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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

---------

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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packages/server/src/audio-encoder.ts
+4 -2
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@@ -11,7 +11,7 @@ import {
AudioSample,
CustomAudioEncoder,
type MaybePromise,
QUALITY_MEDIUM,
Quality,
EncodedPacket,
} from 'mediabunny';
import * as NodeAv from 'node-av';
@@ -112,7 +112,9 @@ export class NodeAvAudioEncoder extends CustomAudioEncoder {
codecContext.codecId = CODEC_TO_CODEC_ID[this.codec]!;
codecContext.sampleFormat = sampleFormat;
codecContext.timeBase = new NodeAv.Rational(1, this.config.sampleRate);
codecContext.bitRate = BigInt(this.config.bitrate ?? QUALITY_MEDIUM._toAudioBitrate(this.codec) ?? 0);
codecContext.bitRate = BigInt(
this.config.bitrate ?? new Quality('medium')._toAudioBitrate(this.codec) ?? 0,
);
if (this.config.bitrateMode === 'constant') {
codecContext.rcMinRate = codecContext.bitRate;