Hi! Yes, I was confused and didn't realize that ffmpeg can do all this :) because I first made a python script that creates star trails videos and they are copied when processing the next step.
But for normal video, i use ffmpeg -i /mnt/ramdisk3g/workdir/%d.jpg -r 16 -vcodec mpeg4 -qsale 1 -y -filter:v "framestep=1,setpts=1.0*PTS" /mnt/ramdisk/mp4/ So I left the image multiplying step (from the python side) and Now there is now only 1 of each image in the workdir. Dropped out tblend because it makes image blur or something. https://drive.google.com/file/d/1HfG9WsUtE70DZT62SsqIUeIiZ9ZMwvbR/view?usp=sharing I'm going to use the above to finish star trails videos later too. Thanks again Ted! Regards, Jippo On Thu, 10 Sep 2020 at 02:20, Edward Park <[email protected]> wrote: > Hi, > > > ffmpeg -i /mnt/ramdisk3g/workdir/%d.jpg -r 120 -vcodec mpeg4 -qsale 1 -y > > -filter:v " setpts=0.23*PTS"'' /mnt/ramdisk/mp4/ > > > > And the result is this > > > https://drive.google.com/file/d/1acRm7vWwJAXz1jEU66nuD7Db9mrtPuz-/view?usp=sharing > > > > In workdir i have multiplied every image 6 times with python counter loop > > and total number of files are 1374 when there is only 229 > > Iam pretty happy to results now. Not sure how that minterpolate works > but i > > will try use that too. > > > Glad you got something that works for you, but tbh what I suggested was > basically to do nothing, just make a super fast slideshow, essentially. > > That example video wasn't even made using FFmpeg, I opened 110 frames from > your sample in an image viewer and held down the arrow key to "animate" > them, a book-corner doodle flipbook on a computer, if you will. > > It's fine as long as it works, but I think you can still eliminate some > steps. > > For example you said you multiplied each image 6 times, I'm guessing that > means you made 6 identical files, so the same frame is on screen 6 times, > which makes the video 6× slower. > > IIRC, images read in get timestamped as if 25fps by default, but you can > change it, instead of actually duplicating the images (-framerate 25/6). > > Then the "setpts=0.23*PTS" basically increases the speed by 1/0.23 ≈ 4.3×, > around 109fps. > > The final framerate is fixed at 120fps with "-r 120" (which I assume is > necessary) which duplicates frames to fill 120 from the ~109fps that is > available. > > I just feel like this is too much stretching and shrinking the "tape" to > get an effective 25/6/0.23 fps, or 12.61 seconds if you are adjusting by > length. All you need to do is set the rate you want before the input. > > > https://media.kumowoon1025.com/videos/example/starvideo-deduplication-cf.mp4 > < > https://media.kumowoon1025.com/videos/example/starvideo-deduplication-cf.mp4 > > > > The "-r" option will duplicate the frames as needed to reach the fps you > set. The minterpolate filter will try to improve upon that by interpolating > between frames to generate the "in-between" frames to fill in by analyzing > the existing ones instead of simply duplicating them. There's not a lot of > obvious motion here, so try blend as the mode (I think this may have been > what you had in mind with tblend at the start) > > https://media.kumowoon1025.com/videos/example/starvideo-minterpolate.mp4 < > https://media.kumowoon1025.com/videos/example/starvideo-minterpolate.mp4> > > Regards, > Ted Park > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
