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• javacv FFmpegFrameGrabber.start() blocked,not run next line

  23 août 2017, par L.U

  when i run grabber.start it blocked,not run next line.

  FFmpegFrameGrabber grabber = new  FFmpegFrameGrabber("rtsp://admin:123456@192.168.3.2:10554/tcp/av0_0");
  
  grabber.start();
  
  final AtomicBoolean interruptFlag = new AtomicBoolean(false);

  get console message :

  • [rtsp @ 00000000004ec600] CSeq 6 expected, 0
    received.
  • [rtsp @ 00000000004ec600] CSeq 6 expected, 0
    received.
  • [rtsp @ 00000000004ec600] CSeq 6 expected, 0
    received.
  • [rtsp @ 00000000004ec600] CSeq 6 expected, 0
    received.

  how to resole it ?thanks

• Frozen video clips when concatenating mp4 videos using ffmpeg via nodje.js fluent-ffmpeg

  21 novembre 2023, par Rasmus Puls

  I'm trying to write a simple js application that takes all video files in a directory and the produce one single video consisting of all the clips combined one after another into one timeline.

  


  To test the application I have download for random short stock video clips from pexels :

Shown in order : clip 1, clip 2, clip 3, clip 4

  


  Each of the clips plays perfectly in vlc on windows (no broken or frozen frames)

  


  I use the following script to concat the clips :

  


    const ffmpeg = require('fluent-ffmpeg');

  ffmpeg()
    .input(concatFilePath)
    .inputOptions(['-f concat', '-safe 0'])
    .outputOptions(['-c copy', '-c:v libx264', '-b:v 5M', '-r 30', '-preset', 'slow'])
    .on('end', () => {
      console.log('Video clips concatenated successfully.');
    })
    .on('error', (err) => {
      console.error('Error concatenating video clips:', err);

      // Cleanup: Delete the output folder
      console.log('Cleaning up...');
      deleteOutputFolder(outputDir);
    })
    .save(outputPath);


  


  The contect of my concatFilePath (concat.txt) file looks like this :

  


  file src\input\d69de4a3-2b72-462c-be70-f8b8287b45e0\pexels-fred-c-19065853 (Original).mp4
file src\input\d69de4a3-2b72-462c-be70-f8b8287b45e0\pexels-imad-clicks-16270463 (2160p).mp4
file src\input\d69de4a3-2b72-462c-be70-f8b8287b45e0\pexels-peter-fowler-9683061 (2160p).mp4
file src\input\d69de4a3-2b72-462c-be70-f8b8287b45e0\pexels-sascha-5799767 (1080p).mp4


  


  The problem

  


  When I run the program it takes about 15 seconds to render the output video.
The first clip looks as the stock clip, but when I get to the 2nd clip it just sits frozen at the first fram of that video, and only runs for 3-4 seconds despite the stock clip is 8 seconds long. It then transitions into the 3rd clip which is renderd correctly but the rest of the video is frozen on the last frame of clip 3 instead of showing clip 4.

  


  I'm assuming that my input options are to blame for the result of the output, I have tried various other input options suggested from github thread and other sources, but none of them have produces a reasonable result.

  


• What transcoding services can people recommend ? [closed]

  3 mai 2013, par Adrian Lynch

  A client of mine needs to accept a bunch of different video files and convert them to FLV. My experience with FFMEG on a previous project has highlighted that there will be some troublesome files.

  Depending on the price my client will pay for a professional service.

  What are people using and how are you finding the service ?

  Thanks.