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• Download Instagram Livestreams [closed]

  19 décembre 2020, par UnixCoon

  I've been looking for what Instagram livestreams can download for a long time. I can only record you via screen recording on my iPhone. But I would much rather just download it with my computer.

  


  I've tried a lot, but I can't get the video address where a live stream is playing. I know that it is possible to download a YouTube livestream, for example, with ffmpeg.

  


  Maybe any of you know how I download Instagram livestreams ? I would be very, very happy.

  


  I am grateful for every answer
Greetings UnixCoon

  


• Ffmpeg only receives a piece of information from the pipe

  4 juillet 2017, par Maxim Fedorov

  First of all - my english is not very good, i`m sorry for that.

  I use ffmpeg from c# to convert images to video. To interact with ffmpeg, I use pipes.

  public async Task ExecuteCommand(
  
          string arguments,
  
          Action<namedpipeserverstream> sendDataUsingPipe)
  
      {
  
          var inStream = new NamedPipeServerStream(
  
              "from_ffmpeg",
  
              PipeDirection.In,
  
              1,
  
              PipeTransmissionMode.Byte,
  
              PipeOptions.Asynchronous,
  
              PipeBufferSize,
  
              PipeBufferSize);
  
  
  
          var outStream = new NamedPipeServerStream(
  
              "to_ffmpeg",
  
              PipeDirection.Out,
  
              1,
  
              PipeTransmissionMode.Byte,
  
              PipeOptions.Asynchronous,
  
              PipeBufferSize,
  
              PipeBufferSize);
  
  
  
          var waitInConnectionTask = inStream.WaitForConnectionAsync();
  
          var waitOutConnectionTask = outStream.WaitForConnectionAsync();
  
  
  
          byte[] byteData;
  
  
  
          using (inStream)
  
          using (outStream)
  
          using (var inStreamReader = new StreamReader(inStream))
  
          using (var process = new Process())
  
          {
  
              process.StartInfo = new ProcessStartInfo
  
              {
  
                  RedirectStandardOutput = true,
  
                  RedirectStandardError = true,
  
                  RedirectStandardInput = true,
  
                  FileName = PathToFfmpeg,
  
                  Arguments = arguments,
  
                  UseShellExecute = false,
  
                  CreateNoWindow = true
  
              };
  
  
  
              process.Start();
  
  
  
              await waitOutConnectionTask;
  
  
  
              sendDataUsingPipe.Invoke(outStream);
  
  
  
              outStream.Disconnect();
  
              outStream.Close();
  
  
  
              await waitInConnectionTask;
  
  
  
              var logTask = Task.Run(() => process.StandardError.ReadToEnd());
  
              var dataBuf = ReadAll(inStream);
  
  
  
              var shouldBeEmpty = inStreamReader.ReadToEnd();
  
              if (!string.IsNullOrEmpty(shouldBeEmpty))
  
                  throw new Exception();
  
  
  
              var processExitTask = Task.Run(() => process.WaitForExit());
  
              await Task.WhenAny(logTask, processExitTask);
  
              var log = logTask.Result;
  
  
  
              byteData = dataBuf;
  
  
  
              process.Close();
  
              inStream.Disconnect();
  
              inStream.Close();
  
          }
  
  
  
          return byteData;
  
      }
  
  </namedpipeserverstream>

  Action "sendDataUsingPipe" looks like

  Action<namedpipeserverstream> sendDataUsingPipe = stream =>
  
          {
  
              foreach (var imageBytes in data)
  
              {
  
                  using (var image = Image.FromStream(new MemoryStream(imageBytes)))
  
                  {
  
                      image.Save(stream, ImageFormat.Jpeg);
  
                  }
  
              }
  
          };
  
  </namedpipeserverstream>

  When I send 10/20/30 images (regardless of the size) ffmpeg processes everything.
  When I needed to transfer 600/700 / .. images, then in the ffmpeg log I see that it only received 189-192, and in the video there are also only 189-192 images.
  There are no errors in the logs or exceptions in the code.

  What could be the reason for this behavior ?

• Crop and pinch zoom image with FFMPEG

  27 septembre 2022, par hugger

  I am working on a simple photo editor component for a mobile app which requires the user to be able to pan and scale (zoom) an image to be cropped. S/O to @kesh for the help so far !

  


  With the pinch zoom value which ranges from 1-5, I wish to use this in my FFMPEG execution along with the crop command :

  


    cropSelected() {
    this.setState({ isCropping: true });

    const diff =
      this.props.videoHeight / (this.state.aspectRatio * deviceWidth);
    const offsetDiff = this.state.offsetTopTranslate * diff;

    var filterPathPostCrop =
      this.props.type === 'photo'
        ? RNFS.DocumentDirectoryPath + '/afterCrop.png'
        : this.props.type === 'gif'
        ? RNFS.DocumentDirectoryPath + '/afterCrop.gif'
        : RNFS.DocumentDirectoryPath + '/afterCrop.mp4';
    //hardcoded zoom at 1.2x for example!
    FFmpegKit.execute(
      `-y -i ${this.state.mediaSource} -vf "crop=iw/1.2:ih/1.2:0:${offsetDiff},scale=iw:-1" -qscale 0 -frames:v 1 ${filterPathPostCrop}`
    ).then(async (session) => {
      const returnCode = await session.getReturnCode();
      if (ReturnCode.isSuccess(returnCode)) {
        // SUCCESS

        Animated.spring(this._pinchScale, {
          toValue: 1,
          useNativeDriver: true,
        }).start();

        this.setState(
          {
            mediaSource: filterPathPostCrop,
            videoSourcePreview: `${filterPathPostCrop}?${new Date().getTime()}`,
            ffMPEGinProgress: null,
            aspectRatio: 1080 / 1080,
            videoTime: 0,
            isPlayingVideo: false,
            isCropping: false,
            filterOutputIsAlt: !this.state.filterOutputIsAlt,
            wasCropped: true,
          });
      } else if (ReturnCode.isCancel(returnCode)) {
        // CANCEL
      } else {
        // ERROR
        alert('error');
      }
    });
  }


  


  I drew this to illustrate what I am trying to achieve here.

  


  

  


  I hope this helps !