Questions tagged [framerate]

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11 views

Frame rate (FPS) multiplied by duration (sec) isn't equal to total frames

On a YouTube video stats, apparently, the frame rate is 30 fps: Total video length is 1:32 i.e. 92 sec. Total frames = frame rate x time Total frames = 30 x 92 = 2760 So why are frames reported as ...
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17 views

Why do we still have difference between Media Time and SMPTE Time Code?

I'm implementing a web application which works with video sources with SMPTE time codes printed on it. Often the SMPTE and media time differs, my understanding of the reason based on what I have read ...
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1answer
43 views

A framerate of 30.30 has become common the past couple years. What is it about the number 30.30 that is significant? Why not an even 30, for example?

I typically resample the framerate to 30 when I'm encoding (much of my source video was streamed and has unreliable native framerate). But these 30.30 videos I tend to leave at 30.30 just because I ...
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1answer
37 views

Are there any Windows video players that don't stutter when looping?

Title. I have spent the past few hours trying to smoothly loop a short 6-second animation I made in Blender. No matter what I use (VLC, Windows Movies and TV, heck I even tried installing MPlayer), ...
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1answer
71 views

Why do we still shoot 23.976 if NTSC and PAL have been replaced?

I watched this video and had loads of questions. If NTSC ran into problems with colour and therefore slowed down 30 to 29.976, and 24 to 23.976, why didn't PAL have the same problems and slow down 25 ...
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10 views

Convert MPEG-4 movie file to proper pitch and time-length (currently too fast)

I've got a video of The Band's 1970 performance of Long Black Veil. It is in the key of Ab instead of G and the video is shorter in length as a result; it is a half-step up in pitch and x-seconds ...
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1answer
17 views

how do I create 23 fps proxies for footage shot in 30 fps and interpreted as 23 fps

I am trying to create 23 fps proxies for footage shot in 30 fps and interpreted as 23 fps I watched and carefully followed the Youtube video that explains exactly this and I am still getting out of ...
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2answers
79 views

Halve framerate without complete re-encoding

Is there any tool that can manipulate / transcode h264 or h265 video streams throwing away approximately half of the frames, without performing a full re-encode? I'm thinking it would be theoretically ...
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12 views

Why does the number of frames in a video differ?

I have a video file which I want to spilt into individual frames. I have enabled VLC to do this using the frame filter. But each time I play it I get a different number of frames? Why is that?
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16 views

ticker text does not run really smooth

I want to create a ticker text video like the news ticker you see sometimes in TV. So I use ffmpeg -loop 1 -i Transparent_800x20.png -vf drawtext="fontsize=16:fontcolor=black:fontfile=...
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104 views

Convert 4k 30fps iPhone footage (.mov) from variable framerate to constant framerate and keep .mov format

When I shoot video at 4k 30fps with an iPhone 11 and an iPhone XR as secondary camera, the resulting files have a variable framerate (VFR). When I try to edit them in iMovie (I will upgrade to Final ...
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1answer
28 views

h264 Settings for Motion Tracking & Analysis (technical photography)?

I'm trying to do "scientific" video motion analysis. Right now I'm using a Raspberry Pi camera, which records natively in h264, which then needs to be converted/wrapped as MP4. Is h264 an ...
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56 views

FFMPEG - MXF to DASH FrameRate

I'm converting a MXF file to DASH using FFMPEG, but having a hard time maintaing the frame rate, if you can see from the below input file has a frame rate of 25, but the mpd file has a frame rate of ...
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1answer
800 views

Editing a Mac Screen Recording in Premiere Pro causes image fragmentation

I'm making some tutorials about how to use a website. I'm using the built in Apple Screen Recording to record the screen on a Macbook Pro with a retina screen. I'm then loading the resulting .mov file ...
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323 views

Want to Blend Frames when Converting from 60fps to 30fps with FFmpeg

I have created some videos of a game I played to upload to YouTube. The game plays at 60fps & the original videos have been recorded at 60fps. However, YouTube re-encodes them down to 30fps using ...
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11 views

Variable audio drift from screen captured VR project in Unity

I'm new to video editing, and I need to sync up the audio and video from two different sources for a Virtual Reality game. Basically, I have the VR itself running in Unity on one computer, with the ...
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160 views

Changing FPS from 29.97 to 30 in ffpmeg creates short blank at end of video, audio is fine

I am trying to merge 5 parts of a continuous video using ffmpeg. For some reason, the 1st part is encoded at 29.97 FPS, while all the others are at 30 FPS. part #1 : 29.97 fps, 29.97 tbr, 19200 tbn, ...
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69 views

If my footage is 15fps, why does Premiere try to create a 29.97 fps sequence when I create a sequence from it?

