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Sur d’autres sites (5601)
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opencv ffmpeg vaapi 1080p resolution not working
18 avril 2023, par yeoI want to use hardware acceleration with opencv manual build.
My gpu uses an i965 intel cpu built-in graphics card, and it is a debain11 environment.


[OPENCV:FFMPEG:40] Reinit context to 1920x1088, pix_fmt: vaapi_vld


If you look at some of the error messages below, it seems that the original file is 1920x1080 because it is converted to 1088 while reinit.
I've read that vaapi_vld reads 16 bits at a time.
In fact, it seems to work when the original file is changed to 1920x1072.
Is there a way to fix it without changing the original file resolution ?
Please advise seniors.
Sorry for my poor English skills
Thank you


manual build CMAKE option


"-DCMAKE_VERBOSE_MAKEFILE=ON -DWITH_VA_INTEL=ON -DWITH_VA=ON -DOPENCV_FFMPEG_ENABLE_LIBAVDEVICE=ON -DOPENCV_ENABLE_GLX=ON -DOPENCV_FFMPEG_SKIP_BUILD_CHECK=ON -DWITH_OPENVINO=ON -DWITH_INF_ENGINE=ON"



build infomation


OpenCV modules:
 To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching video videoio
 Disabled: world
 Disabled by dependency: -
 Unavailable: java python2 ts
 Applications: -
 Documentation: NO
 Non-free algorithms: NO

 GUI: GTK3
 GTK+: YES (ver 3.24.24)
 GThread : YES (ver 2.66.8)
 GtkGlExt: NO
 VTK support: NO
 Media I/O: 
 ZLib: /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.11)
 JPEG: /usr/lib/x86_64-linux-gnu/libjpeg.so (ver 62)
 WEBP: /usr/lib/x86_64-linux-gnu/libwebp.so (ver encoder: 0x020e)
 PNG: /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.6.37)
 TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 / 4.2.0)
 JPEG 2000: build (ver 2.4.0)
 OpenEXR: build (ver 2.3.0)
 HDR: YES
 SUNRASTER: YES
 PXM: YES
 PFM: YES
 Video I/O:
 DC1394: YES (2.2.6)
 FFMPEG: YES
 avcodec: YES (58.91.100)
 avformat: YES (58.45.100)
 avutil: YES (56.51.100)
 swscale: YES (5.7.100)
 avresample: YES (4.0.0)
 GStreamer: YES (1.18.4)
 v4l/v4l2: YES (linux/videodev2.h)

 Parallel framework: pthreads

 Trace: YES (with Intel ITT)

 Other third-party libraries:
 Intel IPP: 2020.0.0 Gold [2020.0.0]
 VA: YES
 Lapack: NO
 Eigen: NO
 Custom HAL: NO
 Protobuf: build (3.19.1)

 OpenCL: YES (INTELVA)
 Include path: /home/xxx
 Link libraries: Dynamic load

 Python 3:
 Interpreter: /usr/bin/python3 (ver 3.9.2)
 Libraries: /usr/lib/x86_64-linux-gnu/libpython3.9.so (ver 3.9.2)
 numpy: /home/../include (ver 1.19.3)
 install path: python/cv2/python-3


vainfo


libva info: VA-API version 1.10.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_8
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.10 (libva 2.10.0)
vainfo: Driver version: Intel i965 driver for Intel(R) Haswell Mobile - 2.4.1
vainfo: Supported profile and entrypoints
 VAProfileMPEG2Simple : VAEntrypointVLD
 VAProfileMPEG2Simple : VAEntrypointEncSlice
 VAProfileMPEG2Main : VAEntrypointVLD
 VAProfileMPEG2Main : VAEntrypointEncSlice
 VAProfileH264ConstrainedBaseline: VAEntrypointVLD
 VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
 VAProfileH264Main : VAEntrypointVLD
 VAProfileH264Main : VAEntrypointEncSlice
 VAProfileH264High : VAEntrypointVLD
 VAProfileH264High : VAEntrypointEncSlice
 VAProfileH264MultiviewHigh : VAEntrypointVLD
 VAProfileH264MultiviewHigh : VAEntrypointEncSlice
 VAProfileH264StereoHigh : VAEntrypointVLD
 VAProfileH264StereoHigh : VAEntrypointEncSlice
 VAProfileVC1Simple : VAEntrypointVLD
 VAProfileVC1Main : VAEntrypointVLD
 VAProfileVC1Advanced : VAEntrypointVLD
 VAProfileNone : VAEntrypointVideoProc
 VAProfileJPEGBaseline : VAEntrypointVLD


