Questions tagged [filter]
The filter tag has no usage guidance.
0
votes
1answer
18 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
7 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 ...
0
votes
0answers
11 views
Quality improvements on frames captured from videos
I'm trying to capture frames from a video, and use them as photos in a machine learning -based process for some detection. Unfortunately, the frames captured from videos are usually very blurry, shaky,...
0
votes
0answers
29 views
FFmpeg Windows maximum character limit on input
I need to use filter_complex on several files but due to cmd limitation I cannot insert all input files.
This answer helped me a lot but only partially https://superuser.com/a/1200123.
Even using ...
0
votes
0answers
97 views
ffmpeg - 1080i deinterlaces to 1080p 100 fps instead 50
I want to deinterlace my video in 1080i (50 half frames) to 1080p 50fps. I tried this command
ffmpeg -i .\original.mp4 -c:a copy -vf yadif=1 -c:v libx264 -crf 18 -preset ultrafast output.mp4
but ...
1
vote
0answers
170 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
FFmpeg filter_complex: conditionally select overlay source
I'm trying to overlay an image on top of a live video stream.
My filter looks something like this:
[input][canvas]overlay=x=((main_w-overlay_w)/2):y=((main_h-overlay_h)/2)[output]
However, my input ...
0
votes
0answers
45 views
Ffmpeg find loop fragment in video
I found this answer:
Finding the place where a video loops
vut example Gyan not working. I have that error:
Unrecognized option 'filter_complex[0]trim=start_frame=0:end_frame=1[c];[c][0]blend=...
0
votes
0answers
47 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
184 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
56 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
71 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
245 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
0answers
213 views
FFMPEG Split filter and loop skipping frames
I'm overlaying the same HD footage multiple times on a 4K image sequence but I need to offset the start with a holding loop on the first frame. I've been using filters to split and then loop the ...
0
votes
1answer
375 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
563 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
33 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
1k 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
757 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
0answers
104 views
FFMpeg - How to ligten up half of the view (apply gamma filter partially)
I have recorded a video, but due to incorrect physical filter position, about half of the image is darker. I would like to apply a gamma filter to that part. The split is vertical in around 45 % from ...
0
votes
2answers
3k 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
0answers
125 views
ffmpeg video overlays freezing during audio fade
I'm trying to get video overlays and their audio to fade out at different points in time. Before the first overlay completely fades out, both videos freeze, while audio continues. If I remove the ...
0
votes
1answer
305 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
40 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
379 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
800 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
147 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
0answers
668 views
FFMpeg how to add advance filters to Video
How to add advance filters like Snow rain to video using ffmpeg library. I have visited: https://ffmpeg.org/ffmpeg-all.html and https://trac.ffmpeg.org/wiki/FilteringGuide but cannot come to any ...
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
662 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
323 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
399 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
351 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
756 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
590 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
267 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
25 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
76 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 ...
3
votes
1answer
2k 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
-...
7
votes
1answer
28k 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
1k 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
416 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
2k 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
878 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
114 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
446 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 ...
