![]() You can speed up or slow down audio with the atempo audio filter. Other options include slowmoVideo and Butterflow. This is also known as "motion interpolation" or "optical flow".įfmpeg -i input.mkv -filter:v "minterpolate='mi_mode=mci:mc_mode=aobmc:vsbmc=1:fps=120'" output.mkv You can smooth out slow/fast video with the minterpolate video filter. To slow down your video, you have to use a multiplier greater than 1:įfmpeg -i input.mkv -filter:v "setpts=2.0*PTS" output.mkv For example, to go from an input of 4 FPS to one that is sped up to 4x that (16 FPS):įfmpeg -i input.mkv -r 16 -filter:v "setpts=0.25*PTS" output.mkv You can avoid dropped frames by specifying a higher output frame rate than the input. Note that this method will drop frames to achieve the desired speed. For example, if there are two succesive frames shown at timestamps 1 and 2, and you want to speed up the video, those timestamps need to become 0.5 and 1, respectively. The filter works by changing the presentation timestamp (PTS) of each video frame. To double the speed of the video with the setpts filter, you can use:įfmpeg -i input.mkv -filter:v "setpts=0.5*PTS" output.mkv Then generate new timestamps while muxing to a container:įfmpeg -fflags +genpts -r 30 -i raw.h264 -c:v copy output.mp4Ĭhange the value of -r to the desired playback frame rate. Use this if you require no other changes to your input video.įirst, copy the video to a raw bitstream format.įfmpeg -i input.mp4 -map 0:v -c:v copy -bsf:v h264_mp4toannexb raw.h264įfmpeg -i input.mp4 -map 0:v -c:v copy -bsf:v hevc_mp4toannexb raw.h265 This method is lossless and apart from changing the timestamps, copies the video stream as-is. Note that in the following examples, the audio stream is not changed, so it should ideally be disabled with -an. ![]() This can be done via two methods: using the setpts video filter (which requires re-encoding) or by erasing the timestamps by exporting the video to a raw bitstream format and muxing to a container while creating new timestamps. These are relatively inexpensive ways to improve performance without spending serious money on upgrading parts.The speed of a video stream can be changed by changing the presentation timestamp (PTS) of each video frame. ![]() If your PC is a few years old, you might also consider swapping out the thermal paste on your CPU cooler and perhaps even considering doing the same for your graphics card. Get yourself some compressed air and blow it through your fans. Remove any dust covers or mesh panels from your case and give them a clean. If you're not keeping on top of maintenance then something as simple as dust and dirt building up on air intakes could be ruining your fun. ![]() One way around this is to simply clean your PC. So you could be getting less FPS as a result. This means they're intelligently reducing power usage in order to stop your components from breaking. If your PC is running too hot then both your graphics card and CPU may be thermally throttling. If you're not getting the performance boost you deserve and your gaming machine looks like something like the one pictured above then you might need to give it a clean. ![]() PC gaming tips and tricks Level up your Steam game: Tips and tricks to get more out of Valve's game store How to stream PC games to another device easily How to check your monitor's refresh rate and adjust it How to check CPU and GPU temps easily How to enable G-Sync on your gaming PC and monitor How to start streaming your gaming: All the gear you need How to optimise your PC for gaming 12 easy tips to get more FPS and better performance on your gaming PC How to transfer PC games to your Steam Deck Tips to get the most out of your new Nvidia RTX GPU How to fix slow game downloads on Steam: Tips and tricks to boost download speeds Is your PC bottlenecking? How to check for performance problems How to use Bluetooth headphones with your Steam Deck Why is my computer so slow? Tips to improve your PC performance How to check PC specs: Find the full specifications of your computer How to take better game screenshots on PC How to add a mic to any headphones for PC gaming How to easily capture gameplay footage for your YouTube channel How to update Nvidia drivers and cleanly install them for the best results ![]()
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