How do I add a 1 second fade out effect to the end of a video with ffmpeg?





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How do I add a simple one or half second fade effect to the start or end of a video using ffmpeg and keep everything else the same (codec,quality)






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    I am not a ffmpeg expert, I am using it sometimes. But I know it is well documented. So I've tried google.com/search?q=ffmpeg+add+fade+out Short answer: hoover.gplrank.info/?p=531 Long Answer: stackoverflow.com/questions/44291954/… ... And for automation of the process: video.stackexchange.com/questions/19867/…

    – LupusE
    Mar 26 at 7:58




















2















How do I add a simple one or half second fade effect to the start or end of a video using ffmpeg and keep everything else the same (codec,quality)






ffmpeg video-editor







share|improve this question


















  • 1





    I am not a ffmpeg expert, I am using it sometimes. But I know it is well documented. So I've tried google.com/search?q=ffmpeg+add+fade+out Short answer: hoover.gplrank.info/?p=531 Long Answer: stackoverflow.com/questions/44291954/… ... And for automation of the process: video.stackexchange.com/questions/19867/…

    – LupusE
    Mar 26 at 7:58
















2












2








2


1






How do I add a simple one or half second fade effect to the start or end of a video using ffmpeg and keep everything else the same (codec,quality)






ffmpeg video-editor







share|improve this question














How do I add a simple one or half second fade effect to the start or end of a video using ffmpeg and keep everything else the same (codec,quality)






ffmpeg video-editor




ffmpeg video-editor






share|improve this question













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asked Mar 26 at 7:41









llllll

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  • 1





    I am not a ffmpeg expert, I am using it sometimes. But I know it is well documented. So I've tried google.com/search?q=ffmpeg+add+fade+out Short answer: hoover.gplrank.info/?p=531 Long Answer: stackoverflow.com/questions/44291954/… ... And for automation of the process: video.stackexchange.com/questions/19867/…

    – LupusE
    Mar 26 at 7:58
















  • 1





    I am not a ffmpeg expert, I am using it sometimes. But I know it is well documented. So I've tried google.com/search?q=ffmpeg+add+fade+out Short answer: hoover.gplrank.info/?p=531 Long Answer: stackoverflow.com/questions/44291954/… ... And for automation of the process: video.stackexchange.com/questions/19867/…

    – LupusE
    Mar 26 at 7:58










1




1





I am not a ffmpeg expert, I am using it sometimes. But I know it is well documented. So I've tried google.com/search?q=ffmpeg+add+fade+out Short answer: hoover.gplrank.info/?p=531 Long Answer: stackoverflow.com/questions/44291954/… ... And for automation of the process: video.stackexchange.com/questions/19867/…

– LupusE
Mar 26 at 7:58







I am not a ffmpeg expert, I am using it sometimes. But I know it is well documented. So I've tried google.com/search?q=ffmpeg+add+fade+out Short answer: hoover.gplrank.info/?p=531 Long Answer: stackoverflow.com/questions/44291954/… ... And for automation of the process: video.stackexchange.com/questions/19867/…

– LupusE
Mar 26 at 7:58












2 Answers
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  1. find out the number of frames in the video clip. Command:



    ffmpeg -i clip.mp4 -vcodec copy -f rawvideo -y /dev/null 2>&1 | tr ^M 'n' | awk '/^frame=/ {print $2}'|tail -n 1
    
5130


  2. Find the frames per second



fps



it's 24





  1. Add fade in/out



    ffmpeg -i clip.mp4 -vf "fade=in:0:24,fade=out:5106:24" -acodec copy clip-out.mp4



Done






share|improve this answer































    1














    For a 10 second duration video, 1 second fade in in beginning, 1 second fade out in the ending use the fade filter:



    ffmpeg -i input.mp4 -vf "fade=type=in:duration=1,fade=type=out:duration=1:start_time=9" -c:a copy output.mp4


    If you want to fade audio too then add the afade filter:



    ffmpeg -i input.mp4 -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time=9[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time=9[a]" -map "[v]" -map "[a]" output.mp4


    To automate it use ffprobe to get the duration and bc to calculate the start time for the fade out at the end:



    #!/bin/bash
    
mkdir fade
    
for f in *.mp4; do
    
  dur=$(ffprobe -loglevel error -show_entries format=duration -of default=nk=1:nw=1 "$f")
    
  offset=$(bc -l <<< "$dur"-1)
    
  ffmpeg -i "$f" -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time='$offset'[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time='$offset'[a]" -map "[v]" -map "[a]" fade/"$f"
    
done


    This assumes all inputs have video and audio. If not you can use an if/then statement in conjunction with ffprobe to determine if there is audio.




