Questions tagged [filter]
The filter tag has no usage guidance.
86
questions
0
votes
1answer
38 views
FFMPEG - Scroll filter on filter_complex applies on under layer
I apply filter_complex to put objects on coordinates using overlay. Sometime, I need to use the scroll filter.
Here is the code
ffmpeg -vsync 0 -i /tmp/2SN92agDIG.png -i /tmp/TogmpB9etD.png -i /tmp/...
-1
votes
0answers
26 views
How to fine tune hqdn3d parameters on ffmpeg
I'm trying to reduce noise on an old film, and I did get good results with this:
ffmpeg -i input.mp4 -filter:v hqdn3d=3 output1.mp4
ffmpeg -i output1.mp4 -filter:v hqdn3d=3 output2.mp4
ffmpeg -i ...
0
votes
1answer
19 views
blend filter and color
Trying to debug blending images over video led to this observation:
ffmpeg -i https://lh3.googleusercontent.com/vt1VzlKCpjJjxRGBd3oAVgOHau22m2257fDBaW3KfHsNbhOcw1--...
0
votes
0answers
64 views
ffmpeg dynamic filter values from piped input
I need to run an audio filter on a piped input using its own lufs value as a variable, without writing to disk.
I previously bounced the piped input to processedaudio.wav and the command works as:
...
0
votes
1answer
52 views
ffmpeg blend mode multiply results in green overlay
i'm trying to overlap two video clips using FFMpeg. I'm using the following command:
ffmpeg -i a.mp4 -i b.mp4 -filter_complex "blend=all_mode='multiply'" c.mp4
I was expecting to get something like ...
0
votes
1answer
115 views
Combine -vf yadif,format=yuv420p and -filter_complex for watermark
I have an ffmpeg command using -vf to deinterlace videos and produce pixel format with 4:2:0 chroma subsampling:
ffmpeg -i input.mp4 -vf yadif,format=yuv420p \
-force_key_frames expr:gte(t\,n_forced/...
0
votes
1answer
25 views
Remove deadair periods in video
I am doing a video recording for a powerpoint presentation, and sometimes I have some seconds of (idleness) during the recording (where there is no change in the presentation nor speaking audio). For ...
1
vote
1answer
23 views
Fixing flickring old video
I have a bunch video that looks like it's flickering. The video started as Super8 (70s), was converted to VHS some years ago (90s?), and was recently converted to AVI. It looks something like this
...
0
votes
0answers
14 views
Deskew/Perspective transform filter for video
I’d like to correct the perspective on a slide show taken from a side seat in a theater, where slides and video were projected on a screen. I’d like to crop it and deskew just to display the screen ...
1
vote
3answers
197 views
Replace all completely black frames with interpolated frames
Due to a bug with Nvidia Shadowplay, I have a bunch of videos that look like this. A bunch of random frames have been replaced with pure black frames.
I'd like to fix one of these videos to remove ...
0
votes
1answer
47 views
ffmpeg - Make a white line look thicker
I've been actively playing around with ffmpeg for the past few days, and now I want to make an audio visualiser, just with the showwaves filter (I made it white using p2p mode, and I don't want to use ...
0
votes
1answer
211 views
ffmpeg - get green overlay instead of red when using multiply?
multiply should result in a darker image according to this website. However every multiply options with input that I'm using resulted in darker green videos instead of layering it with colour that I ...
0
votes
1answer
257 views
Is there a high-pass filter for videos in Adobe Premiere Pro?
What I want to do is putting in high-pass filter effect on each image constituting a video by using Adobe Premiere Pro 13.1.2.
Premiere Pro has a high-pass filter for audios but it does not have a ...
0
votes
1answer
30 views
Video player with motion blur or frame averaging
I here would be a good place to ask, I apologize if Im mistaken.
I am looking for a video player that can add motion blur to videos or that can insert an average frame in between two frames.
The ...
0
votes
0answers
83 views
How drop still frames with timestamp ffmpeg
I have a ffmpeg command that allows me to drop duplicate frames and speed up the video and works well. I use it with hundreds of video recordings from a surveillance ip camera that does not have ...
2
votes
1answer
171 views
Combining two video fields into one (to create an interlaced video)
I have two separate video fields (top.avi and bottom.avi) and I would like to merge them to create an interlaced video.
Is it possible to do this with ffmpeg? (or any other tool for Windows or Linux)
...
0
votes
1answer
62 views
How to lower number of parameters passed to ffmpeg
I am processing video with FFmpeg. I am trying to add image overlays at certain times. I have command something like this:
ffmpeg -i video.mp4 -i img_a.png -i img_xx.png -i some_third_image.png -i ...
0
votes
0answers
145 views
FFmpeg afade produces horrible audio quality
I'm trying to add a video and audio fade in and fade out to my video using the fade and afade filters. I'm using the following command:
ffmpeg -i trimmed.mp4 -vf 'fade=in:0:60,fade=out:2940:300' -af '...
1
vote
0answers
926 views
What's wrong with VLC seeking and/or MKV created by ffmpeg?
I have creeated a video using FFmpeg. It is a result of putting 4 videos together, tiled, using -filter_complex with overlays.
Following the how-to here, I have it created as MKV.
When playing this ...
1
vote
1answer
10 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
231 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:...
2
votes
0answers
42 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 ...
1
vote
0answers
206 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
138 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
2answers
77 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
971 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 ...
1
vote
1answer
277 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
448 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
1k 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 ...
2
votes
1answer
793 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
924 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
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 ...
3
votes
1answer
98 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
4k 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
2k 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=...
1
vote
2answers
7k 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
522 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
46 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 ...
1
vote
1answer
569 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
3k 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
213 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 ...
1
vote
2answers
3k 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
2k 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
4k 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
689 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
563 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
572 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
1k 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 ...
1
vote
1answer
948 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
478 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 ...
