the past for you?
Hi Nikko,
no, sadly it has not worked out better for me in the past. Things remained bad. What I find strange is, that at the time of vdr-1.3.15 Manu Abraham from the dvb-mailinglist introduced some changes to the twinhan-dvb-code which improved the whole "interference"-thing. It worked well for me (no disturbance at all!). I ran 1.3.15 at that time, before that, I had disturbed video+sound. Actually, the reason why Manu Abraham started to improve the twinhan-code were these interferences. Suddenly, after switching to 1.3.16 (I clearly remember) things got worse again.
Nevertheless, you could be right. This could be worth posting on the dxr3plugin-mailing list to hear dxr3-user experiences.
Thanks for your valuable comment.
--- Regards, Martin Cap
On Sat, 2005-12-10 at 19:23 +0100, Martin Cap wrote:
Nevertheless, you could be right. This could be worth posting on the dxr3plugin-mailing list to hear dxr3-user experiences.
For me, channel switching with a TT DVB-C budget card + DXR3 has always (been using this setup for about 14 months or so, almost always with the latest VDR 1.3.x version) looked something like: half a second black screen, no sound, then picture and audio normally for about half a second, then frozen picture + sometimes pixelation and stuttering audio for a few tenths of a second, then everything ok.
I haven't ever found this overly irritating though (but patches of course welcome if someone finds a fix); the quick experiments I've done with the Xine plugin + fbxine with DXR3 and its "slow motion" behaviour for roughly a second or so when switching channels have annoyed me more. Dunno if these two issues with the different plugins have something in common...?
Ville Skyttä wrote:
For me, channel switching with a TT DVB-C budget card + DXR3 has always (been using this setup for about 14 months or so, almost always with the latest VDR 1.3.x version) looked something like: half a second black screen, no sound, then picture and audio normally for about half a second, then frozen picture + sometimes pixelation and stuttering audio for a few tenths of a second, then everything ok.
Try to disable channel updates. Does this fix the stuttering? I'm seeing a similar effect on my FF card for some channels. After tuning them, some update to the channel is made by VDR, causing a re-tune.
Cheers,
Udo
On Sun, 2005-12-11 at 00:22 +0100, Udo Richter wrote:
Ville Skyttä wrote:
For me, channel switching with a TT DVB-C budget card + DXR3 has always (been using this setup for about 14 months or so, almost always with the latest VDR 1.3.x version) looked something like: half a second black screen, no sound, then picture and audio normally for about half a second, then frozen picture + sometimes pixelation and stuttering audio for a few tenths of a second, then everything ok.
Try to disable channel updates. Does this fix the stuttering?
No effect, it seems.
Ville Skyttä wrote:
For me, channel switching with a TT DVB-C budget card + DXR3 has always (been using this setup for about 14 months or so, almost always with the latest VDR 1.3.x version) looked something like: half a second black screen, no sound, then picture and audio normally for about half a second, then frozen picture + sometimes pixelation and stuttering audio for a few tenths of a second, then everything ok.
Try to disable channel updates. Does this fix the stuttering?
No effect, it seems.
Same for me...
--- Regards, Martin Cap
On Saturday 10 December 2005 21:55, Ville Skyttä wrote:
For me, channel switching with a TT DVB-C budget card + DXR3 has always (been using this setup for about 14 months or so, almost always with the latest VDR 1.3.x version) looked something like: half a second black screen, no sound, then picture and audio normally for about half a second, then frozen picture + sometimes pixelation and stuttering audio for a few tenths of a second, then everything ok.
Same here except if I change channel by pressing up or down -- then there is no black screen in between, just pixelation and sound seems to play some sample from the last channel for a couple of ms (which is really annoying if it happens to be something loud).
Is there a real reason why it's different when typing in a channel number or is this another magical feature no one can explain?
On Sun, 11 Dec 2005 04:30:33 +0200 Jukka Tastula jukka.tastula@kotinet.com wrote:
On Saturday 10 December 2005 21:55, Ville Skyttä wrote:
For me, channel switching with a TT DVB-C budget card + DXR3 has always (been using this setup for about 14 months or so, almost always with the latest VDR 1.3.x version) looked something like: half a second black screen, no sound, then picture and audio normally for about half a second, then frozen picture + sometimes pixelation and stuttering audio for a few tenths of a second, then everything ok.
Same here except if I change channel by pressing up or down -- then there is no black screen in between, just pixelation and sound seems to play some sample from the last channel for a couple of ms (which is really annoying if it happens to be something loud).
Is there a real reason why it's different when typing in a channel number or is this another magical feature no one can explain?
I'd guess that difference comes from changing the transponder (that requires retuning with only one card) vs changing between channels in the same mux.
-- Niko Mikkilä
On Sunday 11 December 2005 04:35, Niko Mikkila wrote:
Same here except if I change channel by pressing up or down -- then there is no black screen in between, just pixelation and sound seems to play some sample from the last channel for a couple of ms (which is really annoying if it happens to be something loud).
Is there a real reason why it's different when typing in a channel number or is this another magical feature no one can explain?
I'd guess that difference comes from changing the transponder (that requires retuning with only one card) vs changing between channels in the same mux.
It's not that since if I change from yle 1 to yle 2 it's instant with channel up but there's a pause if I do it by pressing 2. Exact same thing between yle2 and mtv3, pause if I press the channel number, absolutely no pause if I press channel up.
I have two dvb-t cards in the box and I've set up the ca so that it never has to retune when switching between frequencies.
So, I'm guessing then that pressing the number key always causes a retune but channel up/down only if it is necessary.
Jukka Tastula wrote:
On Sunday 11 December 2005 04:35, Niko Mikkila wrote:
Same here except if I change channel by pressing up or down -- then there is no black screen in between, just pixelation and sound seems to play some sample from the last channel for a couple of ms (which is really annoying if it happens to be something loud).
Is there a real reason why it's different when typing in a channel number or is this another magical feature no one can explain?
I'd guess that difference comes from changing the transponder (that requires retuning with only one card) vs changing between channels in the same mux.
It's not that since if I change from yle 1 to yle 2 it's instant with channel up but there's a pause if I do it by pressing 2. Exact same thing between yle2 and mtv3, pause if I press the channel number, absolutely no pause if I press channel up.
I have two dvb-t cards in the box and I've set up the ca so that it never has to retune when switching between frequencies.
So, I'm guessing then that pressing the number key always causes a retune but channel up/down only if it is necessary.
There is no difference in the way channels are switched. The pause you are observing when entering a digit is the time VDR waits for more digits (DIRECTCHANNELTIMEOUT in menu.c).
Since when entering a digit the channel display comes up, maybe that's what disturbs the DXR3 device?
In order to test this you could try commenting out all
displayChannel->Flush();
lines in menu.c.
Klaus
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Jukka Tastula -
Klaus Schmidinger -
Martin Cap -
Niko Mikkila -
Udo Richter -
Ville Skyttä