[vdr] Bad audio,video and slow menu handling while recording : solved

[tho68@ssisrl.com]

Hi

I solved the problem modifying hard disk settings on my system
that's :  I forced hard disk irq unmasking with hdparm,
May be that too frequent or too long hd interrupt service
routine cause DVB system not to work properly.

Using hdparm -u1 /dev/hda I fully solved video and audio problems,
and menu handling has become slower but usable.

Angelo




On Thu, 15 Apr 2004, tho68@ssisrl.com wrote:

>
> In my previously posted message I forgot to described my environment
>
> Hardware
>
> PIII 1.0 GHz
>
> hauppauge win-tv nexus version 2.2
>
>
>
> I tested this 2 different environment :
>
> first :
>
> vdr 1.2.6
> remote-0.1.1
> kernel 2.4.23
> linux-dvb.2003-11-08
>
>
> second
>
> vdr 1.3.6
> remote-0.1.1
> kernel 2.4.23
> linuxtv-dvb-1.1.1
>
>
> I am experiencing a situation of bad audio, video and slow menu handling
> while recording and looking contemporaneously some channels.
> In my case the problem appear everytime start a recording ( both on the
> fly or though a timer ) on this channels from HotBird :
> Italia 1, Canale 5, Rete 4, Rai 3.
> The Menu handling is delayed of about ten seconds taht's :
> I press the menu key on tne remote and the menu is drawn about ten seconds
> later. If I switch to another channel while recording, on the new tuned
> channel everithing work fine ( audio video and menus ), tuning back on the
> recording channel audio, video and menus start working badly again.
> The bad behaviour of the tune channel continue too after recording end,
> the only difference is that when recording end, and i tune another channel
> and then tune back on the previously recorded channels it start working
> fine.
> I tested this with about 40 different channels and only with the four
> channels mentioned above i got the described failure.
> I noticed that the main difference between the failing channels and the
> not failing channels is the bitrate,looking at the recording files Italia
> 1, Canale 5 and Rete 4, generate file at a rate of 9-10 Megabit per
> second, while Rai 3 about 5-6 Megabit per second, all other tested less
> than 4 Megabit per second.
> Another difference is that Italia 1, Rete 4, Canale 5 seems to have two
> audio different audio tracks.
>
>
> Angelo Lambiasi
>
>
>
>
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>
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