I'm using below opencv and gstreamer codes to send and receive a video over network. In receiver side I'm getting distorted video and a warning message "Redistribute latency and not enough buffering available for the processing deadline, add enough queues to buffer". I tried 'queue max-size-bytes=900000 max-size-buffer=0 max-size-time=0' but no luck. I'm in windows environment. Any ways to improve the buffer?
Sender
cv::VideoWriter m_videoOut("appsrc ! videoconvert ! x264enc ! video/x-h264,stream-format=byte-stream ! rtph264pay ! udpsink host=192.168.1.200 port=5000 sync=false", cv::CAP_GSTREAMER, 0 , 30, cv::Size(640,480),true);
Receiver
cv::VideoCapture cap("udpsrc port=5000 ! application/x-rtp, encoding-name=H264, payload=96 ! rtph264depay queue-delay=0 ! h264parse ! avdec_h264 ! videoconvert ! appsink", cv::CAP_GSTREAMER);
Related
I am trying to access video frames from a single udpsrc (a camera) across 2 processes using OpenCv VideoCapture.
Process One: A opencv python application which uses the frame to do some image processing.
Process Two: Another opencv python application doing completely different task.
I need to create a videoCapture object in both these applications to access video streams but when I use
cap = cv2.VideoCapture("udpsrc address=192.169.0.5 port=11024 ! application/x-rtp, media=video, clock-rate=90000, encoding-name=H264, payload=96 ! rtph264depay ! decodebin ! nvvidconv ! video/x-raw,format=BGRx ! videoconvert ! video/x-raw, format =BGR ! appsink")
in both the processes only one of them is successfully able to create a cap object.
I came across a "tee" element to create two sinks , but I dont know where and how to implement this.
Can anyone help with this?
I tried creating a gstreamer pipeline using tee element somthing like this:
gst-launch-1.0 udpsrc address=192.169.0.5 port=11024 ! application/x-rtp, media=video, clock-rate=90000, encoding-name=H264, payload=96 ! rtph264depay ! decodebin ! tee name=t \
t. ! nvvidconv ! video/x-raw,format=BGRx ! videoconvert ! video/x-raw, format =BGR ! autovideosink \
t. ! nvvidconv ! video/x-raw,format=BGRx ! videoconvert ! video/x-raw, format =BGR ! appsink
But I have no idea how to use this in VideoCapture().
Hardware:
Apalis IMX8 CPU(SOM)
and
Sensoray model-1012 video frame grabber
I am trying to save analog video with h264 coding and play it.
The code has 3 parts. Reading camera, saving video with coding and playing video with decoding.
The problem i am facing is on decoding part. When i decode and show video it corrupts.
How i read analog video(Works fine):
cap = cv::VideoCapture(" v4l2src device=/dev/video4 ! video/x-raw, format=(string)YUY2, width=(int)720, height=(int)480, framerate=30/1, interlace-mode=interleaved ! deinterlace fields=1 method=2 ! videoconvert ! appsink ",cv::CAP_GSTREAMER);
How i compress and save video(Works fine):
cv::VideoWriter fixedVideo;
QString pipeTmp = "appsrc ! videoconvert ! v4l2h264enc ! h264parse ! qtmux ! filesink location="+ FixedIMG_recordName +" sync=false ";
std::string pipe = pipeTmp.toUtf8().constData();
isOpen = fixedVideo.open(pipe , cv::CAP_GSTREAMER, (double)30, cv::Size(720,480), true);
How i decode and open video(DOESNT Work Fine):
cv::VideoCapture cap_reader;
QString pipeTmp = " filesrc location=" + device + " ! qtdemux ! h264parse ! video/x-h264, width=720, height=480 ! v4l2h264dec ! videoconvert ! appsink ";
std::string pipe = pipeTmp.toUtf8().constData();
cap_reader.open(pipe , cv::CAP_GSTREAMER);
when i open cap_read pipe line to play same video from gstreamer command line pipe it works fine with some warnings. I put the GST_DEBUG output in log.txt Pipe line:
GST_DEBUG=3 gst-launch-1.0 -v filesrc location=test.mp4 ! qtdemux ! h264parse ! 'video/x-h264, width=720, height=480, framerate=30/1' ! v4l2h264dec ! videoconvert ! autovideosink
When i open the video from VLC it also works fine. But when i open the video from VideoCapture and the pipeline that i gave above it corrupts. The corrupted image example.
There is no problem in compression. When you decode mp4 file, you should use "imxvideoconvert_g2d".