    ...and keep everything else the same (codec,quality)




    Filtering requires encoding. You can't keep the quality when outputting a lossy format. Either output a lossless format (not recommended, huge files, compatibility issues), or accept some amount of loss. Luckily you probably won't notice. Just use the -crf option when outputting H.264 video. Use the highest value that still looks good enough. See FFmpeg Wiki: H.264 for more details.






    share|improve this answer


























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      2 Answers
      2






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      2 Answers
      2






      active

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      1
















      1. find out the number of frames in the video clip. Command:



        ffmpeg -i clip.mp4 -vcodec copy -f rawvideo -y /dev/null 2>&1 | tr ^M 'n' | awk '/^frame=/ {print $2}'|tail -n 1
        
5130


      2. Find the frames per second



      fps



      it's 24





      1. Add fade in/out



        ffmpeg -i clip.mp4 -vf "fade=in:0:24,fade=out:5106:24" -acodec copy clip-out.mp4



      Done






      share|improve this answer




























        1
















        1. find out the number of frames in the video clip. Command:



          ffmpeg -i clip.mp4 -vcodec copy -f rawvideo -y /dev/null 2>&1 | tr ^M 'n' | awk '/^frame=/ {print $2}'|tail -n 1
          
5130


        2. Find the frames per second



        fps



        it's 24





        1. Add fade in/out



          ffmpeg -i clip.mp4 -vf "fade=in:0:24,fade=out:5106:24" -acodec copy clip-out.mp4



        Done






        share|improve this answer


























          1












          1








          1









          1. find out the number of frames in the video clip. Command:



            ffmpeg -i clip.mp4 -vcodec copy -f rawvideo -y /dev/null 2>&1 | tr ^M 'n' | awk '/^frame=/ {print $2}'|tail -n 1
            
5130


          2. Find the frames per second



          fps



          it's 24





          1. Add fade in/out



            ffmpeg -i clip.mp4 -vf "fade=in:0:24,fade=out:5106:24" -acodec copy clip-out.mp4



          Done






          share|improve this answer















          1. find out the number of frames in the video clip. Command:



            ffmpeg -i clip.mp4 -vcodec copy -f rawvideo -y /dev/null 2>&1 | tr ^M 'n' | awk '/^frame=/ {print $2}'|tail -n 1
            
5130


          2. Find the frames per second



          fps



          it's 24





          1. Add fade in/out



            ffmpeg -i clip.mp4 -vf "fade=in:0:24,fade=out:5106:24" -acodec copy clip-out.mp4



          Done







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Mar 26 at 13:32









          VijayVijay

          2,1041822




          2,1041822

























              1














              For a 10 second duration video, 1 second fade in in beginning, 1 second fade out in the ending use the fade filter:



              ffmpeg -i input.mp4 -vf "fade=type=in:duration=1,fade=type=out:duration=1:start_time=9" -c:a copy output.mp4


              If you want to fade audio too then add the afade filter:



              ffmpeg -i input.mp4 -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time=9[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time=9[a]" -map "[v]" -map "[a]" output.mp4


              To automate it use ffprobe to get the duration and bc to calculate the start time for the fade out at the end:



              #!/bin/bash
              
mkdir fade
              
for f in *.mp4; do
              
  dur=$(ffprobe -loglevel error -show_entries format=duration -of default=nk=1:nw=1 "$f")
              
  offset=$(bc -l <<< "$dur"-1)
              
  ffmpeg -i "$f" -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time='$offset'[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time='$offset'[a]" -map "[v]" -map "[a]" fade/"$f"
              
done


              This assumes all inputs have video and audio. If not you can use an if/then statement in conjunction with ffprobe to determine if there is audio.