import os
import cv2

os.environ["OPENCV_FFMPEG_CAPTURE_OPTIONS"] = "hw_decoders_any;vaapi,vdpau" +

cap = cv2.VideoCapture(file_name,cv2.CAP_FFMPEG(cv2.CAP_PROP_HW_ACCELERATION,cv2.VIDEO_ACCELERATION_ANY)) 



error code


[ INFO:0@0.187] global /home/u/opencv-python/opencv/modules/videoio/src/videoio_registry.cpp (223) VideoBackendRegistry VIDEOIO: Enabled backends(8, sorted by priority): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); V4L2(970); CV_IMAGES(960); CV_MJPEG(950); FIREWIRE(940); UEYE(930)
[OPENCV:FFMPEG:40] Reinit context to 1920x1088, pix_fmt: yuv420p
[OPENCV:FFMPEG:40] Trying to use DRM render node for device 0.
[OPENCV:FFMPEG:40] libva: VA-API version 1.10.0
libva: User environment variable requested driver 'i965'
libva: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva: Found init function __vaDriverInit_1_8
libva: va_openDriver() returns 0
Initialised VAAPI connection: version 1.10
[OPENCV:FFMPEG:40] VAAPI driver: Intel i965 driver for Intel(R) Haswell Mobile - 2.4.1.
[OPENCV:FFMPEG:40] Driver not found in known nonstandard list, using standard behaviour.
[ INFO:0@0.228] global /home/u/opencv-python/opencv/modules/videoio/src/cap_ffmpeg_hw.hpp (276) hw_check_device FFMPEG: Using vaapi video acceleration on device: Intel i965 driver for Intel(R) Haswell Mobile - 2.4.1
[ INFO:0@0.228] global /home/u/opencv-python/opencv/modules/videoio/src/cap_ffmpeg_hw.hpp (566) hw_create_device FFMPEG: Created video acceleration context (av_hwdevice_ctx_create) for vaapi on device 'default'
[ INFO:0@0.228] global /home/u/opencv-python/opencv/modules/core/src/ocl.cpp (1186) haveOpenCL Initialize OpenCL runtime...
[ INFO:0@0.228] global /home/u/opencv-python/opencv/modules/core/src/ocl.cpp (1192) haveOpenCL OpenCL: found 0 platforms
File open : ./videoplayback1.mp4
[OPENCV:FFMPEG:40] Reinit context to 1920x1088, pix_fmt: vaapi_vld
[OPENCV:FFMPEG:16] Failed to read image from surface 0x4000014: 18 (invalid parameter).
[ERROR:0@0.245] global /home/u/opencv-python/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp (1575) retrieveFrame Error copying data from GPU to CPU (av_hwframe_transfer_data)
Play video ... size=1920x1080, file=./videoplayback1.mp4
[OPENCV:FFMPEG:16] Failed to read image from surface 0x4000012: 18 (invalid parameter).
[ERROR:0@0.277] global /home/u/opencv-python/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp (1575) retrieveFrame Error copying data from GPU to CPU (av_hwframe_transfer_data)
OpenCV(4.6.0) Error: Assertion failed (!image.empty()) in imencode, file /home/u/opencv-python/opencv/modules/imgcodecs/src/loadsave.cpp, line 976
err = OpenCV(4.6.0) /home/u/opencv-python/opencv/modules/imgcodecs/src/loadsave.cpp:976: error: (-215:Assertion failed) !image.empty() in function 'imencode'



I tried to do video capture by ffmpeg hwacceleration with opencv, but an error message occurred


-
RTP packets detected as UDP
8 juillet 2024, par fritzHere is what I am trying to do :



WebRTC endpoint > RTP Endpoint > ffmpeg > RTMP server.



This is what my SDP file looks like.



var cm_offer = "v=0\n" +
 "o=- 3641290734 3641290734 IN IP4 127.0.0.1\n" +
 "s=nginx\n" +
 "c=IN IP4 127.0.0.1\n" +
 "t=0 0\n" +
 "m=audio 60820 RTP/AVP 0\n" +
 "a=rtpmap:0 PCMU/8000\n" +
 "a=recvonly\n" +
 "m=video 59618 RTP/AVP 101\n" +
 "a=rtpmap:101 H264/90000\n" +
 "a=recvonly\n";



