"Off air" screen still displayed when channels comes "on air"

[Ash Bostock <abostock@…>]

In the UK we have several channels on Freeview which are only available between certain times. During the "off air" hours myth correctly displays the MHEG page showing when that channel will be back "on air".

I have a recent recording which was the first "on air" timeslot for that day and when playing it back it displays the "off air" MHEG page during the whole thing while the actual show is playing in the background.

I haven't yet tested it on another new recording (to see if it does the same thing again) but can do so if required.

[stuartm]

For reference, this was first fixed nearly two years ago with this commit - ​http://svn.mythtv.org/trac/changeset/11598

I can only assume there has been a regression since or that the channel in question has changed their methods or it was just a one off broadcast error.

It would be helpful if someone could confirm this is a repeatable problem, name the channel in question and be prepared to provide a sample recording.

[Ash Bostock <abostock@…>]

I'll try with a few more recordings to see if it does the same thing again and report back. The recording mentioned in the ticket was from UK TV History.

[Ash Bostock <abostock@…>]

Tried another recording this morning (on the same channel) and the same problem occurred. In terms of providing a sample recording what is the best way of doing that being that the resulting files are quite large? Should I cut a current recording down to a few seconds/minutes, if so what tool to use for that? or should I just setup a manual 1min schedule instead? Also any suggestions where I can host such a file?

Thanks.

[David Matthews <dm@…>]

I've only just had a chance to look at this but I can't reproduce it on recordings of UK TV History coming on air made over the last few days. A recording made with 0.21 did not show any off-air logo at all and simply started with the programme. This is probably because with 0.21 there is no timing information when there are just DSMCC tables and no video or audio. I also tested by recording with 0.20 which records a "dummy video" stream along with the DSMCC. This does play the off-air logo until the programme begins. However, when played using 0.21 the off-air logo is correctly cleared when the programme begins as a result of the changes added in changeset 11598.

It is possible that the way the broadcaster signals coming on-air has changed since this was reported but unless this can be demonstrated with the current version of Myth I'm reluctant to investigate further.

David

[stuartm]

I can't reproduce this either.