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Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.

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mythtv at cvs

Nov 17, 2009, 3:54 AM

Post #1 of 8 (822 views)
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Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.

#7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.
------------------------------+---------------------------------------------
Reporter: J.Pilk@… | Owner: ijr
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - General | Version: unknown
Severity: medium | Mlocked: 0
------------------------------+---------------------------------------------
Please see http://www.gossamer-threads.com/lists/mythtv/users/404383

I'm attaching another set of snippets from mythburn.log

The DVD creation completes but the result isn't usable. Since going to
0.22 this has become a real problem. I'm preprocessing with mencoder,
which also had a recent update, but I don't know where the critical change
lies.

The original recording and the demuxed stream0.mp2 file play with only
momentary glitches. Cutting out about 3 seconds using edit mode can give a
good DVD but is cumbersome.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7595>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Nov 18, 2009, 7:22 AM

Post #2 of 8 (759 views)
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Re: Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size. [In reply to]

#7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.
------------------------------+---------------------------------------------
Reporter: J.Pilk@… | Owner: ijr
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - General | Version: unknown
Severity: medium | Mlocked: 0
------------------------------+---------------------------------------------

Comment(by J.Pilk@…):

I've now got around to installing ProjectX and it seems to be working with
my (slightly hacked) version of mythburn.py. It typically (on a small
sample so far) says it has corrected a few errors, some of which are very
near the end of the mythtranscoded recordings and wouldn't really have
affected the playability of the DVD. I'll see how it goes.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7595#comment:1>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Nov 18, 2009, 10:18 AM

Post #3 of 8 (760 views)
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Re: Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size. [In reply to]

#7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.
------------------------------+---------------------------------------------
Reporter: J.Pilk@… | Owner: ijr
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - General | Version: unknown
Severity: medium | Mlocked: 0
------------------------------+---------------------------------------------

Comment(by J.Pilk@…):

Sorry, but ProjectX isn't the magic solution. I've just used it to create
a DVD with 3 input recordings which all played well. On the DVD image two
lose sound prematurely. For these the mythburn.log 'summary of created
media files' shows that the Audio file is much shorter that the Video.
Maybe I can use this to give an early warning of the problem - instead of
waiting for the entire process to complete - but the failure rate I am
seeing now is very much higher than it was in 0.21, without ProjectX, and
with several hundred disks in my archive/unstructured collection.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7595#comment:2>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Dec 21, 2009, 6:41 AM

Post #4 of 8 (625 views)
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Re: Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size. [In reply to]

#7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.
----------------------------------+-----------------------------------------
Reporter: J.Pilk@… | Owner: paulh
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: Plugin - MythArchive | Version: unknown
Severity: medium | Mlocked: 0
----------------------------------+-----------------------------------------
Changes (by paulh):

* owner: ijr => paulh
* component: MythTV - General => Plugin - MythArchive

Comment:

Not much has changed in MythArchive for a long time so no idea why 0.22
should be any different than 0.21.

I no longer use MythArchive to create DVD's so fixing any bugs especially
ones that I can't reproduce are very low on my todo list.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7595#comment:3>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Dec 21, 2009, 7:44 AM

Post #5 of 8 (621 views)
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Re: Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size. [In reply to]

#7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.
----------------------------------+-----------------------------------------
Reporter: J.Pilk@… | Owner: paulh
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: Plugin - MythArchive | Version: unknown
Severity: medium | Mlocked: 0
----------------------------------+-----------------------------------------

Comment(by J.Pilk@…):

I don't think the problem lies in the MythArchive code; it's in the
demuxer. That code hasn't changed recently, either, but something along
the line seems to have made it less robust. I'm making slow progress in
adapting posted scripts using ProjectX to do what I want before entering
MythArchive, so that any problems with a recording can be found earlier
and perhaps corrected, but as yet this isn't well integrated into Myth.
Have you stopped making DVDs, or do you use another tool to do it?

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7595#comment:4>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Feb 5, 2010, 3:22 AM

Post #6 of 8 (479 views)
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Re: Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size. [In reply to]

#7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.
----------------------------------+-----------------------------------------
Reporter: J.Pilk@… | Owner: paulh
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: Plugin - MythArchive | Version: unknown
Severity: medium | Mlocked: 0
----------------------------------+-----------------------------------------

Comment(by J.Pilk@…):

An update. I'm now using ProjectX on my raw DVB-T recordings to select
the main audio stream and apply the cutlist - ie, as a replacement for
mythtranscode - before entering MythArchive, and I no longer see this
problem. Occasionally a few frames are dropped - and usually some 'useless
B-frames' at edit points - but the process seems robust. It looks as if
my report above of data loss with ProjectX arose because I used to pre-
process all recordings with mencoder. I've seen earlier recommendations
to avoid pre-processing before ProjectX and my experience supports this.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7595#comment:5>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Apr 11, 2010, 11:31 AM

Post #7 of 8 (317 views)
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Re: Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size. [In reply to]

#7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.
----------------------------------+-----------------------------------------
Reporter: J.Pilk@… | Owner: paulh
Type: defect | Status: closed
Priority: minor | Milestone: unknown
Component: Plugin - MythArchive | Version: unknown
Severity: medium | Resolution: fixed
Mlocked: 0 |
----------------------------------+-----------------------------------------
Changes (by robertm):

* status: new => closed
* resolution: => fixed

Comment:

Reporter appears satisfied with using ProjectX (and issues like this were
a motivator in adding it as an option in the first place), closing.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7595#comment:6>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

May 9, 2010, 1:29 PM

Post #8 of 8 (278 views)
Permalink

Re: Ticket #7595: MythArchive DVD creation. Sound lost after single wrong audio frame size. [In reply to]

#7595: MythArchive DVD creation. Sound lost after single wrong audio frame size.
----------------------------------+-----------------------------------------
Reporter: J.Pilk@… | Owner: paulh
Type: defect | Status: closed
Priority: minor | Milestone: unknown
Component: Plugin - MythArchive | Version: unknown
Severity: medium | Resolution: fixed
Mlocked: 0 |
----------------------------------+-----------------------------------------

Comment(by J.Pilk@…):

My script using Project-X is at ticket #8347 and a related patch for
Mythburn.py is at #8376. Parts of this - enabling use of M2VRequantiser -
have been committed at r24416

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7595#comment:7>
MythTV <http://www.mythtv.org/>
MythTV
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