Decode pipeline should be filesrc location=" + device + " ! qtdemux ! h264parse ! video/x-h264, width=720, height=480 ! v4l2h264dec ! imxvideoconverter_g2d ! video/x-raw,format=UYVY,width=720,height=480 ! videoconvert ! appsink
I have problem with sending video to youtube using GStreamer.
My pipeline is:
"appsrc name=videoAppSrc ! rawvideoparse name=videoparser use-sink-caps=false format=8 ! videoconvert ! video/x-raw, fromat=YUV, width="+videoWidth+", height="+videoHeight+", framerate=25/1 ! videoconvert ! x264enc key-int-max=60 ! video/x-h264,profile=baseline ! tee name=t t. ! queue ! flvmux streamable=true name=mux ! rtmpsink name=dest location="+this.url+"/"+this.key+" t. ! queue ! matroskamux name=filemux ! filesink name=fileout location="+archFile.getAbsolutePath()+" appsrc name=audioAppSrc ! rawaudioparse use-sink-caps=true ! audioconvert ! volume name=audiovolume volume=1 ! voaacenc ! aacparse ! tee name=ta ta. ! queue ! mux. ta. ! queue ! filemux."
I'm using Java with gst1-java-core to push frames into the pipeline.
After some time I'm getting this kinde of error: Could not write to resource from GstRTMPSink element.
Sometimes it happends after 1 hour, sometimes after 3 hours.
I think the problem is youtube won't receive my stream.
Am I right?
Is something wrong with my pipeline?
Maybe i have to adjust some properties to get this working with youtube propably?
I'm trying to open an IP camera in OpenCV using gstreamer pipleine.
I can open the IPcamera using Gstreamer in terminal, using :
gst-launch-1.0 -v rtspsrc location="rtsp://192.168.0.220:554/user=admin&password=admin&channel=1&stream=0.sdp?real_stream--rtp-caching=10" latency=10 ! rtph264depay ! h264parse ! omxh264dec ! videoconvert ! xvimagesink
Now with this how can I open the same camera in OpenCV videoCapture().
Any help is appreciated.
You can copy the same pipe and use it in VideoCapture (if you built OpenCV with gstreamer modules).
Important point is you need to finish the pipe with an appsink element.
const char* pipe = "rtspsrc location=\"rtsp://192.168.0.220:554/user=admin&password=admin&channel=1&stream=0.sdp?real_stream--rtp-caching=10\" latency=10 ! rtph264depay ! h264parse ! omxh264dec ! videoconvert ! appsink";
VideoCapture cap(pipe);
I'm trying to wrap this working sender side pipeline in the gst-rtsp-serve
gst-launch-1.0 --gst-plugin-path=/usr/lib/x86_64-linux-gnu/gstreamer-1.0/ filesrc location=sample.mp4 ! decodebin name=mux mux. ! queue ! videoconvert ! edgedetect ! videoconvert ! x264enc ! rtph264pay ! udpsink host=127.0.0.1 port=5000 mux. ! queue ! audioconvert ! audioresample ! alawenc ! rtppcmapay ! udpsink host=127.0.0.1 port=5001
Using a complementary pipeline at receiver side all the stuff work and I'm able to send a opencv processed stream, getting it at the client side.
Something is wrong when I try to wrap part of this pipeline in the working example provided along with the gst-rtsp-server.
Infact, editing the test-mp4.c and changing the filesrc input pipelin
"filesrc location=%s ! qtdemux name=d "
"d. ! queue ! videoconvert ! edgedetect ! videoconvert ! x264enc ! rtph264pay pt=96 name=pay0 "
"d. ! queue ! rtpmp4apay pt=97 name=pay1 " ")"
the sender doesn't work anymore. On the receiver side I got a 503 error since the receiver is unable to get the sdp.
Could be this a iussue related to missing bad plugin directory?
I set it in the main Makefile but the problem still persists.
I guess so sinche the rtsp-server works perfectly if I do not edit that line and my pipeline works good either.
Thanks,
Francesco
This looks like it is an issue with the pipeline you have created. Try running your pipeline exactly how it is on the command line, but add fakesink elements on the end to see if that works:
gst-launch-1.0 filesrc location=%s ! qtdemux name=d d. ! queue ! videoconvert ! edgedetect ! videoconvert ! x264enc ! rtph264pay pt=96 name=pay0 ! fakesink d. ! queue ! rtpmp4apay pt=97 name=pay1 ! fakesink
At a glance, it looks like you're demuxing the media, but not decoding the video to a raw format for the edgedetect element.