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• Why is there not enough RAM when processing video in fmpeg ?

  26 mai 2022, par Mikhail Eliseev

  I run ffmpeg through .bat file , which overlays the HUD video on top of the other (overlay). I saw this method here : FFmpeg - Overlay one video onto another video ?

  


  When you run the batch file, ffmpeg starts "rendering it" and in 1-2 minutes my computer begins to show terrible lags. In the task manager I see that 12 GB of the available 16 GB of RAM is gobbled up.

  


  Code :

  


  @echo off
setlocal EnableExtensions DisableDelayedExpansion
for %%i in (*.mov *.mp4 *.mts) do (
  md "result_%%~ni"
ffmpeg -i "%%i" -i "res/intro 2018.mp4" -filter_complex "[1:v]setpts=PTS-10/TB[a]; [0:v][a]overlay=enable=gte(t\,5):shortest=1[out]" -map [out] -map 0:a -c:v libx264 -crf 18 -pix_fmt yuv420p -c:a copy -y result_%%~ni\%%~ni%%03d.mp4

) 
pause


  


  After 2 minutes, the error that the memory is not enough :


  


  Here are the specs of the computer :


  


  This is the size of the swap file (by system choice) :


  


  Example of video-file :

  


  


  


• I can't use immediately converted video with FFmpeg (Android)

  26 juin 2019, par Jose Q

  I’m using this lib to turn a video with a watermark into a corner : https://github.com/WritingMinds/ffmpeg-android-java

  To detect when the video conversion is ready I’m using this :

  try {
  
          ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
              @Override
  
              public void onFailure(String s) {
  
              }
  
  
  
              @Override
  
              public void onSuccess(String s) {
  
              }
  
  
  
              @Override
  
              public void onProgress(String s) {
  
              }
  
  
  
              @Override
  
              public void onStart() {
  
              }
  
  
  
              @Override
  
              public void onFinish() {
  
  
  
                  //outpath is: /storage/emulated/0/drawable/share1561561063811.mp4
  
                  Uri u = Uri.parse(outpath);
  
  
  
              }
  
          });
  
      } catch (FFmpegCommandAlreadyRunningException e) {
  
          // do nothing for now
  
      }

  Well, everything goes perfect so far, I can find the video through the file manager, but what I can’t do is use it immediately after onFinish() in my app.

  I can’t play the video or upload it. I’ve tried using outpath directly and also tried this method that works for other videos and I get null. :

  private String getRealPathFromURI(Uri contentUri) {
  
      String[] proj = { MediaStore.Images.Media.DATA };
  
      CursorLoader loader = new CursorLoader(this, contentUri, proj, null, null, null);
  
      Cursor cursor = loader.loadInBackground();
  
      int column_index = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
  
      cursor.moveToFirst();
  
      String result = cursor.getString(column_index);
  
      cursor.close();
  
      return result;
  
  }

• FFMPEG File Output is Still in Use By a Process

  6 mai, par Tyler Bacon

  I am trying to complete this part of my program. In this section, I am trying to speed up or slow down a video based on a factor variable. Once it's done, I use moviepy to turn it into a VideoFileClip, then I delete the file.

  


      if factor <= 2:
        system("ffmpeg -i " + paths[dex] + " -vf setpts=" + str(vfactor) + "*PTS -an ./Media/Videos/temp.mp4")
        system("ffmpeg -i " + paths[dex] + " -filter:a atempo=" + str(factor) + " -vn ./Media/ShortSounds/temp.mp3")
    elif 2 < factor < 4:
        factor = round(sqrt(factor), 1)
        system("ffmpeg -i " + paths[dex] + " -vf setpts=" + str(vfactor) + "*PTS,setpts=" + str(vfactor) + "*PTS  -an ./Media/Videos/temp.mp4")
        system("ffmpeg -i " + paths[dex] + " -filter:a atempo=" + str(factor) + ",atempo=" + str(factor) + " -vn ./Media/ShortSounds/temp.mp3")
    elif factor > 4:
        raise Exception("File " + paths[dex] + " is too long.")
    t = VideoFileClip("./Media/Videos/temp.mp4")
    t.audio = AudioFileClip("./Media/Videos/temp.mp3")
    templist.append(t)
    remove("./Media/Videos/temp.mp4")


  


  However, when the code gets to the deletion command, it has the following error :

  


  PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: './Media/Videos/temp.mp4'


  


  What's strange is, I can see the temp.mp4 file, and it runs just fine. I never get this error while manually running the temp.mp4 file.

  


  I have tried the following :

  


  

  • Waiting 5, 10, and 20 seconds before deleting the file.

  


  • Running "taskkill -f -im ffmpeg.exe" before deleting the file

  


  • I went through the debugger, and right before the deletion, I checked in task manager to see if ffmpeg was still running, and it wasn't.

  


  


  Do you guys have any idea what could be holding this up ? My code worked previously when I was trying to just do audio, but I am trying it with video and this is happening.