              ...and keep everything else the same (codec,quality)




              Filtering requires encoding. You can't keep the quality when outputting a lossy format. Either output a lossless format (not recommended, huge files, compatibility issues), or accept some amount of loss. Luckily you probably won't notice. Just use the -crf option when outputting H.264 video. Use the highest value that still looks good enough. See FFmpeg Wiki: H.264 for more details.






              share|improve this answer






























                1














                For a 10 second duration video, 1 second fade in in beginning, 1 second fade out in the ending use the fade filter:



                ffmpeg -i input.mp4 -vf "fade=type=in:duration=1,fade=type=out:duration=1:start_time=9" -c:a copy output.mp4


                If you want to fade audio too then add the afade filter:



                ffmpeg -i input.mp4 -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time=9[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time=9[a]" -map "[v]" -map "[a]" output.mp4


                To automate it use ffprobe to get the duration and bc to calculate the start time for the fade out at the end:



                #!/bin/bash
                
mkdir fade
                
for f in *.mp4; do
                
  dur=$(ffprobe -loglevel error -show_entries format=duration -of default=nk=1:nw=1 "$f")
                
  offset=$(bc -l <<< "$dur"-1)
                
  ffmpeg -i "$f" -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time='$offset'[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time='$offset'[a]" -map "[v]" -map "[a]" fade/"$f"
                
done


                This assumes all inputs have video and audio. If not you can use an if/then statement in conjunction with ffprobe to determine if there is audio.




                ...and keep everything else the same (codec,quality)




                Filtering requires encoding. You can't keep the quality when outputting a lossy format. Either output a lossless format (not recommended, huge files, compatibility issues), or accept some amount of loss. Luckily you probably won't notice. Just use the -crf option when outputting H.264 video. Use the highest value that still looks good enough. See FFmpeg Wiki: H.264 for more details.






                share|improve this answer




























                  1












                  1








                  1







                  For a 10 second duration video, 1 second fade in in beginning, 1 second fade out in the ending use the fade filter:



                  ffmpeg -i input.mp4 -vf "fade=type=in:duration=1,fade=type=out:duration=1:start_time=9" -c:a copy output.mp4


                  If you want to fade audio too then add the afade filter:



                  ffmpeg -i input.mp4 -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time=9[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time=9[a]" -map "[v]" -map "[a]" output.mp4


                  To automate it use ffprobe to get the duration and bc to calculate the start time for the fade out at the end:



                  #!/bin/bash
                  
mkdir fade
                  
for f in *.mp4; do
                  
  dur=$(ffprobe -loglevel error -show_entries format=duration -of default=nk=1:nw=1 "$f")
                  
  offset=$(bc -l <<< "$dur"-1)
                  
  ffmpeg -i "$f" -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time='$offset'[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time='$offset'[a]" -map "[v]" -map "[a]" fade/"$f"
                  
done


                  This assumes all inputs have video and audio. If not you can use an if/then statement in conjunction with ffprobe to determine if there is audio.




                  ...and keep everything else the same (codec,quality)




                  Filtering requires encoding. You can't keep the quality when outputting a lossy format. Either output a lossless format (not recommended, huge files, compatibility issues), or accept some amount of loss. Luckily you probably won't notice. Just use the -crf option when outputting H.264 video. Use the highest value that still looks good enough. See FFmpeg Wiki: H.264 for more details.






                  share|improve this answer















                  For a 10 second duration video, 1 second fade in in beginning, 1 second fade out in the ending use the fade filter:



                  ffmpeg -i input.mp4 -vf "fade=type=in:duration=1,fade=type=out:duration=1:start_time=9" -c:a copy output.mp4


                  If you want to fade audio too then add the afade filter:



                  ffmpeg -i input.mp4 -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time=9[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time=9[a]" -map "[v]" -map "[a]" output.mp4


                  To automate it use ffprobe to get the duration and bc to calculate the start time for the fade out at the end:



                  #!/bin/bash
                  
mkdir fade
                  
for f in *.mp4; do
                  
  dur=$(ffprobe -loglevel error -show_entries format=duration -of default=nk=1:nw=1 "$f")
                  
  offset=$(bc -l <<< "$dur"-1)
                  
  ffmpeg -i "$f" -filter_complex "[0:v]fade=type=in:duration=1,fade=type=out:duration=1:start_time='$offset'[v];[0:a]afade=type=in:duration=1,afade=type=out:duration=1:start_time='$offset'[a]" -map "[v]" -map "[a]" fade/"$f"
                  
done


                  This assumes all inputs have video and audio. If not you can use an if/then statement in conjunction with ffprobe to determine if there is audio.




                  ...and keep everything else the same (codec,quality)




                  Filtering requires encoding. You can't keep the quality when outputting a lossy format. Either output a lossless format (not recommended, huge files, compatibility issues), or accept some amount of loss. Luckily you probably won't notice. Just use the -crf option when outputting H.264 video. Use the highest value that still looks good enough. See FFmpeg Wiki: H.264 for more details.







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Mar 26 at 17:51

























                  answered Mar 26 at 17:43









                  lloganllogan

                  5,4251737




                  5,4251737






























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