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Questions tagged [video-processing]

Video processing deals mostly with filtering video frames. Most common filters are noise removal, contrast and color modifications. For questions related to trimming and modifying videos use [video-editing], and [video-encoding] for questions related to editing videos into any format.

Video processing is a particular case of signal processing, which often employs video filters and where the input and output signals are video files or video streams. Video processing techniques are used in television sets, VCRs, DVDs, video codecs, video players, video scalers and other devices.

Most common filters are noise removal, contrast and color modifications. Relevant questions should include specific filters.

See also:

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How do I programmatically convert FLV video files to MP4 using a shell script in OS X?

I want to batch convert a directory containing hundreds of FLV files so that each file has a MP4 equivalent. I'm trying to automate this process by writing a shell script and running it from the Terminal. How do I go about doing that? Most of the…
GeneQ
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Video editing API in Android

Does Android have built-in abilities to do video editing? If so, where? I need to get two MP4 videos, and generate one with a nice transition between the videos. Right now, I am sending everything to the server. However, I would love to be able to…
Merc
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How to grab video frames in Qt?

I am new to Qt, I only know the basics: create interfaces and connect slots. In a few words, my knowledge is not deep at all. I need to open a video file and capture all of its frames to get the R, G, B channels and, later on, process optical flow…
Leonardo Lanchas
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MediaMuxer video file size reducing (re-compress, decrease resolution)

I'm looking for efficient way to reduce some video weight (as a File, for upload) and obvious answer for that is: lets reduce resolution! (fullHD or 4K not needed, simple HD is sufficient for me) I've tried lot of ways which should work through lot…
snachmsm
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Is there a way to determine the amount of free video RAM in Linux?

We believe that we are running out of video RAM in a Linux based system that we are working on. We are seeing video & graphic drivers segment faulting with allocation related errors. Are they any tools or techniques that we can use to determine how…
Steve Hawkins
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How to use hardware video scalers?

Modern graphics cards have hardware video scalers, for example as part of AMD Avivo, NVIDIA PureVideo or Intel ClearVideo. For example, AMD's Avivo whitepaper says: "The image output scalers support up to 6 vertical filter taps and up to 10…
Alex I
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Get Image from Video

I am trying to write an application which can access cameras connected to PC, record a video and get an image from the video. I use AForge.NET libraries to access cameras: http://www.aforgenet.com/framework/ I don't know how the event named…
Pepin z Hané
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How to extract slides from a video using python

I have a video training course supplied as AVI files. Most of the screens are shown as slides with a mouse pointer moving around on them. I'd like to capture a screenshot of the slide automatically when the screen changes (ignoring when the image…
zio
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Object Tracking: MATLAB vs. Python Numpy

I will soon be starting a final year Engineering project, consisting of the real-time tracking of objects moving on a 2D-surface. The objects will be registered by my algorithm using feature extraction. I am trying to do some research to decide…
hjweide
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Multiple video sources combined into one

I am looking for an efficient way to do the following: Using several source videos (of approximately the same length), I need to generate an output video that is composed of all of the original sources each running in its own area (like a bunch of…
Oded
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Conversion failed. 2 frames left in the queue on closing ffmpeg

My simplified ffmpeg command (the longer one has over 300 files) is the following. ffmpeg -i "v1.mp4" -i "v2.mp4" -i "v3.mp4" -filter_complex "[0:v:0][1:v:0][2:v:0]concat=n=3:v=1:a=0,fps=fps=30[cv1]; …
AlexZheda
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Android Strip Audio From Video

In my program, it gets MP4 video in, and I want it to output a MP3 (without any server-side stuff.) Since Android (and my app) needs to run on many different hardware configurations, this means I probably cannot use FFMPEG. I know this may be very…
Isaac Waller
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Create Video File using PHP

I have scenario for creating a video files using diff. assets like images, audio file. What I want to do is, Find audio files from the particular folder and set it as background music, and fetch images from particular folder and show those images…
Avinash
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How to convert video on python to .mp4 without ffmpeg?

I need to convert videos to .mp4 format I used to ffmpeg but it converts for too long. Is there are a way to convert video to .mp4 in python without ffmpeg?
Max
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How to get information of dropped frames and resolution of the played video from Video player like VLC

I was playing 360° videos using whirligig player for my subjective test and I was wondering how can I get the information of dropped frames and resolution of video played by the player. The source resolution of the video is 1080p, and the frame…
Ashutosh Singla
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