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Add custom quality factors and quantizer bitrate mode (#448)

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* 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

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Co-authored-by: Vanilagy <[email protected]>
This commit is contained in:
Don Carignan
2026-07-30 17:24:59 +02:00
committed by GitHub
co-authored by Vanilagy
parent 1a99b0371d
commit c3df2a24e5
48 changed files with 1372 additions and 371 deletions
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docs/codec-registry/av1.md
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@@ -35,3 +35,7 @@ The full codec string begins with the prefix `'av01.'`, with a variable-length s
## `VideoDecoderConfig` description
`description` is not used for this codec.
## Quantizer range
AV1 has quantizer support and supports quantizer values in the range [0, 255].
docs/codec-registry/avc.md
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@@ -42,4 +42,8 @@ The full codec string begins with the prefix `'avc1.'` or `'avc3.'`, with a suff
If the bitstream is in the _canonical_ (length-prefixed) format, `description` must be an `AVCDecoderConfigurationRecord` as defined in [ISO/IEC 14496-15](https://www.iso.org/standard/89118.html) Section 5.3.3.1.
If the bitstream is in the _Annex B_ format, `description` must be undefined.
If the bitstream is in the _Annex B_ format, `description` must be undefined.
## Quantizer range
AVC has quantizer support and supports quantizer values in the range [0, 51].
docs/codec-registry/hevc.md
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@@ -43,3 +43,7 @@ The full codec string begins with the prefix `'hev1.'` or `'hvc1.'`, with a vari
If the bitstream is in the _canonical_ (length-prefixed) format, `description` must be an `HEVCDecoderConfigurationRecord` as defined in [ISO/IEC 14496-15](https://www.iso.org/standard/89118.html) Section 8.3.3.1.
If the bitstream is in the _Annex B_ format, `description` must be undefined.
## Quantizer range
HEVC has quantizer support and supports quantizer values in the range [0, 51].
docs/codec-registry/vp8.md
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@@ -37,3 +37,7 @@ If the packet's type is `'key'`, then the packet is expected to contain a frame
## `VideoDecoderConfig` description
`description` is not used for this codec.
## Quantizer range
VP8 has no quantizer support.
docs/codec-registry/vp9.md
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@@ -35,3 +35,7 @@ The full codec string begins with the prefix `'vp09.'`, with a variable-length s
## `VideoDecoderConfig` description
`description` is not used for this codec.
## Quantizer range
VP9 has quantizer support and supports quantizer values in the range [0, 63].