What's happening is that wireshark can detect the incoming packets at port 59618, but not as RTP packets but UDP packets. I am trying to capture the packets using ffmpeg with the following command :



ubuntu@ip-132-31-40-100:~$ ffmpeg -i udp://127.0.0.1:59618 -vcodec copy stream.mp4
ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 the FFmpeg developers
 built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
 configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc
 libavutil 55. 44.100 / 55. 44.100
 libavcodec 57. 75.100 / 57. 75.100
 libavformat 57. 63.100 / 57. 63.100
 libavdevice 57. 2.100 / 57. 2.100
 libavfilter 6. 69.100 / 6. 69.100
 libavresample 3. 2. 0 / 3. 2. 0
 libswscale 4. 3.101 / 4. 3.101
 libswresample 2. 4.100 / 2. 4.100
 libpostproc 54. 2.100 / 54. 2.100 



All I get is a blinking cursor and The stream.mp4 file is not written to disk after I exit (ctrl+c).



So can you help me figure out :



- 

- why wireshark cannot detect the packets as RTP (I suspect it has something to do with SDP)
- How to handle SDP answer when the RTP endpoint is pushing to ffmpeg which doesn't send an answer back.







Here is the entire code (hello world tutorial modified)



/*
 * (C) Copyright 2014-2015 Kurento (http://kurento.org/)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

 function getopts(args, opts)
 {
 var result = opts.default || {};
 args.replace(
 new RegExp("([^?=&]+)(=([^&]*))?", "g"),
 function($0, $1, $2, $3) { result[$1] = decodeURI($3); });

 return result;
 };

 var args = getopts(location.search,
 {
 default:
 {
 ws_uri: 'wss://' + location.hostname + ':8433/kurento',
 ice_servers: undefined
 }
 });

 function setIceCandidateCallbacks(webRtcPeer, webRtcEp, onerror)
 {
 webRtcPeer.on('icecandidate', function(candidate) {
 console.log("Local candidate:",candidate);

 candidate = kurentoClient.getComplexType('IceCandidate')(candidate);

 webRtcEp.addIceCandidate(candidate, onerror)
 });

 webRtcEp.on('OnIceCandidate', function(event) {
 var candidate = event.candidate;

 console.log("Remote candidate:",candidate);

 webRtcPeer.addIceCandidate(candidate, onerror);
 });
 }


 function setIceCandidateCallbacks2(webRtcPeer, rtpEp, onerror)
 {
 webRtcPeer.on('icecandidate', function(candidate) {
 console.log("Localr candidate:",candidate);

 candidate = kurentoClient.getComplexType('IceCandidate')(candidate);

 rtpEp.addIceCandidate(candidate, onerror)
 });
 }


 window.addEventListener('load', function()
 {
 console = new Console();

 var webRtcPeer;
 var pipeline;
 var webRtcEpt;

 var videoInput = document.getElementById('videoInput');
 var videoOutput = document.getElementById('videoOutput');

 var startButton = document.getElementById("start");
 var stopButton = document.getElementById("stop");

 startButton.addEventListener("click", function()
 {
 showSpinner(videoInput, videoOutput);

 var options = {
 localVideo: videoInput,
 remoteVideo: videoOutput
 };


 if (args.ice_servers) {
 console.log("Use ICE servers: " + args.ice_servers);
 options.configuration = {
 iceServers : JSON.parse(args.ice_servers)
 };
 } else {
 console.log("Use freeice")
 }

 webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendrecv(options, function(error)
 {
 if(error) return onError(error)

 this.generateOffer(onOffer)
 });

 function onOffer(error, sdpOffer)
 {
 if(error) return onError(error)

 kurentoClient(args.ws_uri, function(error, client)
 {
 if(error) return onError(error);

 client.create("MediaPipeline", function(error, _pipeline)
 {
 if(error) return onError(error);

 pipeline = _pipeline;

 pipeline.create("WebRtcEndpoint", function(error, webRtc){
 if(error) return onError(error);

 webRtcEpt = webRtc;

 setIceCandidateCallbacks(webRtcPeer, webRtc, onError)

 webRtc.processOffer(sdpOffer, function(error, sdpAnswer){
 if(error) return onError(error);

 webRtcPeer.processAnswer(sdpAnswer, onError);
 });
 webRtc.gatherCandidates(onError);

 webRtc.connect(webRtc, function(error){
 if(error) return onError(error);

 console.log("Loopback established");
 });
 });



 pipeline.create("RtpEndpoint", function(error, rtp){
 if(error) return onError(error);

