mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-11-15 13:58:20 +00:00
Miguel Ángel
ada9932d4e
* fix(cli): a long video copy reports progress, resumes in 15 s pieces and stops only when stalled * perf(core): a video copy's size box follows the stage within a fifth, not a half * docs(cli): shorten two comments to the line limit * fix(cli): the copy heartbeat drops a finished copy; size budgets follow the stall and progress code * chore: size budgets rise by this change's measured bytes
44 lines
1.8 KiB
TypeScript
44 lines
1.8 KiB
TypeScript
export interface ToneMapSourceColour {
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colorSpace?: string;
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colorPrimaries?: string;
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colorTransfer?: string;
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}
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function known(value: string | undefined): string | undefined {
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return value && value !== "unknown" && value !== "reserved" ? value : undefined;
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}
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/**
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* HDR to SDR BT.709 with zscale and hable. zscale reads each frame's own tags, so only those the
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* first frame lacks are set: from ffprobe, which may see the container's, else BT.2020.
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*/
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export function hdrToSdrToneMapFilter(
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probed: ToneMapSourceColour,
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firstFrame: ToneMapSourceColour,
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size?: { width: string; height: string },
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): string {
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const fill = (key: keyof ToneMapSourceColour, fallback?: string) =>
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known(firstFrame[key]) ? undefined : (known(probed[key]) ?? fallback);
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const tags = [
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["colorspace", fill("colorSpace", "bt2020nc")],
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["color_primaries", fill("colorPrimaries", "bt2020")],
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["color_trc", fill("colorTransfer")],
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].filter(([, value]) => value);
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const setTags = tags.length ? `setparams=${tags.map((tag) => tag.join("=")).join(":")},` : "";
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const resizeBeforeToneMap = size ? `w=${size.width}:h=${size.height}:` : "";
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return `${setTags}zscale=${resizeBeforeToneMap}t=linear:npl=100,tonemap=hable:desat=0,zscale=p=bt709:t=bt709:m=bt709:r=tv`;
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}
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/** ffmpeg args printing the first shown frame's tags; ffprobe's packet-bounded reads miss edit-list pre-roll. */
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export function firstFrameColourArgs(videoPath: string): string[] {
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return [
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...["-hide_banner", "-nostats", "-i", videoPath, "-map", "0:v:0", "-frames:v", "1"],
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...["-vf", "showinfo", "-f", "null", "-"],
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];
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}
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export function parseFirstFrameColour(stderr: string): ToneMapSourceColour {
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const tags = / color_space:(\S+) color_primaries:(\S+) color_trc:(\S+)/.exec(stderr);
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return tags ? { colorSpace: tags[1], colorPrimaries: tags[2], colorTransfer: tags[3] } : {};
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}
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