So, it turns out that tcextract extracts the 5.1 channel AC3 file (when
used with -a 0). If I use -a [1/2/3/etc], I get a 0 size file.
When I use tcdecode on the AC3 file, it downmixes to two channels and
produces a stereo file. However, I can use the -s [c,f,r] to weight
mixing of the centre, front and rear to extract 3 different stereo
files....(running tcdecode 3 different times with 3 different weights of
[1,0,0], [0,1,0] and [0,0,1].
Its something I can use for now.
It would be nice to be able to extract the DTS channels - tcdecode does
not decode DTS.
Thanks for your help,
D
Robin Gareus wrote:
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D. Sen wrote:
The problem with all of these applications is that they downmix the
audio down to stereo when storing to a wav file.
are you sure about that? - `man tcdecode` says in line 48:
- -A flag
audio flag for AC3/A52 decoder [none]. This flag determines the
down-mixing configuration. Valid choices for flag are determined by the
following bits set:
drc off 1
demux 2
dolby off 4
Add those numbers to turn multiple options on.
maybe you want tcextract (not decode the audio) ?
from `man tcextract`:
The command tcextract -i foo.avi -x mp3 -a 3 extracts MPEG audio track 3
from the AVI-file foo.avi and prints the bitstream to stdout.
Do you know if the tccat/tcdecode/tcextract command will save the
individual tracks (interleaved or otherwise)?
interleaved, but it depends on the codec or how many audio tracks you
select..
cheers,
robin
PS. please don't top-post!
Thanks,
Robin Gareus wrote:
D. Sen wrote:
Robin Gareus wrote:
D. Sen wrote:
Anyone know of a way to extract the multichannel audio from a
DVD-Audio
disc? Xine plays the multichannel files - so I assume there has to
be a
way to extract them...
there's `tcdemux` and `tcdecode` from the transcode package
- dvdrip provides is a GUI.
(you can copy/paste dvdrip's LOG window for the commands it uses to do
the job. You only want the first part of the pipe: tcdemux |
tcdecode..)
dvdrip refuses to work on my distribution.
mmh then there's the chance that tcdemux & tcdecode won't work either. -
usually you get those as dependency to dvd::rip. - see.
http://www.theorie.physik.uni-goettingen.de/~ostreich/transcode
I'm sure that you can also use mplayer/mencoder or some ffmpeg command
line to do the same job.. gstreamer too..
Is there a chance you could
tell me what the tcdemux | tcdecode scripts would be to extract the
audio?
sorry, I did not have my dvd drive with me.. now I do.
how are your command line skills? dvd::rip does a lot of fancy piping (
`man tee` -> man dvdrip-multitee ? :) ) - the command that does ripping
& demux is several pages long (includes 100 subtitle commands)...
It boils down to sth like this:
tccat -t dvd -T 1,-1,1 -i \/dev\/scsi\/host8\/bus0\/target0\/lun0\/cd |
tcextract -a 0 -x ac3 -t vob | tcdecode -x ac3 | tcscan -x pcm
adjust the device to match your DVD-ROM. and replace the last step " |
tcscan -x pcm" with " > ripped-audio.pcm" to write the audio into a
file; or use " | tee ripped-audio.pcm | tcscan -x pcm" to write to a
file and scan for peak values..
use sox or rezound or ... to convert the pcm into your favorite format!
good luck,
robin
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