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• FFmpeg : do not terminate script using loop

  4 novembre 2019, par Punit Gajjar

  I have a collection of a few video URLs, and what I am trying to do is add a watermark to all the videos using a for loop, in a laravel

  inside the loop, this is my FFmpeg code.

  shell_exec('ffmpeg -y -i MY_VIDEO_PATH_HERE -i WATER_MARK_IMAGE_URL -filter_complex "overlay=18:H-h-30" -strict -2 -codec:a copy "MY_PATH_TO_STORE_VIDEO"');

  All this code is done using a queue/job from the laravel.

  My Problem is, If the above command is getting failed and not able to add the watermark

  it does not move the next video to start adding the watermark, instead of it terminate the process and try to add the watermark again for the same video.

  What I want is loop should continue for the next video instead of terminating the script.

  Any solution ?

• How can I create video thumbnails in different Folders in ffmpeg ?

  1er janvier 2020, par termnlencodes

  I’m trying to generate video thumbnails for all my video collection using ffmpeg. Downside is, I don’t know how to create them in they’re respective folders.

  Example : Videos are in the following folders ;

  C :/Media/TV Show/<showname></showname>/<seasonnum></seasonnum>/

  C :/Media/Movies/<moviename></moviename>/

  I want to generate the thumbnails under and folders.

  Here’s the script I’m using rn and I don’t know what to add on it.

  Hope somebody can help me.
  Edit : Whenever I create the thumbnails there’s a ".1" after the file extension. How can I remove it ?

• Input seeking for frame at specified timestamp with Py-AV

  9 décembre 2019, par neonScarecrow

  I have a project already using Py-AV and am trying to replicate a specific ffmpeg command. The goal is to get a frame roughly around the specified timestamp.

  Here’s the ffmpeg commmand :
  https://trac.ffmpeg.org/wiki/Seeking

  ffmpeg -ss 14 -i https://some_url.mp4 -frames:v 1 frame_at_14_seconds.jpg

  Here’s my code :

      #return one frame around 14 seconds into the movie
  
      target_sec = 14 
  
      container = av.open('https://some_url.mp4', 'r')
  
      container.streams.video[0].thread_type = 'AUTO'
  
      video_stream = next(s for s in container.streams if s.type == 'video')
  
      time_base = float(video_stream.time_base)
  
      target_timestamp = int(target_sec / time_base) + video_stream.start_time
  
      video_stream.seek(target_timestamp)
  
      for frame in container.decode(video_stream):
  
          frame.to_image().save('frame_at_14_seconds.jpg')
  
          break

  Additionally, I have found any documentation about this, but does anyone know if either command (ffmpeg/av.open) is downloading the entire file to a tmp file behind the scenes. I’m looking for a less memory-intensive way to read a frame for every second in an up to 60 second video.