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• Hello, I have some problems with ffmpeg.concat, there are logs

  12 mai 2022, par Matvey

  Log :

  


  [swscaler @ 0x27d3c10] [swscaler @ 0x2886fe0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x27d3c10] [swscaler @ 0x283be10] deprecated pixel format used, make sure you did set range correctly
Output #0, avi, to '/home/pi/Desktop/VIDEOREG/2022:05:12_09:51:57:856_v1.avi':
  Metadata:
    software        : Lavf58.45.100
    ISFT            : Lavf59.20.101
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1080x720, q=2-31, 200 kb/s, 25 fps, 25>
    Metadata:
      encoder         : Lavc59.25.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
Output #0, avi, to '/home/pi/Desktop/VIDEOREG/2022:05:12_09:51:57:911_v3.avi':
  Metadata:
    software        : Lavf58.45.100
    ISFT            : Lavf59.20.101
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1080x720, q=2-31, 200 kb/s, 25 fps, 25>
    Metadata:
      encoder         : Lavc59.25.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
Output #0, avi, to '/home/pi/Desktop/VIDEOREG/2022:05:12_09:51:57:890_v2.avi':
  Metadata:
    software        : Lavf58.45.100
    ISFT            : Lavf59.20.101
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1080x720, q=2-31, 200 kb/s, 25 fps, 25>
    Metadata:
      encoder         : Lavc59.25.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
[mjpeg @ 0x27aaa10] mjpeg_decode_dc: bad vlc: 0:0 (0x27b7c20)trate=8122.4kbits/s speed=1.33e+04x
[mjpeg @ 0x27aaa10] error dc
[mjpeg @ 0x27aaa10] error y=18 x=37
[mjpeg @ 0x27aaa10] EOI missing, emulating
[mjpeg @ 0x29551c0] error count: 65
[mjpeg @ 0x29551c0] error y=2 x=17
###############################################


  


  My part of code for concatenation audio and video :

  


  def video_with_audio(number, filename, video):
        ms = datetime.today().strftime('%f') + '0000'
        ms = ms[:3]
        name = datetime.today().strftime('%Y:%m:%d_%H:%M:%S:')
        title_video = f'/home/pi/Desktop/VIDEOREG/{name}{ms}{number}.avi'
        print(title_video)
        os.system("ffmpeg -i " + video + " -vf setpts=PTS*2 " + title_video)
        ####################################################
        ms_1 = datetime.today().strftime('%f') + '0000'
        ms_1 = ms_1[:3]
        name_1 = datetime.today().strftime('%Y:%m:%d_%H:%M:%S:')
        title_video = f'/home/pi/Desktop/VIDEOREG/{name}{ms}{number}.avi'
        title_video_1 = f'/home/pi/Desktop/VIDEOREG/{name_1}{ms_1}{number}.avi'
        input_audio = ffmpeg.input(filename)
        input_video = ffmpeg.input(title_video)
        print(title_video_1)
        ffmpeg.concat(input_video, input_audio, v=1, a=1).output(title_video_1).run()


  


  There are slight delays during video recording, because I print information from sensors on video, can this affect the concatenation of video with audio ? (Saved video is accelerated ? that's why at the beginning I used slowing video down.)

  


• problems reading output from ffmpeg

  4 août 2016, par JLucas

  I am trying to read raw BGR24 image data from ffmpeg into a C++ application. The C++ application will then process the image further using openCV.
  jpg -> ffmpeg -> application -> openCV

  I started by storing the output from ffmpeg into a file and reading that file from within the application. OpenCV apparently accepts this as it happily displays the image.
  However, it fails when piping the output from ffmpeg directly into stdin of the application.

  I changed the program to just save the input to a file and I compared the two files. The first 1856 bytes are the same, but after that the file saved from stdin differs and after that the entire file is just hex D1 (or decimal 209).

  bytes read from stdin

  bytes read from file

  I presume that I am making a mistake while reading stdin instead of ffmpeg having a different output. But I find it very strange that the first part is the same.
  This is the code I use to read stdin

  char* img = (char*) malloc(FRM_SIZE_BYTES);
  
  cout << "array address: " << &img;
  
  cout << "array of size: " << FRM_SIZE_BYTES << endl;
  
  
  
  int read = int read = read_stdin(img, FRM_SIZE_BYTES);
  
  cout << "read " << read << " bytes" << endl;
  
  
  
  int read_stdin(char* buffer, int count) 
  
  {
  
      int read = 0;
  
      char in;
  
      for (int i = 0; i < count; i++) {
  
          cin >>  in;
  
          buffer[i] = in;
  
          read++;
  
      }
  
      return read;
  
  }

  this is how I try to read the file

  ifstream image;
  
  image.open("img.raw", ios_base::binary | ios_base::in);
  
  std::streampos start, end;  
  
  char* imgFile = (char*)malloc(FRM_SIZE_BYTES);
  
  image.read(imgFile, FRM_SIZE_BYTES);
  
  image.close();

  Any help would be appreciated

• Revision 78629508f2 : Merge "VPX : removed step checks from neon convolve code"

  14 août 2015, par James Zern

  Merge "VPX : removed step checks from neon convolve code"