Oct 6, 2019 · The setpts filter evaluates the expression and assigns the value as the timestamp for the current frame it is processing.
Filtering in FFmpeg is enabled through the libavfilter library. In libavfilter, a filter can have multiple inputs and multiple outputs.
Sep 7, 2023 · The speed of a video stream can be changed by changing the presentation timestamp (PTS) of each video frame. This can be done via two methods.
Mar 14, 2018 · PTS is presentation timestamp, the time at which the frame ought to be presented ie shown. If you divide each frame's timestamp by 2 (0 -> 0, 0.5 -> 0.25, 1 -> ...
Apr 24, 2021 · Remove video segments (without audio) · setpts : change the PTS (presentation timestamp) of the frame filter. · = : option for the setpts filter.
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Dec 25, 2020 · I'm trying to change the frame rate (and thus duration) of a video with no audio stream. My video is 23 seconds long @ constant 30 fps but I want to make it ...
May 27, 2024 · Yes, the issue is that my input is 25 fps and my output is 60 fps. So the setpts value needs to be multiplied by 60/25 to "fill in" the frames.
Oct 5, 2022 · To speed up the video by four times, use -vf "setpts=0.25*PTS". Preventing frames from being dropped. There's also a way to speed up the video ...
Jan 26, 2022 · I'm not aware of any videoSpeed method. The usual way is setpts filter .videoFilters('setpts=PTS/2') Sign up for free to join this conversation on GitHub.
Jul 16, 2024 · To speed up a video using ffmpeg, you can use the setpts filter for the video stream and the atempo filter for the audio stream.