Complex pulldown in ffmpeg possible?












0














Working on a research project with a color system that alernates between red (R) and green (G) pictures. We want to try different modes to bring that material to the digital domain. For this we want to try various pull-down sequences.



We want to project in 48fps or 60 fps.




  • Triple each frame: R1 R1 R1 G1 G1 G1

  • Triple each frame2: R1 G1 R1 G1 R1 G1

  • Insert black frame: R1 R1 R1 G1 G1 G1 BL

  • Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL

  • Insert black frame3: R1 G1 BL R2 G2 BL

  • Insert black frame4: R1 R1 BL G1 G1 BL


...and so on



Is this possible in ffmpeg?



The alternative is to write a simple script to copy and renumber an image sequence. Obviously, it would be faster and simpler to do it all from within ffmpeg.



Thank you for your help.










share|improve this question



























    0














    Working on a research project with a color system that alernates between red (R) and green (G) pictures. We want to try different modes to bring that material to the digital domain. For this we want to try various pull-down sequences.



    We want to project in 48fps or 60 fps.




    • Triple each frame: R1 R1 R1 G1 G1 G1

    • Triple each frame2: R1 G1 R1 G1 R1 G1

    • Insert black frame: R1 R1 R1 G1 G1 G1 BL

    • Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL

    • Insert black frame3: R1 G1 BL R2 G2 BL

    • Insert black frame4: R1 R1 BL G1 G1 BL


    ...and so on



    Is this possible in ffmpeg?



    The alternative is to write a simple script to copy and renumber an image sequence. Obviously, it would be faster and simpler to do it all from within ffmpeg.



    Thank you for your help.










    share|improve this question

























      0












      0








      0







      Working on a research project with a color system that alernates between red (R) and green (G) pictures. We want to try different modes to bring that material to the digital domain. For this we want to try various pull-down sequences.



      We want to project in 48fps or 60 fps.




      • Triple each frame: R1 R1 R1 G1 G1 G1

      • Triple each frame2: R1 G1 R1 G1 R1 G1

      • Insert black frame: R1 R1 R1 G1 G1 G1 BL

      • Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL

      • Insert black frame3: R1 G1 BL R2 G2 BL

      • Insert black frame4: R1 R1 BL G1 G1 BL


      ...and so on



      Is this possible in ffmpeg?



      The alternative is to write a simple script to copy and renumber an image sequence. Obviously, it would be faster and simpler to do it all from within ffmpeg.



      Thank you for your help.










      share|improve this question













      Working on a research project with a color system that alernates between red (R) and green (G) pictures. We want to try different modes to bring that material to the digital domain. For this we want to try various pull-down sequences.



      We want to project in 48fps or 60 fps.




      • Triple each frame: R1 R1 R1 G1 G1 G1

      • Triple each frame2: R1 G1 R1 G1 R1 G1

      • Insert black frame: R1 R1 R1 G1 G1 G1 BL

      • Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL

      • Insert black frame3: R1 G1 BL R2 G2 BL

      • Insert black frame4: R1 R1 BL G1 G1 BL


      ...and so on



      Is this possible in ffmpeg?



      The alternative is to write a simple script to copy and renumber an image sequence. Obviously, it would be faster and simpler to do it all from within ffmpeg.



      Thank you for your help.







      ffmpeg






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Dec 13 at 9:26









      Martin

      11




      11






















          2 Answers
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          1














          This can be carried out within ffmpeg using a series of filters.



          There are two considerations:



          a) change in number of frames, and

          b) sequencing of frames



          We'll use the fps filter to increase frame count. The filter will perform regular duplication to do this. Then the shuffleframes filter to achieve the sequence rearrangement required. We'll also need drawbox filter to generate black frames, if needed. These sequences can be output at any frame rate.



          We will ingest each image sequence at 1 fps as this makes calculations simpler.



          For




          Triple each frame: R1 R1 R1 G1 G1 G1




          ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


          The fps filter is used to triple the count of each frame. Due to how the fps filter works, we need to reset the stream timebase to get enough resolution for the next steps. It is set to AVTB i.e. 1/1000000 seconds. Then the frames are renumbered at 1/48th seconds intervals. Finally, the output framerate is set to 48.




          Triple each frame2: R1 G1 R1 G1 R1 G1




          ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 3 0 3 0 3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


          The fps triples each frame so 0 3 0 3 0 3 outputs six frames using the first copy of R1 and G1.




