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GStreamer: open source multimedia framework
https://gstreamer.freedesktop.org/
What is GStreamer? GStreamer is a library for constructing graphs of media-handling components. The applications it supports range from simple Ogg/Vorbis playback, audio/video streaming to complex audio (mixing) and video (non-linear editing) processing. Applications can take advantage of advances in codec and filter technology transparently.
Audio Library - GStreamer
https://gstreamer.freedesktop.org/documentation/audio/index.html
Audio Library. This library should be linked to by getting cflags and libs from gstreamer-plugins-base-1.0.pc and adding -lgstaudio-1.0 to the library flags. Subpages: audio buffer. audio channel mixer. audio format. audio info. audio quantize. Audio-channels – Support library for audio channel handling
raspberry pi - GStreamer audio how-to? - Stack Overflow
https://stackoverflow.com/questions/37691849/gstreamer-audio-how-to
Apparently I can specify alternate audio sources with an rtsp or other streaming source. The cameras are working great, so gstreamer will just be my audio source. So my progress so far: I have figured out how to play audio from the USB microphone to the speakers using: gst-launch-1.0 alsasrc device=hw:1 ! audioconvert ! autoaudiosink
audiofx - GStreamer
https://gstreamer.freedesktop.org/documentation/audiofx/index.html
GStreamer Plugins Application manual Tutorials audiofx (from GStreamer Good Plug-ins) Subpages: audioamplify– Amplifies an audio stream by a given factor audiochebband– Chebyshev band pass and band reject filter audiocheblimit– Chebyshev low pass and high pass filter audiodynamic– Compressor and Expander
audiorate - GStreamer
https://gstreamer.freedesktop.org/documentation/audiorate/index.html
GStreamer Plugins Application manual Tutorials audiorate This element takes an incoming stream of timestamped raw audio frames and produces a perfect stream by inserting or dropping samples as needed. This operation may be of use to link to elements that require or otherwise implicitly assume a perfect stream as they do not store timestamps,
Audio-channels - GStreamer
https://gstreamer.freedesktop.org/documentation/audio/gstaudiochannels.html
def GstAudio.audio_get_channel_reorder_map (channels, from, to, reorder_map): #python wrapper for 'gst_audio_get_channel_reorder_map' Returns a reorder map for from to to that can be used in custom channel reordering code, e.g. to convert from or to the GStreamer channel order.
audioconvert - GStreamer
https://gstreamer.freedesktop.org/documentation/audioconvert/index.html
GStreamer Plugins Application manual Tutorials audioconvert Audioconvert converts raw audio buffers between various possible formats. signedness and endianness conversion and channel transformations (ie. upmixing and downmixing), as well as …
audiomixer - GStreamer
https://gstreamer.freedesktop.org/documentation/audiomixer/audiomixer.html
GStreamer Plugins Application manual Tutorials audiomixer The audiomixer allows to mix several streams into one by adding the data. Mixed data is clamped to the min/max values of the data format. Unlike the adder element audiomixer properly synchronises all input streams and also handles live inputs such as capture sources or RTP properly.
Gstreamer audiomixer implementation for audio conference ...
https://stackoverflow.com/questions/16382254/gstreamer-audiomixer-implementation-for-audio-conference-cancel-user1-contri
Gstreamer audiomixer implementation for audio conference , cancel user[1] contribution when streaming to user[1] - Stack Overflow Below is the 'theoretical' pipeline that would cancel of particular user's audio contribution in an audio conference mixer. Theory goes like, we invert the user's audio samples from the original an... Stack Overflow
Audio/Video over RTP With GStreamer (Linux) - Toradex
https://developer.toradex.com/knowledge-base/audio-video-over-rtp-linux
GStreamer provides an h.264 encoding element by software named x264enc. Use this plugin if your SoM does not support H.264 encoding by hardware or if you want to use the same pipeline on different modules. Note that the video performance will be lower compared with the plugins with encoding accelerated by hardware.
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