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• ffmpeg+php Add Music to video

  19 septembre 2013, par user2792392

  Dear Sir i create this code for simple video convert from one to another.
  i want to add more feature like
  ffmpeg+php Add Music to video

  how to do it ??
  convert request to begin encoding the video, and status request that retrieves
  * the current encoding status so the progress bar can be updated.
  *
  * The $outfile variable should be changed to an input value, but is set this way
  * for now for testing purposes.
  *
  * @ver 0.1
  */
  require 'config.php' ;
  require 'functions.php' ;

  //<<-- CHECK FOR ERRORS -->>//
  
  $type       = _chkVal('type', '');
  
  $fkey       = _chkVal('fkey', '');
  
  $infile     = _chkVal('filename', '');
  
  $outfile    = 'testing.mp4';
  
  $params     = _chkVal('params', '');
  
  
  
  // Check Request Type
  
  $validTypes = array('convert', 'status');
  
  
  
  if( !in_array($type, $validTypes) )
  
      json_response(array('fkey' => $fkey, 'msg' => 'Invalid process type!'), true);
  
  
  
  // $fkey will always be 8 characters.
  
  // It's created with PHP's hash() function using 'crc32' algorithm in index.php
  
  if( strlen($fkey) != 8 )
  
      json_response(array_merge(array('fkey' => '', 'msg' => 'Invalid fkey given!')), true);
  
  
  
  // Filename should be at least 5 (1 character + 4 character extension. EX : i.mp4)
  
  if( $type == 'convert' && ( strlen($infile) < 5) )
  
      json_response(array('fkey' => $fkey, 'msg' => 'Invalid input filename given!'), true);
  
  
  
  // Filename should be at least 5 (1 character + 4 character extension. EX : i.mp4)
  
  if( $type == 'convert' && ( strlen($outfile) < 5) )
  
      json_response(array('fkey' => $fkey, 'msg' => 'Invalid output filename given!'), true);
  
  
  
  if( $type == 'convert' && (strlen($params) < 1) )
  
      json_response(array('fkey' => $fkey, 'msg' => 'Invalid parameters given!'), true);
  
  
  
  //<<-- END OF ERROR CHECK -->>//
  
  
  
  
  
  $ffmpegConvert = new ffmpegConvert($fkey);
  
  
  
  
  
  //<<-- PROCESS REQUEST -->>//
  
  
  
  // Start the video conversion
  
  if( $type == 'convert' )
  
  {
  
      $ffmpegConvert->exec( $infile, $outfile, $params, $fkey );
  
      // Add 2 second delay to give the server time to start writing the status log,
  
      // otherwise $ffmpegConvert->jsonStatus() will trigger an error...
  
      sleep(2);
  
      $ffmpegConvert->jsonStatus();
  
  }
  
  
  
  // Check on video conversion progress
  
  if( $_POST['type'] == 'status' )
  
  {
  
      $ffmpegConvert->jsonStatus();
  
  }
  
  
  
  //<<-- END OF PROCESS REQUEST -->>//
  
  
  
  // Shouldn't get to this, but if so, let's send a message for debugging reasons....
  
  json_response(array('msg' => 'Unhandled request type!'), true);

• Converting ffmpeg loudnorm first pass dcf summary report output to data.frame R

  23 décembre 2022, par Chris

  Following from operations on a video with ffmpeg, a loudnorm first pass report for purely audio files is produced

  


  names(aud_proc_df)
[1] "in_files" "proc_out" "filter"

cmds_loudness_report <- with(aud_proc_df, sprintf("ffmpeg -hide_banner -i %s -af loudnorm=I=-23:TP=-2:LRA=7:print_format=summary -f null /dev/null 2>&1 | tail -n 12 >> loudness_rpt_all.txt", in_files)) # linux specific notation
lapply(cmds_loudness_report, system)


  


  reading this as a .csv rather than .dcf

  


  loudness_df_csv <- read.csv('loudness_rpt_all.txt', header = FALSE, sep =':')
head(loudness_df_csv)
                 V1                  V2
1  Input Integrated          -24.7 LUFS
2   Input True Peak           -1.6 dBTP
3         Input LRA             17.9 LU
4   Input Threshold          -37.8 LUFS
5 Output Integrated          -23.4 LUFS
6  Output True Peak           -2.0 dBTP
#data
structure(list(V1 = c("Input Integrated", "Input True Peak", 
"Input LRA", "Input Threshold", "Output Integrated", "Output True Peak", 
"Output LRA", "Output Threshold", "Normalization Type", "Target Offset", 
"Input Integrated", "Input True Peak", "Input LRA", "Input Threshold", 
"Output Integrated", "Output True Peak", "Output LRA", "Output Threshold", 
"Normalization Type", "Target Offset"), V2 = c("    -24.7 LUFS", 
"      -1.6 dBTP", "            17.9 LU", "     -37.8 LUFS", 
"   -23.4 LUFS", "     -2.0 dBTP", "           14.8 LU", "    -36.2 LUFS", 
"   Dynamic", "        +0.4 LU", "    -23.9 LUFS", "      +0.2 dBTP", 
"            22.0 LU", "     -37.6 LUFS", "   -23.6 LUFS", "     -2.0 dBTP", 
"           21.9 LU", "    -37.0 LUFS", "   Dynamic", "        +0.6 LU"
)), row.names = c(NA, 20L), class = "data.frame")


  


  then, for column notation portability between win and linux systems

  


  df_names <- unique(loudness_df_csv$V1)
df_names2 <- gsub(' ', '_', df_names)


  


  and then make a data.frame

  


  loudnorm_rpt <- data.frame(loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[1])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[2])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[3])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[4])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[5])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[6])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[7])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[8])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[9])], loudness_df_csv$V2[which(loudness_df_csv$V1 == df_names[10])])
names(loudnorm_rpt) <- df_names2
rownames(loudnorm_rpt) <- c('A', 'B')


  


  Should I just wrap this in a function or is there a dcf to data.frame function that I've missed ?

  


• pyav / ffmpeg / libav select number of P-frames and B-frames

  27 mai 2021, par user1315621

  I am streaming from an rtsp source. It looks like half of the frames received are key frames. Is there a way to reduce this percentage and have an higher number of P-frames and B-frames ? If possible, I would like to increase the number of P-frames (not the one of B-frames).
I am using pyav which is a Python wrapper for libav (ffmpeg)

  


  Code :

  


  container = av.open(
    url, 'r',
    options={
        'rtsp_transport': 'tcp',
        'stimeout': '5000000',
        'max_delay': '5000000',
    }
)
stream = container.streams.video[0]
codec_context = stream.codec_context
codec_context.export_mvs = True
codec_context.gop_size = 25  

for packet in self.container.demux(video=0):
    for video_frame in packet.decode():
        print(video_frame.is_key_frame)


  


  Output :

  


  True
False
True
False
...


  


  Note 1 : I can't edit the source. I can just edit the code used to stream the video.

  


  Note 2 : same solution should apply to pyav, libavi and ffmpeg.

  


  Edit : it seems that B-frames are disabled : codec_context.has_b_frames is False