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Diffstat (limited to 'audio/jack_capture/README')
| -rw-r--r-- | audio/jack_capture/README | 59 |
1 files changed, 54 insertions, 5 deletions
diff --git a/audio/jack_capture/README b/audio/jack_capture/README index c29ad28b0c..3ae29ea35c 100644 --- a/audio/jack_capture/README +++ b/audio/jack_capture/README @@ -1,8 +1,57 @@ -A handy audio recorder based on jack. Command line or GUI. Very low on -resources. Able to write 256 channels to local hard drive (tested on -iCore 7). +jack_capture is a program for recording sound files with JACK. -Meterbridge is a nice companion program (VU meters) unless you start -the program from console. +* Autogenerated filenames are unique and humanly readable. + +* The 4GB size barrier for wav files is handled by continuing + writing to new files when reaching 4GB. + +* Supports all soundfile formats supported by sndfile. + (wav, aiff, ogg, flac, wavex, au, etc.) (option: -f <format>) + +* Supports mp3 by using liblame. (option: -mp3) + +* Option for writing raw 16 bit data to stdout. (option: -ws) + +* Built-in console meter, plus option for automatically starting and stopping + the Meterbridge jack meter program. Port connections to Meterbridge + are done automatically, and on the fly, by jack_capture. + +* jack_capture can connect to any input or output jack port. + + When "connecting" to a jack input port (i.e. a writable port), jack_capture + constantly monitors which jack ports which are connected + to that input port, and makes sure jack_capture is always + connected to the same ports. + + In other words, jack_capture will reconnect its ports automatically during + recording to match the connections of the ports. + This is for instance convenient when recording the playback ports since + jack_capture can be started first, and then other programs can start + and stop at any moment while all sound still should be recorded. + +* No limit on the number of jack ports jack_capture can connect to. + (I.e. the --port argument can be specified more than once, plus that + it accepts wildcard arguments. For instance, jack_capture --port "*" will + connect to all current jack ports, both input and output ports, except + jack_capture's own ports.) + +* Buffers are automatically increased during runtime to prevent + underruns and to avoid wasting memory by preallocating too much. + +* The disk thread is automatically reniced to a higher priority when + using more than half of the buffer. + +* Significantly better recording performance than Ardour. (probably because + jack_capture writes all channels into only one file and that it is + not creating peak files). (tested on athlonXP) + +* No problem writing at least 256 channels of 32 bit wav at once to a + local hard drive. (tested on icore7) Optional runtime dependencies are meterbridge and lame. + +This package uses POSIX filesystem capabilities to execute with +elevated privileges (required for realtime audio processing). This +may be considered a security/stability risk. Please read +http://www.slackbuilds.org/caps/ for more information. To disable +capabilities, pass SETCAP=no to the script. |