[mythtv-users] pre/post roll not working even though multiple free tuners and multi-rec even with just two back to back

Jim lists at morton.hrcoxmail.com
Fri Mar 2 20:05:50 UTC 2018

On 3/2/2018 1:10 PM, Mitch Capper wrote:
> Running into a problem that even though there are an abundance of 
> tuners w/ multi rec for the same source at the same priority have 
> pre/post roll settings ignored if there back to back recordings.
> Running v30-Pre-439-gb3fe5d4257-dirty looked through the more recent 
> commits but it doesn't seem there has been anything related to 
> scheduling of this in the last month.
> I have a hdhomerun quad with each input set as having 2 extra virtual 
> tuners for multi-rec resulting in 12 tuners. Looking at the capture 
> card table they all have equal 
> recpriority(1),quicktune(2),livetvorder(1), and reclimit(3), The 
> primary for each of the four has a schedule order of 2, the virtuals 
> are 0  and all attached to the same video source.   I have a 
> RecordPreRoll at 30 seconds and RecordOverTime at 161.   It only 
> records are 4 primary channels, and even when there are just two back 
> to back recordings it can ignore the pre/post rolls.
> I was under the impression with multi-rec it was meant to specifically 
> handle situations like this (much less the fact there excess tuners 
> available).
> I updated the displayname to rename each virtual tuner to a diff 
> display name to try and verify it isn't using them.
> I started mythbackend with -v schedule then scheduled something to 
> record right after something else on the same channel.  It picked the 
> same tuner to use even though none of the other 11 were in use.   The 
> log does not really show much about tuner selection.
> If anyone has more direction great, otherwise I can start digging into 
> the code.
> ~mitch

You need to set "Avoid Back-to-back recordings" to Always. Then you will 
get the pre/post roll.
Whenever you have back-to-back recordings the pre and post roll do not 


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