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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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Extract frames from a video using OpenImaj in Java

for (MBFImage mbfImage : video) { DisplayUtilities.displayName(mbfImage.process(new CannyEdgeDetector()), "videoFrames"); I need to extract frames from a video and I'm using Java platform. I'm expecting to use the OpenIMAJ Library to do that. I…
akiaWT
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Recreate AVCHD structure / CPI files from MTS

Yet another question on AVCHD. I've been looking for this for a while now without finding a solution. I've got M2TS files from a Lumix cam. I want to re-create the AVCHD structure where they came from. I can play the M2TS files with VLC, so they…
lopo
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error encoding file with missing audio aac bitstream error

I have a video received from a client that when uploaded into our video processing server(Elemental Server) it hangs and never finishes. The error displayed is: Can't decompress audio. Ignoring packet. osl: [aac @ 0x7f90940031c0]Input buffer…
kandan
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ffmpeg adding play image to thumbnail output

Hey all I am currently able to get a thumbnail capture from my MP4 video by doing the following command line: [Sets Per-file main options time_off start time offset] || [The # of start time offsets] || || [Sets input video file…
StealthRT
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Performing Intra-frame Prediction in Matlab

I am trying to implement a hybrid video coding framework which is used in the H.264/MPEG-4 video standard for which I need to perform 'Intra-frame Prediction' and 'Inter Prediction' (which in other words is motion estimation) of a set of 30 frames…
David Norman
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motion computation from video using pyglet in python

I am writing a simple motion detection program but i want it to be cross platform so im using python and the pyglet library since it provides a simple way to load videos in different formats (specially wmv and mpeg). So far i have the code given…
kuaywai
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Web Video player with API access

Does anyone know web video player which have API to manipulate video output. For example rotate or select just a fragment from full video and play just it? The main task is video editor and we have server side implementation for video manipulation…
Max Grigoriev
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make video from image file using ffmpeg

i have 64 images sequence and i want to make a video using that images. you can download the images here i use ffmpeg in ubuntu. here's my command ffmpeg -r 60 -f image2 -s 1360x768 -i "/home/roylisto/Documents/Tugas Akhir/JAva…
Roy
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TokBox iOS Video conference app performance

I have been building a video conference app with TalkBox platform. My first phase was to check out the performance of the framework. My requirement was video conference call of 6 users. I built up the app with the reference app Multi-Party-Call…
Prashant
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Creating a linear gradient overlay on HTML5

background I have a looping video of some time-lapsed clouds downloadable here. I would like to add a gradient over top of the clouds in real time. I would put live link to code however, video cannot be streamed played with via canvas due to…
Armeen Moon
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Return an array of frames from a video in MATLAB

I have code to capture the frames of a video. I need to put the first 20 frames in an array. How can I do that? Below is the code that I have: filename = 'Wildlife.wmv'; mov = mmreader(filename); % Output folder outputFolder = fullfile(cd,…
salma_magdy
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How to get rid of regular peaks in matlab vision toolbox optical flow?

I'm extracting the optical flow from a video using the Matlab Computer Vision Toolbox (I'm unfortunately not computer-savy enough to use C++ / OpenCV). The optical flow that is computed, peaks at regular time steps of 12 frames (the video is 25…
Marieke
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Writing a greyscale video using Videowriter/avifile

I am writing a function that generates a movie mimicking a particle in a fluid. The movie is coloured and I would like to generate a grayscaled movie for the start. Right now I am using avifile instead of videowriter. Any help on changing this code…
Nitsorn Wongsajjathiti
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Save video with 1.5 playback speed in iOS sdk

I have one recorded video and i want to save it as a new video with 1.5 playback speed(fast-forward) in ios sdk . Can anyone please suggest how can i achieve this functionality? Thanks Yashesh
Yashesh
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Create a thumbnail image every X seconds of the video

hello i have following command to get every second images from video. ffmpeg -i input.flv -f image2 -vf fps=fps=1 out%d.png this command extract whole image every second . i want to get images from specific (x,y) position. for example i want to…
user3807349
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