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• ffmpeg library rotates video after compression Android

  14 septembre 2016, par Leo Wiki

  I’m using ffmpeg library for video file compression in my Android project.

  To implement ffmpeg I refereed this link. Compression is working fine but after compression process this library rotating my video 90 degree which I don’t want to be happen. I googled a lot but yet not reach to solution which can tell me how to stop rotating the video. For video compression I’m using the following command—

  ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -vf transpose=1 -s 160x120 -r 30 -aspect 4:3 -ab 48000 -ac 2 -ar 22050 -b 2097k /sdcard/videokit/out.mp4

  Please let me know if I can provide more information to you.

  Thank you.

• Physical Calculus Education

  2 septembre 2011, par Multimedia Mike — General

  I have never claimed to be especially proficient at math. I did take Advanced Placement calculus in my senior year of high school. While digging through some boxes, I found an old grade report from that high school year. I wondered what motivated me to save it. Maybe it’s because it offered this clue as to why I can’t perform adequately in math class :

  
  
  

  Mystery solved : I did not wear proper P.E. attire to calculus class.

• ffmpeg in server cant upload video over 4 minutes

  12 octobre 2020, par Victor01288888

  here's my code

  


    ffmpeg(stream)
      .output(videoPath)
      .on("start", function () {
        console.log("Starting video compression... please wait...");
      })
      .on("error", function (err) {
        console.log("Something went wrong: " + err.message + " " + err.name);
      })
      .outputOptions(
        "-vcodec",
        "libx264",
        "-crf",
        "35", // change the crf value: high = lower quality & size, low = higher quality & size
        "-format",
        "mp4"
      )
      .on("progress", function (progress) {
        console.log(
          "Processing: " +
            Math.round(progress.currentKbps / progress.targetSize) +
            "% done"
        );
      })
      .on("end", async function () {
        console.log("[ffmpeg] processing done");
        // finish compressing then upload to S3
        console.log("uploading to S3... please wait");
        // const stream2 = await fileType.stream(createReadStream());
        let stream2 = fs.createReadStream(videoPath);
        // saving data in aws(s3)
        let origin = uploadToS3(`${newFileName}`);
        stream2.pipe(origin.writeStream);

        origin && (await origin.promise);
        await Video.updateOne({ _id: video._id }, { status: "success" });

        // del tmp video
        fs.unlink(videoPath, (err) => {
          if (err) {
            console.error(err);
          }
          console.log("Converted file delete from tmp folder server");
        });
      })
      .run();


  


  I uses this code in my server.
If I upload video in 1 minute it's ok.
But when I upload one more then 4 minute it just not appears in AWS.
and the journey only writes 0% without any error.