mythtv at cvs
Nov 25, 2009, 6:40 AM
Post #1 of 12
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Ticket #7659: Determine audio properties from recorded file instead of schedule data
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#7659: Determine audio properties from recorded file instead of schedule data
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Reporter: doug@… | Owner: ijr
Type: patch | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - General | Version: head
Severity: medium | Mlocked: 0
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Hi All,
I found that the audio properties (e.g. Dolby, Stereo, etc) in my schedule
data were often different from the actual content of my recorded files.
This is a patch to update the audio properties after a recording finishes
with the values that are in the file as opposed to the ones passed from
the listings source.
The patch includes a new class called AudioPropsGenerator which works
similarly to PreviewGenerator. It takes a ProgramInfo and will then
determine the AudioProperties in the current thread or a new thread. I've
also updated tv_rec.cpp to call this Generator after a recording ends.
Finally, each decoder (avformatdecoder, nuppeldecoder, etc) is responsible
for doing the actual work of determining the audio properties. The
generator then takes the new value and updates the db.
There are a few open issues (mainly around my ignorance):[[BR]]
1. I don't know too much about audio processing, so I guessed that the
speaker layout is a good proxy for determining the audio props. This
seems to prove true for my test cases, but I don't know if this applies to
everyone.
[[BR]]
2. I don't know too much about the hard hearing properties so I guessed on
that too.
[[BR]]
3. I don't know what the visual impair property is so I ignored it
[[BR]]
4. I don't have any recorders that use the nuppledecoder so I wrote the
code, but I couldn't test it.
[[BR]]
Thanks! [[BR]]
Doug
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Ticket URL: <http://svn.mythtv.org/trac/ticket/7659>
MythTV <http://www.mythtv.org/>
MythTV
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