Hi there,

for the OpenCV tools that enable video read/write operations you can have a look at http://docs.opencv.org/2.4.9/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-videocapture

Regarding the supported video formats (since "raw" video is a bit unclear to me) please check http://answers.opencv.org/question/10741/videocapture-format-supported-by-opencv/  and  http://www.fourcc.org/codecs.php

Thank you all for your reply

I used VideoWriter but it gives me also sigfaults

Mr Sampath Kumar, i don't have  problem with image/video processing in OpenCV so my question is not basic, but i have problem exactly with avi video without codec and it seems to be a bug on OpenCV

http://code.opencv.org/issues/1915

You can change FOURCC field to -1 when you open the video writer.  Then, it will prompt you for the type of output you desire, and you can select the uncompressed video.  Here is the relevant code:

cv::VideoWriter video_out;

video_out.open ( "demo.avi", -1, fps, cv::Size ( wid, ht ) );

if ( ! video_out.isOpened() )

    throw ( std::string ( "Could not open video file for write" ) );

Normally all video sequences are stored in any one of the compressed format.For example .avi and cif or qcif  form. you can select any one of the video converters.

Thank you all for you responses

I found a solution. I move to OpenCV 3.0.0 and I use FFMPEG to create uncompressed videos from frames using this command

ffmpeg -i ./frame%d.png -vcodec png video.avi

Hello,

Ffmpeg is a solution for the creation of uncompressed video using jpgs or pngs, but is there any suggestion to use videowriter class for uncompressed video during runtime like reading rtp packets and saving them as uncompressed avi. If we use file operations for saving each image, we drop some of the frames. Fourcc codec value for uncompressed avi is needed.

Thanks.

Thank you Dear M.B.Coteli for your reply

Hello Assma,

You have used " ffmpeg -i ./frame%d.png -vcodec png video.avi " in ubuntu. How can I do the same in windows? any idea?