MATLAB: VideoReader support for 10-bit h.264 MP4 files

MATLABvideoreader 10-bit/channel mp4 h.264

When reading a 10-bit h.264 in mp4 container from the GH5 with VideoReader (2016b) I seem to get a good-looking file, but it is only displaying 8 bits and BitsPerPixel=24 – is there a different approach that can be used for reading these files and preserve the full bit depth?

Best Answer

videoReader does not support reading 10-bit H.264 MP4 files. Hence, the data is rescaled to 8-bit. There is no workaround currently available for this issue.

Related Solutions

MATLAB: Is it possible to use AVIREAD in 64-Bit Windows & MATLAB on AVI files created in 32-Bit Windows & MATLAB

A codec is the instructions for decoding (or encoding) video files from (or to) disk. Once a file is written to disk, it can be read by any codec that can be used by the application. MATLAB can read video files created by either 32-bit or 64-bit applications if the proper codec installed. For example, a 64-bit codec must be installed to read or write files in 64-bit MATLAB on 64-bit systems. However, if you wish to read or write a video file in 32-bit MATLAB on 64-bit systems, a 32-bit codec must be installed on the 64-bit system. Verify if the appropriate codec is installed. A list of video codecs installed in Windows can be viewed by clicking Start -> Programs -> Accessories -> System Tools -> System Information -> Components -> Multimedia -> Video Codecs.

As of MATLAB R2007b, MMREADER has been introduced to support more video file formats. Consider using MMREADER in replace of AVIREAD.

MATLAB: Do I get an errorWithFileClose error when I use AVIREAD in MATLAB 7.8 (R2009a) on Linux

The video file is a 16 bit AVI file, which is not the most conventional kind of AVI file. Most AVI files are 8 bits per channel or 24 bpp.

Although this file can be read with MMREADER on Windows, AVIREAD and MMREADER fail to read this file on Linux. This is because GStreamer on Linux does not have the appropriate plugin to read this kind of AVI file. This a limitation of the GStreamer plugin.

A workaround is to use MMREADER on Windows to read this file and write it out as an uncompressed AVI file with 8 bits per channel. Then you can read that uncompressed AVI file on your Linux machine.

Here is an example of the conversion code to be run in Windows:

% Read in AVI file and get frames
readerobj = mmreader('bit16avi.avi', 'tag', 'myreader1');
vidFrames = read(readerobj);
% Get the number of frames
numFrames = get(readerobj, 'numberOfFrames');
% Add frames into a MATLAB movie
for k = 1 : numFrames
      mov(k).cdata = vidFrames(:,:,:,k);
      mov(k).colormap = [];
end
% Play movie in MATLAB
movie(mov);
% Save movie as AVI file to be read in Linux
movie2avi(mov,'output.avi','compression','none');

Best Answer

Related Solutions

MATLAB: Is it possible to use AVIREAD in 64-Bit Windows & MATLAB on AVI files created in 32-Bit Windows & MATLAB

MATLAB: Do I get an errorWithFileClose error when I use AVIREAD in MATLAB 7.8 (R2009a) on Linux

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