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• How can i use ffmpeg to add voice note to another mp3 at specific time , let everything play without reducing the original mp3

  29 juin 2020, par Adike maduabuchi

  I have used some code which does not give me what I want, I used PHP shell to execute the code

  


               $var = 'ffmpeg -y -i ' . $voice_note_tag . ' -i ' . $original_music_path . '  -filter_complex "[0]asplit[a][b]; [a]atrim=duration=' . $time_come_vioce . ',volume=\'1-max(0*(t-1),0)\':eval=frame[pre];  [b]atrim=start=' . $time_come_vioce . ',asetpts=PTS-STARTPTS[song];  [song][1]amix=inputs=2:duration=first:dropout_transition=2[post]; [pre][post]concat=n=2:v=0:a=1[mixed]"  -map "[mixed]" ' . $output . ' 2>&1';
                            shell_exec($var);


  


• get screenshot from video using ffmpeg

  6 mars 2016, par LocNguyen

  I’m building a Wordpress site that allow admin to upload and attach a video clip to a post. After the video was uploaded successfully, I use ffmpeg to get a screenshot from that video, and that screenshot would be the post featured image.

  In my case, the screenshot was generated successfully. In next step, I use Wordpress function media_sideload_image() to copy that screenshot to WP ’uploads’ folder and make that image as post featured image.

  But for some reasons, the media_sideload_image() returned a WP_Error : http_404. I have checked the url of the temporary screenshot image, but it was valid and display a screenshot nicely.

  In this case, I guess that the media_sideload_image() was called after the ffmpeg command, but at that time, the ffmpeg process has not completely finished so the media_sideload_image() encountered http_404 error.

  So the question is : Is there any way to make sure the screenshot was saved completely before running media_sideload_image() function after that, to avoid http_404 error ?

  Thank you very much !

• Unknown Decoder in ffmpeg

  17 mars 2020, par user6782547

  I have a script, that is called from Plex after the recording of a movie. This script just crops the black borders of the movie.

  When I call it directly from the command line, it works flawlessly. But when Plex calls it, it says : "Unknown decoder", even if I call it with the key word "auto" for the decoder.

  There’s another problem, that might give a hint to solve my problem. It also says : "WARNING: library configuration mismatch". (Only when being called from Plex.) This is probably, because I compile ffmpeg from the Debian source package (so that I can add the whole CUDA functionality).
  I had a look at the dynamic linker path, but it is empty on the command line.

  What is so different, when this command is called from Plex, than when I call it manually from the command line ?

  Thanks for any help