Re: [FFmpeg-user] frame rate change w/o changing frames
On Wed, Jan 08, 2020 at 20:48:56 +, Wayne Poll wrote: > > I would like to speed up this video. I figure it would be nice to > > simply increase the frame rate to 60 fps, so a x2.002 speed-up. > > > > Can this be done without re-encoding the video? I tried: > You need to include a filter, like this: - > -r 60 -vf "setpts=(1/2)*PTS" You cannot use filters without re-encoding the video. You *can* use bitstream filters though. I seem to recall there was an idea of a "setpts" bitstream filter, but I can't find the thread on ffmpeg-devel. This could have changed speed without reencoding. Cheers, Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] frame rate change w/o changing frames
Am Mi., 8. Jan. 2020 um 21:32 Uhr schrieb Green Koopa : > > I have a video from a GoPro Hero8. It was recorded at 29.97 fps. I would > like to speed up this video. I figure it would be nice to simply increase > the frame rate to 60 fps, so a x2.002 speed-up. > > Can this be done without re-encoding the video? I tried: > ffmpeg -r 60 -i in.mp4 -c:v copy -c:a copy out.mp4 > This gave me output that was slightly (1MB, 0.1%) smaller, > but the same length in time. It should work if you extract the video first: $ ffmpeg -i in.mp4 -c copy -f rawvideo out $ ffmpeg -r 60 -i out -c copy out.mp4 (You may need an mkv file as additional intermediate) I don't understand why you are also trying to copy audio, this will most likely not work... Carl Eugen ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] frame rate change w/o changing frames
>I have a video from a GoPro Hero8. It was recorded at 29.97 fps. I would like >to speed up this video. I figure it would be nice to simply increase the frame >rate to 60 fps, so a x2.002 speed-up. > >Can this be done without re-encoding the video? I tried: >ffmpeg -r 60 -i in.mp4 -c:v copy -c:a copy out.mp4 This gave me output that >was slightly (1MB, 0.1%) smaller, but the same length in time. You need to include a filter, like this: - -r 60 -vf "setpts=(1/2)*PTS" Full command would be like this: - ffmpeg -i in.mp4 -c:v copy -c:a copy -r 60 -vf "setpts=(1/2)*PTS" out.mp4 (I haven't tested this exact CL but I use this type of fame rate change a lot...). WRP ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] frame rate change w/o changing frames
I have a video from a GoPro Hero8. It was recorded at 29.97 fps. I would like to speed up this video. I figure it would be nice to simply increase the frame rate to 60 fps, so a x2.002 speed-up. Can this be done without re-encoding the video? I tried: ffmpeg -r 60 -i in.mp4 -c:v copy -c:a copy out.mp4 This gave me output that was slightly (1MB, 0.1%) smaller, but the same length in time. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
