Re: Bah! How do I change channels?

[Robert Vincent Krakora <rob.krakora@messagenetsystems.com>]

Devin Heitmueller wrote:
> On Fri, Jun 26, 2009 at 1:28 PM, Robert
> Krakora<rob.krakora@messagenetsystems.com> wrote:
>   
>> Yes, it is run after mplayer initially tunes it.  However, what is the
>> difference between mplayer tuning and v4l-ctl tuning?  They are both
>> submitting the same IOCTLs to the driver to accomplish the same end
>> result; or is mplayer probably submitting some additional IOCTLS to
>> "wake" the device?
>>     
>
> The issue is that the tuner gets powered down when the v4l device is
> closed.  So, when running mplayer first, and then v4l-ctl is being
> used to tune, the file handle is held active by mplayer.  But if you
> run v4l-ctl first, the v4l-ctl opens the handle, tunes successfully,
> and then closes the handle (which powers down the tuner).  Then when
> running mplayer (or whatever app), the handle gets reopened but the
> tuner is not tuned to the target frequency that v4l-ctl set.
>
> Devin
>
>   
Aaahh yes...I think that you have told me that once before...sorry for 
making you repeat yourself...

However, with ivtv-tune I can issue a tune to a channel and then open 
mplayer with no tuning parameters and that channel is playing...

-- 
Rob Krakora
Senior Software Engineer
MessageNet Systems
101 East Carmel Dr. Suite 105
Carmel, IN 46032
(317)566-1677 Ext. 206
(317)663-0808 Fax