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• Checking Video Quality using WP Code, Forminator and FFmpeg is not working [closed]

  3 septembre 2024, par guiliannkamga Guilian90

  I have a WordPress website where users should be able to upload videos. The quality of the videos should be checked upon upload, meaning the videos must have a 16:9 aspect ratio and be in HD. If a video does not meet these conditions, the upload should not be allowed, and the user should be informed of the reason.

  


  I am using the WordPress plugin Forminator for the video upload form and WP Code with a code snippet that contains PHP code. FFmpeg version 4.4.2 is installed on my server.

  


  ffmpeg version

  


  Form to upload a Video

  


  My provider is DreamHost, and I can connect to the server via Terminal on my MacBook and run ffmpeg commands without any issues.

  


  I added the form to a page and when I upload invalid videos, unfortunately, I do not receive any error messages, which should be happening according to my code, and I do not know why.

  


  Uploading the Video

  


  Success Message after uploading the Video

  


  Can someone help me ?

  


  add_filter('forminator_custom_form_submit_before_set_fields', 'forminator_video_validation', 10, 3);

function forminator_video_validation($entry, $form_id, $field_data) {
    foreach ($field_data as $field) {
        if ($field['name'] === 'upload-1') { // 'upload-1' is the ID of the Datei-Upload-Field in Forminator
            $file = $field['value']['file']['file_path'];

            // check if the file exists
            if (!file_exists($file)) {
                wp_die('File does not exist');
            }

            // ffmpeg command to check video size and resolution
            $command = "ffmpeg -i " . escapeshellarg($file) . " 2>&1";
            $output = shell_exec($command);

            // extract resoltion from the ffmpeg output
            if (preg_match('/Stream #0:0.*Video:.* (\d+)x(\d+)/', $output, $matches)) {
                $width = (int) $matches[1];
                $height = (int) $matches[2];
                $aspect_ratio = $width / $height;
                $allowed_aspect_ratio = 16 / 9;
                $min_width = 1280;
                $min_height = 720;

                // check if the video fullfills the criterias
                if ($width < $min_width || $height < $min_height || round($aspect_ratio, 2) != round($allowed_aspect_ratio, 2)) {
                    wp_die('The video must be at least in HD (1280x720) and must have the format 16:9. (Found: ' . $width . 'x' . $height . ')');
                }
            } else {
                // If the video could not be analysed
                wp_die('The Video could not be analysed');
            }
        }
    }
}


  


  PHP Code Snippet in WPCode

  


  WPCode Settings

  


• ffmpeg -concat slowing down AAC audio files

  28 août 2014, par Marc

  I am concatenating six m4a files with this command

  ffmpeg -f concat -i audiofiles.txt -c copy all_audio_edited.m4a

  each file has a duration of 6 hours (24 in total) but the concatenation doesn’t work quite well : the first part of the file (the first m4a) is perfect, but all the others are slowed down, so the final duration is >26 hours

  What’s wrong ?

  Thanks

  Marcs-MacBook-Pro:Sof marc$ ffmpeg -report -f concat -i audiofiles.txt -c copy all_audio_edited.m4a
  
  ffmpeg started on 2014-08-28 at 23:35:06
  
  Report written to "ffmpeg-20140828-233506.log"
  
  ffmpeg version 2.3 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Aug 26 2014 17:59:15 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-aacenc --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-openssl --enable-libopus --enable-frei0r --enable-libcaca --enable-libquvi --enable-libvidstab --enable-libx265 --enable-libopenjpeg --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 '
  
    libavutil      52. 92.100 / 52. 92.100
  
    libavcodec     55. 69.100 / 55. 69.100
  
    libavformat    55. 48.100 / 55. 48.100
  
    libavdevice    55. 13.102 / 55. 13.102
  
    libavfilter     4. 11.100 /  4. 11.100
  
    libavresample   1.  3.  0 /  1.  3.  0
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 19.100 /  0. 19.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [concat @ 0x7fcb6c803400] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, concat, from 'audiofiles.txt':
  
    Duration: 00:00:00.00, start: 0.000000, bitrate: 279 kb/s
  
      Stream #0:0: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 280 kb/s
  
  Output #0, ipod, to 'all_audio_edited.m4a':
  
    Metadata:
  
      encoder         : Lavf55.48.100
  
      Stream #0:0: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, 280 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  size= 3020597kB time=26:07:14.44 bitrate= 263.1kbits/s    
  
  video:0kB audio:3004946kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.520849%

• Decoding the h.264 stream from a COM port

  18 mars, par Peter

  I would like to know if there is a reliable way to decode an H.264 NAL stream coming through a serial port using software.

  


  So far, I have managed to decode a single frame using a python script. In this script, I first write the incoming data to a file, and when the end-of-frame marker 00_00_00_01 appears, I display the frame using ffplay.

  


  import serial
import subprocess
import os
import time

ser = serial.Serial('COM3', 115200, timeout=1)
output_file = "output.264"

# Variable to store the ffplay process
ffplay_process = None

# Open the file for writing in binary mode
with open(output_file, "wb") as file:

    print("Writing bytes to output.264. Waiting for the end-of-frame marker 0x00000001.")

    buffer = bytearray()
    marker = b'\x00\x00\x00\x01'

    try:
        while True:
            if ser.in_waiting:  # If there is data in the buffer
                data = ser.read(ser.in_waiting)  # Read all available bytes
                buffer.extend(data)

                # Check if the end-of-frame marker is in the buffer
                while marker in buffer:
                    index = buffer.index(marker) + len(marker)  # Position after the marker
                    frame = buffer[:index]  # Extract the frame
                    buffer = buffer[index:]  # Keep the remaining data

                    print(f"Frame recorded: {len(frame)} bytes")
                    file.write(frame)  # Write the frame to the file
                    file.flush()  # Force writing to disk

                    # Close the ffplay window if it is already open
                    if ffplay_process and ffplay_process.poll() is None:
                        ffplay_process.terminate()
                        ffplay_process.wait()  # Wait for the process to terminate

                    # Play the recorded frame, reopening the window
                    ffplay_process = subprocess.Popen(["ffplay", "-f", "h264", "-i", output_file])

    except KeyboardInterrupt:
        print("\nRecording stopped.")
    finally:
        # Close the serial port and the ffplay process
        ser.close()


  


  However, each time a new end-of-frame marker is detected, the ffplay window closes and reopens to show the next frame. It will flicker when transferring the video. Is there a way to display the frames in the same window for seamless playback when streaming video ?

  


  Or is there a better approach or software that is more suited for this task ? I do not know where to start, so I will be glad for any hints.