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audioconvert - GStreamer
https://gstreamer.freedesktop.org/documentation/audioconvert/index.html
audioconvert. Audioconvert converts raw audio buffers between various possible formats. It supports integer to float conversion, width/depth conversion, signedness and endianness conversion and channel transformations (ie. upmixing …
gst-plugins-base/gstaudioconvert.c at master · …
https://github.com/GStreamer/gst-plugins-base/blob/master/gst/audioconvert/gstaudioconvert.c
* - audioconvert converts buffers in a set of supported caps. If it supports * a caps, it supports conversion from these caps to any other caps it * supports. (example: if it does A=>B and A=>C, it also does B=>C) * - audioconvert does not save state between buffers. Every incoming buffer is * converted and the converted buffer is pushed out.
Pads and capabilities - GStreamer
https://gstreamer.freedesktop.org/documentation/application-development/basics/pads.html
Caps filters are often placed after converter elements like audioconvert, audioresample, videoconvert or videoscale to force those converters to convert data to a specific output format at a certain point in a stream. Using capabilities for metadata A pad can have a set (i.e. one or more) of capabilities attached to it.
gstreamer convert audio/mpeg to audio/x-raw - Stack …
https://stackoverflow.com/questions/49657432/gstreamer-convert-audio-mpeg-to-audio-x-raw
gst-launch-1.0 filesrc location=audio.mp2 ! audio/mpeg ! audioconvert ! wavenc ! filesink location=audio.wav But audioconvert expects audio/x-raw so this fails with: WARNING: erroneous pipeline: could not link filesrc0 to audioconvert0, audioconvert0 can't handle caps audio/mpeg
audio format - GStreamer
https://gstreamer.freedesktop.org/documentation/audio/audio-format.html
AudioFormatUnpack ( info, flags, dest, data, length): #python wrapper for 'GstAudioFormatUnpack'. Unpacks length samples from the given data of format info . The samples will be unpacked into dest which each channel interleaved. dest should at least be big enough to hold length * channels * size (unpack_format) bytes.
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