Image Processing Toolbox Matlab R2020b on RHEL: Could not read file due to an unexpected error. Reason: Unable to initialize the video properties

Thu Jun 30 16:10:57 UTC 2022

We use Matlab R2020b with the Image Processing Toolbox in a RHEL 7 Bright
Computing cluster on compute nodes, so, e.g., on a Mac, you need XQuartz
and open Matlab via ssh -X. I've been testing starting Matlab with the
'GST_PLUGIN_PATH' path being set as follows:

GST_PLUGIN_PATH=/usr/lib64/gstreamer-1.0;'matlab'

Here are the gstreamer1 RPMs installed:
rpm -qa|grep gstreamer
gstreamer-plugin-crystalhd-3.10.0-11.el7.x86_64
gstreamer1-plugins-bad-free-1.10.4-3.el7.x86_64
gstreamer1-rtsp-server-devel-1.4.5-1.el7.x86_64
gstreamer1-plugins-base-devel-1.10.4-2.el7.x86_64
gstreamer1-plugins-ugly-free-1.10.4-3.el7.x86_64
gstreamer1-plugins-ugly-free-devel-1.10.4-3.el7.x86_64
gstreamer1-plugins-bad-free-gtk-1.10.4-3.el7.x86_64
gstreamer1-vaapi-1.10.5-3.el7.x86_64
gstreamer1-plugins-base-devel-docs-1.10.4-2.el7.noarch
gstreamer1-rtsp-server-1.4.5-1.el7.x86_64
gstreamer1-plugins-base-tools-1.10.4-2.el7.x86_64
gstreamer1-1.10.4-2.el7.x86_64
gstreamer1-devel-1.10.4-2.el7.x86_64
gstreamer1-plugins-good-1.10.4-2.el7.x86_64
gstreamer1-plugins-base-1.10.4-2.el7.x86_64
gstreamer1-vaapi-devel-docs-1.10.5-3.el7.noarch
gstreamer1-rtsp-server-devel-docs-1.4.5-1.el7.noarch
gstreamer1-devel-docs-1.10.4-2.el7.noarch
gstreamer1-plugins-bad-free-devel-1.10.4-3.el7.x86_64

Some of the files in here:
 ls -l /usr/lib64/gstreamer-1.0
total 12564
drwxr-xr-x 3 root root     16 Jun 28 15:18 include
-rwxr-xr-x 1 root root  45632 Mar  9  2017 libgst1394.so
-rwxr-xr-x 1 root root  15736 Oct 17  2017 libgstaccurip.so
-rwxr-xr-x 1 root root  57072 Jun  8  2018 libgstadder.so
-rwxr-xr-x 1 root root  15840 Oct 17  2017 libgstadpcmdec.so
-rwxr-xr-x 1 root root  15872 Oct 17  2017 libgstadpcmenc.so
[...]
-rwxr-xr-x 1 root root  28616 Oct 17  2017 libgsty4mdec.so
-rwxr-xr-x 1 root root  11680 Mar  9  2017 libgsty4menc.so
-rwxr-xr-x 1 root root  15928 Oct 17  2017 libgstyadif.so

The below error suggests Matlab cannot find the appropriate gstreamer-1.0
plugin on a .mp4 file created on a Mac with QuickTime.

Error using VideoReader/initReader (line 734)
Could not read file due to an unexpected error. Reason: Unable to
initialize the video properties

Error in audiovideo.internal.IVideoReader (line 136)
            initReader(obj, fileName, currentTime);

Error in VideoReader (line 104)
            obj at audiovideo.internal.IVideoReader(varargin{:});

Error in Apr12_ColorSampler_MatLAB (line 31)
    videoObject = VideoReader(videoFile);

Here is a gst-inspect to show we have the H264 codec installed:
gst-inspect-1.0 | grep -i 264
rtp:  rtph264pay: RTP H264 payloader
rtp:  rtph264depay: RTP H264 depayloader
videoparsersbad:  h264parse: H.264 parser
typefindfunctions: video/x-h264: h264, x264, 264

