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• How to save the stream URL chunks as a video in NodeJs

  2 octobre 2020, par Harsh Lodhi

  I'm trying to download a piece of video from the below URL using axios.

  


  https://r5---sn-gwpa-civy.googlevideo.com/videoplayback?...&range=32104-500230


  


  I'm using below code to fetch the above URL and for save the chunk to the mp4 file.

  


  axios({
        url: MY_URL`,
        method: 'GET',
        responseType: 'stream'
    }).then(function (response) {
        let buffArray = []
        response.data.on('data', (chunk) => {
            buffArray .push(chunk)
        })

        response.data.on('end', (chunk) => {
            let buff = Buffer.concat(buffArray)
            fs.writeFile('output.mp4', buff, (dt) => {
                console.log("File created");
            })
        })
    })


  


  above code is working fine and I'm able to save the video but the video is not able to play.
when I set the range in URL from &range=32104-500230 to &range=0-500230 then video is working properly. Please try to help that how can I save a video from small chunk of video stream instead of saving full video.

  


• Splitting odd and even frames in Gstreamer

  4 avril 2014, par user3498379

  I am building an application whereby I need to split a videostream(RTSP/MJPEG) into individual frames. The extracted frames then need to be put into two named pipes. I need to alternate the frames between two named pipes, i.e. even frames go to pipe one and odd frames go to pipe 2. I have been able to achieve this with ffmpeg using the following command :

  ffmpeg -i "rtsp://<ipaddress>/axis-media/media.amp?videocodec=jpeg" -vf select="mod(n-1\,2)" -vcodec mjpeg -f avi -y  -vf select="not(mod(n-1\,2))" -vcodec mjpeg -f avi -y 
  
  </ipaddress>

  However I have run into an RTP packet size issue with ffmpeg when using large resolutions e.g. 2048x1536. My question is ; is there a gstreamer equivalent command ? I have the basic gstreamer command which extracts images :

   gst-launch rtspsrc location=rtsp://<ipaddress>/axis-media/media.amp?videocodec=jpeg ! decodebin2 ! jpegenc ! multifilesink location="frame%d.jpg"
  
  </ipaddress>

  But now I need the additional piece, any help will be much appreciated.

• ffmpeg.exe returned non-zero exit status. Check stdout

  31 mars 2019, par Tech Guy

  I am trying to convert MP3 file to MP4 in Java using this ffmpeg-cli-wrapper by Andrew Brampton. But when I try to convert that It gives me this error.

  SLF4J : Failed to load class "org.slf4j.impl.StaticLoggerBinder".
  SLF4J : Defaulting to no-operation (NOP) logger implementation SLF4J :
  See http://www.slf4j.org/codes.html#StaticLoggerBinder for further
  details.

  [mp4 @ 0000022b6d40c2c0] Could not find tag for codec mpeg4
  in stream #0, codec not currently supported in container Could not
  write header for output file #0 (incorrect codec parameters ?) :
  Invalid argument Error initializing output stream 0:0 —

  Exception in
  thread "main" java.lang.RuntimeException : java.io.IOException :
  \ffmpeg\bin\ffmpeg.exe returned non-zero exit status. Check stdout.
  at
  net.bramp.ffmpeg.job.TwoPassFFmpegJob.run(TwoPassFFmpegJob.java:75)
  Caused by : java.io.IOException : \ffmpeg\bin\ffmpeg.exe returned
  non-zero exit status. Check stdout. at
  net.bramp.ffmpeg.FFcommon.throwOnError(FFcommon.java:51) at
  net.bramp.ffmpeg.FFcommon.run(FFcommon.java:113) at
  net.bramp.ffmpeg.FFmpeg.run(FFmpeg.java:184) at
  net.bramp.ffmpeg.FFmpeg.run(FFmpeg.java:202) at
  net.bramp.ffmpeg.job.TwoPassFFmpegJob.run(TwoPassFFmpegJob.java:61)
  ... 1 more

  And here is my code,

  FFmpegProbeResult fFmpegProbeResult = ffprobe.probe("/path/to/in.mp3");
  
  
  
  FFmpegBuilder builder = new FFmpegBuilder()
  
  
  
          .setInput(fFmpegProbeResult)
  
          .setFormat("mp3")
  
          .overrideOutputFiles(true)
  
  
  
          .addOutput("/path/to/out.mp4")
  
          .setFormat("mp4")
  
  
  
          .setAudioChannels(1)
  
          .setAudioCodec("aac")
  
          .setAudioSampleRate(48000)
  
          .setAudioBitRate(32768)
  
  
  
          .setVideoCodec("libx264")
  
          .setVideoFrameRate(24, 1)
  
          .setVideoResolution(640, 480)
  
  
  
          .setStrict(FFmpegBuilder.Strict.EXPERIMENTAL)
  
          .done();
  
  
  
          FFmpegExecutor executor = new FFmpegExecutor(ffmpeg, ffprobe);
  
  
  
          executor.createJob(builder).run();
  
  
  
          executor.createTwoPassJob(builder).run();

  How can I fix this error ? How to convert using ffmpeg in Java ? Anybody can help me ? Thanks in advance.