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I guess there are many better ways to achieve my desired outcome, probably directly from multiple videos to output. #Ffmpeg speed up video time lapse how to#So I have the following command to convert into images:įor %A IN (raw\*.mp4) DO ffmpeg.exe -i "%A" -r 0.03636 image\imaged.bmpĪnd then I would convert to my video with (although I have only tried this with one video)įfmpeg.exe -i image\imaged.bmp -s:v 1440x1080 -c:v libx264 -crf 17 -pix_fmt yuv420p timelapse\output.mp4įocusing on step one, the problem I have is that it overwrites the images with the next video and I cant figure out how to stop it. Starting with the ten minute video in mind, I think the files are 24 fps so to achieve ten minutes I think I need to slice up the videos by setting the framerate to 0.03636 (24 FPS/ 660) where 10 minutes from 110 hours is 660. I think that the camera splits files into 1 hour segments so there is around 110 hours of footage that I want to convert into a few different timelapse/ speed up files of probably 2 mins/ 5 mins and 10 mins with no audio. > ive played with slicing the videos into images and put them in here If you care to sync the audio speed with the video speed, things get a bit more complicated. If you use a larger value, the video will display in slower motion. The lower the PTS value, the faster the time-lapse video is generated. #Ffmpeg speed up video time lapse mp4#mp4 files and I have created the following folder structure on my windows machine: ffmpeg-i input.mp4 -filter:v 'setpts2PTS' output.mp4. #Ffmpeg speed up video time lapse series#I have captured all the videos from my unify G4 bullet camera into a series of. The Player might not support the file type or a required codec might not be installed on your computer.I am hoping to use ffmpeg to produce a timelapse of my garden renovation but im having some trouble. 2.48 Slow motion or timelapse only for a segment of the video.95. “Windows Media Player cannot play the file. 2.47 Changing the speed: slow motion and timelapse.94. In your case calculate the ratio via outputtime / inputtime. I go over two techniques in FFmpeg to turn a long video into a 'timelapse'. #Ffmpeg speed up video time lapse manual#FFMPEG manual for more insight for what is happening here. The PTS variable is multiplied by a fraction of the original, 70 minutes or 4200 second clip. The mencoderprogram has a special option, -speed, that will speed This means that if we use -speed nthen we should get the desired video frame rate. printf 'file s ' raw/.mp4 > videos.txt ffmpeg -f concat -i videos.txt -vf 'setpts0.1PTS' -r 30 -s 1440x1080 -c:v h264 -crf 17 -pixfmt yuv420p -an timelapse/output10x.mp4. Now lets speed things up so the entire 1 hour 10 minute video runs for 15 seconds. ![]() Here is the error message received when choosing. Generate a list of video files and use concat to generate a 10x timelapse, set at 30 fps for output. MPG as the output file when running this script. AVI as the output as ffmpeg chooses a codec that windows media player will not play. Thank god for ffmpeg, and that pr0gr4mm3r (Andrew Wells) published this simple how-to on the subject. On the other hand, if you want to slow down the video 2x (0.5 of the normal. After much google/searching, the only capable purchasable product I found was the Mac/Apple products ($500 ). Change Video Speed If you want to speed up the video 2x, setpts will be 0.5 (1/2). ![]() #Ffmpeg speed up video time lapse software#I paid $100 for a piece of windows software (Roxio Easy Media Creator 10) that I assumed would do such a stupifyingly simple task as time-lapse video, but it did not. 1 Answer Sorted by: 1 Basic template is ffmpeg -i in -vf 'setpts (PTS-STARTPTS)/20,fps20' out or ffmpeg -i in -vf 'setpts (PTS-STARTPTS)/20' -r 20 out Without the fps filter or -r option, ffmpeg will assume the framerate of the output stream is still 1 fps and so will drop 19 out of each 20 retimed frames. ![]() I should have known that a Linux solution would come to save the day. I should have remembered ffmpeg from my past while backing up security camera footage at my day job. I am looking for help with a command line entry (or writing a script) to create a time lapse video of a specific duration. Cripes! I can’t believe how difficult it is to do something so trivial as turn a 30 minute video into a 1 minute video. ![]()
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