I'm editing some footage from Eecamm's Skype recorder. The footage appears to be 15fps 1280x720. In Premiere CC 2019, when I drop it onto the New Sequence icon, the sequence automatically generated ...
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0answers
9 views

What is the best monitor refresh rate (in Hz) to remove flickering when filming at 24 frames per second with a 1/50 shutter speed?

I tried setting the monitor to 50 Hz and 100 Hz, but I still see flickering. Everything looked fine when the monitor was set to 60 Hz and the shutter speed to 1/25. That being said, I am trying to ...
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1answer
20 views

syncing slideshow with music

So im currently creating a music oriented slideshow with a bundle of images that needs to be changed each beat of the music. Problem is, the music is 129 bpm which results in 2.15 beats per second. ...
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1answer
653 views

How to change Timeline's output time from “Frames” to “Timecode” (Premiere Pro)

I was editing a video for a friend when I accidentally changed my Timeline's timestamps from "Timecode" to Frames" It has been really frustrating to figure out what second of footage I am on when ...
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0answers
89 views

Screen-Video with 7 FPS (in Davinci Resolve - or other tools?)

I currently edit/cut a lot of computer screen recording footage. The original mp4 files have 7 FPS and I am totally happy with that quality. If I now edit the files in Davinci Resolve 16, the lowest ...
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2answers
62 views

How to stop horizontal scrolling lines caused by fluorescent light (USA and NTSC)?

I'm trying to record something for a school project and my lighting is underneath fluorescent lighting. My camera is set to 30 fps but records at 29.97 fps (seen on pc). I've tried to copy the clip, ...
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1answer
168 views

Adobe After Effects - Why is my position marker not set to a frame?

In after effects, one of my compesitions is comprised soley of static images, vectors, solids, and other non-movie footage. One such static image layer lasts from frame 0 for 100 frames. Another user ...
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1answer
2k views

Sony Vegas - render allowing source to adjust frame rate?

I have a bunch of mobile phone videos (different phones), that I want to render to one single video using sony vegas. Should I check allow source to adjust frame rate when rendering? Or should I ...
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1answer
3k views

Show current frame or display timecode (frames) on MPC-HC?

Does anybody know if this is possible? I know how to encode timecode display using ffmpeg but I would like to avoid this step and find a way in MPC (currently my favorite video player). CTRL+J doesn't ...
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1answer
1k views

Variable bitrate for AAC - how to reach it?

I tried encoding audio stream into AAC with a variable bitrate mode — I followed the advice from FFmpeg VBR Settings and changed my original option -b:a 128k to -q:a 1.3 in this original command ...
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1answer
21 views

Vegas Pro 13 : Project's and Timeline's framerate are suddenly not the same

So here's the thing : I'm editing on Vegas Pro 13, 25fps according to my origninal files. I just imported some sound I "mixed" externally. And now, my timeline acts in 24fps although my project is ...
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1answer
458 views

FFmpeg convert to HD video format that Adobe Premiere Pro will not crash on?

My problem is somewhat similar to others asked on the site in recent years, but none of those solutions were quite right for my problem: I have a series of frames from a video recorded at roughly 30 ...
3
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1answer
28 views

Use of time remapping to stabilize the velocity of a rotating object?

I have a video of myself inside of a human-powered rotating drum. This video's shot at 60 frames per second, but due to to the unreliable velocity of human operators, this drum rotates at different ...
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2answers
770 views

how can I convert slow motion video into normal speed without losing fps or audio sample rate?

I want to download a slow-motion video playlist (with the frame rate of the videos being either 480 fps or 1000 fps.) and be able to speed up the videos at least 16x without losing the frame rate or ...
4
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1answer
67 views

What is the proper notation for a frame rate that is less than 1FPS?

For example should 1 frame per minute be 1FPM or should it be expressed as FPS using a decimal.
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2answers
992 views

Using 60 fps footage on 23.976 sequence without slowing down or dropping frames

I just recorded a 4k 60 fps clip from my GoPro and dropped it with some other clips on a timeline which is 23.976 fps, and the 60 fps clip looks really weird and glittery. Is there a way to play ...
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1answer
531 views

Why both videos are of same file size?

