gstreamer

问题 I am running kinesis_video_gstreamer_sample_app.cpp on MacOS and it streams to AWS Kinesis from FaceTime (iSight) camera. How can I switch the video source to a USB Webcam? Thanks :) 回答1: Ok, I figured it out finally, modify the file kinesis_video_gstreamer_sample_app.cpp as follows. Change: if (data.encoder) { data.source = gst_element_factory_make("autovideosrc", "source"); To: if (data.encoder) { data.source = gst_element_factory_make("avfvideosrc", "source"); g_object_set(G_OBJECT(data

问题 I've written a Gstreamer source plugin, it can produce buffers and transform to downstream elements and do preview. Recently I received a request to implement multi-stream, that one stream to do preview, and the other stream to do recording(using filesink, I suppose). I investigated 'tee' plugin before, but it turns out that it only supports multiple streams with the same formats/resolutions. What plugin should I use if two streams have different formats/resolutions , say, two capsfilters in

问题 I compiled the gstreamer with gst-omx following this tutorial: http://www.onepitwopi.com/raspberry-pi/gstreamer-1-2-on-the-raspberry-pi/ Everything went fine and in the end when i ran gst-inspect-1.0 | grep omx I got: omx: omxmpeg2videodec: OpenMAX MPEG2 Video Decoder omx: omxmpeg4videodec: OpenMAX MPEG4 Video Decoder omx: omxh263dec: OpenMAX H.263 Video Decoder omx: omxh264dec: OpenMAX H.264 Video Decoder omx: omxtheoradec: OpenMAX Theora Video Decoder omx: omxvp8dec: OpenMAX VP8 Video

问题 Im trying to stream video from a Raspberry Pi (on Raspbian) to a Windows 7 PC like in this video: https://www.youtube.com/watch?v=lNvYanDLHZA I have a Logitech C270 connected to the Raspberry Pi, and have managed to stream webcam video over TCP using: gst-launch v4l2src device=/dev/video0 ! \ 'video/x-raw-yuv,width=640,height=480' ! \ x264enc pass=qual quantizer=20 tune=zerolatency ! \ rtph264pay ! tcpsink host=$pi_ip port=5000 from my Pi. Receive this using VLC works, but with a 3 sec delay.

问题 I have an IP camera which is streaming video in MJPEG format. Now my aim is to receive it and display it in my own custom android app. For this I have three programming alternatives on android platform : Using inbuilt Anrdroid MediaPlayer class Using FFMPEG library in native C and accessing it through JNI Using GStreamer port on android to receive the stream So please suggest a better solution? I have no experience with FFMPEG or GStreamer. So what is the feasibility of doing this? 回答1: Use

问题 does anyone know how i would go about using a tkinter window as an output from a videosink/pipeline from within python? i have found methods for lots of other GUI systems, but i dont want to have to use tkinter and something else together xxx thanks in advance x 回答1: This works for me on Windows 32-bit. I get a seg fault on Linux or Windows 64-bit. Sorry, I don't know about Mac. You have to use bus.connect("sync-message::element", on_sync_message) and pass a Tk widget ID ( winfo_id ), as you

问题 I just installed OpenCV 3.0 following this tutorial: http://rodrigoberriel.com/2014/10/installing-opencv-3-0-0-on-ubuntu-14-04/ I didn't encounter any error during the installation process. However, when I tried running the a sample program such as the following, cd cpp/ ./cpp-example-facedetect lena.jpg // (../data/lena.jpg) OpenCV 3.0 beta ./cpp-example-houghlines pic1.png // (../data/pic1.jpg) OpenCV 3.0 beta I get the following error: Processing 1 lena.jpg GStreamer: Error opening bin:

问题 I would like to add metadatas to an MP4 video file with GStreamer: How to do it while recording the file? How to do it when the file is already recorded? Is that possible to check these modifications with GStreamer? For example, with FFmpeg, I can add a title to my video with this command line: ffmpeg -i in.mp4 -metadata title="my title" out.mp4 And then, I check the result with mediainfo: mediainfo out.mp4 回答1: I found a way to do it with a debug plugin: taginject For example, in order to

问题 I am trying to stream a video file using gstreamer from one device to another over RTP. At the sender side I am using the following command : gst-launch filesrc location=/home/kuber/Desktop/MELT.MPG ! mpegparse ! rtpsend ip=localhost But this gives the following error : no element "rtpsend" , I downloaded all the rtp tools and still the same error. Am I using rtpsend in some wrong way? Also can someone give me the command line code for streaming video file(locally stored in my laptop and not