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• FFMPEG With PHP Upload

  27 décembre 2014, par Will S.

  I’ve created an upload form that uses Ajax to dynamically upload image files to my webserver, and then uses shell_exec and ffmpeg to resize the images (and convert them to jpg, if they are already the correct size), and then save the resulting file. I’m getting really strange behaviour with it. It works about 50% of the time (so far I’ve only tested with JPG and PNG files). Whenever it fails, I get this results :

  ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Dec 23 2014 16:55:38 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
    configuration: 
  
    libavutil      54. 15.100 / 54. 15.100
  
    libavcodec     56. 13.100 / 56. 13.100
  
    libavformat    56. 15.102 / 56. 15.102
  
    libavdevice    56.  3.100 / 56.  3.100
  
    libavfilter     5.  2.103 /  5.  2.103
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
  /tmp/phpU0pnje: Invalid data found when processing input

  Here’s the PHP code :

  if ($file_info[0] == 'image'){
  
          $image_info = getimagesize($_FILES['upload_media_hidden']['tmp_name'][$i]);
  
          $longest_edge = ($image_info[0] > $image_info[1]) ? $image_info[0] : $image_info[1];
  
          $aspect_ratio = $image_info[0]/$image_info[1];
  
          $aspect_ratio_s = ($image_info[0] > $image_info[1]) ? '200x' . (int)(200/$aspect_ratio) : (int)(200*$aspect_ratio) . 'x200';
  
          $aspect_ratio_m = ($image_info[0] > $image_info[1]) ? '400x' . (int)(400/$aspect_ratio) : (int)(400*$aspect_ratio) . 'x400';
  
          $aspect_ratio_l = ($image_info[0] > $image_info[1]) ? '700x' . (int)(700/$aspect_ratio) : (int)(700*$aspect_ratio) . 'x700';
  
  
  
          if ($longest_edge > 200){
  
                  $file_s = shell_exec('ffmpeg -i ' . escapeshellarg($_FILES['upload_media_hidden']['tmp_name'][$i]) . ' -f image2 -s ' . $aspect_ratio_s . ' - 2>&1');
  
          }
  
  
  
        ................more processing below

  So the ffmpeg command essentially looks like this :

  ffmpeg -i ’SOMEFILE.jpg’ -f image2 -s 400x200 -

  When I run that command in bash to the actual file (not the temporary file when I upload it to my form), it works fine. I’m guessing the issue is with the pipe, but I’m not sure. Any ideas ?

  Thanks !

  Update :
  When I run this code :

  if ($file_info[0] == 'image'){
  
          $image_info = getimagesize($_FILES['upload_media_hidden']['tmp_name'][$i]);
  
          $longest_edge = ($image_info[0] > $image_info[1]) ? $image_info[0] : $image_info[1];
  
          $aspect_ratio = $image_info[0]/$image_info[1];
  
          $aspect_ratio_s = ($image_info[0] > $image_info[1]) ? '200x' . (int)(200/$aspect_ratio) : (int)(200*$aspect_ratio) . 'x200';
  
          $aspect_ratio_m = ($image_info[0] > $image_info[1]) ? '400x' . (int)(400/$aspect_ratio) : (int)(400*$aspect_ratio) . 'x400';
  
          $aspect_ratio_l = ($image_info[0] > $image_info[1]) ? '700x' . (int)(700/$aspect_ratio) : (int)(700*$aspect_ratio) . 'x700';
  
  
  
          if ($longest_edge > 200){
  
                  move_uploaded_file($_FILES['upload_media_hidden']['tmp_name'][$i],'/tmp/TEST.jpg');
  
                  system('ffmpeg -i /tmp/TEST.jpg -f image2 -s ' . $aspect_ratio_s . ' - 2>&1');
  
  
  
                  $file_s = system('ffmpeg -i ' . escapeshellarg($_FILES['upload_media_hidden']['tmp_name'][$i]) . ' -f image2 -s ' . $aspect_ratio_s . ' - 2>&1');

  I get this result from php :

  ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Dec 23 2014 16:55:38 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
    configuration: 
  
    libavutil      54. 15.100 / 54. 15.100
  
    libavcodec     56. 13.100 / 56. 13.100
  
    libavformat    56. 15.102 / 56. 15.102
  
    libavdevice    56.  3.100 / 56.  3.100
  
    libavfilter     5.  2.103 /  5.  2.103
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
  Input #0, image2, from '/tmp/TEST.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 54530 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1024x1432 [SAR 1:1 DAR 128:179], 25 tbr, 25 tbn, 25 tbc
  
