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• How to fix the problem I'm having with FFmpeg ?

  23 février 2023, par John

  I'm working with the ffmpeg library to convert mp4 video files to mp3 audio files.
Here is my code :

  


  package com.exer;


import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Environment;
import android.widget.Toast;
import com.github.hiteshsondhi88.libffmpeg.ExecuteBinaryResponseHandler;
import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
import com.github.hiteshsondhi88.libffmpeg.FFmpegLoadBinaryResponseHandler;

public class MainActivity extends Activity {
    
    FFmpeg ffmpeg;
    private ProgressDialog progressDialog;
    
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    
        
        
        try {
            setUp();
            String[] command = {
                "-i", getPaths()+"/dir/input.mp4", "-vn", getPaths()+"/dir/output.mp3"
            };
            //convert("ffmpeg -i input.mp4 -vn output.mp3");
            convert(command);
            
        } catch (Exception e) {
            Toast.makeText(getApplicationContext(), e.getCause().toString(), Toast.LENGTH_SHORT).show();
        }
    }
    
    
    public void setUp() throws Exception {
        
        if(ffmpeg == null) {
            
            ffmpeg = FFmpeg.getInstance(this);
            ffmpeg.loadBinary(new FFmpegLoadBinaryResponseHandler(){
                    
            @Override
            public void onFailure() {
                Toast.makeText(getApplicationContext(), "failed to load library", Toast.LENGTH_SHORT).show();   
            }
                    
            @Override
            public void onSuccess() {
                Toast.makeText(getApplicationContext(), "loaded!", Toast.LENGTH_SHORT).show();
            }
                    
            @Override
            public void onStart() {
                        
            }
                    
            @Override
            public void onFinish() {
                        
            }
                    
                    
            });
            
        }
        
    }
    
    
    private void convert(String[] cmd) throws Exception {
        
        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler(){
            
            @Override
            public void onFailure(String message){
                super.onFailure(message);
            }
            
            @Override
            public void onFinish(){
                super.onFinish();
                Toast.makeText(getApplicationContext(), "finished!", Toast.LENGTH_SHORT).show();
            }
            
            @Override
            public void onStart(){
                super.onStart();
                Toast.makeText(getApplicationContext(), "start conversion...", Toast.LENGTH_SHORT).show();
            }
            
            @Override
            public void onProgress(String message){
                super.onProgress(message);
            }
        });
        
    
    }
    
    private String getPaths() {
        return Environment.getExternalStorageDirectory().getPath();
    }
    
}


  


  When I run the app, the Toast messages are shown :

  


  loaded!
start converting...
finished! as I write them in the functions, apart that nothing else happens the file is not converted what's wrong ?

  


  Here my manifest file :

  


  &lt;?xml version="1.0" encoding="utf-8"?>&#xA;<manifest package="com.exer">&#xA;    &#xA;    &#xA;    &#xA;    &#xA;    &#xA;        &#xA;            &#xA;                <action></action>&#xA;&#xA;                <category></category>&#xA;            &#xA;        &#xA;    &#xA;&#xA;</manifest>&#xA;

  


  I've tried to delete the specified file on the phone to see what erros I might got, but still those three Toasts.

  


• Can't install FFMPEG using pip

  22 juin 2023, par turrnut

  I tried to install ffmpeg using pip like this

  


  pip install ffmpeg


  


  However I got the following error :

  


