Recherche avancée

Sur d’autres sites (10390)

• avformat/segment : fix muxing tmcd tracks in MOV

  18 juin 2019, par Gyan Doshi

  avformat/segment : fix muxing tmcd tracks in MOV
  avformat/movenc still relies on AVCodecContext time_base to mux tmcd
  
  tracks and segment muxer did not copy that field to inner streams
  
  leading to SIGFPE in the child muxer instance.
  

  • [DH] libavformat/segment.c

• How to Kill ffmpeg process in node.js

  8 février 2017, par Sanjay

  I am using node.js code that convert Axis Ipcamera live stream into mp4 using FFMPEG

   var childProcess=require('child_process');
  
   var childArguments = [];
  
  var child=[];
  
  var cmd='ffmpeg -i rtsp://172.24.22.117:554/axis-media/media.amp -vcodec libx264 -pix_fmt yuv420p -profile:v baseline -preset slower -crf 18 -vf "scale=trunc(in_w/2)*2:trunc(in_h/2)*2"'+' '+__dirname+'/uploads/ouput.mp4';
  
  
  
    child=childProcess.exec(       
  
          cmd,
  
          childArguments,
  
          {            
  
              env: process.env,
  
              silent:true
  
          },  function (err, stdout, stderr) {
  
              if (err) {
  
                  throw err;
  
              }
  
              console.log(stdout);
  
  
  
          });     
  
  
  
          //    here generate events for listen child process (works properly)
  
      // Listen for incoming(stdout) data
  
      child.stdout.on('data', function (data) {
  
          console.log("Got data from child: " + data);
  
      });
  
  
  
      // Listen for any errors:
  
      child.stderr.on('data', function (data) {
  
          console.log('There was an error: ' + data);
  
      });
  
  
  
      // Listen for exit event
  
      child.on('exit', function(code) {
  
          console.log('Child process exited with exit code ' + code);
  
          child.stdout.pause();
  
          child.kill();
  
      });

  my above code works perfectly. It gives the output as I want, but I am not able to kill(stop) the ffmpeg command. I am using the code below for stopping the process, but in background it still continues.

  child.kill("SIGTERM"); 

  I also used following commands : child.kill(’SIGUSR1’) ; child.kill("SIGHUP") ; child.kill("SIGINT") ;child.kill(’SIGUSR2’) ; for killing this process but it not works.

  Currently I forcefully kill the node application to stop ffmpeg command and generate mp4 file. I do not want this.
  But I want commands that stop ffmpeg process and generate mp4 file, without killing the node application.

• Resume transcoding a video with ffmpeg

  25 novembre 2014, par Jonathan.

  I have a node server that uses child-process to use ffmpeg to convert a video to mp4. However if the server crashes while transcoding, then I’d like to resume transcoding the file (similar to -C with curl).

  I figured I could just start transcoding the file from where it finished to a seperate file and then just concat the two. And while transcoding the file from where it finished works and the file that starts midway plays back fine, when I concat the two files with ffmpeg -i "concat:part1.mp4|part2.mp4" -c copy ouput.mp4 Only the first part will play, and when it gets to the second part it just stays on the last frame of the first part or goes black depending on the video player. (But playing part2.mp4 itself works fine)

  There isn’t any error during either conversion or the concat.