  [swscaler @ 0x2bce0c0] deprecated pixel format used, make sure you did set range correctly
  
  Output #0, image2, to 'pipe:':
  
    Metadata:
  
      encoder         : Lavf56.15.102
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc), 143x200 [SAR 25600:25597 DAR 128:179], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc56.13.100 mjpeg
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native))
  
  Press [q] to stop, [?] for help
  
  �����JFIF��d�c������Lavc56.13.100����C�     
  
  ----FILE OUTPUT...edited out for clarity---
  
  ���frame=    1 fps=0.0 q=3.7 Lsize=N/A time=00:00:00.04 bitrate=N/A    
  
  video:5kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead:     unknown
  
  ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Dec 23 2014 16:55:38 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
    configuration: 
  
    libavutil      54. 15.100 / 54. 15.100
  
    libavcodec     56. 13.100 / 56. 13.100
  
    libavformat    56. 15.102 / 56. 15.102
  
    libavdevice    56.  3.100 / 56.  3.100
  
    libavfilter     5.  2.103 /  5.  2.103
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
  /tmp/phpxqYzHN: No such file or directory
  
  /tmp/phpxqYzHN: No such file or directory

  So it seems to work if I move the file first ? It’s really important that I don’t have any extra disk io, so this solution wouldn’t be acceptable...

  SOLUTION :
  So the problem was that ffmpeg was not able to recognize the input file type, since PHP’s tmp files don’t end with an extension (seems like a bug that ffmpeg looks at the extension rather than the internal mime type/headers). The solution was that I needed to add "-f image2" to the beginning of my command, so it ended up looking something like this :

  ffmpeg -f image2 -i '/tmp/PHP_TMP_FILE' -f image2 -s 400x200 -

  Hopefully this will save someone the many hours it took me to figure this out...

• Python-FFMPEG Corruption Problems

  11 juillet 2023, par Gabriel Ruben Guzman

  I'm repurposing some python code to generate gifs/mp4s showcasing nba player movements dot form. (With the 'frames' used in the gifs being generated by matplotlib).

  


  The repo comes with two different functions for generating the gifs, watch_play and animate_play. Both of which use python command line functionalities to run ffmpeg and generate the mp4s.
I've been able to use the watch_play succesfully, bot every time I try using animate_play, which according to the documention is meant to be significantly faster than watch play, I run into the error showcased here.(I printed the cmd string being passed into the pipe, in the hopes it would make debugging easier)

  


  I've tried generating gifs/mp4s of various size and added a decent bit of code to lessen the volume of data being processed. (I'm essentially repurposing the code just to generate clips, so I've been able to remove a lot of the pbp/tracking data logs to speed up the run time) But no matter what I've done, gotten some variation of the screenshotted error.

  


  pipe: : corrupt input packet in stream 0&#xA;[rawvideo @ 0x55ccc0e2bb80] Invalid buffer size, packet size 691200 < expected frame_size 921600&#xA;Error while decoding stream #0:0 : Invalid argument

  &#xA;

  The code for animate_play

  &#xA;

  def animate_play(self, game_time=None, length=None, highlight_player=None,
                 commentary=True, show_spacing=None):
    """
    Method for animating plays in game.
    Outputs video file of play in {cwd}/temp.
    Individual frames are streamed directly to ffmpeg without writing them
    to the disk, which is a great speed improvement over watch_play

    Args:
        game_time (int): time in game to start video
            (seconds into the game).
            Currently game_time can also be an tuple of length two
            with (starting_frame, ending_frame)if you want to
            watch a play using frames instead of game time.
        length (int): length of play to watch (seconds)
        highlight_player (str): If not None, video will highlight
            the circle of the inputed player for easy tracking.
        commentary (bool): Whether to include play-by-play commentary in
            the animation
        show_spacing (str) in ['home', 'away']: show convex hull
            spacing of home or away team.
            If None, does not show spacing.

