gstreamer

问题 I have built my own opencv python package from source. import cv2 print(cv2.__version__) prints: 3.4.5 Now the issue I am facing is regarding the use of gstreamer from the VideoCapture class of opencv. I am trying to get this mimimum working example running on python3 cap = cv2.VideoCapture("videotestsrc ! appsink") if not cap.isOpened(): print("Cannot capture test src. Exiting.") quit() while True: ret, frame = cap.read() if ret == False: break cv2.imshow("CVtest",frame) if cv2.waitKey(1) &

问题 I'm writing a C application that uses gstreamer to record audio from a microphone. I want to be able to parse that audio and show a visualization of that audio. I have the following code: #include <gst/gst.h> #include <glib.h> static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data) { GMainLoop *loop = (GMainLoop *) data; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_EOS: g_print ("End of stream\n"); g_main_loop_quit (loop); break; case GST_MESSAGE_ERROR: { gchar *debug;

问题 I have tried to compile the gstreamer ios tutorial #3. I have built the iOS SDK from sources that I have checked out from git, the master tree, and then when I have tried to compile for iOS 9.2. I got the below link error which I have no explanation for. All help is much appreciated. Undefined symbols for architecture arm64: "_gst_plugin_liveadder_register", referenced from: _gst_ios_init in gst_ios_init.o ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with

问题 I have the following pipeline which works fine: gst-launch-1.0 -v filesrc location=/home/Videos/sample_h264.mov ! decodebin ! videoconvert ! autovideosink I want to write a C program to do the same thing. So I translated the previous pipeline to the following code: pipeline = gst_pipeline_new ("video_pipeline"); if (!pipeline) { g_print("Failed to create the pipeline\n"); return -1; } bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); watch_id = gst_bus_add_watch (bus, bus_call, loop); gst

问题 I am trying to stream my webcam via rtmp. I tried to stream data via following pipe line: gst-launch-1.0 -v v4l2src ! 'video/x-raw, width=640, height=480, framerate=30/1' ! queue ! videoconvert ! omxh264enc ! h264parse ! flvmux ! rtmpsink location='rtmp://{MY_IP}/rtmp/live' and it works like a charm. I can see the video on my website. Then I would like to capture frames firstly, and do some process. I streamed processed data by pushing data into appsrc and streaming through pipeline just like

问题 I'm running on an OSX Mac, I've Installed the various packages in GStreamer 1.5.1 found here: http://gstreamer.freedesktop.org/data/pkg/osx/ . Whenever I try to run a command with gst-launch I get -bash: gst-launch-1.0: command not found . Similarly I get an error trying to run gst-inspect . The framework is not present in the /System/Library/Frameworks folder after installation. Any suggestions? 回答1: If you want to run the commands you need to install it from command line: Search for all

问题 Updated to Android Studio 3.0.0 with new android gradle plugin. While buildin project got message: What went wrong: Execution failed for task `':app:externalNativeBuildDebug'`. Expected output file at `gst-build-arm64-v8a/libgstreamer_android.so` for target `gstreamer_android` but there was none but libgstreamer_android.so library file is already there. For native code I use ndk-build. Does anyone have this issue? 回答1: Add to build.gradle file of our android module field targets. android {

问题 I need (almost) real-time audio capturing on Linux with gstreamer . My problem is that I cannot reduce the latency below ~210ms. I tried a simple loopback from mic to headphone: gst-launch-1.0 pulsesrc ! alsasink gst-launch-1.0 alsasrc ! alsasink Both produced the same delay. The latency-time property of alsasrc did not help (it did add the given latency). I could produce the effect I need with pactl load-module module-loopback latency_msec=1 But I could not figure out whether it is possible

问题 I have been working on an application where I use rtspsrc to gather audio and video from one network camera to another. However I can not watch the stream from the camera and thereby cant verify that the stream works as intended. To verify that the stream is correct I want to record it on a SD card and then play the file on a computer. The problem is that I want the camera to do as much of the parsing, decoding, depayloading as possible since that is the purpose of the application. I thereby

问题 I run ./autogen.sh inside the cloned repo and it fails saying the following: configure: No package 'gstreamer-plugins-base-1.0' found configure: error: no gstreamer-plugins-base-1.0 >= 1.14.1 (GStreamer Base Plugins) found configure failed I have gstreamer (base, good, bad and ugly) installed on my Ubuntu. The package name that the build script looks for is gstreamer-plugins-base-1.0 where as the system package is by the name gstreamer1.0-plugins-base . Digging into the autoconf setup I found