Video clip

/** * Video clip: download a video you are allowed to download with yt-dlp in the session's shell, and cut its first 30 * seconds with ffmpeg. The default is Big Buck Bunny (Blender Foundation, CC BY 3.0) from archive.org. * *   npx tsx node/index.ts            (BOXLINE_API_KEY; VIDEO_URL, CLIP_SECONDS; a plan with shell sessions) * * Only for videos you own, have the rights to, or that have an open licence. If the site refuses the download, the * example stops: it never disguises the downloader. Writes output/clip.mp4 and output/result.json. */import { mkdirSync, writeFileSync } from "node:fs";import { join } from "node:path";import { Boxline } from "@boxline/sdk";const out = process.env.OUTPUT_DIR ?? "output";const video = process.env.VIDEO_URL ?? "https://archive.org/download/BigBuckBunny_328/BigBuckBunny_512kb.mp4";const seconds = Number(process.env.CLIP_SECONDS ?? 30);const bx = new Boxline();const session = await bx.sessions.create({ browser: false, shell: true, timeout: 900, userMetadata: { example: "video-clip" } });console.log(`Session: ${session.id}`);try {  const sh = async (command: string, timeoutMs = 300_000) => {    const r = await session.exec(command, { env: { VIDEO_URL: video }, timeoutMs });    if (r.exitCode !== 0) throw new Error(`${command.split(" ")[0]} failed: ${(r.stderr || r.stdout).trim().split("\n").slice(-3).join(" | ")}`);    return r.stdout.trim();  };  await sh("pip install --quiet --disable-pip-version-check yt-dlp");  // Only the first part is fetched (yt-dlp hands the range to ffmpeg), not the whole film.  await sh(`mkdir -p downloads output && yt-dlp --quiet --no-progress --no-playlist --download-sections "*0-${seconds + 5}" -o "downloads/video.%(ext)s" "$VIDEO_URL"`, 600_000);  const source = await sh("ls downloads/video.* | head -1");  console.log(`Downloaded ${source}`);  await sh(`ffmpeg -loglevel error -y -i "${source}" -t ${seconds} -c:v libx264 -preset veryfast -c:a aac -movflags +faststart output/clip.mp4`, 600_000);  const duration = Number(await sh("ffprobe -v error -show_entries format=duration -of csv=p=0 output/clip.mp4"));  const clip = await session.files.read("output/clip.mp4");  mkdirSync(out, { recursive: true });  writeFileSync(join(out, "clip.mp4"), clip);  console.log(`output/clip.mp4: ${duration.toFixed(1)} s, ${Math.round(clip.length / 1024)} KB`);  writeFileSync(join(out, "result.json"), JSON.stringify({ video, seconds, source, duration, bytes: clip.length }, null, 2));} finally {  await session.stop();}

"""Video clip: download a video you are allowed to download with yt-dlp in the session's shell, and cut its first 30seconds with ffmpeg. The default is Big Buck Bunny (Blender Foundation, CC BY 3.0) from archive.org.    python python/main.py            (BOXLINE_API_KEY; VIDEO_URL, CLIP_SECONDS; a plan with shell sessions)Only for videos you own, have the rights to, or that have an open licence. If the site refuses the download, theexample stops: it never disguises the downloader. Writes output/clip.mp4 and output/result.json."""import jsonimport osfrom pathlib import Pathfrom boxline import Boxlineout = Path(os.environ.get("OUTPUT_DIR", "output"))video = os.environ.get("VIDEO_URL", "https://archive.org/download/BigBuckBunny_328/BigBuckBunny_512kb.mp4")seconds = int(os.environ.get("CLIP_SECONDS", "30"))bx = Boxline()with bx.sessions.create(browser=False, shell=True, timeout=900, user_metadata={"example": "video-clip"}) as session:    print(f"Session: {session.id}", flush=True)    def sh(command: str, timeout_ms: int = 300_000) -> str:        r = session.exec(command, env={"VIDEO_URL": video}, timeout_ms=timeout_ms)        if r["exitCode"] != 0:            tail = " | ".join((r["stderr"] or r["stdout"]).strip().split("\n")[-3:])            raise SystemExit(f"{command.split(' ')[0]} failed: {tail}")        return r["stdout"].strip()    sh("pip install --quiet --disable-pip-version-check yt-dlp")    # Only the first part is fetched (yt-dlp hands the range to ffmpeg), not the whole film.    sh(f'mkdir -p downloads output && yt-dlp --quiet --no-progress --no-playlist --download-sections "*0-{seconds + 5}" -o "downloads/video.%(ext)s" "$VIDEO_URL"', 600_000)    source = sh("ls downloads/video.* | head -1")    print(f"Downloaded {source}")    sh(f'ffmpeg -loglevel error -y -i "{source}" -t {seconds} -c:v libx264 -preset veryfast -c:a aac -movflags +faststart output/clip.mp4', 600_000)    duration = float(sh("ffprobe -v error -show_entries format=duration -of csv=p=0 output/clip.mp4"))    clip = session.files.read("output/clip.mp4")    out.mkdir(parents=True, exist_ok=True)    (out / "clip.mp4").write_bytes(clip)    print(f"output/clip.mp4: {duration:.1f} s, {len(clip) // 1024} KB")    (out / "result.json").write_text(json.dumps({"video": video, "seconds": seconds, "source": source, "duration": duration, "bytes": len(clip)}, indent=2))

# Node 18 or newer, in the example's folderexport BOXLINE_API_KEY=…   # your API keynpm install @boxline/sdk tsxnpx tsx node/index.ts

# Python 3.9 or newer, in the example's folderexport BOXLINE_API_KEY=…   # your API keypip install boxline-sdkpython python/main.py