mirror of
https://github.com/blakeblackshear/frigate.git
synced 2026-10-03 05:16:50 +03:00
Josh HawkinsandGitHub
836b0bbb9f
* add sub stream recording with adaptive quality playback Optionally record a second, lower bitrate stream alongside the main recording stream via a `record_sub` input role and `record.sub` config block, with its own retention windows. Recordings rows now carry the stream type plus the media details needed to serve both streams from one manifest: video codec, audio presence, audio codec and rate, and a record-time keyframe index. Playback resolves coverage across both streams and merges them into a single VOD sequence, falling back to a discontinuity manifest with per-clip init segments when the media signatures differ. The player exposes a quality selector, and an auto governor picks the stream from stall time, bandwidth, codec support, and the save-data hint. * fix tests and i18n
74 lines
2.0 KiB
TypeScript
74 lines
2.0 KiB
TypeScript
/**
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* Best-effort probe for whether this browser can decode a video codec
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* family.
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*
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* Frigate only stores the codec family from ffprobe (no profile or
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* level), so the probe tests representative MIME samples per family.
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* The result is a hint, not proof: a 10-bit stream can fail on a
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* browser that passes the Main-profile sample, so callers must keep a
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* reactive fallback for fatal codec errors. Unknown or NULL codecs
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* (legacy rows) always report supported - a wrong "unsupported" answer
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* silently degrades quality, which is worse than a failed attempt the
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* reactive path recovers from.
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*/
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declare global {
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interface Window {
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ManagedMediaSource?: typeof MediaSource;
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}
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}
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// any one supported sample marks the family playable
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const CODEC_MIME_SAMPLES: Record<string, string[]> = {
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h264: ['video/mp4; codecs="avc1.42E01E"', 'video/mp4; codecs="avc1.64001F"'],
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hevc: [
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'video/mp4; codecs="hvc1.1.6.L120.90"',
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'video/mp4; codecs="hev1.1.6.L120.90"',
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],
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av1: ['video/mp4; codecs="av01.0.05M.08"'],
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};
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const FAMILY_ALIASES: Record<string, string> = {
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avc: "h264",
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avc1: "h264",
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h265: "hevc",
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hev1: "hevc",
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hvc1: "hevc",
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av01: "av1",
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};
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function canPlayMimeType(mimeType: string): boolean {
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if (window.ManagedMediaSource?.isTypeSupported(mimeType)) {
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return true;
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}
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if (window.MediaSource?.isTypeSupported(mimeType)) {
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return true;
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}
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// native playback fallback for browsers without MSE
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return document.createElement("video").canPlayType(mimeType) !== "";
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}
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/**
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* Fails open: unknown codecs and NULL (legacy) codecs report supported,
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* since wrongly downgrading quality is worse than a recoverable failure.
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*/
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export function isCodecFamilySupported(
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codecName: string | null | undefined,
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): boolean {
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if (!codecName) {
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return true;
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}
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const normalized = codecName.toLowerCase().trim();
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const family = FAMILY_ALIASES[normalized] ?? normalized;
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const samples = CODEC_MIME_SAMPLES[family];
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if (!samples) {
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return true;
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}
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return samples.some(canPlayMimeType);
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}
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