[Bug 791385] New: RGB24: Broken behavior with non multiple of 4 frame width
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Fri Dec 8 10:12:00 UTC 2017
https://bugzilla.gnome.org/show_bug.cgi?id=791385
Bug ID: 791385
Summary: RGB24: Broken behavior with non multiple of 4 frame
width
Classification: Platform
Product: GStreamer
Version: git master
OS: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: gstreamer (core)
Assignee: gstreamer-bugs at lists.freedesktop.org
Reporter: patcherwork at gmail.com
QA Contact: gstreamer-bugs at lists.freedesktop.org
GNOME version: ---
I have been testing some video capture hardware using v4l2src. One of the
devices I am working with can capture in non multiple of 4 widths. While
testing I noticed that RGB24 on a non *4 width, e.g. 1022, would cause the
frame to break. After some further investigation and testing I discovered that
if you input an RGB24 image with an odd format it would break the pipeline. I
would guess that the pipeline is expecting the video to be padded. Below is an
example, I am providing the reference images:
this works:
gst-launch-1.0 multifilesrc location=1024x1024_rgb24_works ! rawvideoparse
format=rgb width=1024 height=1024 ! videoconvert ! ximagesink
this breaks:
gst-launch-1.0 multifilesrc location=1022x1024_rgb24_breaks ! rawvideoparse
format=rgb width=1022 height=1024 plane-strides='<3072>' ! videoconvert !
ximagesink
For v4l2src I am doing the following:
gst-launch-1.0 v4l2src device=/dev/video1 io-mode=1 !
video/x-raw,format=RGB,width=1022,height=1024 ! videoconvert ! ximagesink
For io-mode RW and Usrptr the pipeline is broken, for mmap the pipeline
functions as intended.
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