update standards

README.md

@@ -14,19 +14,29 @@ Definitions and functions shared between [gortsplib](https://github.com/bluenvir
 
 ## Standards
 
+Video codecs
+
+* ISO 14496-2, Coding of audio-visual objects, Part 2, Visual
 * [ITU-T Rec. T-871, JPEG File Interchange Format](https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-T.871-201105-I!!PDF-E&type=items)
 * [ITU-T Rec. H.264 (08/2021)](https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-H.264-202108-I!!PDF-E&type=items)
 * [ITU-T Rec. H.265 (08/2021)](https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-H.265-202108-I!!PDF-E&type=items)
-* ISO 11172-3, Coding of moving pictures and associated audio
-* ISO 13818-3, Generic Coding of Moving Pictures and Associated Audio: Audio
-* ISO 14496-3, Coding of audio-visual objects, part 3, Audio
+* [VP9 Bitstream & Decoding Process Specification v0.6](https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp9-bitstream-specification-v0.6-20160331-draft.pdf)
+* [VP9 Codec ISO Media File Format Binding](https://www.webmproject.org/vp9/mp4/)
 * [AV1 Bitstream & Decoding Process](https://aomediacodec.github.io/av1-spec/av1-spec.pdf)
 * [AV1 Codec ISO Media File Format Binding](https://aomediacodec.github.io/av1-isobmff)
-* [VP9 Bitstream & Decoding Process Specification v0.6](https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp9-bitstream-specification-v0.6-20160331-draft.pdf)
-* [VP9 Codec ISO Media FIle Format Binding](https://www.webmproject.org/vp9/mp4/)
+
+Audio audio codecs
+
+* ISO 11172-3, Coding of moving pictures and associated audio
+* ISO 13818-3, Generic Coding of Moving Pictures and Associated Audio, Audio
+* ISO 14496-3, Coding of audio-visual objects, Part 3, Audio
 * [RFC6716, Definition of the Opus Audio Codec](https://datatracker.ietf.org/doc/html/rfc6716)
 * [Opus in MP4/ISOBMFF](https://opus-codec.org/docs/opus_in_isobmff.html)
 
+Formats
+
+* ISO 14496-12, Coding of Audio-visual objects, Part 12, ISO base media file format
+
 ## Related projects
 
 * [MediaMTX](https://github.com/bluenviron/mediamtx)