MEncoder downmixing bug!

[GoogleCodeExporter]

What steps will reproduce the problem?

1. mencoder_usepcm = true
2. audiochannels = 2

What is the expected output? What do you see instead?

Expect 2 channels (Stereo) LPCM audio. Instead 6 channels (5.1) LPCM audio.

What version of the product are you using? On what operating system?

Universal Media Server 1.3.0 on Mac OS X 10.6.8

Please provide any additional information below.

Internal UMS.conf - # Do not change this value even if you use 2.0 speakers 
because of a MEncoder downmixing bug!

"audiochannels = 2" - audio sound like chipmunks are singing (the bug!)

The value of audiochannels should not be changed until the downmixing bug is 
fixed!

GUI should be updated - "Maximum number of audio channels to output for AC3 
re-encoding:" control should be temporarily disabled, thus preventing the 
change of the audiochannels value in the GUI.

Title of control should be changed as well from "Maximum number of audio 
channels to output for AC3 re-encoding:" to "Maximum number of audio channels 
to output for LPCM/AC3 re-encoding:", thus reflecting that both LPCM and AC3 
re-encoding take this value into consideration.

What do you intend to achieve?

PS3 downmixes 5.1 AC3 to 2.0.
PS3 does not downmix 5.1 LPCM to 2.0.

I intend to transcode and downmix a DTS track to 2.0 LPCM.

Current workaround is 5.1 AC3 by UMS ("mencoder_usepcm = false" & 
"audiochannels = 6") downmixed to 2 channels by PS3 (I have a stereo receiver)

Proposed solution is 2.0 LPCM by UMS ("mencoder_usepcm = true" & "audiochannels 
= 2")

Original issue reported on code.google.com by derrick....@gmail.com on 11 Jul 2012 at 3:39

[GoogleCodeExporter]

Is this bug still occurring in the latest version?

Original comment by subjunk on 15 Mar 2013 at 11:39

[GoogleCodeExporter]

No it is not.

Original comment by tstep...@gmail.com on 16 Mar 2013 at 7:49

[GoogleCodeExporter]

Thanks!

Original comment by subjunk on 16 Mar 2013 at 7:55

• Changed state: Fixed