Unable to determine the codec required.

71 次查看（过去 30 天）
B.k Sumedha
B.k Sumedha 2015-5-23
编辑： cui,xingxing 2023-1-29
I am using 2013a version of matlab and windows xp.When i run the code of videoreader i get this error.So what type of codec needs to be installed.
obj.reader = vision.VideoFileReader('atrium.avi');
obj.videoPlayer = vision.VideoPlayer();
obj.maskPlayer = vision.VideoPlayer();
obj.detector = vision.ForegroundDetector('NumGaussians', 3, 'NumTrainingFrames', 40, 'MinimumBackgroundRatio', 0.7);
obj.blobAnalyser = vision.BlobAnalysis('BoundingBoxOutputPort', true,'AreaOutputPort', true, 'CentroidOutputPort', true,'MinimumBlobArea', 400);

请先登录，再回答此问题。

回答（2 个）

Walter Roberson
Walter Roberson 2015-5-23
编辑：Walter Roberson 2015-5-23
Use mmfileinfo()
info = mmfileinfo('atrium.avi');
and examine
info.video.Format
Also, try
aviinfo('atrium.avi')
and if the command is found in your version of MATLAB (it was scheduled to be removed) then look at the VideoCompression field of the output of it.
Let us know what the results are.
See also https://www.raymond.cc/blog/determine-audio-video-codec-required-to-play-downloaded-movies/ and find a tool for your computer that will tell you which codec was used.
Note: if the codec shows up as Indeo5 then it is not readable with any 64 bit version of MATLAB (which is due to decisions made by the manufacturers of the Indeo5 codec)
  3 个评论
显示 1更早的评论
Walter Roberson
Walter Roberson 2015-5-23
Were you able to use aviinfo()? Were you able to find a program for your system such as one of the ones suggested by the blog link I included?
Image Analyst
Image Analyst 2015-5-23
Can you even play this file with Window Media Player? If you can't even do that, then it's not really a MATLAB question yet.

请先登录，再进行评论。

Mrutyunjaya Hiremath
编辑：Mrutyunjaya Hiremath 2020-4-24
Hello,
To solve the problem, I installed 'Media Player Codec Pack' and use the following code.
vidObj = VideoReader('VideoFile.mp4');
read(vidObj);
get(vidObj)
currFrame = read(vidObj, 10);
vidFrames = read(vidObj,[100 Inf]);
vidFrames = read(vidObj,[18 27]);
The above problem solved in 2014b with 'readFrame' and 'hasFrame' functions.
currAxes = axes;
while hasFrame(vidObj)
vidFrame = readFrame(vidObj);
image(vidFrame, 'Parent', currAxes);
currAxes.Visible = 'off';
pause(1/vidObj.FrameRate);
end
Thank you.
  3 个评论
显示 1更早的评论

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Audio and Video Data 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by