Questions tagged [filter]
The filter tag has no usage guidance.
1
vote
1answer
9 views
What do I need to take into consideration to take video of molten glass which I will later postprocess?
I want to take video of one part of the of production process of glass pressing: gob delivery. I want to assess the shape of the gob, dimensions, and position in the mold.
I do not know much about ...
0
votes
1answer
18 views
Color leakage effects with ffmpeg blend=all_expr
I generate two test videos (the first a test pattern, the second solid red) with
ffmpeg -f lavfi -i testsrc=duration=5:size=1280x720:rate=30 pattern.mp4
ffmpeg -f lavfi -i color=c=red@0.2:duration=5:...
0
votes
0answers
17 views
ffmpeg - improving image quality of animated footage
I'm curious what video filters and render settings should be used and considered for improving the image quality of hand-drawn (animated) frames.
If I apply edits to a movie/images of this type (let'...
2
votes
0answers
14 views
help with ffmpeg quality check script
I am trying to write a script that compares a version of a video file to a master file that has been quality checked and outputs any frames that differ from the master as .jpeg files with timecode ...
0
votes
0answers
14 views
ffmpeg zoompan filter cut short my video
how to use ffmpeg zoompan filter cut short my video
can you help me write code use ffmpeg zoom !
Thanks in advance!
0
votes
0answers
34 views
GUI equivalent for ffmpeg eq filter parameters
I was wanting to know if anyone is aware of a GUI tool that mimics or is similar to the eq video filter parameters in ffmpeg. The eq filter is used to set brightness, contrast, saturation, gamma, etc....
0
votes
1answer
33 views
If I use a normal build of ffmpeg how take advantage of video acceleration for scale?
I generally use ffmpeg for encode in h264 and also resize media
My common command is something like:
ffmpeg -i in.mov -c:v libx264 -preset ultrafast -b:v 5000k -s:v 1280x720 out.mov
I have an ...
0
votes
1answer
17 views
How to apply different filters to different parts of a video using AviSynth?
I have a video file and want to post process it using AviSynth. Different parts of the movie require different filters to be used (noise reduction etc.). How can one use different filters for ...
1
vote
0answers
539 views
How to overlay 2 videos using depth layers
I'm trying to overlay 2 videos which both have depth layers (e.g. how far a pixel is away from the camera) using ffmpeg filters. (I have a few hundred of those videos so I'd like to do batch job out ...
0
votes
0answers
48 views
Why ffmpeg loop filter create consecutive duplicated frames? [duplicate]
I have a simple video here
I try to repeat it as background for other content. So I tried to loop it with the command
ffmpeg -y -r 25 \
-i cover.mp4 \
-filter_complex \
"\
[0:v]loop=loop=3:0:0[body]\
...
1
vote
1answer
203 views
FFMPEG frame extraction
I have couple of video files with sudden transition from black frame to blue frame, both frames have burned-in frame numbers, I would like to use ffmpeg to define the timestamp of this transition in ...
1
vote
1answer
115 views
Why when I overlay a logo on top of the video, the white color part of the logo is transparent?
I overlay using the following command:
ffmpeg -i video.mp4 -i logo.png -filter_complex "[1]geq=r='r(X,Y)':a=0.1[a];[0][a] overlay=x='if(gte(t,2), -w+(t-2)*20, NAN)':y=0" out.mp4
I tried adjusting ...
1
vote
4answers
298 views
Premiere: Make music sound like it's coming from huge speakers?
The problem with my clip:
It was recorded on a fashion show and my recording for some reason stopped, but I quickly restarted it, so approximately 2 seconds are missing. On the visuals, not much was ...
1
vote
1answer
339 views
replace black frames with previous frames
I have problematic footage from diving due to my camera/SD card - every 4th or so frame is just black, and I want to replace all those black frames with either an interpolation between the previous ...
0
votes
1answer
464 views
FFMPEG, Extract first frame and hold for 5 seconds
I'm trying to overlay a 15 second video transition on the beginning of an image sequence (png sequence with an alpha to reveal the image below), which I can do fine with the overlay filter. But I ...
2
votes
1answer
846 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 ...
2
votes
1answer
53 views
Correct “stripes” in VHS record
Recently I recorded my old VHS tapes to my hard disk. There is one thing bothering me concerning the video quality. Whenever the camera moves, the motion produces visible "stripes" in the picture:
It ...
1
vote
1answer
2k views
How to concatenate multiple videos with fades (from- and to-black) in-between?
