All Questions
12
questions
0
votes
1
answer
778
views
Double Video Length With FFMPEG (No Audio)
I have a time lapse video with 29.97003 FPS. There is no audio. The video is too fast. I would like to lengthen it from 10 seconds to 20 seconds, while keeping each frame with like 15 FPS.
How can I ...
- 121
1
vote
1
answer
3k
views
Reduce video frame rate from 60 to 30 fps without re-encoding and keeping original duration
I have a video with these specifications:
4320x2160p
60 fps
20.0 Mb/s bitrate
AVC format (x264)
Since my smartphone can play videos up to 30 fps at that resolution, I need a fast way to reduce the ...
- 25
1
vote
0
answers
600
views
Extract frames from a video results in abnormaly more frames for each fps by using ffmpeg
I have a job of using ffmpeg to extract the frames averagely from a video, with different fps. I use this command for it.
ffmpeg -i input.mp4 -r specified_fps -q:v 2 image %4d.png
And I have 3 ...
- 11
2
votes
1
answer
1k
views
Concat many video: wrong out FPS & audio Pitch
I have a process like this:
i have N input video; I cut & transcode them using the following code:
ffmpeg.exe -c:v h264_cuvid -resize 1920x1080 -noaccurate_seek -ss 00:00:04.000 -to 00:00:44.240 -...
- 31
0
votes
2
answers
4k
views
What is Variable Frame rate?
Variable frame rate (or VFR) is a term in video compression for a
feature supported by some container formats which allows for the frame
rate to change actively during video playback, or to drop ...
- 187
0
votes
0
answers
192
views
How do I output a video that is over 600 fps on FFmpeg?
I have two videos that I want to concatenate, one is 29.97 fps and the other is 30.41 fps. I'm trying to make it look perfect by making the frame rate 91138.77 fps, but it can only go up to 600 fps. ...
- 11
1
vote
1
answer
3k
views
What are the factors that affects a video's quality?
I am new to this website and this is my first question, really appreciate if someone can provide some advice about my current problem.
I've been testing some videos on my computer to see at what ...
- 11
0
votes
3
answers
11k
views
Change framerate on MKV container
I got a problem with playback of some MKV containers (89 items, totalling 196,3 GB).
The audio+video are encoded in 25 fps, but the subs are totally out of sync - these are encoded on 23.976 fps.
My ...
- 13
2
votes
1
answer
4k
views
What is the lowest FPS at which the human eye can notice a flickering image? (testing this with ffmpeg)
I wanted to check what the lowest FPS is that the human eye cannot notice as flicker.
I created a white jpg and a black JPG. I started with 25 fps which means that I have 24 jpg of white and 1 of ...
- 131
1
vote
1
answer
536
views
Is there a recommended version of nvidia 8600gt drivers for Win 7? [closed]
I've read on some forums that people recommend an specific version of drivers for X gfx card and Y operative system.
Does someone knows if an older version of Nvidia 8600GT drivers for Win 7 that ...
- 11
9
votes
4
answers
22k
views
Video encoding: How much does the video file size increase with fps?
Given that the next blockbusters of e.g. Peter Jackson (The Hobbit) and James Cameron (Avatar 2) are going to be shot with a frame rate of 48 fps (or even more) - i.e. more than the usual 24 fps - I ...
- 1,716
11
votes
5
answers
25k
views
How to convert 1080@50i -> 720@50p using ffmpeg?
I really like 50fps video, but I cannot make ffmpeg convert it to 50fps for me.
720p resolution is absolutely fine with me, just need more FPS.
50i just looks much smoother in proper players (for ...
- 48