[mythtv-commits] Ticket #11184: Rewrite DVB profiles to filter unwanted streams instead of looking for expected streams

[MythTV]

#11184: Rewrite DVB profiles to filter unwanted streams instead of looking for
expected streams
--------------------------------+-------------------------------
 Reporter:  stuartm             |          Owner:  Klaas de Waal
     Type:  Developer Task      |         Status:  assigned
 Priority:  minor               |      Milestone:  needs_triage
Component:  MythTV - Recording  |        Version:  Master Head
 Severity:  medium              |     Resolution:
 Keywords:                      |  Ticket locked:  0
--------------------------------+-------------------------------

Comment (by Klaas de Waal):

 I did not even know this option existed... However, it looks like the
 problem as described here has been solved already.

 Configure recordings to use the MyGica? T230 USB tuner which is a
 "DVB-T/S/C, ATSC or ISDB-T Tuner Card" device. Select "Hardware DVB
 Encoders" profile "Low Quality" and changed the "Recording Type" to "Audio
 Only".

 Recording a TV program (audio plus video) with this profile then results
 in a file with only the audio; the video is filtered out. This is the
 expected result.

 Select "Hardware DVB Encoders" profile "Low Quality" and changed the
 "Recording Type" to "TV Only". Recording a radio program (audio only) with
 this profile then results in a file with only audio. No error messages
 because of a missing video stream, as indicated in the ticket.

 Therefore I think this ticket can be closed.

 There are some other remarks to be made about the Recording Profile
 feature.

 I think the best approach is to always record the complete program and at
 playback time decide which streams to use. I do not see any real
 advantage, other than a minimal space saving, of filtering out some of the
 streams when making the recording. The disadvantage is clearly that, when
 playing back, you might want the stream that has been filtered out.

 There is one interesting feature and that is the "Record Full TS" option
 which is documented in the help text to generate an additional".ts.raw"
 file which then has the full contents of the transport stream. However, it
 does not record the complete transport stream but it does add the complete
 PSI information (NIT, SDT, PAT, PMT etc) of the transport stream to the
 recording. This is useful because it is easier to do than make a full MPTS
 recording, it is much smaller and it does have all the information needed
 for debugging.

 It is possible to generate a new profile in addition to "Default", "Live
 TV", "High Quality" and "Low Quality". However, I could not find a way to
 select the new profile in the "Storage Options", first entry, when making
 a recording.

-- 
Ticket URL: <https://code.mythtv.org/trac/ticket/11184#comment:4>
MythTV <http://www.mythtv.org>
MythTV Media Center