[linux-dvb] soft demux device

[linux-dvb] soft demux device

[ozgur cagdas]

Hi All,

I have just compiled v4l-dvb successfully. My aim is to develop some experimental dvb applications on top of this dvb kernel api. Initially, I do not want to use any hardware and would like to play with the recorded ts files I have. So, is there any software demux device available within this package or somewhere else? If so, how can I load this device and make it work on a given ts file circularly? On the other hand, I have no /dev/dvb node  at the moment, so should I do anything for this or would loading the driver create it automatically?

Thanks in advance.

Cheers,

Ozgur.


      

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Re: [linux-dvb] soft demux device

[Andy Walls]

On Tue, 2010-02-23 at 05:12 -0800, ozgur cagdas wrote:
> Hi All,
> 
> I have just compiled v4l-dvb successfully. My aim is to develop some
> experimental dvb applications on top of this dvb kernel api.
> Initially, I do not want to use any hardware and would like to play
> with the recorded ts files I have. So, is there any software demux
> device available within this package or somewhere else?

I do not know.  You could write a simple dvb_dummy driver module.  The
existing dvb_dummy_fe module would be helpful in such an endeavor, I
suppose.


>  If so, how can I load this device and make it work on a given ts file
> circularly?

Writing the TS to the /dev/dvb/adapter0/dvr0 device would be the way to
replay an existing TS file, IIRC.


>  On the other hand, I have no /dev/dvb node  at the moment, so should
> I do anything for this or would loading the driver create it
> automatically?

A dvb driver being loaded and registering should cause those to be
created automatically.

Regards,
Andy

Re: [linux-dvb] soft demux device

[Manu Abraham]

On Tue, Feb 23, 2010 at 6:34 PM, Andy Walls <awalls@radix.net> wrote:
> On Tue, 2010-02-23 at 05:12 -0800, ozgur cagdas wrote:
>> Hi All,
>>
>> I have just compiled v4l-dvb successfully. My aim is to develop some
>> experimental dvb applications on top of this dvb kernel api.
>> Initially, I do not want to use any hardware and would like to play
>> with the recorded ts files I have. So, is there any software demux
>> device available within this package or somewhere else?
>
> I do not know.  You could write a simple dvb_dummy driver module.  The
> existing dvb_dummy_fe module would be helpful in such an endeavor, I
> suppose.

Indeed, that's the right way :-)

Regards,
Manu

Re: [linux-dvb] soft demux device

[Roland Mieslinger]

Hi,

> I have just compiled v4l-dvb successfully. My aim is to develop some experimental dvb applications on top of this dvb kernel api. Initially, I do not want to use any hardware and would like to play with the recorded ts files I have. So, is there any software demux device available within this package or somewhere else? If so, how can I load this device and make it work on a given ts file circularly? On the other hand, I have no /dev/dvb node  at the moment, so should I do anything for this or would loading the driver create it automatically?
> 
> Thanks in advance.
> 
> Cheers,
> 
> Ozgur.

maybe this is a good starting point for you:

 "I wrote a Linux kernel module which provides one or more 
  virtual DVB adapters. When loaded, it creates a char device 
  of the form /dev/dvbloop<num> for every virtual DVB adapter.
  All Transport Stream packets written to a char device will
  be delivered on the corresponding virtual DVB adapter.

  You can get the sources at
  http://cpn.dyndns.org/projects/dvbloop.shtml

  Maybe somebody finds it useful.

  Cheers,
  Christian.
  -- 
  Christian Praehauser"

the link seems to be outdated, but the following is still
working https://svn.baycom.de/repos/dvbloop/.

A S2API patch is out as well:
http://www.vdrportal.de/board/attachment.php?attachmentid=24024

I've no idea if this is working well or not, I'm not using it myself.
YMWV

Roland

Re: [linux-dvb] soft demux device

[ozgur cagdas]

Hi,

Thanks very much for the previous information. To give it a go just as it is, I've loaded dvb_dummy_fe module manually and many other modules including dvb_core as well, but no hope, don't have /dev/dvb folder yet. As I've mentioned earlier, I do not have a hardware at the moment, so I should trigger loading of proper modules manually. In my scenario, which modules should I load? Any simple set of modules that'd create necessary /dev/dvb/ and subsequent would do for me. If it matters, I am using 2.6.31 kernel and ubuntu 9.10 distribution.

Cheers,

Ozgur.


      

_______________________________________________
linux-dvb users mailing list
For V4L/DVB development, please use instead linux-media@vger.kernel.org
linux-dvb@linuxtv.org
http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb

Re: [linux-dvb] soft demux device

[Andy Walls]

On Wed, 2010-02-24 at 03:57 -0800, ozgur cagdas wrote:
> Hi,
> 
> Thanks very much for the previous information. To give it a go just as
> it is, I've loaded dvb_dummy_fe module manually and many other modules
> including dvb_core as well, but no hope, don't have /dev/dvb folder
> yet. As I've mentioned earlier, I do not have a hardware at the
> moment, so I should trigger loading of proper modules manually. In my
> scenario, which modules should I load? Any simple set of modules
> that'd create necessary /dev/dvb/ and subsequent would do for me. If
> it matters, I am using 2.6.31 kernel and ubuntu 9.10 distribution.

See my dvb_dummy_adapter patch I just posted to the list.

Regards,
Andy

> Cheers,
> 
> Ozgur.
> 
> 
>       
> 
> _______________________________________________
> linux-dvb users mailing list
> For V4L/DVB development, please use instead linux-media@vger.kernel.org
> linux-dvb@linuxtv.org
> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> 

Re: [linux-dvb] soft demux device

[ozgur cagdas]

Lovely! It worked straight away, at least happily created the nodes :) I'm hoping to give an update after I manage to find sometime to play with it.

On the other hand, as a small note, I've applied your patch ( http://permalink.gmane.org/gmane.linux.drivers.video-input-infrastructure/16540 ) on top of the latest hg clone but linux/drivers/media/dvb/Makefile patch failed. It's a very simple patch to apply manually though.

Cheers,

Ozgur.



----- Original Message ----
From: Andy Walls <awalls@radix.net>
To: linux-media@vger.kernel.org
Cc: linux-dvb@linuxtv.org
Sent: Wed, February 24, 2010 1:22:32 PM
Subject: Re: [linux-dvb] soft demux device

On Wed, 2010-02-24 at 03:57 -0800, ozgur cagdas wrote:
> Hi,
> 
> Thanks very much for the previous information. To give it a go just as
> it is, I've loaded dvb_dummy_fe module manually and many other modules
> including dvb_core as well, but no hope, don't have /dev/dvb folder
> yet. As I've mentioned earlier, I do not have a hardware at the
> moment, so I should trigger loading of proper modules manually. In my
> scenario, which modules should I load? Any simple set of modules
> that'd create necessary /dev/dvb/ and subsequent would do for me. If
> it matters, I am using 2.6.31 kernel and ubuntu 9.10 distribution.

See my dvb_dummy_adapter patch I just posted to the list.

Regards,
Andy

> Cheers,
> 
> Ozgur.
> 
> 
>      
> 
> _______________________________________________
> linux-dvb users mailing list
> For V4L/DVB development, please use instead linux-media@vger.kernel.org
> linux-dvb@linuxtv.org
> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> 


_______________________________________________
linux-dvb users mailing list
For V4L/DVB development, please use instead linux-media@vger.kernel.org
linux-dvb@linuxtv.org
http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb