[mythtv-users] Few seconds missing in recordings (progress with analog overlapping?)

Michael T. Dean mtdean at thirdcontact.com
Thu Oct 6 02:41:44 UTC 2011

<fixed top posting>

On 10/05/2011 02:14 PM, jeetu.golani wrote:
> On Wed, Oct 5, 2011 at 8:23 AM, Michael T. Dean wrote:
>> On 10/03/2011 01:50 AM, jeetu.golani wrote:
>>> Unfortunately the recording still had the same 3 seconds loss :(
>> This is how channel changes work.  MythTV stops the recording in
>> progress, changes channel (if necessary), and then starts a new
>> recording--which it can't actually "start" until it receives a
>> keyframe.  This all takes time--especially when you factor in the
>> hardware delays (i.e. buffering and caching performed in encoder
>> hardware, etc).  It's the exact same reason that people always complain
>> that Live TV channel changes are slow in MythTV (and the exact same
>> reason channel changes are slow in cable-/satellite-company STBs and
>> DVRs)...
>> Feel free to read up on any of the multiple threads on slow channel
>> changes in Live TV for more details.  Short answer is, though, unless
>> you have additional tuners that you can use and can use "start early"
>> and "end late" settings on all your recording rules, you're going to
>> miss those few seconds.
> Hi Mike,
> Thanks so much for writing in :)
> Well I set in an start early and end late time of 3 seconds under
> General (Advanced)

That is /not/ start early and end late.  That is "time to get a capture 
card and hard drives running".  Start early and end late are specified 
on the individual recording rules in minutes, not seconds.


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