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Can't record from composite.

 

 

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greg33 at blueyonder

Oct 26, 2005, 8:46 AM

Post #1 of 4 (2065 views)
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Can't record from composite.

Hi.

I've just got my mythtvbox up and running but i have a problem with it.

i'm using a a wintv pvr 350 card which seems to working fine because i
can watch my old videotapes and satellite tv through it but i can't
record from s-video composite or tuner. when i press "r" while watching
it just says "record" at the top of the screen but nothing actually records.

My main reason for building this machine was to record from an external
vcr and satellite receiver so i haven't downloaded any xmltv channels lists.

Does mythtv support recordings from external sources? if so, what could
i be doing wrong?

Thanks in advance.

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mtdean at thirdcontact

Oct 26, 2005, 9:47 AM

Post #2 of 4 (1988 views)
Permalink
Re: Can't record from composite. [In reply to]

Greg Burke wrote:

> I've just got my mythtvbox up and running but i have a problem with it.
>
> i'm using a a wintv pvr 350 card which seems to working fine because i
> can watch my old videotapes and satellite tv through it but i can't
> record from s-video composite or tuner. when i press "r" while
> watching it just says "record" at the top of the screen but nothing
> actually records.

MythTV is a PVR that records programs based on guide listings.
Therefore, the "R" key simply requests recording of the current
program. If you don't have any guide data, there is no current program,
so it doesn't do anything.

SVN has something of an "instant timer record" feature where pressing
"R" when there is no program info will start recording for 60 minutes
and then you can adjust the end time as desired. However, you're better
off doing it correctly--using a Manual Recording rule.

See http://www.gossamer-threads.com/lists/mythtv/commits/153279#153279

> My main reason for building this machine was to record from an
> external vcr and satellite receiver so i haven't downloaded any xmltv
> channels lists.

So, why not just:

dd if=/dev/video0 of=~/BabysFirstBirthday.mpg bs=64k

for the VCR. Myth really isn't providing any benefit here--may actually
be making things much harder. The satellite, on the other hand, should
be set up with guide data and an appropriate control mechanism (i.e. IR
blaster/serial link--see the archives
http://www.gossamer-threads.com/lists/mythtv/ ).

Mike
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mercury.morris at gmail

Oct 27, 2005, 2:28 PM

Post #3 of 4 (1946 views)
Permalink
Re: Can't record from composite. [In reply to]

On 10/26/05, Greg Burke <greg33 [at] blueyonder> wrote:
>
> Hi.
>
> I've just got my mythtvbox up and running but i have a problem with it.
>
> i'm using a a wintv pvr 350 card which seems to working fine because i
> can watch my old videotapes and satellite tv through it but i can't
> record from s-video composite or tuner. when i press "r" while watching
> it just says "record" at the top of the screen but nothing actually
> records.
>
> My main reason for building this machine was to record from an external
> vcr and satellite receiver so i haven't downloaded any xmltv channels
> lists.
>
> Does mythtv support recordings from external sources? if so, what could
> i be doing wrong?
>
> There is another way, besides the SVN instant-record feature, to record
from the Composite input of the PVR-350. I'll describe what I did, for what
it might be worth to you.

Using the Backend Setup, usually called mythtv-setup, I defined a Video
Source called 4DTV. (In the U.S., a 4DTV is a satellite receiver.)

Again using the Backend Setup, under Input Connections I associated 4DTV
with the "Composite 0" entry.

Again using Backend Setup, I entered the Channel Editor and defined a new
channel. It is easy to miss filling in all the blanks on the screen here. I
filled in the Video Source as 4DTV. Arbitrarily, I filled in Channel Name as
W4DTV, and filled in the Call Sign as WSAT.

Now, the 4DTV Satellite Receiver is defined to MythTV as Channel WSAT.
There are no program listings for it in my system, so I use Manual Recording
to first select the Channel called WSAT, then set the Start
Time/Date/Length, etc.
The 4DTV Satellite Receiver has a VCR-like programability, so it is not too
difficult to set both MythTV and the 4DTV to turn on at the same time, tune
their respective channels, and end up with recorded program(s) from the
satellite dish.

To some, all of the above might sound complicated, but the MythTV system
just took the place of several VCRs that were also programmed to record from
the satellite dish by coordinating the start-stop times of the receiver and
VCR.

--
MM


mtdean at thirdcontact

Oct 27, 2005, 6:27 PM

Post #4 of 4 (1962 views)
Permalink
Re: Can't record from composite. [In reply to]

Mercury Morris wrote:

> On 10/26/05, *Greg Burke* <greg33 [at] blueyonder
> <mailto:greg33 [at] blueyonder>> wrote:
>
> Hi.
>
> I've just got my mythtvbox up and running but i have a problem
> with it.
>
> i'm using a a wintv pvr 350 card which seems to working fine because i
> can watch my old videotapes and satellite tv through it but i can't
> record from s-video composite or tuner. when i press "r" while
> watching
> it just says "record" at the top of the screen but nothing
> actually records.
>
> My main reason for building this machine was to record from an
> external
> vcr and satellite receiver so i haven't downloaded any xmltv
> channels lists.
>
> Does mythtv support recordings from external sources? if so, what
> could
> i be doing wrong?
>
> There is another way, besides the SVN instant-record feature, to
> record from the Composite input of the PVR-350.
> ...
> There are no program listings for it in my system, so I use Manual
> Recording

Right. The correct way--in either SVN or any previous version--is using
a Manual Recording rule. The "R" key won't work without listings.
However, SVN adds a new, "more intuitive" way that's less correct--and
less useful--for the reasons quoted in Bruce's commit (at the link I
posted):

http://www.gossamer-threads.com/lists/mythtv/commits/153279#153279

I guess I never explicitly said that the manual recording works in
previous versions, but I was trying to imply that it's always correct
(and assumed that the existence of manual recording rules in previous
versions would be enough to allow the reader to jump to the conclusion
that approach works in previous versions).

Mike
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