Using the sample xylophone.mp4 test file that is built into Matlab check
out these results:

gst-launch-1.0 playbin uri=file:///tmp/xylophone.mp4 video-sink=appsink
audio-sink=fakesink text-sink=fakesink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
DtsGetHWFeatures: Create File Failed
DtsGetHWFeatures: Create File Failed
Running DIL (3.22.0) Version
DtsDeviceOpen: Opening HW in mode 0
DtsDeviceOpen: Create File Failed
Missing element: H.264 (Main Profile) decoder
WARNING: from element /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0:
No decoder available for type 'video/x-h264, stream-format=(string)avc,
alignment=(string)au, level=(string)1.3, profile=(string)main,
codec_data=(buffer)014d400dffe1000b674d400d96540a0f98080401000468ce3c80,
width=(int)320, height=(int)240, framerate=(fraction)30/1,
pixel-aspect-ratio=(fraction)1/1, parsed=(boolean)true'.
Additional debug info:
gsturidecodebin.c(938): unknown_type_cb ():
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0
ERROR: from element /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0:
Your GStreamer installation is missing a plug-in.
Additional debug info:
gsturidecodebin.c(1005): no_more_pads_full ():
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0:
no suitable plugins found:
gstdecodebin2.c(4592): gst_decode_bin_expose ():
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0:
no suitable plugins found:
Couldn't set bcmdec0 to READY

ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

Now on the mp4 file we have:
gst-launch-1.0 playbin
uri=file:///moto/home/rk3199/testMatLAB/ColorSamplingVideo_May23.mp4
video-sink=appsink audio-sink=fakesink text-sink=fakesink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Missing element: MPEG-4 Video (Simple Profile) decoder
WARNING: from element /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0:
No decoder available for type 'video/mpeg, mpegversion=(int)4,
systemstream=(boolean)false, profile=(string)simple, level=(string)1,
codec_data=(buffer)000001b001000001b58913000001000000012000c48d8801952804421463000001b24c61766335372e362e313030,
width=(int)1280, height=(int)528, framerate=(fraction)50/1,
pixel-aspect-ratio=(fraction)1/1, parsed=(boolean)true'.
Additional debug info:
gsturidecodebin.c(938): unknown_type_cb ():
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0
ERROR: from element /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0:
Your GStreamer installation is missing a plug-in.
Additional debug info:
gsturidecodebin.c(1005): no_more_pads_full ():
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0:
no suitable plugins found:
gstdecodebin2.c(4592): gst_decode_bin_expose ():
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0:
no suitable plugins found:
Missing decoder: MPEG-4 Video (Simple Profile) (video/mpeg,
mpegversion=(int)4, systemstream=(boolean)false, profile=(string)simple,
level=(string)1,
codec_data=(buffer)000001b001000001b58913000001000000012000c48d8801952804421463000001b24c61766335372e362e313030,
width=(int)1280, height=(int)528, framerate=(fraction)50/1,
pixel-aspect-ratio=(fraction)1/1, parsed=(boolean)true)

ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

The env variable is still set to:
echo $GST_PLUGIN_PATH
/usr/lib64/gstreamer-1.0

Here is:

pkg-config --variable pc_path pkg-config

/usr/lib64/pkgconfig:/usr/share/pkgconfig

The Matlab script runs just fine on Matlab on a Mac and Windows 10.  Is
there really a missing plugin or does another ENV variable need setting?
Math Works support says this is out of scope from their support, which is
pretty lame as this toolbox clearly isn't working on Linux/RHEL 7.

Here is the xylophone.mp4 file from Matlab
https://drive.google.com/file/d/1bQ8cZ9g9rh7Z2Uu_kL_dqWTGDZeXxoiJ/view?usp=sharing

Thanks,

Rob
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