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• Output video file of ffmpeg command video and audio doesn't match

  6 juillet 2022, par Barry

  i'm trying to trim a video file using ffmpeg using this command
ffmpeg -i input.mp4 -ss 00:05:20 -t 00:10:00 -c:v copy -c:a copy output.mp4 . The problem is when i open the output video, the audio starts normally but the video appears only 5 seconds after. I tried removing the -c copy option and output is accurate but the process is very slow. So my question is how to make output video/audio match when using -c copy option, or how to make the process faster when not using -c copy option. It's my first time using this so i don't know much about video/audio encoding, i am just trying to extract a video clip from a php script.

  


• FFmpeg : How to convert horizontal video 16:9 to vertical video 9:16, with blurred background on top and bottom sides

  13 janvier 2016, par gomezo

  I know there is a post to do the contrary :
  FFmpeg : How to convert vertical video with black sides, to video 16:9, with blurred background sides

  but i can’t figure out how to do this with ffmpeg

  here is the input :

  

  and here is the expected result (the background video should be zoomed with the same aspect ratio, cropped to 9/16 and blurred) :

  

  Thanks for your help !

• Can I extract an audio clip (a single word) from the video and insert at different points/timeline of same video using FFMPEG/libvlcsharp ?

  16 décembre 2019, par Siddharth

  I want to load a video that has a soundtrack, and I want it to take an audio clip of a single spoken word and I want the clip inserted at different points in the video. The output will be the new video. I also want to insert an image at certain points in the video (watermark).

  Can I do this using FFMPEG or libvlcsharp ?