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• How to increase my sever ability to run ffmpeg command faster and then execute my php code

  9 janvier 2018, par Femzy

  Hello I have a problem with the ffmpeg command, when i tried to use a text file that has plenty of words like more than 300 words, it generate the video but also the rest of my code did not executed, i wanted to save the path of the generated video to the database after it is created and then move to the next page but the server stop after it execute the command and not run the rest of the code.
  Also i tried to use "text" only and pass the string to the Text intead of "textfile" but I Got the Below error

  Error reinitializing filters!
  
  Failed to inject frame into filter network: Invalid argument
  
  Error while processing the decoded data for stream #0:0
  
  [AVIOContext @ 0x329ca80] Statistics: 0 seeks, 0 writeouts
  
  [AVIOContext @ 0x3293680] Statistics: 32768 bytes read, 0 seeks
  
  Conversion failed!

  Please i want to know which one is the best practice either to use "text" or "textfile" and how i can use them to not having any error.. Thanks For helping me in advance
  This is my PHP codes that includes the ffmpeg commands

  $cmds ='ffmpeg -loop 1 -i '.$image_file.' -vf scale=-2:1080,drawtext="text='.$directory.':expansion=normal:fontfile=FreeSerif.otf: y=h-line_h-20:x=-100*t: fontcolor=white: fontsize=50" -pix_fmt yuv420p -t '.$words_count.' -movflags +faststart '.$file_dir.' -report';
  
                                  echo shell_exec($cmds);
  
                                  $video_files = array(
  
                                          'user_id' => $_SESSION['user_id'],
  
                                          'text_file_id' => $user_id,
  
                                          'video_file' => $file_name,
  
                                          'created' => time()
  
                                  );
  
                                  if($user->insert('db_table', $video_files)){
  
                                          if (file_exists($file_dir)) {
  
                                              $_SESSION['d_file'] = $file_dir;
  
                                              $msg['success'] = "Success";
  
                                          } else {
  
                                              $msg['error'] = "Sorry the file was not created";
  
                                          }                                                
  
                                  }else{
  
                                          $msg['error'] = "Sorry there was database error";
  
                                  }

• Encoding 4K 60Hz lossless from a capture card

  13 décembre 2017, par Alex Pizzi

  Windows 10 64-bit
  Ryzen 7
  GTX 1080
  32GB RAM

  Hi all,

  I’m trying to encode 4K 30/60Hz video in a lossless format from a 4K capture card and everything I’ve tried gives me a similar error as in the linked image, [real-time buffer too full or near too full frame dropped]

  [Not mine]
  https://cloud.githubusercontent.com/assets/4932401/22171307/ef5c9864-df58-11e6-8821-4b74ce3f32d0.png

  This is the command I’ve tried most recently :

  ffmpeg.exe -f dshow -video_size 3840x2160 -framerate 30 -pixel_format bgr24 -rtbufsize INT_MAX -i video="MZ0380 PCI, Analog 01 Capture" -vf fps=30 out%d.BMP

  With the images dumped to a 10G RAM disk or 850 EVO. I’m doing this to skip the encoding step.

  I get the same error when encoding with h265 lossless and NVENC h265 lossless.

  I need the video to be lossless as it will be used to test hardware h265 encoders.

  Video source is a 4K Blu-ray.

  Any help would be greatly appreciated. Thank you.

  -Alex P

• No such file or directory when running an ffmpeg command from script

  23 novembre 2017, par A_Matar

  I have been trying to run this ffmpeg command from python script to generate video of certain length from a static image but I keep getting No such file or directory error !
  Here is my code :

  import subprocess
  
  
  
  def generate_white_vid (duration):
  
      ffmpeg_create_vid_from_static_img = 'ffmpeg -loop 1 -i /same_path/WhiteBackground.jpg -c:v libx264 -t %f -pix_fmt yuv420p -vf scale=1920:1080 /same_path/white_vid2.mp4' % duration
  
      print ffmpeg_create_vid_from_static_img
  
      pp = subprocess.Popen(ffmpeg_create_vid_from_static_img)
  
      pp.communicate()
  
  
  
  generate_white_vid(0.5)

  However when I run the same exact command :

  ffmpeg -loop 1 -i /same_path/WhiteBackground.jpg -t 0.500000 -pix_fmt yuv420p -vf scale=1920:1080 /same_path/white_vid2.mp4

  from the cli, it works just fine. Where am I missing up ?
  Here is the full trace :

  Traceback (most recent call last):
  
    File "gen.py", line 10, in <module>
  
      generate_white_vid(0.5)
  
    File "gen.py", line 7, in generate_white_vid
  
      pp = subprocess.Popen(ffmpeg_create_vid_from_static_img)
  
    File "/home/ubuntu/anaconda2/lib/python2.7/subprocess.py", line 390, in __init__
  
      errread, errwrite)
  
    File "/home/ubuntu/anaconda2/lib/python2.7/subprocess.py", line 1024, in _execute_child
  
      raise child_exception
  
  OSError: [Errno 2] No such file or directory
  
  </module>

  When I use a list to pass the ffmpeg commands parameters as following ffmpeg_create_vid_from_static_img = ['ffmpeg', '-loop', '1', '-i', '/same_path/WhiteBackground.jpg', '-c:v', 'libx264', '-t', duration, '-pix_fmt', 'yuv420p', '-vf', 'scale=1920:1080', '/same_path/white_vid.mp4'] , I get a type error :

  TypeError                                 Traceback (most recent call last)
  
   in <module>()
  
  ----> 1 generate_white_vid(0.5)
  
  
  
   in generate_white_vid(duration)
  
        3     ffmpeg_create_vid_from_static_img = ['ffmpeg', '-loop', '1', '-i', '/home/ubuntu/matar/multispectral/WhiteBackground.jpg', '-c:v', 'libx264', '-t', duration, '-pix_fmt yuv420p', '-vf', 'scale=1920:1080', '/home/ubuntu/matar/multispectral/white_vid.mp4']
  
        4     print ffmpeg_create_vid_from_static_img
  
  ----> 5     pp = subprocess.Popen(ffmpeg_create_vid_from_static_img)
  
        6     pp.communicate()
  
  
  
  /home/ubuntu/anaconda2/lib/python2.7/subprocess.pyc in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags)
  
      388                                 p2cread, p2cwrite,
  
      389                                 c2pread, c2pwrite,
  
  --> 390                                 errread, errwrite)
  
      391         except Exception:
  
      392             # Preserve original exception in case os.close raises.
  
  
  
  /home/ubuntu/anaconda2/lib/python2.7/subprocess.pyc in _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, to_close, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
  
     1022                         raise
  
     1023                 child_exception = pickle.loads(data)
  
  -> 1024                 raise child_exception
  
     1025 
  
     1026 
  
  
  
  TypeError: execv() arg 2 must contain only strings
  
  </module>