          Insert black frame: R1 R1 R1 G1 G1 G1 BL




          ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=4,shuffleframes=0 0 0 4 4 4 4 -1,drawbox=t=fill:enable=not(mod(n+1,7)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


          Here we quadruple each frame, then use shuffle to keep 7 out of each 8 frames, dropping the last one. Then use drawbox with enable to make each 7th frame black (t=fill draws a solid box. Default color is black).




          Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL




          ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 0 3 3 3 3:enable='mod(floor(n/6),2)',drawbox=t=fill:enable=not(mod(n+1,6)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


          Slightly trickier. shguffleframes only needs to applied to each alternate set of 6 frames. We use timeline editing i.e. enable option for that.




          Insert black frame3: R1 G1 BL R2 G2 BL




          ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=2,shuffleframes=0 2 2 -1,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


          Double frame count and keep 3 frames, drawing black on 3rd and dropping 4th.




          Insert black frame4: R1 R1 BL G1 G1 BL




          ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


          Simple. Just make each 3rd frame black.






          share|improve this answer





























            0














            Not only is it possible, it is alsoe easy and efficient: Use a concat file



            Assuming you have your frames in r1.png, ... g2.png etc. and 48 Hz (so a 20.8333.. ms timebase) a concat file fragment of



            file 'r1.png'
            duration 0.0625
            file 'g1.png'
            duration 0.0625


            will give 3 red1 frames, then 3 green1 frames (20.8333..*3=62.5)



            With these kinds of fragments you can build whatever sequence you need, then run



            ffmpeg -i /path/to/concatfile -c.... /path/to/outfile


            To create your clip.






            share|improve this answer





















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              2 Answers
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              1














              This can be carried out within ffmpeg using a series of filters.



              There are two considerations:



              a) change in number of frames, and

              b) sequencing of frames



              We'll use the fps filter to increase frame count. The filter will perform regular duplication to do this. Then the shuffleframes filter to achieve the sequence rearrangement required. We'll also need drawbox filter to generate black frames, if needed. These sequences can be output at any frame rate.



              We will ingest each image sequence at 1 fps as this makes calculations simpler.



              For




              Triple each frame: R1 R1 R1 G1 G1 G1




              ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


              The fps filter is used to triple the count of each frame. Due to how the fps filter works, we need to reset the stream timebase to get enough resolution for the next steps. It is set to AVTB i.e. 1/1000000 seconds. Then the frames are renumbered at 1/48th seconds intervals. Finally, the output framerate is set to 48.




              Triple each frame2: R1 G1 R1 G1 R1 G1




              ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 3 0 3 0 3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


              The fps triples each frame so 0 3 0 3 0 3 outputs six frames using the first copy of R1 and G1.




              Insert black frame: R1 R1 R1 G1 G1 G1 BL




              ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=4,shuffleframes=0 0 0 4 4 4 4 -1,drawbox=t=fill:enable=not(mod(n+1,7)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


              Here we quadruple each frame, then use shuffle to keep 7 out of each 8 frames, dropping the last one. Then use drawbox with enable to make each 7th frame black (t=fill draws a solid box. Default color is black).




              Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL




              ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 0 3 3 3 3:enable='mod(floor(n/6),2)',drawbox=t=fill:enable=not(mod(n+1,6)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


              Slightly trickier. shguffleframes only needs to applied to each alternate set of 6 frames. We use timeline editing i.e. enable option for that.




              Insert black frame3: R1 G1 BL R2 G2 BL




              ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=2,shuffleframes=0 2 2 -1,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


              Double frame count and keep 3 frames, drawing black on 3rd and dropping 4th.




              Insert black frame4: R1 R1 BL G1 G1 BL




              ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


              Simple. Just make each 3rd frame black.






              share|improve this answer


























                1














                This can be carried out within ffmpeg using a series of filters.



                There are two considerations:



                a) change in number of frames, and

                b) sequencing of frames



                We'll use the fps filter to increase frame count. The filter will perform regular duplication to do this. Then the shuffleframes filter to achieve the sequence rearrangement required. We'll also need drawbox filter to generate black frames, if needed. These sequences can be output at any frame rate.



                We will ingest each image sequence at 1 fps as this makes calculations simpler.



