[mythtvnz] Composite video recording (was Lurker in the midst.....)

[Steven Ellis]

Barry Clearwater wrote:
> Thanks Steve
> I'm assuming the mythtv method will also give me the audio dubbed into
> the mpeg file, whereas the cat /dev/video0 method will require me to
> record the audio separately and then mash them together somehow.
> I'd searched for the page you linked me to and hadn't found it so thanks
> heaps. I was only missing the step of creating a non existent channel, I
> knew in my head but seeing it described clearly helped heaps.
>   
/dev/video0 carries the mpeg stream and has both audio and video
> Another question related: those recording sky through composite video in
> may know, can I record from the composite in input at the same time as
> the card is recording tv from the receiver? ie do I effectively have two
> input devices?
>   
Sadly no. It only has a single MPEG2 encoder so you can do either tuner
or composite or svideo
> I guess the talk of ir blasters means there is some code to control the
> sky box and change channels, I could use my VCR through the composite
> video input as another device/receiver if I could use both inputs at
> once.
>   
Setting up a VCR input is quite simple.

1. Setup a new source with no epg grabber, and call it VCR

2. Map the VCR input to the composite device

3. You need to setup a null channel change script if you want to perform
timed recordings

eg on myPVR we have a file /usr/local/bin/mypvr_dont_tune.sh which just
contains

#!/bin/bash


Then create a new channel and map it onto the VCR input.


> Regards
> Barry
>
>
> On Tue, 2007-07-31 at 14:43 +1200, Steve Hodge wrote:
>   
>> On 7/31/07, Barry Clearwater <barryc@bcsystems.co.nz> wrote:
>>         I want to take a video from my VCR and digitise it through my
>>         Hauppauge
>>         350, which of course has an svideo input. I have a composite
>>         to svideo
>>         cable (maybe its the other way around?)
>>         How do I set up an input which has no channel? I need the
>>         steps 
>>         outlined, as each time I go to do this I get interrupted or
>>         hit a brick
>>         wall somewhere.
>>
>> This comes up fairly frequently on the main Myth users mailing list,
>> so you're not alone. The most common suggestion is to not use Myth for
>> this, as it's not really designed for it. With a PVR-x50 you can just
>> copy the output of the video device to a file, i.e. cat /dev/video0 >
>> recording.mpg. If you want to view it in Myth, you can use MythVideo.
>> However you can also use Myth to make the recording if you want to.
>> Instructions can be found in the wiki:
>> http://mythtv.org/wiki/index.php/S-Video/Composite_Input_Recording
>>
>> Cheers,
>> Steve
>>
>>
>>
>>     
>
>   


-- 
Steven Ellis - Technical Director
OpenMedia Limited
email   - steven@openmedia.co.nz
sales   - sales@openmedia.co.nz
support - support@openmedia.co.nz
website - http://www.openmedia.co.nz