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• DownloadError : ERROR : WARNING : unable to obtain file audio codec with ffprobe in heroku

  14 mars 2021, par Alvin Ben George

  I ran into a problem when I used heroku

  


  


  discord.ext.commands.errors.CommandInvokeError : Command raised an exception : DownloadError : ERROR : WARNING : unable to obtain file audio codec with ffprobe

  


  


  I am pretty sure that my code is fine because I ran it using my laptop, with ffmpeg, ffprobe and youtube-dl installed.

  


  


  • I installed the buildpack of ffmpeg and youtube-dl in heroku https://github.com/jonathanong/heroku-buildpack-ffmpeg-latest.git, but I couldnt play songs using my bot.

    


  


  • I created a link to my Github account in order to provide the source code, I gave the procfile and requirements and all of them are correct, since I use the same venv

    


  


  • I've searched in help section of heroku and stack overflow for help, but I couldnt find anything valid as they all tell in detail about local installations

    


  


  


  Could someone please look into it and find the solution to this problem ?

  


  Thanks in advance

  


• Creating a recursive ffmpeg converter

  23 novembre 2014, par Joe Healey

  I’m trying to create a script of some sort that will convert any video files it detects within a folder (also scanning subfolders), to an .avi file of the same name, in the same place, then remove the original file. I’ve not really used cmd much for any programming/scripting so I’m stumbling over what I suspect is some pretty simple syntax issues.

  If anyone is familiar with encoding and ffmpeg, please point out whether the encoding options are wrong (I’m stumbling about in the dark at the moment).

  Using this thread, I’m working with something currently resembling :

  dir/b/s *.(mkv|mp4|m4v|wmv) >listing.txt  #Make a list of all the files with certain extensions, for reading.
  
  for /F "delims=;" %%F in (listing.txt) do ffmpeg.exe  -i "%%F" -c:v libx264 -preset slow -crf 20 -c:a libvo_aacenc -b:a 128k "%%~na.avi"
  
  #Then to delete original files
  
  for /F "delims=;" %%F in (listing.txt) do del %%F
  
  del listing.txt

  The first issue I have is that I’d like to be able to populate the list with all the common video types. I’m imagining cmd has some syntax similar to perl string matching e.g. A(B|C) would match AB and AC that I could mimic for matching any video file extension ? (I’ve written it in the code above to illustrate the point but I know it doesn’t work).

  I hope that is enough to try and illustrate what I’m attempting.

• JavaFXFrameConverter consuming insane amounts of memory

  17 juillet 2023, par iexav

  The JavaFXFrameConverter (from the wrapper of the ffmpeg C library in java) convert() method is consuming an outrageous amount of memory. To elaborate a bit more, it does not happen usually. If I just make an instance of the class in my main method, grab a frame via FFMpegFrameGrabber and give it to the convert() method the memory usage is pretty much none. However, when I attempt to do pretty much the exact same in a class I made using an ExecutorService my memory usage jumps up to 8 gigabytes when convert is called. The converter and executor service are declared as member variables of my class. Namely :

  


      final JavaFXFrameConverter converter = new JavaFXFrameConverter();
    private  ExecutorService           videoExecutor;


  


  (the videoExecutor is instantiated in the constructor of the class :

  


  videoExecutor=Executors.newSingleThreadExecutor();


  


  Now, the method I am using for processing of the video frames is this :

  


      private void processVideo(){
        videoExecutor.submit(() -> {
            processingVideo.set(true);
            try{

                while(processingVideo.get() && (videoQueue.peek())!=null){

                    final Frame cloneFrame = videoQueue.poll();
                    final Image image = converter.convert(cloneFrame);
                    final long timeStampDeltaMicros = cloneFrame.timestamp - timer.elapsedMicros();
                    if (timeStampDeltaMicros > 0) {
                        final long delayMillis = timeStampDeltaMicros / 1000L;
                        try {
                            Thread.sleep(delayMillis);
                        } catch (InterruptedException e) {
                            Thread.currentThread().interrupt();
                        }
                    }

                    cloneFrame.close();
                    System.out.println("submitted image");
                videoListener.submitData(image);
                }
            }catch (NullPointerException e){
                NullPointerException ex = new NullPointerException("Error while processing video frames.");
            videoListener.notifyFailure(ex);
            }

            processingVideo.set(false);

        });
    }


  


  I sent the whole method for a bit more context but realistically speaking the only part that is of real significance is the converter.conver(cloneFrame) ; I used the intelliJ profiler and also the debugger and this is exactly where the problem occurs. When convert is called after doing some stuff it eventually ends up in this method :

  


          public <t extends="extends" buffer="buffer"> void getPixels(int x, int y, int w, int h, WritablePixelFormat<t> pixelformat, T buffer, int scanlineStride) {&#xA;            int fss = this.frame.imageStride;&#xA;            if (this.frame.imageChannels != 3) {&#xA;                throw new UnsupportedOperationException("We only support frames with imageChannels = 3 (BGR)");&#xA;            } else if (!(buffer instanceof ByteBuffer)) {&#xA;                throw new UnsupportedOperationException("We only support bytebuffers at the moment");&#xA;            } else {&#xA;                ByteBuffer bb = (ByteBuffer)buffer;&#xA;                ByteBuffer b = (ByteBuffer)this.frame.image[0];&#xA;&#xA;                for(int i = y; i &lt; y &#x2B; h; &#x2B;&#x2B;i) {&#xA;                    for(int j = x; j &lt; x &#x2B; w; &#x2B;&#x2B;j) {&#xA;                        int base = 3 * j;&#xA;                        bb.put(b.get(fss * i &#x2B; base));&#xA;                        bb.put(b.get(fss * i &#x2B; base &#x2B; 1));&#xA;                        bb.put(b.get(fss * i &#x2B; base &#x2B; 2));&#xA;                        bb.put((byte)-1);&#xA;                    }&#xA;                }&#xA;&#xA;            }&#xA;        }&#xA;</t></t>

  


  Now, everything up until this point is fine. The memory usage is at around 130mb but alas, when execution enters in these 2 for loops that's where the downright stupid memory usage occurs. Every single one of these bb.put calls is netting me around 3 more megabytes of memory usage. By the end of it you can probably guess what happens. Also all of these memory allocations do happen on the stack so I'm assuming that's why my memory usage stops at around 8-8.5 gigabytes otherwise the program would crash (that has also happened, out of memory exception thrown, but it doesn't usually happen, it kind of just lingers at those 8 gigabytes.) Frankly speaking I'm at a bit of a loss. I haven't seen virtually anyone anywhere mention this ever and I ran out of things to try to fix this so I am making this post.

  


  By the way another thing I tried is make the ExecutorService in the same class as the main method and when I submitted there I also didn't have these memory problems.