Re: [ecasound] how to upmix mono audio to stereo?

At some point you need to copy the data in channel 1 to channel 2 via
the
-chcopy:1,2 command (was -erc:1,2).

Stuart

-----Original Message-----
From: Jason Galyon [mailto:jgalyon@email-addr-hidden]
Sent: Friday, 1 May 2009 6:33 AM
To: ecasound-list@email-addr-hidden
Subject: Re: [ecasound] how to upmix mono audio to stereo?

Jason Galyon wrote:
> I have a need to take an audio file of variable format and channels
and
> turn it into an AAC file with 16 bit, 44100 stereo.
> However, when I give the command line below it is producing only sound
> in the left channel. Some but not all of the input files are in fact
> mono channel. It appears that ecasound is mixing everything down
> instead of up... lowest common denominator?
> I am doing something wrong but even with googling I am not finding
what
> I need for this to work.
> Details:
> OSX 10.5
> ecasound 2.6.0
>
> command line:
> /opt/local/bin/ecasound -a:0 -f:s16_le,2,44100,interleaved
>
-i:resample,auto,playat,3.0,select,0,2.37714,/Users/jayson/testbed/timel
ines/HVARun/9cbd35cc-04e8-43a4-b719-ce35dc8ca923.wav
> -a:1 -f:s16_le,2,44100,interleaved
>
-i:resample,auto,playat,5.57714,select,0,0.901224,/Users/jayson/testbed/
timelines/HVARun/71a474b4-9de4-4e29-806c-3dc056d16fcb.wav
> -a:2 -f:s16_le,2,44100,interleaved
>
-i:resample,auto,playat,6.478364,select,0,0.973787,/Users/jayson/testbed
/timelines/HVARun/81159bc5-d6af-4b45-86a9-0d9099fd8ea9.wav
> -a:3 -f:s16_le,2,44100,interleaved
>
-i:resample,auto,playat,7.452151,select,0,1.66531,/Users/jayson/testbed/
timelines/HVARun/20471550-a453-45f9-acdf-395885954e30.wav
> -a:4 -f:s16_le,2,44100,interleaved
>
-i:resample,auto,playat,9.217461,select,0,4.13113,/Users/jayson/testbed/
timelines/HVARun/a6e6065e-49d9-45ed-9189-a3b09f3451ad.wav
> -a:5 -f:s16_le,2,44100,interleaved
>
-i:resample,auto,playat,13.448591,select,0,5.26512,/Users/jayson/testbed
/timelines/HVARun/dc8f743b-fe43-4931-a51a-caa1c5f44c34.wav
> -a:6 -f:s16_le,2,44100,interleaved
>
-i:resample,auto,playat,18.813711,select,0,3.12308,/Users/jayson/testbed
/timelines/HVARun/2cf71f75-4d64-46a1-80fd-f4657903b6a0.wav
> -a:0,1,2,3,4,5,6 -o /Users/jayson/tmp/manual.aac
>
> Output:
>
************************************************************************
********
> * ecasound v2.6.0 (C) 1997-2009 Kai Vehmanen and others
>
************************************************************************
********
> [* Session created *]
> [* Chainsetup created (cmdline) *]
> [* Connecting chainsetup *]
> (eca-chainsetup) 'nonrt' buffering mode selected.
> (eca-chainsetup) NOTE: using existing audio parameters
-f:s16_le,1,44100
> for object 'resample:playat (tried to open with -f:s16_le,2,44100).
> (eca-chainsetup) Opening input "resample:playat", mode "read". Format:
> s16_le, channels 1, srate 44100, interleaved (locked params).
> (eca-chainsetup) NOTE: using existing audio parameters
-f:s16_le,1,44100
> for object 'resample:playat (tried to open with -f:s16_le,2,44100).
> (eca-chainsetup) Opening input "resample:playat", mode "read". Format:
> s16_le, channels 1, srate 44100, interleaved (locked params).
> (eca-chainsetup) NOTE: using existing audio parameters
-f:s16_le,1,44100
> for object 'resample:playat (tried to open with -f:s16_le,2,44100).
> (eca-chainsetup) Opening input "resample:playat", mode "read". Format:
> s16_le, channels 1, srate 44100, interleaved (locked params).
