Toolame is an open source implementation of MPEG-1/2 Layer II audio coding. Toolame-dab is a modified version that supports the MPEG ZMQ output to ODR-DabMux, improved PAD insertion compatible with mot-encoder and JACK input.
It also supports the necessary options to add a DAB PAD field on every frame, and work is ongoing to make it compatible with mot-encoder from fdk-aac-dabplus for MOT Slideshow and DLS support. The toolame-dab always uses DAB framing.
Its development is done on github: https://github.com/Opendigitalradio/toolame-dab
-s <kHz>: sampling rate in kHz -p <bytes>: add x PAD bytes to every MPEG frame -P <padfifo>: take PAD data from the specified FIFO -b <bitrate>: output bitrate in kbit/s -j : enable JACK input
for detailed information
Example with alsa input using sox:
sox -t alsa $ALSASRC -b 16 -t raw - rate 48k channels 2 | \ ../toolame/toolame \ -s 48 -b $BITRATE /dev/stdin $DST
where $DST is of the form
tcp://<some host running odr-dabmux>:<port>
Taken from this script
Example with stdout as output:
toolame -s 48 -b 128 /dev/stdin /dev/stdout
Reads linear stream from standard input, encode it at 128kbit/s, add 4bytes for DAB PAD and output stream to standard output (this command was typically used, "piped" with other commands for live encoding in a DAB transmission. Now it's better to use the newer ZMQ.)
Example with JACK input and output to ODR-DabMux ZMQ running on localhost
toolame -s 48 -b 128 -j dabenc tcp://localhost:9002
The encoder will create two JACK ports: dabenc:input0 and dabenc:input1
Get toolame-dab from https://github.com/Opendigitalradio/toolame-dab
git clone https://github.com/Opendigitalradio/toolame-dab.git cd toolame-dab make sudo cp toolame /usr/local/bin
The installed executable is called toolame
The original source for toolame-02l is http://sourceforge.net/projects/toolame/files/
A fork of toolame called twolame exists. Despite the fact that the code has been cleaned, twolame has lost DAB support that was present in toolame. So be careful to install toolame-dab and not twolame for DAB tests.