[Bug 783945] New: gst-launch -e flag causes usb camera disconnection (Logitech C920)
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Mon Jun 19 05:44:43 UTC 2017
https://bugzilla.gnome.org/show_bug.cgi?id=783945
Bug ID: 783945
Summary: gst-launch -e flag causes usb camera disconnection
(Logitech C920)
Classification: Platform
Product: GStreamer
Version: 1.12.0
OS: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: gstreamer (core)
Assignee: gstreamer-bugs at lists.freedesktop.org
Reporter: tt.babyvitals.01 at gmail.com
QA Contact: gstreamer-bugs at lists.freedesktop.org
GNOME version: ---
Created attachment 354015
--> https://bugzilla.gnome.org/attachment.cgi?id=354015&action=edit
gst-launch & -e flag issue: command line output
So far, this issue seems to be specific to the Logitech C920 USB camera when
using gst-launch on the command line.
After I use the "-e" flag in any pipeline, any subsequent pipeline that access
the camera will fail and cause a camera disconnection, where it becomes
necessary to re-plug the camera to make it usable again. Removing the -e flag,
avoids the issue, but the video file is saved without an index and is not
readily usable.
Also, take the following pipeline:
$ gst-launch-1.0 -e v4l2src device=/dev/video1 ! autovideosink
It has different behaviors depending on how I stop it:
- If I send SIGINT (Ctrl-C) on the terminal, the issue occurs.
- If I close the window created by autovideosink, the issue _doesn't_ occur.
These different behaviors make me thing this is not a driver issue, but
something not being handled properly within gst-launch.
This is my system configuration:
$ uname -a
Linux NUC02 4.4.0-79-generic #100-Ubuntu SMP Wed May 17 19:58:14 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
$ gst-launch-1.0 --version
gst-launch-1.0 version 1.12.0
GStreamer 1.12.0
Unknown package origin
- OS is Ubuntu 16.04
- Issue also happens with GStreamer 1.8.3
- Already asked in the mailing list, but didn't have any
luck:http://gstreamer-devel.966125.n4.nabble.com/gst-launch-e-flag-causes-usb-camera-disconnection-tt4682150.html
- Attached is the console output using the -v flag
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