Questions tagged [framerate]
The framerate tag has no usage guidance.
142
questions
0
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2answers
40 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 ...
0
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0answers
36 views
Preparing videos for video machine learning with ffmpeg (equal frame rate, crop, reduce size, strip audio)
I'm working on video machine learning and have a directory with plenty of small (1min up to 14min) *.avi files with different sizes and aspect ratios, slightly different frame rates (e.g. 25 Hz, 22 Hz,...
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0answers
12 views
After Effects Time warp with scene cut sensitivity
I am trying to use time warp to adjust the frame rate of a video. The issue is that when a scene changes, time warp tries to create frames in between the scene cut, causing strange ghosting and weird ...
3
votes
1answer
24 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.
1
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2answers
73 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 ...
0
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1answer
35 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 ...
0
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0answers
12 views
Several Frame Rates on one Timeline
I recently shot a trip for a group of kids that went to the USA . Not knowing any better, I shot everything at 59.94 fps so I could slow it down later if I wanted to. I recently started editing and I ...
0
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0answers
8 views
premiere cs6 all clips play at same fps regardless of source fps
I have set up a project in Adobe Premiere Pro CS6. I have various source clips at two different frame rates, 29.97 and 59.94.
Using various methods (i.e. "new sequence from clip", new sequence and ...
0
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1answer
203 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 ...
0
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0answers
8 views
Audio subtly out of sync with video - how to fix?
I have an MKV file that has an issue with the audio - it subtly lags behind the video. They start in sync, and then over the course of the whole clip they drift out of sync.
My first idea was that ...
0
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0answers
216 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,...
0
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2answers
29 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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0answers
14 views
Do digital cinema projectors follow the same “dark-bright” pattern as traditional projectors?
Not sure if this is the right Stack Exchange for this question, but please point me toward a better site if it exists.
In Daniel Dennett's book, "Consciousness Explained," he writes:
Standard ...
1
vote
2answers
43 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 ...
1
vote
1answer
491 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 ...
0
votes
1answer
52 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: ...
2
votes
2answers
27 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
votes
1answer
55 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
votes
1answer
509 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 ...
0
votes
1answer
61 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 ...
0
votes
1answer
27 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 ...
1
vote
1answer
126 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, ...
1
vote
1answer
397 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
vote
1answer
322 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
votes
2answers
53 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 ...
1
vote
1answer
62 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 60fps, I want to generate an output file ...
0
votes
1answer
30 views
Why do high FPS videos look less blurry than real life?
Quickly wave your hand in front of your face right now. Looks really blurry right? Now watch a 60 fps video. How come it looks so smooth? To me 60 FPS videos look even smoother than real life. Why?
1
vote
1answer
454 views
Frame rate mismatch when converting to raw video
I am trying to convert a H.264 video to rawvideo using the following command:
ffmpeg -r 50 -i test.ts -c:v rawvideo -r 50 -pix_fmt yuv420p -filter_complex "[0:v] setpts=PTS-STARTPTS" -y test.yuv
...
1
vote
1answer
1k views
ffmpeg timecode and -r
Following up on this question: ffmpeg drawtext timecode source framerate
I want to change the frame rate of a file, scale it down and burn the timecode in one operation.
ffmpeg -i in.mpg -r 24 -vf "...
0
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1answer
2k views
Why setting -r 30 still gives fps=15 in ffmpeg?
Why setting -r 30 still gives fps=15 in ffmpeg?
command:
fmpeg -loglevel verbose -pixel_format mjpeg -s hd720 -r 30 -i /dev/video1 -f libx264 -preset ultrafast -tune zerolatency -crf 23 -f matroska ...
0
votes
1answer
28 views
Why sometimes I can set framerate sometimes I can't?
Why I get the following when I try to get camera feed from Logitech webcam?
The driver changed the time per frame from X to Y
Sometimes it happens sometimes it doesn't.
How should I resolve this ...
0
votes
1answer
344 views
Should I rather be shooting 1080/50i or 720/50p for 25fps web use?
The camera here is a Samsung HMX-Q10P (P likely stands for PAL: the N model would have 60fps instead).
The videos I upload usually are 25fps either way, but strictly speaking 1080/50i will never give ...
2
votes
1answer
300 views
Is this video 50p or 25p?
I have some footage shot with a Lumix DMC-FZ38 with the video format set to AVCHD and the SH (super high?) quality setting.
The manual says:
[AVCHD Lite] (With audio)
When set to [SH]: ...
0
votes
3answers
60 views
Increase framerate in post-production?
I know this is doable because many higher-dollar televisions on the market today are able to take a 24fps input and smooth out the frames for an effective framerate up to 960fps (for Sony).