I am using ProMovie Recorder to record high quality videos using iPhone X, and I noticed a weird thing today. Here's what I did: I recorded a 4K 60fps video for 6 seconds (HEVC encoding). I recorded ...
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1answer
1k views

Why are there missing frames in the Vegas Pro editing timeline?

I found the weirdest thing in Vegas Pro 13. I was trying to verify the exact frames of a generated file, so was looking for a zero number frame to drop it into the timeline. I was surprised to find ...
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0answers
866 views

ffmpeg convert H264 CFR + timestamps to VFR

I have a H264 video source that was recorded with variable framerate (VFR) and a text file with frame ID, timestamp pairs that looks like this: frameId,timestamp 1890413473,13792093 1890413474,...
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2answers
35 views

Ideal frame rate for video with moving objects

I am working on a drone to capture a soccer game. What should be ideal minimum frame rate for the camera? Does it depend on velocity of objects(ball, players) in the game?
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2answers
65 views

Two video sources framerates vary by .01 FPS. Will this cause problems?

I'm just getting started and have some user-level equipment, not professional grade. My Sony Handycam outputs MTS and MP4 at 29.97 FPS. My LG K30 smartphone outputs MP4 at 29.98FPS Using Davinci ...
2
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1answer
2k views

FFmpeg encode variable input framerate

I have a Qt application running, i hijack the openGL frameBuffer when a new frame has been rendered. A new frame is drawned when only some changes appear in the scene, so no constant frameRate. Now i ...
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1answer
229 views

How to slow down ProRes file from 25fps to 16fps without re-encoding?

This works to change the speed, but it also changes the codec to MPEG4 Video (H264). ffmpeg -y -r 16 -i at25fps.mov -filter:v "setpts=25/16*PTS" at16fps.mov I need the codec to stay untouched: ...
3
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2answers
36 views

Why would it make sense to not be able to video in 30fps in a 720 resolution, and have to video in a higher resolution to get 30fps?

On my GoPro Hero 7 Black, I can choose to video in 720, 1080, 2.7k, or 4k. I can choose 24, 30, 60, 120, or 240 fps. I wanted to take a video that I didn't need to be able to slow down, and did't ...
3
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1answer
134 views

Is there a NLE that supports Variable frame rate?

Now before you quickly jump in and say: Premier got an update... Use handbrake... What I'm asking none of the big players seem to support. Rendering a video that's frame rate changes through the ...
2
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1answer
911 views

ffmpeg operations yielding changing fps values

I have a video that was rendered as 26.51 fps h.264 into an mkv by my video editor. Calling the file up in ffmpeg it displayed this file as 1k fps, 26.51 tbr. When I applied an operation to separate ...
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1answer
408 views

Is it possible for the viewers to get rid of the 60FPS fast forward effect?

Since I and Everyone else watched too many 24/30FPS throught our lives, whenever We see 60FPS or faster motion picture we feel like its fast forwarded thus makes it terribly unnatural. I want to ...
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1answer
171 views

Can duplicate frames effect motion?

I understand that sometimes when editing, converting, and rendering new videos you can end up with duplicate frames. In other words, two successive frames can be exactly identical. To what extent can ...
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1answer
1k views

What is the difference between audio Sampling rate and Frame rate?

I have a video file with audio. ffprobe reports two different numbers: Sampling rate and Frame rate. I understand the 48kHz rate--there are 48,000 audio samples every second. What is the other number, ...
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1answer
1k views

How do I speed up slower video framerates with ffmpeg and get full 240fps and no truncated videos?

I have a whole bunch of sports video clips that range from 6 to 25 seconds each, all recorded at 240fps but slowed down to 23.97, 25, 29.97 and 30fps (so they're in super slow motion). I need to ...
1
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1answer
2k views

Set display time of individual frames in FFmpeg

I have a set of images that I extracted from a GIF animation for the purpose of enhancement (which I have done), but now that it's time to convert the still images into a video (I'm going to use webm ...
2
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2answers
266 views

Flickering when doubling shutter speed

I have a Nikon D750 and cannot figure out the logic behind video (or still photos in live view) and flickering. I live in Norway, so the electricity is 50 Hz. If I shoot video at 1/50 or 1/100 second ...
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1answer
180 views

Problem setting different framerates with FFmpeg map option

I am facing a problem to set video streams framerates with FFmpeg when using the map option. Here is what I want to do: Given an input video file of 60 fps, I want to generate an output file ...