I recently had the following problem:
I wanted, using ffmpeg, to concatenate several videos (with audio), adding black clips (with null audio) between them , and lastly fade the videos from those ...
0
votes
1answer
1k views
ffmpeg error “Error initializing complex filters”
I use ffmpeg like this:
ffmpeg -i MyOwnSwordsman01.avi -filter_complex "drawtext=fontfile=c:/Windows/Fonts/simsun.ttc: text='第01回 %{pts\:gmtime\:0\:%M：%S}/43：20': x=5: y=466: fontsize=16: fontcolor=...
0
votes
2answers
4k views
How to set pts time format when using ffmpeg filter to add timestamp
I want to add timestamp of current played time to a video, so I use this:
ffmpeg -i video.mkv -filter_complex "drawtext=fontfile=/Library/Fonts/Arial.ttf:
text='timestamp: %{pts \: hms}': x=5:...
0
votes
1answer
347 views
ffmpeg fade to specific color values over time
I have a background image that I'm trying to fade to specific color values using this filter: lutrgb=enable='gte(t,3)':'r=0.3*val:g=0.3*val:b=0.3*val'
This almost works, but it changes the values ...
0
votes
1answer
42 views
Is there an inexpensive way to decompose a video into frames and apply a snapchat-like filter to each frame?
I have a friend who has been taking stop-motion pictures, applying a snapchat "art" filter to each picture, then composing them into video (with pretty awesome results). He is interested in ...
0
votes
1answer
431 views
ffmpeg: concat Results in “Buffer queue overflow” and Short Audio
I have this video file that at one point introduces an async of ~1 second. So I tried to make it work by duplicating a short segment at that point as it's silent there:
$ ffmpeg -i DFW.mp4.mkv -...
0
votes
1answer
1k views
How to improve quality of a WebCam video?
So I started making videos for my vlog on YouTube. It's still a new venture and I'm aware that I need to get myself a good video camera for high quality recordings.
But for now all I have is my ...
0
votes
1answer
176 views
How to load 3D LUTs on Dslr?
There are few film emulation LUTs (LookUp Tables) that I would like to use on my DSLR in real-time (live) because shooting live with LUT applied gives very accurate results and cuts down time on post ...
0
votes
2answers
1k views
What -preset medium stand for in ffmpeg
Here i found
-preset medium
I was wondering for what it stand for is it for video quality ?
2
votes
1answer
1k views
Add semi-transparent box around subtitle
Hey guys how can I add box around subtitle like on picture with ffmpeg
here is mi current command
ffmpeg -i movie.mkv -strict -2 -vf "subtitles=subtitle.srt:force_style='FontName=ubuntu,fontsize=30',...
0
votes
2answers
2k views
“ffmpeg” set fontsize and font
Im trying to set font and font size but i can use only one of the filters not both here is mine command
ffmpeg -i movie.avi -strict -2 -vf subtitles=subtile.srt:force_style='FontName=ubuntu, ...
0
votes
1answer
416 views
mplayer/ffmpeg How to set caca filter's output size
I'm curious how different clips would look like in ASCII art. So I'm trying caca.
To just play, I use mplayer -vo caca $FILE.
But that creates an output of quite small size.
How can I change that ...
1
vote
0answers
480 views
Is it possible to increase video gamma or brightness at container level?
I would like to know if is it possible to increase the brightness or gamma of a video without full re-encoding. For example some versions of ffmpeg allow certain special bitstream filters described ...
0
votes
1answer
397 views
How do I remove excess video duration in ffmpeg when using lavfi?
My goal is to take clips that last over 40 seconds and overlay them on a background, then trim the total time once the clips and background fade out. It works great, except the seeking goes up to 24 ...
1
vote
1answer
906 views
Stack images with “hstack”-filter from video or image sequence in ffmpeg
Is it possible to input a video and extract images every second while simultaneously stack them horizontally or vertically with the "hstack" filter to create one jpg image?
The only way I can figure ...
0
votes
1answer
642 views
Delaying video overlay in ffmpeg without frame drops
I'm trying to play 2 videos overlaid against a static background, with the 2nd video (and its audio) delayed by a couple seconds. When I do this, ffmpeg complains about buffer overflow and the 2nd ...
0
votes
1answer
324 views
FFmpeg: afade plugin, how to specify time 1:55 if colon separates filter parameters? Escape
I want to make a fade out in a video, using the afade audio filter.
