Recherche avancée

Sur d’autres sites (5402)

• FFMpeg not merging videos well in Nodejs on same file

  5 mai 2017, par G.Darcan

  I am using MediaStreamRecorder to make a stream, I am getting video blobs from there every 5 seconds and i want to concatenate them in one file on server-side.
  So lets say i have a video named sample_1.mp4 . When i get the next video, i want to save it as sample_2.mp4 , and append it to sample_1.mp4 with ffmpeg, and after that save the output as sample_2.mp4 again.But it only saves first video and the last video parts.Can you help me please ? Thanks.

              var fs = require('fs');
  
              fs.writeFileSync("/sample_2.mp4", message.binaryData );
  
              console.log("The file3 was saved!");
  
              var firstFile = "/sample_1.mp4";
  
              var secondFile = "/sample_2.mp4";
  
              var output = "/sample_2.mp4";
  
              var proc = ffmpeg(firstFile)
  
              .input(secondFile)
  
              .on('end', function() {
  
                  console.log('files3 have been merged succesfully');
  
              })
  
              .on('error', function(err) {
  
                  console.log('an error happened: ' + err.message);
  
              })
  
              .mergeToFile(output, "/tmp");

• How to batch "touch" files in subfolder with data from parent folder

  12 août 2019, par Constantine Grigorakis

  I have a folder named "Video" on my Desktop and inside that folder are a bunch of .MTS video files. (00000.MTS, 00001.MTS, 00002.MTS etc...)

  There is also a subfolder "H.265" (Video > H.265) which contains files (00000.mp4, 00001.mp4, 00002.mp4 etc...) which were made by converting the files from the parent folder. The problem is they don’t contain the correct date created metadata.

  I want to use the command

  touch -r 00000.MTS 00000.mp4
  
  touch -r 00001.MTS 00001.mp4
  
  ...
  
  touch -r 000mn.MTS 000mn.mp4

  to copy the date from the MTS to the mp4 file.

  Is there a way I could write a for loop or something to do this for every single file ?

  I am using MacOS Mojave.

• OpenCv and ffmpeg working toghether on iOS

  1er avril 2014, par jjca

  I'm developing an iOS app which captures frames from camera with openCV, following this tutorial, and encodes those frames into a video using ffmpeg.

  The capture works fine, the problem comes with the ffmpeg part. I'm getting the following linker error when i try to use anything of ffmpeg :

  Undefined symbols for architecture armv7 :
  "avcodec_find_encoder(AVCodecID)", referenced from :
  -[ViewController processImage :] in ViewController.o
  ld : symbol(s) not found for architecture armv7
  clang : error : linker command failed with exit code 1 (use -v to see invocation)

  It only happens when the class file is named *.mm but not using ffmpeg in pure objective-c code.

  I'm using the binaries provided by openCV and compiling the ffmpeg ones by myself.

  Would compile them together fix the problem ? is possible to this ?