Questions tagged [scale]
The scale tag has no usage guidance.
40
questions
0
votes
0
answers
4
views
Optimizing scaled video for quality and performance
I'm using obs to live stream a number of cameras, and pc sources. All are at 1080, but I want to resize some for picture in picture.
Keeping the aspect ratio the same, is it better, for image quality ...
- 101
0
votes
0
answers
6
views
I've already recorded my iphone video at a non-ideal zoom - anything I can do to make the best of the situation?
Sorry I know nothing about cameras/recording. I'd like to maximize the video-quality given my current situation, and also appreciate any basic tips for next time!
I have an iPhone 14, and I recorded ...
- 101
0
votes
1
answer
19
views
Free software to zoom in/out using curve functions
I need to smoothly zoom "through" a person's eye to another scene behind it. The closest I've come is a linear function zoom in Kdenlive that appears to slow to a crawl the closer you get. I'...
- 3
1
vote
0
answers
289
views
Convert 4:3 to 16:9 like QuickTime Panoramic Size
QuickTime has an awesome feature called "Panoramic Size". It basically scales the input video to the screen aspect ratio without cropping by leaving the center as-is and gradually increasing ...
0
votes
0
answers
26
views
Does scale behave differently than position in after effects animation?
In the GIF, if you notice, it looks like the scale is relatively fast at the beginning and gradually becomes slow at the end of loop. So I feel speed of zoom (scale) is not constant:
However, when I ...
- 95
3
votes
1
answer
3k
views
ffmpeg vf scale shifts colors to washed out
Im trying to scale video down. No matter what I do the colors are always washed up as a result.
original:
After scaling:
Code I run for it
ffmpeg -i input.mkv -vf scale=1028:-1 output.mkv
log: log
...
- 33
2
votes
1
answer
1k
views
Scale video without keeping aspect ratio in ffmpeg
I want to make a video 'wide', so the width is increased and the height stays the same as of the input image. I use the following command: ffmpeg -i test.mp4 -vf scale="1000:200" output.mp4. ...
- 21
0
votes
1
answer
359
views
FFMPEG - Crop and Chromakey not working together?
Having an issue with the chromakey portion not working after the scale. Any ideas?
ffmpeg -i background1080.png -i file.mp4 -filter_complex "[1]scale=1612:906[inner];[0][inner]overlay=154:170; [1:v]...
- 11
1
vote
1
answer
706
views
FFmpeg Batch encoding error: CRF/CQP is incompatible with 2pass
I am trying to create a batch file with 2 passes. Pass 1 scales the video. Pass 2 pads a border around it. They both work separately but will not work together.
Pass 1:
@echo off
REM Scale video to ...
- 21
18
votes
4
answers
16k
views
How do the super resolution filters in FFmpeg work?
I need to incorporate a small amount of 1080p HD shots in a 2160p 4K composition. I'm not impressed by default upscaling techniques like lanczos/bicubic/trilinear; it seems like my television does a ...
- 293
0
votes
1
answer
2k
views
How to fix scale Key-framing issue
I have been facing an issue with my Premiere Pro for a while now and no matter how hard I tried to find a solution, I never managed to find something that will fix my specific problem so that is why I ...
1
vote
2
answers
4k
views
FFmpeg does not preserve colors after resizing
I would like to resize a 4K mkv video to 1920×1080 with ffmpeg version 3.4.6-0ubuntu0.18.04.1 on Ubuntu 18.04. The original file has the following features:
Input #0, matroska,webm
encoder : ...
- 111
1
vote
1
answer
2k
views
FFmpeg scale video filter does not working as expected
I am confused a bit. scale video filter does not scales the video to specified dimensions but doing something different.
For example:
$ youtube-dl -f 134 https://youtu.be/aqz-KE-bpKQ -o 1.mp4 # ...
- 113
0
votes
1
answer
1k
views
ffmpeg fade in from center (with scale image)
I'm trying to apply the effect fade in and zoom/scale image for X seconds. I don't have problems with fade in but how to achieve effect to scale image during X seconds when the first frame is no image ...
- 103
0
votes
1
answer
880
views
Convert 3d video to double 2d video using ffmpeg
I want to convert 3d video to 2d video. I saw another topic How to convert a 3D movie to 2D using ffmpeg but as far I know 3d video is build from 2 videos so I should be double output video. One for ...
- 101
0
votes
1
answer
2k
views
ffmpeg scaler options not working
https://ffmpeg.org/ffmpeg-scaler.html
ffmpeg -i in.png -vf scale=3840:2160 -sws_flags lanczos out.png
-vf scale=3840x2160:flags=lanczos
I went down the list upscaling a 720p image to 4k using the ...
- 513
0
votes
0
answers
241
views
Upscale the key frames while decoding!
I would like to apply some kind of super-resolution (SR) to the keyframes in an H.264 video. The SR process should target the keyframes and upscale them by a factor of 2.
For the past few days, I've ...
2
votes
1
answer
2k
views
How to combine and optimize ffmpeg filters to avoid encoding multiple times?
I never worked with ffmpeg before and I'm wondering which optimization I can take for my situation.
In a loop I have multiple input.mp4 files which I first convert one by one to have a common scale ...
- 23
0
votes
1
answer
310
views
FFmpeg scale video to desire size
I have an video with this resolution: 1920x1080,
I want to scale it to 480x852, like this video:
https://scontent-frx5-1.cdninstagram.com/vp/d7b76fe78c9ad72016b98dcda320a6ca/5BA532D8/t50.16885-16/...
- 3
0
votes
1
answer
865
views
Setting different resolution for encoding and display when encoding in ffmpeg
I'd like to encode a video, say, in 960 x 720 but have video players automatically play it in 1280 x 720.
