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• Insert Video Clip in another Video using ffmpeg

  22 avril 2014, par ZafarYousafi

  I want to insert a video clip in another video at specified position (after n seconds). I am thinking to slice the main video first and then concatenate the pieces again. But this solution is not looking promising to me as what if I have to insert the video clips at multiple locations in the main video ? Is there any better way of doing this in ffmpeg ?
  thanks

• How to extract video clip from larger video based on specific time and duration

  26 juillet 2022, par user19019404

  I have video clips that get created. Each video is recorded for 5 minutes and starts at a time e.g. 10:01:20 to 10:06:19 then the next video from 10:06:20 etc. These videos are recorded at a specific frame rate, be it 5 frames or 30 frames (its dependent on the platform making the recording). The net result is NOT a 5 minute video clip but might be a 2 minute video clip (where everyone moves very quickly in the view as a result of the frame rates). I cannot restrict a 1 to 1 recording as these are generated by external systems.

  


  I need to extract specific portions out of the video. For example I need to extract from 10:03:10 to 10:03:35 (25 seconds). This would equate to 10 seconds into the video up to 14 seconds into the video, in those 4 seconds of video, 25 real world seconds are displayed.

  


  My question is do you have any guidance as to how I can calculate that each second of recording actually means 10 or 12 seconds in real life, therefore go to this frame and record to this frame for example.

  


  I have been looking at cv2.CAP_PROP_FPS to get the video frame rates, CAP_PROP_POS_MSEC and CAP_PROP_FRAME_COUNT and believe the answer might lie there, but not sure.

  


  The thinking being if I work out the frame rate of the video, the total frames then I can divide the one by the other to get to how many frames make up real world seconds (this is where I fail). This way I can run from frame to frame as a result.

  


  Thank you

  


• Using ffmpeg output to HLS and Image Stills

  27 novembre 2018, par yomateo

  I want to combine the output from an RTSP stream into both an HLS stream and several image stills. I can do this fine separately (obviously) but i’m having trouble combining things. Can I get a quick hand ?

  Here are my outputs (that works) :

  Outputting HLS streams :

  ffmpeg -rtsp_transport tcp -i '$RTSP_URL'
  
      -c:v copy -b:v 64K -f flv rtmp://localhost/hls/stream_low \
  
      -c:v copy -b:v 512K -f flv rtmp://localhost/hls/stream_high

  Outputting image stills :

  ffmpeg -hide_banner -i '$(RTSP_URL)' -y  \
  
      -vframes 1 -vf "scale=1920:-1" -q:v 10 out/screenshot_1920x1080.jpeg \
  
      -vframes 1 -vf "scale=640:-1" -q:v 10 out/screenshot_640x360.jpeg \
  
      -vframes 1 -vf "scale=384:-1" -q:v 10 out/screenshot_384x216.jpeg \
  
      -vframes 1 -vf "scale=128:-1" -q:v 10 out/screenshot_128x72.jpeg

  Any help is appreciated (I also posted a bounty ^_^)

  Thanks guys !