Re: [Cellar] Update specification language: CodecPrivate element MUST be set for H264 in Matroska
Jerome Martinez <jerome@mediaarea.net> Sun, 27 December 2020 16:15 UTC
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From: Jerome Martinez <jerome@mediaarea.net>
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Date: Sun, 27 Dec 2020 17:15:44 +0100
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Subject: Re: [Cellar] Update specification language: CodecPrivate element MUST be set for H264 in Matroska
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On 27/12/2020 16:33, guest271314 wrote: > Cure that by conspicuously and unambiguously including wording in the > standard/specification that " CodecPrivate element MUST be set for > H264 in Matroska". CodecPrivate in Matroska general specification is not mandatory, as this status depends on the coding format (mandatory for H.264, not mandatory for MPEG-2 etc). >From https://github.com/ietf-wg-cellar/matroska-specification/blob/master/codec_specs.md#v_mpeg4isoavc "The Private Data contains a AVCDecoderConfigurationRecord structure, [...]" This is not the IETF "MUST" but seems clear (affirmative sentence) that CodecPrivate is mandatory in the case of the H.264 mapping. Do you mean that we should be even more clear in 2 places? - in CodecPrivate definition, something like CodecPrivate is mandatory if specified as such ("MUST") in the corresponding codec mapping specification. - in H.264 codec mapping definition, something like The CodecPrivate block MUST contain a AVCDecoderConfigurationRecord structure [...] Jérôme
- [Cellar] Update specification language: CodecPriv… guest271314
- Re: [Cellar] Update specification language: Codec… Jerome Martinez
- Re: [Cellar] Update specification language: Codec… Moritz Bunkus
- [Cellar] Fwd: Update specification language: Code… guest271314
- [Cellar] Fwd: Update specification language: Code… guest271314
- Re: [Cellar] Fwd: Update specification language: … Jerome Martinez
- Re: [Cellar] Update specification language: Codec… Jerome Martinez