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• PHP : ffmpeg joining videos

  16 août 2012, par ime.devdesks

  I use the following code for joining two flv files into one flv file (output.flv), i use this reference for joining...

  $a1 = 'Test1.flv';
  
  $a2 = 'Test2.flv';
  
  
  
  $b1 = $temp_vid_dir.'aaa1.mpg';
  
  $b2 = $temp_vid_dir.'bbb1.mpg';
  
  $b3 = $temp_vid_dir.'cccc_all.mpg';
  
  $b4 = $temp_vid_dir.'output.flv';
  
  
  
  
  
  $cmd = $ffmpeg ." -i ".$a1." -qscale:v 1 " . $b1 ." 2>&1";
  
  exec($cmd, $out, $var);
  
  
  
  $cmd = "$ffmpeg -i ". $a2 ." -qscale:v 1 ". $b2 ." 2>&1";
  
  exec($cmd, $out, $var);
  
  
  
  $cmd = $ffmpeg ." -i concat:'$b1|$b2' -c copy $b3 2>&1";
  
  exec($cmd, $out, $var);
  
  
  
  $cmd = "$ffmpeg -i $b3 -qscale:v 2 $b4";
  
  exec($cmd, $out, $var);

  but it gives me error on first command

  ffmpeg : unrecognized option 'qscale:v'

  then when i remove the ":v" from command its ok, and create the ".mpg" file, but then it doest not go further. And give me below error on third command :

  'bbb1.mpg'' is not recognized as an internal or external command,

  I am now stuck here and don't know how to execute ffmpeg command for joining videos, any help will be highly appreciated.

• avcodec/nvdec : Make vp8 initialisation more 'compatible'

  27 novembre 2017, par Philip Langdale

  avcodec/nvdec : Make vp8 initialisation more 'compatible'
  Ancient versions of gcc (pre 4.6) can't directly initialise
  
  members of anonymous inner unions/structs by name.
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10676
  Unfortunately, RHEL 6 shipped with one of these ancient
  
  versions and so we're stuck with it until approximately the
  
  heat death of the universe.
  Putting explicit braces into the initialisation is possibly a
  
  work-around but the behaviour there was never fully understood
  
  before direct initialisation was made to work.
  So, this may or may not work.
  

  • [DH] libavcodec/nvdec_vp8.c

• FFMPEG Encryption failed

  20 décembre 2019, par Ale

  I’m a newbie and I’m trying to encrypt an HLS file with FFmpeg. i’ve already installed FFmpeg and Openssl.
  First I created the key with : openssl rand 16 > enc.key
  Then I generated an IV with : openssl rand -hex 16
  After that, I wrote a key info file with my Notepad to point FFMpeg (-hls_key_info_file). It has the following format :

  Key URI

  Path to key file

  IV (optional)

  Eg :

  http://example.com/enc.key

  C :\Users\enc.key

  IV Number

  And I save this file in the same folder as the enc.key file.

  Then i run this command :

  ffmpeg -y \
  
      -i sample.mov \
  
      -hls_time 9 \
  
      -hls_key_info_file enc.keyinfo
  
      -hls_playlist_type vod \
  
      -hls_segment_filename "fileSequence%d.ts" \
  
      prog_index.m3u8

  But I keep getting the following error :

  error opening key info file enc.keyinfo. Could not write header for output file #0 (incorrect codec parameters ?) : No such file or directory. Error initializing output stream 0:1 — [aac @ 0000000002f900c0] Qavg : nan Conversion failed !

  I’m stuck, and I don’t know what I’m doing wrong.
  Thanks