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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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Detecting a specific (qualitative) color in video with OpenCV

So: I have this OpenCV program, which captures video from the camera, and displays it on two windows. One has no color detection; the other highlights certain specific colors (such as red). What I need is a way to figure out if the image, at a…
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ffmpeg -itsoffset option has no effect

I want to fix audio sync problems. I looked in MPC-HC that audio should be delayed by 2750 milleseconds. The following two commands ffmpeg -itsoffset +2.750 -i MyFile.avi -vcodec copy -ss 00:28:32 -to 00:29:30 MyFile2.avi ffmpeg -itsoffset -2.750 -i…
Dims
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Codec Not Found

I'm trying to read a AVI file into MATLAB using VideoReader. video = VideoReader('test.avi'); But get this error: The file requires the following codec(s) to be installed on your system: cvid Error in VideoReader (line 147) …
CS Student
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Frames missing while reading video frame by frame in matlab

This code detect faces and crop the faces and stores them in database folder.Face image 11 and 12 are missing in database folder. what is the reason? clc; clear all; %read video file obj=vision.VideoFileReader('basu_converted.avi'); %read frame by…
prash2
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Insert Video Clip in another Video using ffmpeg

I want to insert a video clip in another video at specified position (after n seconds). I am thinking to slice the main video first and then concatenate the pieces again. But this solution is not looking promising to me as what if I have to insert…
ZafarYousafi
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Get frame video with opencv

This is my code to get frame from video. I want to show 2 frame in video with looping and condition. int main( int argc, char** argv ) { string fileName = "E:\\Tugas Akhir\\Video Master\\city_1.avi"; Mat image1; Mat image2; …
Roy
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How can I get a frame from camera stream in Android?

I'm developing a kind of research application for Android. The subtask I'm working on is getting a frame from live video stream from Camera. I tried to get it from SurfaceView source (and decoding YUV -> RGB -> HSV), but the FPS is too low (ca 5-7…
Rachnog
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Queues and Threading: subprocess goes missing

Morning, I am coding a python daemon that needs to convert videos to .mp4 format. To do so, I was planning to use Handbrake via Subprocess, but i'm getting mixed results: sometimes it works, sometimes the process doesn't even show up on top. I am…
João Pereira
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Calculation of arrival time and removal time of each frame?

From a HEVC encoded bit stream how can I get the arrival time and removal time of each frame ? I am trying to get o/p similar to this Any suggestion would be of great help PS: this is the o/p of Elecard's x264 buffer analyzer
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Multithreaded real time camera processing in Android

The goal is to get real-time image processing working on the live preview of an Android device. This has been tackled here on SO many times, and has some mentions on the web (see references at the end of the question), however, I haven't found a…
stav
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Python video editing -- How to trim videos

Is there an easy way to trim a video file in python. If I know the start time and end time, I want to save the new file as multiple shorter files based on input. example pseudo code: function cut_video(original_vid, start, stop): …
Jeff
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OpenCV scorebox detection & extraction

I'm working with OpenCV, and I am trying to extract the score from the scoreboard from a soccer video, and compare score changes to detect goals automatically. what is the best way to do that ? I found that i can use OCR (optical character…
Aboullaite
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Getting the red intensity of every frame of video capture IOS

Okay, so I have this project that I am working on. The task is to measure heart rate using the IPhone/Ipad camera. I am trying the capture the video using AVFoundation, get each frame and sum the red component of every pixel in the frame and divide…
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Decompressing AVI file using DirectShow filters

I am trying to decompress an AVI file using DirectShow filters. Here is the graph I am building. File Reader -> AVI Splitter -> AVI decompressor -> SampleGrabber ->AVI Mux -> File Writer I am suing SampleGrabber to report progress of conversion,…
ata
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Java: Draw Lines on a JMF Lightweight_Rendered Player

I've got a problem: I have a JMF-Videoplayer in my application and I want to draw on it (while the video continues). The Problem I've got is that I use a JLayeredPane where I add the VideoPlayer-Control on Layer.Content_Layer(index 0) and a JPanel…
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