                For




                Triple each frame: R1 R1 R1 G1 G1 G1




                ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                The fps filter is used to triple the count of each frame. Due to how the fps filter works, we need to reset the stream timebase to get enough resolution for the next steps. It is set to AVTB i.e. 1/1000000 seconds. Then the frames are renumbered at 1/48th seconds intervals. Finally, the output framerate is set to 48.




                Triple each frame2: R1 G1 R1 G1 R1 G1




                ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 3 0 3 0 3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                The fps triples each frame so 0 3 0 3 0 3 outputs six frames using the first copy of R1 and G1.




                Insert black frame: R1 R1 R1 G1 G1 G1 BL




                ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=4,shuffleframes=0 0 0 4 4 4 4 -1,drawbox=t=fill:enable=not(mod(n+1,7)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                Here we quadruple each frame, then use shuffle to keep 7 out of each 8 frames, dropping the last one. Then use drawbox with enable to make each 7th frame black (t=fill draws a solid box. Default color is black).




                Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL




                ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 0 3 3 3 3:enable='mod(floor(n/6),2)',drawbox=t=fill:enable=not(mod(n+1,6)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                Slightly trickier. shguffleframes only needs to applied to each alternate set of 6 frames. We use timeline editing i.e. enable option for that.




                Insert black frame3: R1 G1 BL R2 G2 BL




                ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=2,shuffleframes=0 2 2 -1,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                Double frame count and keep 3 frames, drawing black on 3rd and dropping 4th.




                Insert black frame4: R1 R1 BL G1 G1 BL




                ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                Simple. Just make each 3rd frame black.






                share|improve this answer
























                  1












                  1








                  1






                  This can be carried out within ffmpeg using a series of filters.



                  There are two considerations:



                  a) change in number of frames, and

                  b) sequencing of frames



                  We'll use the fps filter to increase frame count. The filter will perform regular duplication to do this. Then the shuffleframes filter to achieve the sequence rearrangement required. We'll also need drawbox filter to generate black frames, if needed. These sequences can be output at any frame rate.



                  We will ingest each image sequence at 1 fps as this makes calculations simpler.



                  For




                  Triple each frame: R1 R1 R1 G1 G1 G1




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  The fps filter is used to triple the count of each frame. Due to how the fps filter works, we need to reset the stream timebase to get enough resolution for the next steps. It is set to AVTB i.e. 1/1000000 seconds. Then the frames are renumbered at 1/48th seconds intervals. Finally, the output framerate is set to 48.




                  Triple each frame2: R1 G1 R1 G1 R1 G1




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 3 0 3 0 3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  The fps triples each frame so 0 3 0 3 0 3 outputs six frames using the first copy of R1 and G1.




                  Insert black frame: R1 R1 R1 G1 G1 G1 BL




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=4,shuffleframes=0 0 0 4 4 4 4 -1,drawbox=t=fill:enable=not(mod(n+1,7)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  Here we quadruple each frame, then use shuffle to keep 7 out of each 8 frames, dropping the last one. Then use drawbox with enable to make each 7th frame black (t=fill draws a solid box. Default color is black).




                  Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 0 3 3 3 3:enable='mod(floor(n/6),2)',drawbox=t=fill:enable=not(mod(n+1,6)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  Slightly trickier. shguffleframes only needs to applied to each alternate set of 6 frames. We use timeline editing i.e. enable option for that.




                  Insert black frame3: R1 G1 BL R2 G2 BL




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=2,shuffleframes=0 2 2 -1,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  Double frame count and keep 3 frames, drawing black on 3rd and dropping 4th.




                  Insert black frame4: R1 R1 BL G1 G1 BL




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  Simple. Just make each 3rd frame black.






                  share|improve this answer












                  This can be carried out within ffmpeg using a series of filters.



                  There are two considerations:



                  a) change in number of frames, and

                  b) sequencing of frames



                  We'll use the fps filter to increase frame count. The filter will perform regular duplication to do this. Then the shuffleframes filter to achieve the sequence rearrangement required. We'll also need drawbox filter to generate black frames, if needed. These sequences can be output at any frame rate.



                  We will ingest each image sequence at 1 fps as this makes calculations simpler.



                  For




                  Triple each frame: R1 R1 R1 G1 G1 G1




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  The fps filter is used to triple the count of each frame. Due to how the fps filter works, we need to reset the stream timebase to get enough resolution for the next steps. It is set to AVTB i.e. 1/1000000 seconds. Then the frames are renumbered at 1/48th seconds intervals. Finally, the output framerate is set to 48.




