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• How to use ffmpeg to replace a scene in a video with a scene from another video ?

  20 juin 2020, par user16171

  I want to take a scene from Movie1 and replace it with a scene from Movie2.

  


  Movies 1 and 2 have different bitrates. Both are 1080p.

  


  I think I can figure this out with a combination of slicing and concatenating.

  


  Can I use a single command to do this ?

  


  e.g.,

  


  ffmpeg -i Movie1.mkv -i Movie2.mkv Movie1.mkv -filter_complex '[0:v] [0:a:0] [1:v] [1:a:0] [2:v] [2:a:0] concat=n=3:v=1:a=1 [v] [a]' -map '[v]' -map '[a]' Movie3.mp4

  


  This is just a start - I don't know how to specify the times to splice.

  


  For example, if I want to replace s=00:10:00 t=00:05:00 from Movie1 with s=00:20:00 t=00:05:00 from Movie2, how do I specify that ?

  


  Thanks.

  


• İ need help for ffmpeg Merge 2 videos

  18 juin 2020, par Çağrı Eren

  the code I wrote below takes two video files renders them into 1080p res, plays the 1st video for some time (5 secs) then plays the 2nd video foreground with the first video's audio still playing in the background.

  



  The length of the second video is taken as basis duration. If 2nd video's duration is shorter than 1st one, video freezes and audio keeps playing. If 2nd video is longer than the 1st, video continues in accordance with 1st video duration.

  



  string ar = $"-y -i \"{videoModel.dosya_yolu}\" -i \"video.mp4\" -filter_complex \"[1:v] scale=1920:1080 [a]; [0:v] scale=1920:1080 [b]; [b] [a] overlay=enable=gte(t\\,{baslangic}):x=0:y=0:shortest=1[out]\" -map [out] -map 0:a -c:v libx264 -crf 24 -preset ultrafast -c:a copy \"{cikti}\"";


  



  What I want to do is :

  



  

  1. if the 2nd video is shorter, it should start again and keep playing until the 1st video ends, and not freeze

  


  2. Even though each video is around 800mb, it renders out 4-5gb. It needs to be minimized without decreasing resolution

  


  3. it shouldn't modify resolution unless both videos have different resolutions.

  


  


• How to correctly execute the FFmpeg command to get the quality as in video or better quality live stream ?

  5 juin 2020, par Алина Хром

  I have an m3u8 file with 1080p quality, when I retransmit this to Youtube I only get 360p each time, what do I need to change in the request to get full 1080p quality or how do I properly execute cmd ?

  



  My Cmd :

  



  


  ffmpeg -re -i http://s15.strak.cf/content/stream/films/File.m3u8 -i usr/hls/log.png -filter_complex "overlay=W-w-25:H-h-25" -c:v libx264 -s 1280x720 
 -b:v 4M -maxrate 6M -crf 21 -preset veryfast -fflags nobuffer -flags low_delay -g 25 -sc_threshold 0 -c:a aac -b:a 128k -ac 2 -strict -2 -flags +global_header -bsf:a aac_adtstoasc -bufsize 3000k -f flv rtmp ://a.rtmp.youtube.com/live2/