Would it ...
2
votes
1answer
1k views
How to use ffmpeg to fade in/out a veriable frame rate video clip with unknown duration
I have been looking for a way to use ffmpeg to downscale some MPEG-4 (Base Media / Version 2) video files recorded with a variable frame rate, adding fade in/out effects at the head and tail of each ...
1
vote
1answer
1k views
Wrong frame-rate, corrupted playback of isom/mp4 files remuxed from H.264/AC3 MPEG-TS
NOTE: This question is superceded by this new one, please do not answer below this post.
What happened?
[Edit] DVB file ('file1') in TS format of H.264/AC3@50i cannot be properly remuxed into any ...
2
votes
1answer
150 views
Dropping Frames when Playing back Sped Up Footage in PP CC 2018
My playback of footage that is sped up 500% is awful in PP CC 2018 on my desktop but fine on my laptop. My CPU utilization is not maxing out on my desktop but I'm still dropping 90% of my frames. I'm ...
1
vote
1answer
27 views
Is it possible to get a better quality by increase the frame rate, even if I don't have the raw footage?
Is it possible to improve the quality of a movie just be rediting the finished product to have more fps? Or do you still need the original raw footage to actually increase the quality?
0
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0answers
578 views
How should I use Audition to convert audio for retimed 24fps to 25fps for broadcast?
I have to convert the audio tracks of my 24 fps movie to match up with retimed 25fps so that it can be exported alongside the 25fps video (just playback speed change) for broadcast transmission.
I ...
1
vote
1answer
62 views
Does increasing the framerate while not changing the content affects compression quality?
This question has no practical importance for a regular video production pipeline, but nonetheless it's something I find fascinating because it would imply video codecs use temporal sub-sampling ...
1
vote
0answers
239 views
Trying to understand the delay converting a sequence of images to video
I am using java to create image files that I am converting to video using FFMPEG. I am creating the midi and audio simultaneously on reaper then using the duration of the notes on the midi file to ...
0
votes
1answer
147 views
Metadata says the video is 25i, but MPC plays it as 50i
I have a DVD with footage which I want to convert to h264/h265. Mediainfo says that the video is 720x576, MPEG-2 encoded, PAL 25 fps and interlaced which is the first time I've seen that, usually 25 ...
2
votes
1answer
72 views
Preserving Frame Rate
I'm a physicist with no experience in video production.
I work with satellite imagery and I have created timelapses where one frame corresponds to one minute. It matters I preserve the time/frame ...
3
votes
2answers
46 views
Shutter Speed or frame rate we looking at when dealing with flickering issue?
I'm using SONY RX10M3 to shoot video at 1000fps. But using conventional lighting system I get flickering. Now I'm planning to buy a LEDs light by STRATUS, which they stated that :
Flicker free at ...
1
vote
1answer
108 views
Recording Hi8 SD NTSC home movies ideal quality with ffmpeg?
I have a Dazzle DVC 100 that I'm using to connect an old 8mm camcorder up to in an attempt to digitize all our home movies.
The videos are all NTSC SD I believe and I've had the best success at ...
1
vote
1answer
81 views
Shadowplay Footage Import to iMovie Introduces Audio Artifacts
I've been playing around with this to vary degrees of success and I'm getting slightly confused by what I'm seeing (or rather hearing in this case). Just playing the clips in a player like QT or VLC ...
1
vote
3answers
2k views
Is it meaningful to raise frame rate, if so what is the best option?
I have a 3000 by 3000 VR video encoded in H264, the frame rate is 30fps. Now I want to raise the frame rate to 60fps, I am using this command
ffmpeg -i input.mp4 -r 60 output.mp4
My questions are:
...
1
vote
1answer
49 views
A Sony Pro camera's spec shows it shots in 29.97fps, does it really mean it?
According to this ffmpeg documentation, it seems one of the 'native' frame rate for ffmpeg is
'ntsc': 30000/1001
while 30000/1001=29.9700... does not equal to 29.97, I wonder if a Sony Pro ...
1
vote
1answer
201 views
Is it still meaningful to have 29.97fps under ATSC standard?
According to this video, we use 29.97fps under NTSC standard.
But now we have ATSC standard, do we still need 29.97fps in order to broadcast under ATSC?
Is it still meaningful to have a newly ...
0
votes
1answer
938 views
Lower framerate without re-encode
I'm looking for a way to lower the framerate of an H264 mp4 video without re-encoding the video.
Example: I have a 30 FPS input file and I need it to be 5 FPS. I want to avoid re-encoding because of ...
