XPost: alt.comp.os.windows-10, rec.photo.digital   
   From: use.replyto@this.is.invalid   
      
   On Tue, 5 Nov 2024 13:23:54 -0700, Oliver wrote:   
      
   > how do you speed up just a disjoint section or two of a video clip?   
      
   This speedup.cmd should speed up 2 sections inside a 50-minutes video.   
   Streams not explicitly referenced will be left from output.   
      
   :: ----------------------------------------------------------------------   
   set "filter=        [0:v]trim  =   00: 600                                
   [v_01];"   
   set "filter=%filter%[0:a]atrim =   00: 600                                
   [a_01];"   
   set "filter=%filter%[0:v]trim  =  600:1200,setpts=(PTS-STARTPTS)*.5       
   [v_02];"   
   set "filter=%filter%[0:a]atrim =  600:1200,asetpts=PTS-STARTPTS,   
   tempo=2[a_02];"   
   set "filter=%filter%[0:v]trim  = 1200:1800                                
   [v_03];"   
   set "filter=%filter%[0:a]atrim = 1200:1800                                
   [a_03];"   
   set "filter=%filter%[0:v]trim  = 1800:2400,setpts=(PTS-STARTPTS)*.5       
   [v_04];"   
   set "filter=%filter%[0:a]atrim = 1800:2400,asetpts=PTS-STARTPTS,   
   tempo=2[a_04];"   
   set "filter=%filter%[0:v]trim  = 2400:3000                                
   [v_05];"   
   set "filter=%filter%[0:a]atrim = 2400:3000                                
   [a_05];"   
   set "filter=%filter: =%"   
      
   set "parts=[v_01][a_01][v_02][a_02][v_03][a_03][v_04][a_04][v_05][a_05]"   
   set "out=concat=n=5:v=1:a=1[new]"   
      
   ffmpeg -i in.mp4 -filter_complex "%filter% %parts% %out%" -map "[new]" out.mp4   
   :: ----------------------------------------------------------------------   
      
   (F-Up set to acf.)   
      
   BeAr   
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   = What do you mean with: "Perfection is always an illusion"?              =   
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