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• Use "JPEG 2000" as long name for j2k.

  28 septembre 2011, par Carl Eugen Hoyos

  Use "JPEG 2000" as long name for j2k.

• hwcontext_vulkan : fix downloads ; use the common host map function to map frame data

  13 mars, par Lynne

  hwcontext_vulkan : fix downloads ; use the common host map function to map frame data
  This commit uses the recently exported code for host mapping images back
  
  where it was exported from.
  The function also had broken download code for image downloading since its
  
  recent refactor.
  

  • [DH] libavutil/hwcontext_vulkan.c

• Error : Cannot find ffmpeg in firebase cloud function

  6 novembre 2024, par Ahmed Wagdi

  i'm trying to compress some uploaded files to firebase storage .. using firebase cloud functions but it give me the error Error: Cannot find ffmpeg

  


  here is my function :

  


  const functions = require("firebase-functions");
const admin = require("firebase-admin");
const ffmpeg = require("fluent-ffmpeg");
const ffmpegStatic = require("ffmpeg-static");
const axios = require("axios");

// const {onSchedule} = require("firebase-functions/v2/scheduler");

admin.initializeApp();

// Ensure fluent-ffmpeg uses the binary
ffmpeg.setFfmpegPath(ffmpegStatic.path);

const db = admin.firestore();
const bucket = admin.storage().bucket();
const fs = require("fs");
const downloadVideo = async (url, outputPath) => {
  const response = await axios.get(url, {responseType: "stream"});
  const writer = fs.createWriteStream(outputPath);
  response.data.pipe(writer);
  return new Promise((resolve, reject) => {
    writer.on("finish", () => resolve(outputPath));
    writer.on("error", reject);
  });
};

const compressVideo = (videoFullPath, outputFileName, targetSize) => {
  return new Promise((resolve, reject) => {
    ffmpeg.ffprobe(videoFullPath, (err, metadata) => {
      if (err) return reject(err);
      const duration = parseFloat(metadata.format.duration);
      const targetTotalBitrate =
      (targetSize * 1024 * 8) / (1.073741824 * duration);

      let audioBitrate =
      metadata.streams.find((s) => s.codec_type === "audio").bit_rate;
      if (10 * audioBitrate > targetTotalBitrate) {
        audioBitrate = targetTotalBitrate / 10;
      }

      const videoBitrate = targetTotalBitrate - audioBitrate;
      ffmpeg(videoFullPath)
          .output(outputFileName)
          .videoCodec("libx264")
          .audioCodec("aac")
          .videoBitrate(videoBitrate)
          .audioBitrate(audioBitrate)
          .on("end", resolve)
          .on("error", reject)
          .run();
    });
  });
};

const uploadVideoWithResumableUpload = (filePath, destinationBlobName) => {
  const blob = bucket.file(destinationBlobName);
  const options = {resumable: true, validation: "crc32c"};
  return blob.createWriteStream(options).end(fs.readFileSync(filePath));
};

exports.processLessonsOnDemand =
functions.https.onRequest({timeoutSeconds: 3600, memory: "2GB"}
    , async (context) => {
      console.log("Fetching lessons from Firestore...");
      const lessonsRef = db.collection("leassons");
      const lessonsSnapshot = await lessonsRef.get();

      if (lessonsSnapshot.empty) {
        console.log("No lessons found in Firestore.");
        return; // Exit if no lessons are available
      }

      const lessonDoc = lessonsSnapshot.docs[0]; // Get the first document
      const lessonData = lessonDoc.data();

      if (lessonData.shrinked) {
        console.log(
            `Skipping lesson ID ${lessonDoc.id} as it's already shrunk.`,
        );
        return; // Exit if the first lesson is already shrunk
      }

      const videoURL = lessonData.videoURL;
      if (!videoURL) {
        console.log(
            `No video URL for lesson ID: ${lessonDoc.id}. Skipping...`,
        );
        return; // Exit if no video URL is available
      }

      const tempVideoPath = "/tmp/temp_video.mp4";

      try {
        await downloadVideo(videoURL, tempVideoPath);

        const targetSize = (fs.statSync(tempVideoPath).size * 0.30) / 1024;
        const outputCompressedVideo = `/tmp/compressed_${lessonDoc.id}.mp4`;

        await compressVideo(tempVideoPath, outputCompressedVideo, targetSize);

        await uploadVideoWithResumableUpload(
            outputCompressedVideo,
            `compressed_videos/compressed_${lessonDoc.id}.mp4`,
        );

        const newVideoURL = `https://storage.googleapis.com/${bucket.name}/compressed_videos/compressed_${lessonDoc.id}.mp4`;

        const oldVideoPath = videoURL.replace(`https://storage.googleapis.com/${bucket.name}/`, "");
        const oldBlob = bucket.file(oldVideoPath);
        await oldBlob.delete();

        await lessonsRef.doc(lessonDoc.id).update({
          videoURL: newVideoURL,
          shrinked: true,
        });

        console.log(`Processed lesson ID: ${lessonDoc.id}`);
        fs.unlinkSync(tempVideoPath); // Clean up temporary files
        fs.unlinkSync(outputCompressedVideo); // Clean up compressed file
      } catch (error) {
        console.error(`Error processing lesson ID ${lessonDoc.id}:`, error);
      }
    });