ffmpeg slow speed

相關問題 & 資訊整理

ffmpeg slow speed

Use -speed number (e.g. 8), not -preset setting (e.g. ultrafast ). The later is for x264/x265 encoding. A Higher number means faster encoding, ...,We're going to use pts (presentation time stamps) to speed-up our video of a factor 4: ffmpeg -i TheGoodTheBadAndTheUgly.mp4 -vf "setpts=0.25*PTS" ... , Simply multiply by the reciprocal of the speed factor. ffmpeg -i input.mkv -filter:v "setpts=PTS/60" output.mkv., You can use complex filters ffmpeg -i input.mkv -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mkv., Your current vertical speed is 1 pixel/frame, as your y expr is simply the input frame index n . To fully pan from top of bottom, y should start from ..., Speeding up/slowing down video. You can change the speed of a video stream using the ​setpts video filter. You can smooth out slow/fast video with the ​minterpolate video filter. Other options include ​slowmoVideo and ​Butterflow. You can speed up or slo, Change the speed and rate of a video (mpeg, mp4, webm) with ffmpeg. ... The lower the PTS value, the faster the time-lapse video is generated., Example : I want to speed up the first 4 seconds of my video. ... Speed up the part. ffmpeg -i slow.mp4 -filter:v "setpts=0.5*PTS" part-1.mp4 ..., ... 60.000000 $ ffmpeg -i input.mp4 -filter:v 'setpts=0.5*PTS' -filter:a ... slow your video to 80% of original speed and apply fadein & fadeout for ...

相關軟體 FFmpeg 資訊

FFmpeg
FFmpeg 是領先的多媒體框架,能夠解碼,編碼,轉碼,多路復用,解復用,流,過濾器,並發揮人類和機器創造的任何東西。它支持最尖端的古代格式。無論是由某個標準委員會,社區或企業設計的.8997423 選擇版本:FFmpeg 3.4.1(32 位)FFmpeg 3.4.1(64 位) FFmpeg 軟體介紹

ffmpeg slow speed 相關參考資料
ffmpeg - very slow conversion - Stack Overflow

Use -speed number (e.g. 8), not -preset setting (e.g. ultrafast ). The later is for x264/x265 encoding. A Higher number means faster encoding, ...

https://stackoverflow.com

FFmpeg video speed-up & slow down - 2018 - BogoToBogo

We're going to use pts (presentation time stamps) to speed-up our video of a factor 4: ffmpeg -i TheGoodTheBadAndTheUgly.mp4 -vf "setpts=0.25*PTS" ...

https://www.bogotobogo.com

How do I speed up a video by 60X in ffmpeg? - Super User

Simply multiply by the reciprocal of the speed factor. ffmpeg -i input.mkv -filter:v "setpts=PTS/60" output.mkv.

https://superuser.com

How to change video speed by ffmpeg? - Stack Overflow

You can use complex filters ffmpeg -i input.mkv -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mkv.

https://stackoverflow.com

How to make a PAN fasterslower speed with FFmpeg? - Stack Overflow

Your current vertical speed is 1 pixel/frame, as your y expr is simply the input frame index n . To fully pan from top of bottom, y should start from ...

https://stackoverflow.com

How to speed up slow down a video – FFmpeg

Speeding up/slowing down video. You can change the speed of a video stream using the ​setpts video filter. You can smooth out slow/fast video with the ​minterpolate video filter. Other options includ...

https://trac.ffmpeg.org

Modify Video Speed with ffmpeg - David Walsh Blog

Change the speed and rate of a video (mpeg, mp4, webm) with ffmpeg. ... The lower the PTS value, the faster the time-lapse video is generated.

https://davidwalsh.name

Speed up part of video using ffmpeg - Stack Overflow

Example : I want to speed up the first 4 seconds of my video. ... Speed up the part. ffmpeg -i slow.mp4 -filter:v "setpts=0.5*PTS" part-1.mp4 ...

https://stackoverflow.com

Speeding upslowing down video ffmpeg - Stack Overflow

... 60.000000 $ ffmpeg -i input.mp4 -filter:v 'setpts=0.5*PTS' -filter:a ... slow your video to 80% of original speed and apply fadein & fadeout for ...

https://stackoverflow.com