ROC-SEND(1) Roc Toolkit ROC-SEND(1) NAME roc-send - send real-time audio SYNOPSIS roc-send OPTIONS DESCRIPTION Read audio stream from an audio device or file and send it to remote receiver. Options -h, --help Print help and exit -V, --version Print version and exit -v, --verbose Increase verbosity level (may be used multiple times) -L, --list-supported list supported schemes and formats -i,--input=IO_URI Input file or device URI --input-format=FILE_FORMAT Force input file format -s,--source=ENDPOINT_URI Remote source endpoint -r,--repair=ENDPOINT_URI Remote repair endpoint -c,--control=ENDPOINT_URI Remote control endpoint --reuseaddr enable SO_REUSEADDR when binding sockets --io-latency=STRING Recording target latency, TIME units --nbsrc=INT Number of source packets in FEC block --nbrpr=INT Number of repair packets in FEC block --packet-length=STRING Outgoing packet length, TIME units --packet-limit=INT Maximum packet size, in bytes --frame-limit=INT Maximum internal frame size, in bytes --frame-length=TIME Duration of the internal frames, TIME units --rate=INT Override input sample rate, Hz --resampler-backend=ENUM Resampler backend (possible values="default", "builtin", "speex", "speexdec" default=`default') --resampler-profile=ENUM Resampler profile (possible values="low", "medium", "high" default=`medium') --interleaving Enable packet interleaving (default=off) --profiling Enable self profiling (default=off) --color=ENUM Set colored logging mode for stderr output (possible values="auto", "always", "never" default=`auto') Endpoint URI --source, --repair, and --control options define network endpoints to which to send the traffic. ENDPOINT_URI should have the following form: protocol://host[:port][/path][?query] Examples: o rtsp://localhost:123/path?query o rtp+rs8m://localhost:123 o rtp://127.0.0.1:123 o rtp://[::1]:123 o rtcp://10.9.8.3:123 The list of supported protocols can be retrieved using --list-supported option. The host field should be either FQDN (domain name), or IPv4 address, or IPv6 address in square brackets. The port field can be omitted if the protocol defines standard port. Otherwise, it is mandatory. The path and query fields are allowed only for protocols that support them, e.g. for RTSP. If FEC is enabled, a pair of a source and repair endpoints should be provided. The two endpoints should use compatible protocols, e.g. rtp+rs8m:// for source endpoint, and rs8m:// for repair endpoint. If FEC is disabled, a single source endpoint should be provided. Supported source and repair protocols: o source rtp://, repair none (bare RTP without FEC) o source rtp+rs8m://, repair rs8m:// (RTP with Reed-Solomon FEC) o source rtp+ldpc://, repair ldpc:// (RTP with LDPC-Staircase FEC) In addition, it is recommended to provide control endpoint. It is used to exchange non-media information used to identify session, carry feedback, etc. If no control endpoint is provided, session operates in reduced fallback mode, which may be less robust and may not support all features. Supported control protocols: o rtcp:// IO URI --input option requires a device or file URI in one of the following forms: o DEVICE_TYPE://DEVICE_NAME -- audio device o DEVICE_TYPE://default -- default audio device for given device type o file:///ABS/PATH -- absolute file path o file://localhost/ABS/PATH -- absolute file path (alternative form; only "localhost" host is supported) o file:/ABS/PATH -- absolute file path (alternative form) o file:REL/PATH -- relative file path o file://- -- stdin o file:- -- stdin (alternative form) Examples: o pulse://default o pulse://alsa_input.pci-0000_00_1f.3.analog-stereo o alsa://hw:1,0 o file:///home/user/test.wav o file://localhost/home/user/test.wav o file:/home/user/test.wav o file:./test.wav o file:- The list of supported schemes and file formats can be retrieved using --list-supported option. If the --input is omitted, the default driver and device are selected. The --input-format option can be used to force the input file format. If it is omitted, the file format is auto-detected. This option is always required when the input is stdin. The path component of the provided URI is percent-decoded. For convenience, unencoded characters are allowed as well, except that % should be always encoded as %25. For example, the file named /foo/bar%/[baz] may be specified using either of the following URIs: file:///foo%2Fbar%25%2F%5Bbaz%5D and file:///foo/bar%25/[baz]. Multiple slots Multiple sets of endpoints can be specified to send media to multiple addresses. Such endpoint sets are called slots. All slots should have the same set of endpoint types (source, repair, etc) and should use the same protocols for them. SO_REUSEADDR If --reuseaddr option is provided, SO_REUSEADDR socket option will be enabled for all sockets. For TCP, it allows immediately reusing recently closed socket in TIME_WAIT state, which may be useful you want to be able to restart server quickly. For UDP, it allows multiple processes to bind to the same address, which may be useful if you're using systemd socket activation. Regardless of the option, SO_REUSEADDR is always disabled when binding to ephemeral port. Time units TIME should have one of the following forms: 123ns, 123us, 123ms, 123s, 123m, 123h EXAMPLES Endpoint examples Send file to receiver with one bare RTP endpoint: $ roc-send -vv -i file:./input.wav -s rtp://192.168.0.3:10001 Send file to receiver with IPv4 source, repair, and control endpoints: $ roc-send -vv -i file:./input.wav -s rtp+rs8m://192.168.0.3:10001 \ -r rs8m://192.168.0.3:10002 -c rtcp://192.168.0.3:10003 Send file to receiver with IPv6 source, repair, and control endpoints: $ roc-send -vv -i file:./input.wav -s rtp+rs8m://[2001:db8::]:10001 \ -r rs8m://[2001:db8::]:10002 -r rtcp://[2001:db8::]:10003 Send file to two receivers, each with three endpoints: $ roc-send -vv \ -i file:./input.wav \ -s rtp+rs8m://192.168.0.3:10001 -r rs8m://192.168.0.3:10002 \ -c rtcp://192.168.0.3:10003 \ -s rtp+rs8m://198.214.0.7:10001 -r rs8m://198.214.0.7:10002 \ -c rtcp://198.214.0.7:10003 I/O examples Capture sound from the default device (omit -i): $ roc-send -vv -s rtp://192.168.0.3:10001 Capture sound from the default ALSA device: $ roc-send -vv -s rtp://192.168.0.3:10001 -i alsa://default Capture sound from a specific PulseAudio device: $ roc-send -vv -s rtp://192.168.0.3:10001 -i pulse://alsa_input.pci-0000_00_1f.3.analog-stereo Send WAV file (guess format by extension): $ roc-send -vv -s rtp://192.168.0.3:10001 -i file:./input.wav Send WAV file (specify format manually): $ roc-send -vv -s rtp://192.168.0.3:10001 -i file:./input.file --input-format wav Send WAV from stdin: $ roc-send -vv -s rtp://192.168.0.3:10001 -i file:- --input-format wav <./input.wav Send WAV file (specify absolute path): $ roc-send -vv -s rtp://192.168.0.3:10001 -i file:///home/user/input.wav Tuning examples Force a specific rate on the input device: $ roc-send -vv -s rtp://192.168.0.3:10001 --rate=44100 Select the LDPC-Staircase FEC scheme and a larger block size: $ roc-send -vv -i file:./input.wav -s rtp+ldpc://192.168.0.3:10001 \ -r ldpc://192.168.0.3:10002 -c ldpc://192.168.0.3:10003 \ --nbsrc=1000 --nbrpr=500 Select lower packet length: $ roc-send -vv -i file:./input.wav -s rtp+ldpc://192.168.0.3:10001 \ --packet-length 2500us Select lower I/O latency and frame length: $ roc-send -vv -s rtp://192.168.0.3:10001 \ --io-latency=20ms --frame-length 4ms Manually specify resampling parameters: $ roc-send -vv -s rtp://192.168.0.3:10001 \ --resampler-backend=speex --resampler-profile=high SEE ALSO roc-recv(1), and the Roc web site at https://roc-streaming.org/ BUGS Please report any bugs found via GitHub (https://github.com/roc-streaming/roc-toolkit/). AUTHORS See authors page on the website for a list of maintainers and contributors. COPYRIGHT 2023, Roc Streaming authors Roc Toolkit 0.3 2023 ROC-SEND(1)