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MPEG-4 - Wikipedia
https://en.wikipedia.org/wiki/MPEG-4
MPEG-4 is a method of defining compression of audio and visual digital data. It was introduced in late 1998 and designated a standard for a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group under the formal standard ISO/IEC 14496 – Coding of audio-visual objects. Uses of MPEG-4 include compression of AV …
MPEG-4 General Audio Coding
https://sound.media.mit.edu/resources/mpeg4/audio/general/aes106_1-GeneralAudio.pdf
• MPEG-4 General Audio Coding: The “all-round” coding system among the MPEG-4 audio schemes, providing a set powerful tools • Based on MPEG-2 Advanced Audio Coding kernel • Several enhancements for improved coding efficiency • Perceptual Noise Substitution (PNS): Exploiting noise-like components in the signal • Long Term Prediction (LTP):
Missing element: MPEG4-GENERIC audio RTP …
https://stackoverflow.com/questions/59854620/missing-element-mpeg4-generic-audio-rtp-depayloader-gstreamer
There are two different MPEG4 audio RTP formats in the wild. MP4A-LATMand MPEG4-GENERIC. See RFC 3016and RFC 3640respectively. Looks like GStreamer only supports MP4A-LATM. So basically, yes, the format you are trying to receive is not supported. Share.
Audio | MPEG
https://mpeg.chiariglione.org/standards/mpeg-4/audio
A toolset for structured general representations of sound is defined by MPEG-4, namely MPEG-4 Structured Audio. What it is for Among the numerous applications of structured sound, a very important one is ultra low-bitrate transmission of audio content and related processing algorithms, exploiting formerly unexplored forms of redundancy in signals.
AAC packaging for "mpeg4-generic" stream?
https://live-devel.live.narkive.com/sZoSpv5f/aac-packaging-for-mpeg4-generic-stream
a=control: rtsp://192.168.0.153/input_1/audio a=rtpmap: 97 mpeg4-generic/16000/1 a=fmtp: 97 streamtype=5;profile-level-id=16;mode=AAC-hbr;config=1408;sizeLength=13;indexLength=3;indexDeltaLength=3;constantDuration=1024
RFC 3640 - RTP Payload Format for Transport of MPEG-4 ...
https://tools.ietf.org/html/rfc3640
This specification defines a generic mode that can be used for any MPEG-4 stream, as well as specific modes for the transportation of MPEG-4 CELP and MPEG-4 AAC streams, defined in ISO/IEC 14496-3 . When use of this payload format is signaled using SDP [ 5 ], an "rtpmap" attribute is part of that signaling.
MIME Media Type Sub-Parameter Registries
https://www.iana.org/assignments/media-type-sub-parameters/media-type-sub-parameters.xhtml
Sub-Parameter Registry for mode=rtp-midi of audio/mpeg4-generic Registration Procedure(s) See sub-registries below Reference . j_sec Values Registration Procedure(s) Standards Action Reference Available Formats CSV. j_sec Value Reference; j_sec=none : j_sec=recj : j_update Values Registration Procedure(s) ...
MPEG Audio FAQ: MPEG-1
https://sound.media.mit.edu/resources/mpeg4/audio/faq/mpeg1.html
MPEG-1 audio aims for generic sound waves, i.e. it is not restricted to e.g. speech signals, but codes all types of sound signals. It performs perceptual audio coding rather than lossless coding. In lossless coding, redundancy in the waveform is reduced to compress the sound signal, and the decoded sound wave does not differ from the original ...
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