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• FFMPEG how to use https dynamic url as input for amovie filter

  2 juillet 2020, par Johny Sharma

  Basically what i am trying to do is to calling a dynamic php url which is generating a audio file for me and just want to use that file as an input for amovie filter.
I hope you have understand my question.

  


  What i have done so far ?

  


  I have a FFMPEG code which is :

  


  ffmpeg-y -i 'bg-file.mp3' -c copy -map 0:0 -map 1:0 -filter_complex "amovie='/auth.php?input=string&l=hi&f.mp3':loop=999[sc][mix];[0:a][sc]sidechaincompress=threshold=0.100:ratio=20,volume=10dB:precision=fixed[bg], [bg][mix]amix=duration=first"  -c:a libmp3lame -ac 2  "save.mp3"


  


  This line is calling my dynamic url for generating the required song.

  


  "amovie='/auth.php?input=string&l=hi&f.mp3'


  


  Everything is working if i check them apart. but when i use them together the ffmpeg is giving the following error.

  


  [22] => [Parsed_amovie_0 @ 0x1378140] Failed to avformat_open_input '/auth.php?input=string&l=hi&f.mp3':loop=999'
[23] => [AVFilterGraph @ 0x1368ca0] Error initializing filter 'amovie' with args '/auth.php?input=string&l=hi&f.mp3':loop=999'
[24] => Error initializing complex filters.
[25] => No such file or directory


  


  I dont know is it possible to put a dynamically generated url as an input for amovie filter or not ?
if i open my dynamic url in browser its works like a mp3 file and play similar to any mp3 file.

  


  using this code to play that mp3 :

  


  header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($path));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
ob_clean();
flush();
readfile($path);
exit;


  


  This one looks similar to my query but slightly different and that's why i am still looking for a solution

  


  How to use https input with ffmpeg "amovie" filter ?

  


• OpenCV3 returning float FRAME_COUNT

  15 mars 2016, par mprat

  I am using OpenCV3 on OSX with Python 2.7 bindings. However, when I try to read the frame count of my video (a .mp4 video), it returns a float - I am expecting an int. Do I need to compile OpenCV3 with some special flags ? Am I missing some codecs ?

  import cv2
  
  vid = cv2.VideoCapture("vid.mp4")
  
  print vid.get(cv2.CAP_PROP_FRAME_WIDTH)

  And it returns a float.

  Installation details :

  • ffmpeg : brew install ffmpeg --with-dcadec --with-openh264 --with-openjpeg --with-openssl --with-tools --with-x265  --with-zimg --with-libvidstab --with-libvpx
  • opencv3 : brew install opencv3 --with-ffmpeg --with-contrib

• Update docs.

  10 septembre 2013, par XhmikosR

  Update docs.
  Use code syntax in more places and link to jquery.