  Collecting ffmpeg&#xA;  Using cached ffmpeg-1.4.tar.gz (5.1 kB)&#xA;  Preparing metadata (setup.py) ... error&#xA;  error: subprocess-exited-with-error&#xA;&#xA;  &#xD7; python setup.py egg_info did not run successfully.&#xA;  │ exit code: 1&#xA;  ╰─> [34 lines of output]&#xA;      Traceback (most recent call last):&#xA;        File "<string>", line 2, in <module>&#xA;        File "", line 34, in <module>&#xA;        File "C:\Users\vwu20\AppData\Local\Temp\pip-install-rdqrdeeq\ffmpeg_3cdda176f3f04ceea4a14d868e94924e\setup.py", line 13, in <module>&#xA;          setup(&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\setuptools\__init__.py", line 87, in setup&#xA;          return distutils.core.setup(**attrs)&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\setuptools\_distutils\core.py", line 147, in setup&#xA;          _setup_distribution = dist = klass(attrs)&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\setuptools\dist.py", line 476, in __init__&#xA;          _Distribution.__init__(&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\setuptools\_distutils\dist.py", line 282, in __init__&#xA;          self.finalize_options()&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\setuptools\dist.py", line 899, in finalize_options&#xA;          for ep in sorted(loaded, key=by_order):&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\setuptools\dist.py", line 898, in <lambda>&#xA;          loaded = map(lambda e: e.load(), filtered)&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\importlib\metadata\__init__.py", line 171, in load&#xA;          module = import_module(match.group(&#x27;module&#x27;))&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\importlib\__init__.py", line 126, in import_module&#xA;          return _bootstrap._gcd_import(name[level:], package, level)&#xA;        File "<frozen>", line 1050, in _gcd_import&#xA;        File "<frozen>", line 1027, in _find_and_load&#xA;        File "<frozen>", line 1006, in _find_and_load_unlocked&#xA;        File "<frozen>", line 688, in _load_unlocked&#xA;        File "<frozen>", line 883, in exec_module&#xA;        File "<frozen>", line 241, in _call_with_frames_removed&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\py2app\build_app.py", line 37, in <module>&#xA;          from py2app.create_appbundle import create_appbundle&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\py2app\create_appbundle.py", line 9, in <module>&#xA;          from py2app.util import make_exec, makedirs, mergecopy, mergetree, skipscm&#xA;        File "C:\Users\vwu20\AppData\Local\Programs\Python\Python310\lib\site-packages\py2app\util.py", line 5, in <module>&#xA;          import fcntl&#xA;      ModuleNotFoundError: No module named &#x27;fcntl&#x27;&#xA;      [end of output]&#xA;&#xA;  note: This error originates from a subprocess, and is likely not a problem with pip.&#xA;error: metadata-generation-failed&#xA;&#xA;&#xD7; Encountered error while generating package metadata.&#xA;╰─> See above for output.&#xA;&#xA;note: This is an issue with the package mentioned above, not pip.&#xA;hint: See above for details.&#xA;</module></module></module></frozen></frozen></frozen></frozen></frozen></frozen></lambda></module></module></module></string>

  


  The error message says that it's missing a package called fcntl, so i tried to install it using

  


  pip install fcntl


  


  The attempt to install fcntl produce the following error :

  


  ERROR: Could not find a version that satisfies the requirement fcntl (from versions: none)
ERROR: No matching distribution found for fcntl


  


  Can anyone tell me what I did wrong ? I am using windows 11, python 3.10, pip 23.1.2
Help would be appreciated.

  


• Encoding video using FFmpeg and FreeImage

  14 mai 2014, par mike

  I have to make a video encoder to encode video using mjpeg codec from many jpgs saved on the disk. I use FreeImage to load images and ffmpeg to encode. Unfortunately, the output video isn’t that what I expect. I can’t play it in MPC. VLC can play it but there is only a single quick flash of the last picture I loaded. I want to have 1 fps video and for example I loaded 4 frames so my video should last 4 seconds.

  Input pictures are in BGR24 pixel format.

  What is more, when I run my code I got swscaler warning that picture format YUVJ420P is deprecated but I cant find another pixel format which is suitable for MJPEG codec.

  Here is my source code :

  AVPixelFormat in_pix_fmt = AV_PIX_FMT_BGR24;
  
  AVPixelFormat out_pix_fmt = AV_PIX_FMT_YUVJ420P;
  
  
  
  AVCodec *pCodec;
  
  AVCodecContext *pCodecCtx = NULL;
  
  int out_size = 0;
  
  int size, outbuf_size, i, outpic_size, w, h;
  
  FILE *file;
  
  const char *videofile_name = "test_video_cpp.avi";
  
  AVFrame *picture, *outpic;
  
  uint8_t *outbuf, *picture_buf, *outpic_buf;
  
  
  
  av_register_all();
  
