50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
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// Re-encode the raw Remotion output to a browser-safe MP4 then delete
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// the raw file. The previous pipeline used `-c:v copy` which preserved
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// `pix_fmt=yuvj420p` (JPEG full-range) — Chrome refuses to decode that
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// correctly and the video ships as a black square on the marketing page.
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//
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// Flags below were verified to produce a tag the browsers accept:
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// pix_fmt=yuv420p, color_range=tv, profile=Main, level=4.0, BT.709.
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import { spawnSync } from 'node:child_process';
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import { existsSync, unlinkSync } from 'node:fs';
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import { resolve, dirname } from 'node:path';
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import { fileURLToPath } from 'node:url';
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const __dirname = dirname(fileURLToPath(import.meta.url));
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const root = resolve(__dirname, '..');
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const rawPath = resolve(root, 'out', 'hero-raw.mp4');
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const outPath = resolve(root, 'out', 'hero.mp4');
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if (!existsSync(rawPath)) {
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console.error(`postprocess: input not found at ${rawPath}`);
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process.exit(1);
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}
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const ffmpegArgs = [
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'-y',
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'-i', rawPath,
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'-c:v', 'libx264',
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'-profile:v', 'main',
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'-level', '4.0',
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'-vf', 'format=yuv420p,colorspace=bt709:iall=bt709:fast=1',
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'-color_range', 'tv',
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'-color_primaries', 'bt709',
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'-color_trc', 'bt709',
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'-colorspace', 'bt709',
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'-preset', 'slow',
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'-crf', '23',
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'-an',
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'-movflags', '+faststart',
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outPath,
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];
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const result = spawnSync('ffmpeg', ffmpegArgs, { stdio: 'inherit' });
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if (result.status !== 0) {
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console.error(`postprocess: ffmpeg exited with code ${result.status}`);
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process.exit(result.status ?? 1);
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}
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unlinkSync(rawPath);
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console.log(`postprocess: wrote ${outPath} and removed raw input`);
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