> (eca-chainsetup) NOTE: using existing audio parameters
-f:s16_le,1,44100
> for object 'resample:playat (tried to open with -f:s16_le,2,44100).
> (eca-chainsetup) Opening input "resample:playat", mode "read". Format:
> s16_le, channels 1, srate 44100, interleaved (locked params).
> (eca-chainsetup) NOTE: using existing audio parameters
-f:s16_le,1,44100
> for object 'resample:playat (tried to open with -f:s16_le,2,44100).
> (eca-chainsetup) Opening input "resample:playat", mode "read". Format:
> s16_le, channels 1, srate 44100, interleaved (locked params).
> (eca-chainsetup) NOTE: using existing audio parameters
-f:s16_le,1,44100
> for object 'resample:playat (tried to open with -f:s16_le,2,44100).
> (eca-chainsetup) Opening input "resample:playat", mode "read". Format:
> s16_le, channels 1, srate 44100, interleaved (locked params).
> (eca-chainsetup) NOTE: using existing audio parameters
-f:s16_le,1,44100
> for object 'resample:playat (tried to open with -f:s16_le,2,44100).
> (eca-chainsetup) Opening input "resample:playat", mode "read". Format:
> s16_le, channels 1, srate 44100, interleaved (locked params).
> (eca-chainsetup) NOTE: using existing audio parameters
-f:s16_be,2,44100
> for object '/Users/jayson/tmp/manual.aac (tried to open with
> -f:s16_le,2,44100).
> (eca-chainsetup) Opening output "/Users/jayson/tmp/manual.aac", mode
> "write". Format: s16_be, channels 2, srate 44100, interleaved (locked
> params).
> [* Chainsetup connected *]
> (eca-control-objects) Connected chainsetup: "command-line-setup".
> [* Controller/Starting batch processing *]
> [* Engine - Driver start *]
>
> [* Engine - Processing finished *]
> [* Controller/Batch processing finished (0) *]
> (eca-control-objects) Disconnecting chainsetup: "command-line-setup".
> [* Chainsetup disconnected *]
>
> Thank you for your help.
>
>
Note that I also tried with using the -x option... no difference.
/opt/local/bin/ecasound -a:0 -x -f:s16_le,2,44100,interleaved
-i:resample,auto,playat,3.0,select,0,2.37714,/Users/jayson/testbed/timel
ines/HVARun/9cbd35cc-04e8-43a4-b719-ce35dc8ca923.wav
-a:1 -x -f:s16_le,2,44100,interleaved
-i:resample,auto,playat,5.57714,select,0,0.901224,/Users/jayson/testbed/
timelines/HVARun/71a474b4-9de4-4e29-806c-3dc056d16fcb.wav
-a:2 -x -f:s16_le,2,44100,interleaved
-i:resample,auto,playat,6.478364,select,0,0.973787,/Users/jayson/testbed
/timelines/HVARun/81159bc5-d6af-4b45-86a9-0d9099fd8ea9.wav
-a:3 -x -f:s16_le,2,44100,interleaved
-i:resample,auto,playat,7.452151,select,0,1.66531,/Users/jayson/testbed/
timelines/HVARun/20471550-a453-45f9-acdf-395885954e30.wav
-a:4 -x -f:s16_le,2,44100,interleaved
-i:resample,auto,playat,9.217461,select,0,4.13113,/Users/jayson/testbed/
timelines/HVARun/a6e6065e-49d9-45ed-9189-a3b09f3451ad.wav
-a:5 -x -f:s16_le,2,44100,interleaved
-i:resample,auto,playat,13.448591,select,0,5.26512,/Users/jayson/testbed
/timelines/HVARun/dc8f743b-fe43-4931-a51a-caa1c5f44c34.wav
-a:6 -x -f:s16_le,2,44100,interleaved
-i:resample,auto,playat,18.813711,select,0,3.12308,/Users/jayson/testbed
/timelines/HVARun/2cf71f75-4d64-46a1-80fd-f4657903b6a0.wav
-a:0,1,2,3,4,5,6 -x -f:s16_le,2,44100,interleaved -o
/Users/jayson/tmp/manual.aac

-- 
Jason Galyon
Silver Screen Tele-Reality, Inc. 
http://www.sister.tv | http://www.videocarlot.tv
Phone: 972-855-3500 |  Fax: 413-778-2146
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