  
  
  pCodec = avcodec_find_encoder(CODEC_ID_MJPEG);
  
  if (!pCodec)
  
  {
  
      cout << "Codec not found\n\n";
  
      return 1;
  
  }
  
  
  
  pCodecCtx = avcodec_alloc_context3(pCodec);
  
  picture = avcodec_alloc_frame();
  
  outpic = avcodec_alloc_frame();
  
  
  
  pCodecCtx->codec_id = CODEC_ID_MJPEG;
  
  pCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
  
  pCodecCtx->pix_fmt = out_pix_fmt;
  
  pCodecCtx->bit_rate = 400000;
  
  pCodecCtx->width = 1688;            
  
  pCodecCtx->height = 728;
  
  pCodecCtx->time_base.num = 1;           
  
  pCodecCtx->time_base.den = 1;       //fps
  
  pCodecCtx->max_b_frames = 0;
  
  
  
  outbuf_size = 500000;
  
  outbuf = new uint8_t[outbuf_size];
  
  
  
  if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0)     //open codec
  
  {
  
      cout << "Could not open codec\n";
  
      exit(1);
  
  }
  
  
  
  file = fopen(videofile_name, "wb");                 //open file
  
  if (!file)
  
  {
  
      cout << "Could not open " << videofile_name << endl;
  
      exit(1);
  
  }
  
  
  
  outpic_size = avpicture_get_size(out_pix_fmt, pCodecCtx->width, pCodecCtx->height);
  
  outpic_buf = new uint8_t[outpic_size];
  
  cout << "Outpic size was setted to: " << outpic_size << endl;
  
  
  
  size = pCodecCtx->width * pCodecCtx->height;
  
  picture_buf = new uint8_t[size * 3];
  
  
  
  
  
  for (i = 1; i < 5; i++) 
  
  {   
  
      fflush(stdout);
  
  
  
      stringstream ss;
  
      ss << i;
  
      filename = name + ss.str() + ext;
  
      path = dir + filename;
  
  
  
      dib = FreeImage_Load(FIF_JPEG, path.c_str(), 0);
  
  
  
      picture_buf = FreeImage_GetBits(dib);
  
  
  
              h = FreeImage_GetHeight(dib);
  
      w = FreeImage_GetWidth(dib);
  
  
  
      avpicture_fill((AVPicture*)picture, picture_buf, in_pix_fmt, w, h);
  
      avpicture_fill((AVPicture*)outpic, outpic_buf, out_pix_fmt, pCodecCtx->width, pCodecCtx->height);
  
  
  
      struct SwsContext* fooContext = sws_getContext(w, h, in_pix_fmt, pCodecCtx->width, pCodecCtx->height, out_pix_fmt, SWS_BICUBIC, NULL, NULL, NULL);
  
  
  
      sws_scale(fooContext, picture->data, picture->linesize, 0, pCodecCtx->height, outpic->data, outpic->linesize);
  
  
  
      //encode single frame
  
      out_size = avcodec_encode_video(pCodecCtx, outpic_buf, outpic_size, outpic);
  
      cout << "encoding frame " << i << "(size=" << out_size << ")\n";
  
      fwrite(outbuf, 1, out_size, file);
  
  
  
  }
  
  
  
  //encode delayed frames
  
  for ( ; out_size; i++) 
  
  {
  
      fflush(stdout);
  
      out_size = avcodec_encode_video(pCodecCtx, outbuf, outbuf_size, NULL);
  
      cout << "write frame " << i << "(size=" << out_size << ")\n";
  
      fwrite(outbuf, 1, out_size, file);
  
  }
  
  
  
  outbuf[0] = 0x00;
  
  outbuf[1] = 0x00;
  
  outbuf[2] = 0x01;
  
  outbuf[3] = 0xb7;
  
  fwrite(outbuf, 1, 4, file);
  
  
  
  fclose(file);
  
  delete outbuf;
  
  avcodec_close(pCodecCtx);
  
  av_free(pCodecCtx);
  
  avpicture_free((AVPicture*)picture);
  
  avpicture_free((AVPicture*)outpic);
  
  delete picture_buf;
  
  delete outpic_buf;