Here's my command:
ffmpeg -i VIDEO06.mp4 -c:v copy -af afade=t=out:curve=hsin:st=00:0:30:duration=00:00:10 VIDEO06-faded.mp4
But ...
-1
votes
2answers
26 views
What's the mac software or plugin for filters like those?
I was wondering what software do the professionals use to apply filters like THIS.
Modern series like the ones Netflix is making are another example that use those kind of nice movie filters.
So if ...
1
vote
0answers
88 views
If I limit the color spectrum of a video, will it compress to a smaller file size?
I know that in exporting images, if I use an indexed color format when I save (such as GIF or PNG with indexed color mode), I can dramatically reduce the file size of the resulting export. My ...
4
votes
1answer
3k views
ffmpeg: can I crop using vf while also using filter_complex at the same time?
I have an ffmpeg command using -vf to square crop a video:
ffmpeg -i input.mp4 -vf \
"crop='if(gte(iw,ih),ih,iw):if(gte(ih,iw),iw,ih)', scale=720x720" \
-an -c:v libx264 -profile:v high -level 4.1 \
-...
2
votes
1answer
2k views
ffmpeg concat with or without audio
I'm splitting and merging a single video clip using this ffmpeg command:
-ss 0 -t 1 -i C:\source.mp4
-ss 3 -t 1 -i C:\source.mp4
-ss 6 -t 1 -i C:\source.mp4
-ss 9 -t 1 -i C:\source.mp4
-...
9
votes
1answer
34k views
How to deinterlacing with ffmpeg?
I have the following VOB file:
→ ffmpeg -i input.vob output:
ffmpeg version N-77455-g4707497 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
...
3
votes
1answer
3k views
ffmpeg: pillarbox 4:3 to 16:9
I'm confusing myself over how the video filters work, particularly how they work together, I think. I have two MKVs, pulled from DVD, that are respectively 16:9 and 4:3. What I would like to do is ...
2
votes
2answers
2k views
FFMPEG duplicates the first frame when encoding
Using ffprobe shows that both videos have the same framecount, still if I extract the frames as images the compressed one has an extra frame at the beginning (which is just the duplicated first frame)....
1
vote
1answer
467 views
Accurate audio selection
How do I select the audio corresponding to a set of filter-selected videoframes?
E.g. at the moment I am sampling 1 in every 100 frames of a video (running at 15fps) using the FFMpeg select filter. ...
2
votes
1answer
3k views
Removing / Overlaying logo on mp4 video format with ffmpeg on linux
I'm trying to remove logo from an .mp4 video format with ffmpeg on linux machine without re-encoding (for preserving the same quality) with the following command:
ffmpeg -i input.mp4 -vf delogo=x=270:...
5
votes
1answer
970 views
Video transitions and filters - how to create custom ones?
I am wondering if there is a possibility to do custom video transitions or filters. Like the video spiraling out, little squares appearing, circling out or something like that. Wiping the video out ...
3
votes
1answer
3k views
FFMPEG: Why does the concat filter cause loss of a/v sync/lipsync?
I am doing some tests with the FFMPEG concat filter (DASH experiments), and am seeing that I start losing lipsync after a few concatenations.
Is it expected that one can concatenate independent MP4-...
5
votes
1answer
123 views
Add noise to video while maintaining compressibility
I'm creating a promotion video that has to be uploaded to YouTube and Vimeo.
In post-production (using Final Cut), I've added a noise for aesthetic purposes.
This noise looks really bad on YouTube ...
4
votes
1answer
457 views
Search mpeg / avi frames in linux
I might have an unusual problem for this site; among other duties, I manage the wireless network for a large corporate campus. As part of an upgrade to our wireless access-points, I used a metal ...
1
vote
1answer
8k views
“Video Filter missing” in Adobe Premiere
Adobe Premiere 5.5
OSX
I have a project I've been working on for a while, which has become huge
It has some Adobe After Effects embedded segments in it, as "Dynamic Links."
At some point I had a ...
7
votes
1answer
5k views
What is the ffmpeg filter equivalent of “Automatic levels” for colors?
Looking at the documentation about filters there seems to be a curve filter to manipulate color with the following presets:
color_negative
cross_process
darker
increase_contrast
lighter
...
2
votes
1answer
1k views
ffmpeg filter_complex problem
I'm trying to achieve complex effect with ffmpeg, but I seem to be failing the syntax of -filter_complex somewhere.
The goal is to capture part of the screen (with UScreenCapture direct show device) ...
