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• how to create a thumbnail, at the time of video upload ? [php / codeigniter]

  19 mai 2016, par Amol Phad sudhakar

  I am trying to create a thumbnail for my uploading video. searching for easiest way to generate thumbnail at the time of video upload itself. i think if some provide the code without using ffmpeg will be life saving for me. because i’m running my code on windows wamp or any other alternative welcomed too thank you.

  my real code is in CodeIgniter, not able to figure out how to do it.

  $postname = $this->input->post('post-name');
  
  
  
              $configVideo['upload_path'] = './video';
  
              $configVideo['max_size'] = '1000000024';
  
              $configVideo['allowed_types'] = 'avi|flv|wmv|mp4';
  
              $configVideo['overwrite'] = TRUE;
  
              $configVideo['remove_spaces'] = TRUE;
  
              $ext = get_mime_by_extension($_FILES['video']['name']);
  
              $video_name = str_replace(' ', '_', $postname);
  
              $configVideo['file_name'] = $video_name;
  
  
  
              $this->load->library('upload', $configVideo);
  
              $this->upload->initialize($configVideo);
  
  
  
              if (!$this->upload->do_upload('video')) {
  
  
  
                  $msg = $this->upload->display_errors();
  
                  $this->session->set_flashdata('error', $msg);
  
  
  
  
  
              } else {
  
                  $videoDetails = $this->upload->data(); 

• Batch file to perform multiple conversions in a row

  16 septembre 2020, par ben158

  I'm trying to write a batch file that can be launched from Handbrake GUI with the "send file to" feature, that will split an MKV into chapters with MKVmerge, then convert all those new files into mp4s with ffmpeg. Handbrake passes only one argument into the batch file, the full file path of the output (surrounded by quotes). I'm very new to batch scripting and am having difficulty getting it all to work together — all the individual parts work just fine when absolute paths are given. Here's the content of the .bat file :

  


  START /WAIT "C:\Program Files\MKVToolNix\mkvmerge.exe -o output.mkv --split chapters:all %1"
for %%i in (*.mkv) do C:\ffmpeg\bin\ffmpeg.exe -i "%%i" -loop 1 -i "%%~dpi"\folder.jpg -map 1:v -map 0:a -c:a ac3 -b:a 640K -pix_fmt yuv420p -c:v libx264 -shortest -fflags +shortest -max_interleave_delta 100M "%%~ni.mp4"


  


  Any glaring mistakes I'm making ? I've been at this for hours reading SO threads and documentation, and can't figure it out for the life of me. Any help is appreciated, thanks in advance.

  


• Font size messes up when I try to hardsub

  7 septembre 2020, par かかし９０００

  I have used the following command for a hardsub and everything worked but the subtitle size increased :

  


  ffmpeg -vsync 0 -i input.mkv -vf "ass=subs.ass" -c:a copy -c:v h264_nvenc -b:v 700k final.mp4


  


  i used a srt type file before using ass but that command made the text size take up almost half the screen and the force_style filter shows it executed properly but there was no change in text size at all

  


  though the ass sub style gets me a proper subtitle size i'd very much like it if the size was appropriate