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2 votes
0 answers
308 views

How to perform a "lighten only" operation in ffmpeg for prop flicker removal

I have footage shot from a helicopter and I would like to remove the rotor blades. Since the blades are so fast it seems feasible to use the pixel values from the next frame (usually the sky) wherever ...
Adam Honeybell's user avatar
2 votes
0 answers
351 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 ...
Simon Jaquemet's user avatar
1 vote
0 answers
253 views

FFmpeg dnn_processing with tensorflow backend: difficulties applying a dnn filter on an image

I am trying to perform a video segmentation for background blurring similar to Google Meet or Zoom using FFmpeg, and I'm not very familiar with it. Google's MediaPipe model is available as a ...
ArnoBen's user avatar
  • 11
1 vote
0 answers
12 views

How do I control the time of the movie= parameter when overlaying video with video?

The following command overlays main.mp4 with talkingHead.mp4. ffmpeg -hide_banner -i main.mp4 -vf "movie=talkingHead.mp4, scale=400:-1 [inner]; [in][inner] overlay=main_w-(overlay_w+10): main_h-(...
John Smith's user avatar
1 vote
0 answers
786 views

Which FFmpeg variable gives the total duration of a video?

I've spent hours searching the documentation and forums for a simple variable and it's driving me crazy. Can anyone tell me what the variable is that gives the total duration of a video, so that I can ...
Spiritman's user avatar
1 vote
0 answers
130 views

FFmpeg - Loss of video quality when using vf setpts

I created a screen recorder for iOS using FFmpeg. I concat the images into a video which is fine and the quality doesn't change much from the screenshots but when I use setpts to match the video to ...
STerrier's user avatar
1 vote
0 answers
17 views

Is it true that pixelization can be reversed given enough frames?

I just read someone stating the following on a Kdenlive bug report: I'd much rather have a single color than pixelization, since with enough frames, pixelization can be reversed. Simple question - ...
Marc.2377's user avatar
  • 111
1 vote
1 answer
766 views

ffmpeg 4.2.3 freezes in encoding which is extremely slow

I tried to encode some video files, from GOPRO action camera. The whole fuzz is about two specific video files that the video orientation is 180 degree. Therefore, I thought to implement complex ...
Estatistics's user avatar
1 vote
0 answers
306 views

Problems correcting perspective in video using FFmpeg

If I save a frame as a JPG using something like: ffmpeg -i /dev/video0 -frames:0 1 check.jpg I can get the coordinates to create an image with the perspective corrected using: ffmpeg -i check.jpg -...
Nick's user avatar
  • 111
1 vote
0 answers
489 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 ...
Braian's user avatar
  • 11
1 vote
1 answer
327 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 '...
NetherGranite's user avatar
1 vote
0 answers
4k 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 ...
Ondra Žižka's user avatar
1 vote
0 answers
695 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....
John Contoso's user avatar
1 vote
0 answers
866 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 ...
Konstantin's user avatar
1 vote
0 answers
811 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 ...
David Rhoderick's user avatar
0 votes
0 answers
21 views

Integration of FFMPEG filters into Adobe Premiere?

As Premiere allows to integrate third party plug-ins I wonder if there is an integration of free filters used in ffmpeg / libavfilter?
Chris's user avatar
  • 1
0 votes
0 answers
30 views

New ffmpeg build will not concat, gives no error message

At the risk of this being a bug, and not something I'm doing wrong, I'm posting here mostly because I don't even know where to report ffmpeg bugs. It looks like the newest version of ffmpeg ffmpeg ...
user3643's user avatar
  • 2,296
0 votes
0 answers
128 views

FFmpeg select filter does not return frames

I observed a strange behavior while using the select filter. In short, I'm using ffmpeg to detect frozen sections in a video, calculate the exact middle point of these sections, then using filters to ...
Gergely Lukacsy's user avatar
0 votes
1 answer
394 views

How to adjust video histogram using ffmpeg?

I have a dark video and'd like to adjust its histogram. In a graphical editor I've found the values of the color levels that enhance video contrast. How to set this level values in ffmpeg?
Ivan Z's user avatar
  • 101
0 votes
0 answers
238 views

Applying dynamic mask across all images to make uniform with baseline

I do time lapses. In the attached image, notice each image has slightly different shades but are otherwise consistent. This is an artifact of a mechanical shutter. I'd like to take a single pixel in ...
user319249's user avatar
0 votes
0 answers
1k views

Best deinterlacing filter for FFMPEG (no GPU)

I am hoping you can help. I am trying to extract frames (1 per second) from various videos and from various sources. However, I am getting blur/deinterlacing (see below). I've tried with various types ...
Chris Felstead's user avatar
0 votes
0 answers
146 views

can I change ffmpeg crop position at runtime for each frame during stream

I am trying to move an Region of Interest (RoI) around a multi-camera tiled source (which will be too big to encode for smooth viewing), and stream this "live". The RoI is externally ...
leelio's user avatar
  • 1
0 votes
1 answer
1k views

ffmpeg to combine video + alpha video, transparency key with threshold

I have two corresponding video files. One is a regular video and the other is meant to be the alpha channel for that video. I wish to combine them, and use the alpha video to lay a transparency key ...
Stoopkid's user avatar
  • 101
0 votes
0 answers
33 views

Searching an Adjustable Distortion ' filter ' for video

Playing a 720p movie file by VLC-mediaplayer (working normally with all other videofiles), gave a peculiar distortion, intermittently showing rather interesting visually pleasing patternings. Tried ...
Han's user avatar
  • 1
0 votes
0 answers
443 views

Converting/filtering/deinterlacing VHS captures on Linux

I'm pretty much a novice video editor especially on Linux. I'm looking to take a bunch of old home videos I captured using ffmpeg and clean them up as painlessly/automatically as possible. At this ...
John Kuhns's user avatar
0 votes
0 answers
958 views

Sampling and using afftdn with ffmpeg - how with complex filters?

I'm merging together a bunch of videos (30 so far) into a "Brady Bunch" style amalgam using ffmpeg, and I've got that working reasonably well. The last big problem is the background noise. ...
Betty Crokker's user avatar
0 votes
0 answers
960 views

Changing FPS from 29.97 to 30 in ffpmeg creates short blank at end of video, audio is fine

I am trying to merge 5 parts of a continuous video using ffmpeg. For some reason, the 1st part is encoded at 29.97 FPS, while all the others are at 30 FPS. part #1 : 29.97 fps, 29.97 tbr, 19200 tbn, ...
mach128x's user avatar
  • 101
0 votes
0 answers
767 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: ...
BreadEagles's user avatar
-1 votes
0 answers
7 views

Lens/Camera Advice For Shooting High Flying Birds

I am retired, an author, and now novice film maker using iPhone 15 Pro Max to shoot fast moving objects like birds at 5000-10000 ft. I am taking the next step to invest in a dedicated video camera and ...
Geoffrey Howe's user avatar
-1 votes
1 answer
503 views

How can I remove unwanted object from a video and see what's behind it?

If for example I have a video and there is a person that moves but is always partially blocked by an object, can I remove it somehow to get a clear video footage? I tried Adobe content aware Filter, ...
Thomas's user avatar
  • 11
-1 votes
2 answers
30 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 ...
Henrique Nader's user avatar