AVIREAD unable to locate decompressor when H264 codec is present

Old file ran on R2009A/WIN 32 will not run R2009A/ WIN64 using 'AVS Video Remaker' converted file to H.246. Using video = uigetfile ('*.avi') and then info = aviinfo(video) info.VideoCompresion = H264

Using GSpot I confirm that the H264 codec is present.

However using aviread(video) I get error Unable to locate decompressor. I can display the file on several other programs including 'Windows Media Player'

What is the problem? How do I solve it. PS I have read all of the threads posted on this issue.

Answer 1

[Onomitra Ghosh]

It may be the case the H.264 decoder present is a 32 bit version and not 64 bit one. Windows Media Player (and many other applications) on win64 is a 32 bit application and hence is able to play it fine.

Answer 2

[Walter Roberson]

H.264 was not supported until R2011b (I think it was.)

[Richard]

does this mean I can not read the video on R2009A/64? Or I just have to find the correct codec?

[Walter Roberson]

Until R2011b you have to use a two-stage process, as best I have been able to puzzle out. One of the stages consists of running a Windows program that can understand h.264, and the second stage consists of transferring the images from the Windows program to MATLAB.

The archived discussions are a bit murky, and it could be that what I am describing only applies to _streaming_ video rather than video already available in a stored file.

[Richard]

Thanks! That is what I am doing for a work around but do not like it. I read the file and convert it to wmv and then read it. So I am changing my program from avi read to mmreader. Nothing is simple any more.

[Avner Atias]

Hi Richard,

How do you convert h.264 to wmv?

Thanks,

Avner