    Returns: an instance of self, and outputs video file of play
    """
    if type(game_time) == tuple:
        starting_frame = game_time[0]
        ending_frame = game_time[1]
    else:
        game_time= self.start +(self.quarter*720)
        end_time= self.end +(self.quarter*720)
        length = end_time-game_time
        # Get starting and ending frame from requested 
        # game_time and length
        print('hit')
        print(len(self.moments))
        print(game_time)
        print(end_time)
        print(length)
        print(game_time+length)
        
        print(self.moments.game_time.min())
        print(self.moments.game_time.max())

        sys.exit()
        starting_frame = self.moments[self.moments.game_time.round() ==
                                      game_time].index.values[0]
        ending_frame = self.moments[self.moments.game_time.round() ==
                                    game_time + length].index.values[0]

    # Make video of each frame
    filename = "./temp/{game_time}.mp4".format(game_time=game_time)
    if commentary:
        size = (960, 960)
    else:
        size = (480, 480)
    cmdstring = ('ffmpeg',
                 '-y', '-r', '20',  # fps
                 '-s', '%dx%d' % size,  # size of image string
                 '-pix_fmt', 'argb',  # Stream argb data from matplotlib
                 '-f', 'rawvideo','-i', '-',
                 '-vcodec', 'libx264', filename)
    #print(pipe)
    #print(cmdstring)
    
    

    # Stream plots to pipe
    pipe = Popen(cmdstring, stdin=PIPE)
    print(cmdstring)
    for frame in range(starting_frame, ending_frame):
        print(frame)
        self.plot_frame(frame, highlight_player=highlight_player,
                        commentary=commentary, show_spacing=show_spacing,
                        pipe=pipe)
    print(cmdstring)
    pipe.stdin.close()
    pipe.wait()
    return self


  &#xA;

  The code for watch play

  &#xA;

  def watch_play(self, game_time=None, length=None, highlight_player=None,
               commentary=True, show_spacing=None):

    """
    DEPRECIATED.  See animate_play() for similar (fastere) method

    Method for viewing plays in game.
    Outputs video file of play in {cwd}/temp

    Args:
        game_time (int): time in game to start video
            (seconds into the game).
            Currently game_time can also be an tuple of length
            two with (starting_frame, ending_frame) if you want
            to watch a play using frames instead of game time.
        length (int): length of play to watch (seconds)
        highlight_player (str): If not None, video will highlight
            the circle of the inputed player for easy tracking.
        commentary (bool): Whether to include play-by-play
            commentary underneath video
        show_spacing (str in ['home', 'away']): show convex hull
            of home or away team.
            if None, does not display any convex hull

    Returns: an instance of self, and outputs video file of play
    """
    print('hit this point ')
    warnings.warn(("watch_play is extremely slow. "
                   "Use animate_play for similar functionality, "
                   "but greater efficiency"))

    if type(game_time) == tuple:
        starting_frame = game_time[0]
        ending_frame = game_time[1]
    else:
        # Get starting and ending frame from requested game_time and length
        game_time= self.start +(self.quarter*720)
        end_time= self.end +(self.quarter*720)
        length = end_time-game_time


        starting_frame = self.moments[self.moments.game_time.round() ==
                                      game_time].index.values[0]
        ending_frame = self.moments[self.moments.game_time.round() ==
                                    game_time + length].index.values[0]
    #print(self.moments.head(2))
    #print(starting_frame)
    #print(ending_frame)
    print(len(self.moments))
    # Make video of each frame
    title = str(starting_frame)+'-'+str(ending_frame)
    for frame in range(starting_frame, ending_frame):
        print(frame)
        self.plot_frame(frame, highlight_player=highlight_player,
                        commentary=commentary, show_spacing=show_spacing)
    command = ('ffmpeg -framerate 20 -start_number {starting_frame} '
               '-i %d.png -c:v libx264 -r 30 -pix_fmt yuv420p -vf '
               '"scale=trunc(iw/2)*2:trunc(ih/2)*2" {title}'
               '.mp4').format(starting_frame=starting_frame,title=title)
    os.chdir('temp')
    os.system(command)
    os.chdir('..')

    # Delete images
    for file in os.listdir('./temp'):
        if os.path.splitext(file)[1] == '.png':
            os.remove('./temp/{file}'.format(file=file))

    return self'


  &#xA;

• How to send time stamps to ffmpeg when encoding uncompressed video frames via stdin ?

  7 août 2023, par Spacy

  I'm writing a C# application, but this question applies to any programming language.&#xA;I know it is possible to pass uncompressed video frames (in yuv420p format) via stdin to ffmpeg.exe, but I recorded these frames to RAM from a webcam that has a variable frame rate. I have the exact time stamps for each frame. How do I send the time stamps to ffmpeg.exe together with the uncompressed frame data ?

  &#xA;

  I would prefer if it was possible to send them within the stdin byte stream, but I could also provide them up front when invoking ffmpeg.exe (this might become a very long argument list though). I could also write them to a text file on disk if nothing else works.

  &#xA;