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mp4setaudioprofilelevel(3) - Linux man page
https://linux.die.net/man/3/mp4setaudioprofilelevel#:~:text=MP4SetAudioProfileLevel%20sets%20the%20minumum%20profile%2Flevel%20of%20MPEG-4%20audio,0x00%20Reserved%200x01%20Main%20Profile%20%40%20Level%201
MPEG-4 - Wikipedia
https://en.wikipedia.org/wiki/MPEG-4
What are MPEG-4 Systems 'profiles and levels'? | MPEG
https://mpeg.chiariglione.org/faq/what-are-mpeg-4-systems-profiles-and-levels
Profiles are defined in multiple dimensions. In the context of MPEG-4 Systems Scene Graph Profiles and OD Profiles are distinguished. While profiles establish a subset of MPEG-4 tools, levels put constraints on the parameters of these tools. Therefore the combination of profiles and levels help to determine the necessary processing power and memory requirements for an …
Definition of Levels for MPEG-4 Video Profiles | Inside ...
http://blog.mediacoderhq.com/definition-of-levels-for-mpeg-4-video-profiles/
Definition of Levels for MPEG-4 Video Profiles | Inside & Outside MediaCoder. Table A.1 describes the MPEG-4 Visual levels for the Version 1 and Version 2 profiles only including natural visual (or video) data, this means the so-called MPEG-4 video profiles. Note that Level 0 for the Simple profile has been defined in the 2 nd Extension to the 2 nd Edition of the …
MPEG-4, Advanced Video Coding, High Profile
https://www.loc.gov/preservation/digital/formats/fdd/fdd000215.shtml
Full name. Information technology -- Coding of audio-visual objects (formal name); MPEG-4, Advanced Video Coding (part 10), High Profile. Description. The High Profile of MPEG-4_AVC (from ITU-T H.264) supports 4:2:0 chroma at 8 bits per channel, adaptive macroblock-level switching between 8x8 and 4x4 transform block size, encoder-specified quantization scaling …
RTP Payload Format for MPEG-4 Audio/Visual Streams
https://tools.ietf.org/id/draft-ietf-payload-rfc3016bis-00.html
The audio stream SHALL be compliant with the MPEG-4 Audio Profile@Level specified by the parameters "profile-level-id" and "MPS-profile-level-id". Interoperability between a sender and a receiver may be achieved by specifying the parameters "profile-level-id" and "MPS-profile-level-id", or by arranging in the capability exchange procedure to set this parameter mutually to the …
Advanced Audio Coding (MPEG-4) - loc.gov
https://www.loc.gov/preservation/digital/formats/fdd/fdd000114.shtml
Identification and description. Full name. ISO/IEC 14496-3:2001. Information technology -- Coding of audio-visual objects -- Part 3: Audio. Formal name for the relevant part of the MPEG-4 standard; note that this part covers several types of audio coding including Advanced Audio Coding. Common name: AAC.
What are the different profiles supported by MPEG-4 Video ...
https://mpeg.chiariglione.org/faq/what-are-different-profiles-supported-mpeg-4-video
The maximum bitrate is 384 kbit in Level 1 and 2 Mbit/s Level 2. While the levels do not prescribe the visual session size, they are created with a certain session size in mind, called the ‘typical visual session size’. For Simple this was QCIF, for Core it …
RFC 6416 - RTP Payload Format for MPEG-4 Audio/Visual Streams
https://tools.ietf.org/html/rfc6416
RFC 6416 RTP Payload Format for MPEG-4 Streams October 2011 The following are some examples of the "profile-level-id" value: 1 : Main Audio Profile Level 1 9 : Speech Audio Profile Level 1 15: High Quality Audio Profile Level 2 30: Natural Audio Profile Level 1 44: High Efficiency AAC Profile Level 2 48: High Efficiency AAC v2 Profile Level 2 55: Baseline MPEG Surround …
MPEG Audio FAQ: MPEG-1 - Massachusetts Institute of Technology
https://sound.media.mit.edu/resources/mpeg4/audio/faq/mpeg1.html
It also describes the accuracy level that a decoder should meet in order to be called an MPEG audio decoder or a 'high accuracy' MPEG Audio decoder. An important part of the conformance document is a set of bitstreams and the corresponding reference decoder output, that address several functionalities of the decoder.
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