I know how to do this in 2 steps, by first encoding in 960 x 720 (ffmpeg with -vf scale=960:...
- 103
0
votes
1
answer
308
views
How to expand stroke width in one direction
am trying to scale the stroke width of a shape in AE in only one direction instead of all direction equally. Please assist
6
votes
2
answers
7k
views
How to combine ffmpeg vf commands for resizing and color correction?
I'm currently using the following batch script to run an ffmpeg command:
@echo off
title Convert videos to Mp4 h.264 with FFMPEG.
echo This script will find all video files of a given extension then ...
- 2,164
2
votes
1
answer
2k
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 ...
- 21
2
votes
3
answers
10k
views
Scale, position, and zoom a still image in Premiere Pro CC
I have a photo collage I am trying to move around, scale, position, and zoom in and out of on the images with in the collage. Whenever I go to scale out of the first image and move to the second image ...
- 21
3
votes
1
answer
5k
views
What is the difference between 'Set To Frame Size' and 'Scale To Frame Size'?
In Premiere Pro CC; what is the difference between 'Set To Frame Size' and 'Scale To Frame Size'?
I need to blow up a video to fill a larger frame. I am going from SD 720x480 to HD 720x1280 frame ...
- 61
3
votes
2
answers
2k
views
How can I scale more than 300% in Premiere?
I am using the transform effect to scale a clip. I need a scale of around 500%, however the scale control seems to be limited to 300%.
Is there any way I can scale the clip more than 300% using the ...
- 131
1
vote
1
answer
1k
views
I scaled down a video, but the bit rate does not change
I have a 3000 by 3000 VR video encoded in H264. I scaled down the video by
ffmpeg -i input.mp4 -vf scale=2160:2160 output.mp4
To my surprise, the bit rate of output.mp4 did not decrease (in fact, it ...
- 277
0
votes
2
answers
217
views
Making video content for 30' x 10' 3:1 Widescreen
Looking for some help on how content should be created for an upcoming show with super widescreen blend on it.
The show consists of a 30' x 10' front projection screen with unblended resolution of ...
- 101
12
votes
3
answers
20k
views
How to convert a 3D movie to 2D using ffmpeg
I am looking for a way to convert a 3d movie to a 2d movie.
I found a reference on this forum.
http://www.ffmpeg-archive.org/How-to-re-encode-3d-video-to-2d-video-td4676271.html
- 243
3
votes
1
answer
4k
views
Scaling videos of variable size to a fixed aspect ratio
I have 45 videos of varying aspect ratios and resolutions.
I need to scale all of them so that they fit neatly inside a 640x360 (16x9) container with the following specs:
16x9, 640x360, 1600kbps, H....
- 671
3
votes
2
answers
6k
views
Downscaling 4K YUV420 to 1080p YUV444 with ffmpeg introduces red tint
I am downscaling 4K YUV420 video from the Panasonic LX100 to Full HD YUV444 using the ffmpeg console in Windows, and a script provided by user karl on the Personal View forum, modified for outputting ...
- 161
0
votes
2
answers
5k
views
Downscaling 4k to 1080p in Premiere Pro, Image Zooming 2x
When I drop 4k footage onto the timeline in Premiere Pro, I get a 4k sequence. When I change the sequence to 1080p, the image zooms in. This makes sense. I then scale the image back 50% and I'm back ...
3
votes
1
answer
1k
views
Converting a Video from 1600*1200 to 1920*1080
How can I convert a video from 1600*1200 to 1920*1080 ?
I know that the aspect will be not correct, but I just like to do.
With Handbrake I can't do it, because it will not allow me to go beyond the ...
- 355
2
votes
2
answers
2k
views
Width and Height troubles
I am new to AE, and hope this question makes sense for you and is easy to answer.
On my website I have some images in portrait format with 2085 × 2560 px. Now I will add a mp4 video file, which will ...
- 31
1
vote
2
answers
715
views
How to scale a layer in pixelated fashion in After Effects?
How to scale a layer in pixelated fashion? I.e. each pixel of the image will grow to the block of pixels in the final scene without smoothing or blending (see picture below):
WORKAROUND
To achieve ...
- 169
5
votes
1
answer
4k
views
ffmpeg - resize and crop
I want to know how to use the scale filter to take an image that is 2154x1136 and scale it down exactly 89.04% such that the image sits in a 1920x1080 frame, with full image left and right and black ...
- 51
5
votes
2
answers
1k
views
Upscaling or downscaling videos
I was wondering, is upscaling from the videoplayer worse then upscaling the video during encode?
For example, consider the original source of a video is 640 x 480. Which of the following will produce ...
- 51
1
vote
0
answers
562
views
Trouble scaling 2880x1800 to 1080p without blurring in Premiere Pro
I have a project I'm producing where the source clips are generated from Quicktime doing a screen recording. The dimensions are 2880 x 1800, 60fps.
The source dimensions are a little unusual, but ...
- 111
0
votes
1
answer
713
views
Best presets to scale legacy 4:3 and 5:4 videos using ffmpeg
We have videos in row format (.mov) that are 4:3 (768x576) and 5:4 (720x576). We have a recommended preset for streaming over DASH to HTML5 and Silverlight players (this is the second pass):
ffmpeg -...
- 131
0
votes
3
answers
3k
views
replace a clip with a different size clip but keep the scale in Premiere CC
I have edited a 640 x 360 clip into a sequence in Premiere CC. The sequence includes changes to the scale for different shots. Now I want to replace the 640 x 360 clip with a 1920 x 1080 version of ...
- 1,589