                  Triple each frame2: R1 G1 R1 G1 R1 G1




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 3 0 3 0 3,settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  The fps triples each frame so 0 3 0 3 0 3 outputs six frames using the first copy of R1 and G1.




                  Insert black frame: R1 R1 R1 G1 G1 G1 BL




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=4,shuffleframes=0 0 0 4 4 4 4 -1,drawbox=t=fill:enable=not(mod(n+1,7)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  Here we quadruple each frame, then use shuffle to keep 7 out of each 8 frames, dropping the last one. Then use drawbox with enable to make each 7th frame black (t=fill draws a solid box. Default color is black).




                  Insert black frame2: R1 R1 R1 G1 G1 BL R2 R2 G2 G2 G2 BL




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,shuffleframes=0 0 3 3 3 3:enable='mod(floor(n/6),2)',drawbox=t=fill:enable=not(mod(n+1,6)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  Slightly trickier. shguffleframes only needs to applied to each alternate set of 6 frames. We use timeline editing i.e. enable option for that.




                  Insert black frame3: R1 G1 BL R2 G2 BL




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=2,shuffleframes=0 2 2 -1,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  Double frame count and keep 3 frames, drawing black on 3rd and dropping 4th.




                  Insert black frame4: R1 R1 BL G1 G1 BL




                  ffmpeg -framerate 1 -i frames%04d.jpg -vf "fps=3,drawbox=t=fill:enable=not(mod(n+1,3)),settb=AVTB,setpts=N/48/TB" -r 48 -y out.mp4


                  Simple. Just make each 3rd frame black.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Dec 13 at 13:12









                  Gyan

                  14.4k21644




                  14.4k21644

























                      0














                      Not only is it possible, it is alsoe easy and efficient: Use a concat file



                      Assuming you have your frames in r1.png, ... g2.png etc. and 48 Hz (so a 20.8333.. ms timebase) a concat file fragment of



                      file 'r1.png'
                      duration 0.0625
                      file 'g1.png'
                      duration 0.0625


                      will give 3 red1 frames, then 3 green1 frames (20.8333..*3=62.5)



                      With these kinds of fragments you can build whatever sequence you need, then run



                      ffmpeg -i /path/to/concatfile -c.... /path/to/outfile


                      To create your clip.






                      share|improve this answer


























                        0














                        Not only is it possible, it is alsoe easy and efficient: Use a concat file



                        Assuming you have your frames in r1.png, ... g2.png etc. and 48 Hz (so a 20.8333.. ms timebase) a concat file fragment of



                        file 'r1.png'
                        duration 0.0625
                        file 'g1.png'
                        duration 0.0625


                        will give 3 red1 frames, then 3 green1 frames (20.8333..*3=62.5)



                        With these kinds of fragments you can build whatever sequence you need, then run



                        ffmpeg -i /path/to/concatfile -c.... /path/to/outfile


                        To create your clip.






                        share|improve this answer
























                          0












                          0








                          0






                          Not only is it possible, it is alsoe easy and efficient: Use a concat file



                          Assuming you have your frames in r1.png, ... g2.png etc. and 48 Hz (so a 20.8333.. ms timebase) a concat file fragment of



                          file 'r1.png'
                          duration 0.0625
                          file 'g1.png'
                          duration 0.0625


                          will give 3 red1 frames, then 3 green1 frames (20.8333..*3=62.5)



                          With these kinds of fragments you can build whatever sequence you need, then run



                          ffmpeg -i /path/to/concatfile -c.... /path/to/outfile


                          To create your clip.






                          share|improve this answer












                          Not only is it possible, it is alsoe easy and efficient: Use a concat file



                          Assuming you have your frames in r1.png, ... g2.png etc. and 48 Hz (so a 20.8333.. ms timebase) a concat file fragment of



                          file 'r1.png'
                          duration 0.0625
                          file 'g1.png'
                          duration 0.0625


                          will give 3 red1 frames, then 3 green1 frames (20.8333..*3=62.5)



                          With these kinds of fragments you can build whatever sequence you need, then run



                          ffmpeg -i /path/to/concatfile -c.... /path/to/outfile


                          To create your clip.







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered Dec 13 at 9:54









                          Eugen Rieck

                          9,63522127




                          9,63522127






























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