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c3df2a24e5
* Add custom quality factors and quantizer bitrate mode (closes #327) * Fix quantizer mode fallback and per-frame quantizer edge cases * Clean up quantizer mode tests * Quantizer implementation * Add quality tests * Improve conversion codec error message, make test more lenient * Add quantizer support blog post --------- Co-authored-by: Vanilagy <[email protected]>
41 lines
1.5 KiB
Markdown
41 lines
1.5 KiB
Markdown
---
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description: VP9 video codec definition, defining legal codec strings, decoder configs, and packet data formats.
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---
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<script setup>
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import { VPBadge } from 'vitepress/theme'
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</script>
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<VPBadge type="info" text="Video codec" />
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# VP9 codec registration
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## Description
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The VP9 video codec, specified in the [VP9 Bitstream & Decoding Process Specification](https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp9-bitstream-specification-v0.6-20160331-draft.pdf).
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## Codec ID
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```ts
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'vp9'
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```
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## `EncodedPacket` data
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The packet's data must be a frame as described in Section 6 of the [VP9 Bitstream & Decoding Process Specification](https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp9-bitstream-specification-v0.6-20160331-draft.pdf).
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## `EncodedPacket` type
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If the packet's type is `'key'`, then the packet is expected to contain a frame with `frame_type` of `KEY_FRAME`, as defined in Section 7.2 of the [VP9 Bitstream & Decoding Process Specification](https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp9-bitstream-specification-v0.6-20160331-draft.pdf).
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## `VideoDecoderConfig` codec string
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The full codec string begins with the prefix `'vp09.'`, with a variable-length suffix as specified in the [VP Codec ISO Media File Format Binding](https://www.webmproject.org/vp9/mp4/).
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## `VideoDecoderConfig` description
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`description` is not used for this codec.
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## Quantizer range
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VP9 has quantizer support and supports quantizer values in the range [0, 63]. |