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| -rw-r--r-- | .gitignore | 6 | ||||
| -rw-r--r-- | README.md | 68 |
2 files changed, 62 insertions, 12 deletions
@@ -14,6 +14,7 @@ config.guess config.log config.status config.sub +compile depcomp install-sh libtool @@ -26,3 +27,8 @@ m4/lt~obsolete.m4 missing stamp-h1 aac-enc +mot-encoder +aac-enc-dabplus +aac-enc-dabplus-zmq +dabplus-zmq +alsa-dabplus-zmq @@ -1,16 +1,20 @@ fdk-aac-dabplus =============== -A standalone library of the Fraunhofer FDK AAC code from Android. +A standalone library of the Fraunhofer FDK AAC code from Android, patched for +960-transform. Used for DAB+ broadcast encoding. -This is 960-frames version of codec. Used for DAB+ boradcast encoding. +Also includes a version with a ODR-DabMux compatible ZeroMQ output. +There is experimental support for DAB MOT Slideshow and DLS, written by +CSP http://rd.csp.it -Usage: -aac-enc-dabplus [OPTION...] +Usage: - -b, --bitrate={ 8, 16, ..., 192 } Output bitrate in kbps. Must be 8 multiple. + aac-enc-dabplus [OPTION...] + + -b, --bitrate={ 8, 16, ..., 192 } Output bitrate in kbps. Must be multiple of 8. -i, --input=FILENAME Input filename (default: stdin). -o, --output=FILENAME Output filename (default: stdout). -a, --afterburner Turn on AAC encoder quality increaser. @@ -19,27 +23,67 @@ aac-enc-dabplus [OPTION...] -r, --rate={ 32000, 48000 } Sample rate for raw input (default: 48000). +The encoder with ZeroMQ output has the same options as above, +but takes a zmq destination url as output + +See + aac-enc-dabplus-zmq -h + How to build -=============== +============= + +Requirements: +* boost-thread and boost-system +* ImageMagick magickwand (for MOT slideshow) * Download code and unpack it. -* Download and install libfec from crc.ca website: http://mmbtools.crc.ca/content/view/39/65/ (follow instructions on that website). -* do "./configure --enable-example", then "make" and "make install" -* use aac-enc-dabplus to encode live stream or file. +* Download and install libfec from https://github.com/Opendigitalradio/ka9q-fec +* do "./configure", then "make" and "make install" +* use aac-enc-dabplus or aac-enc-dabplus-zmq to encode live stream or file. +* use mot-encoder to encode images into MOT Slideshow How to use -=============== +========== + +Scenario 1 +---------- -Scenario 1 (Live Stream enconding and preparing for DAB muxer): +Live Stream encoding and preparing for DAB muxer, with ZMQ output, at 32kHz, using sox. + + ALSASRC="default" + DST="tcp://yourserver:9000" + BITRATE=64 + + sox -t alsa $ALSASRC -b 16 -t raw - rate 32k channels 2 | \ + ../fdk-aac-dabplus/aac-enc-dabplus-zmq -r 32000 \ + -i /dev/stdin -b $BITRATE -f raw -a -o $DST -p 4 + +Scenario 2 +---------- +Live Stream encoding and preparing for DAB muxer, with FIFO to odr-dabmux, 48kHz, using +arecord. arecord -t raw -f S16_LE -c 2 -r 48000 -D plughw:CARD=Loopback,DEV=0,SUBDEV=0 | \ aac-enc-dabplus -b 24 -f raw -c 2 -r 48000 -i /dev/stdin -o /dev/stdout 2>/dev/null | \ mbuffer -q -m 10k -P 100 -s 360 > station1.fifo -Scenario 2 (Wave file enconding): +Scenario 3 +---------- +Wave file encoding, for non-realtime processing aac-enc-dabplus -a -b 64 -i wave_file.wav -o station1.dabp +Usage of MOT Slideshow +====================== + +MOT Slideshow is an experimental feature. The mot-encoder reads images in the specified folder, +and generates the PAD data for the encoder. This is communicated through a unique fifo in /tmp, +therefore only one instance can run on a single machine. + +Only aac-enc-dabplus-zmq inserts the PAD data from mot-encoder into the bitstream. + +This is an ongoing development. + |