 //setIceCandidateCallbacks2(webRtcPeer, rtp, onError)


 var cm_offer = "v=0\n" +
 "o=- 3641290734 3641290734 IN IP4 127.0.0.1\n" +
 "s=nginx\n" +
 "c=IN IP4 127.0.0.1\n" +
 "t=0 0\n" +
 "m=audio 60820 RTP/AVP 0\n" +
 "a=rtpmap:0 PCMU/8000\n" +
 "a=recvonly\n" +
 "m=video 59618 RTP/AVP 101\n" +
 "a=rtpmap:101 H264/90000\n" +
 "a=recvonly\n";



 rtp.processOffer(cm_offer, function(error, cm_sdpAnswer){
 if(error) return onError(error);

 //webRtcPeer.processAnswer(cm_sdpAnswer, onError);
 });
 //rtp.gatherCandidates(onError);

 webRtcEpt.connect(rtp, function(error){
 if(error) return onError(error);

 console.log("RTP endpoint connected to webRTC");
 });
 });









 });
 });
 }
 });
 stopButton.addEventListener("click", stop);


 function stop() {
 if (webRtcPeer) {
 webRtcPeer.dispose();
 webRtcPeer = null;
 }

 if(pipeline){
 pipeline.release();
 pipeline = null;
 }

 hideSpinner(videoInput, videoOutput);
 }

 function onError(error) {
 if(error)
 {
 console.error(error);
 stop();
 }
 }
 })


 function showSpinner() {
 for (var i = 0; i < arguments.length; i++) {
 arguments[i].poster = 'img/transparent-1px.png';
 arguments[i].style.background = "center transparent url('img/spinner.gif') no-repeat";
 }
 }

 function hideSpinner() {
 for (var i = 0; i < arguments.length; i++) {
 arguments[i].src = '';
 arguments[i].poster = 'img/webrtc.png';
 arguments[i].style.background = '';
 }
 }

 /**
 * Lightbox utility (to display media pipeline image in a modal dialog)
 */
 $(document).delegate('*[data-toggle="lightbox"]', 'click', function(event) {
 event.preventDefault();
 $(this).ekkoLightbox();
 });


-
RTP packets detected as UDP
28 février 2017, par user3172852Here is what I am trying to do :
WebRTC endpoint > RTP Endpoint > ffmpeg > RTMP server.This is what my SDP file looks like.
var cm_offer = "v=0\n" +
"o=- 3641290734 3641290734 IN IP4 127.0.0.1\n" +
"s=nginx\n" +
"c=IN IP4 127.0.0.1\n" +
"t=0 0\n" +
"m=audio 60820 RTP/AVP 0\n" +
"a=rtpmap:0 PCMU/8000\n" +
"a=recvonly\n" +
"m=video 59618 RTP/AVP 101\n" +
"a=rtpmap:101 H264/90000\n" +
"a=recvonly\n";What’s happening is that wireshark can detect the incoming packets at port 59618, but not as RTP packets but UDP packets. I am trying to capture the packets using ffmpeg with the following command :
ubuntu@ip-132-31-40-100:~$ ffmpeg -i udp://127.0.0.1:59618 -vcodec copy stream.mp4
ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc
libavutil 55. 44.100 / 55. 44.100
libavcodec 57. 75.100 / 57. 75.100
libavformat 57. 63.100 / 57. 63.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 69.100 / 6. 69.100
libavresample 3. 2. 0 / 3. 2. 0
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100All I get is a blinking cursor and The stream.mp4 file is not written to disk after I exit (ctrl+c).
So can you help me figure out :
- why wireshark cannot detect the packets as RTP (I suspect it has something to do with SDP)
- How to handle SDP answer when the RTP endpoint is pushing to ffmpeg which doesn’t send an answer back.
Here is the entire code (hello world tutorial modified)
/*
* (C) Copyright 2014-2015 Kurento (http://kurento.org/)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function getopts(args, opts)
{
var result = opts.default || {};
args.replace(
new RegExp("([^?=&]+)(=([^&]*))?", "g"),
function($0, $1, $2, $3) { result[$1] = decodeURI($3); });
return result;
};
var args = getopts(location.search,
{
default:
{
ws_uri: 'wss://' + location.hostname + ':8433/kurento',
ice_servers: undefined
}
});
function setIceCandidateCallbacks(webRtcPeer, webRtcEp, onerror)
{
webRtcPeer.on('icecandidate', function(candidate) {
console.log("Local candidate:",candidate);
candidate = kurentoClient.getComplexType('IceCandidate')(candidate);
webRtcEp.addIceCandidate(candidate, onerror)
});
webRtcEp.on('OnIceCandidate', function(event) {
var candidate = event.candidate;
console.log("Remote candidate:",candidate);
webRtcPeer.addIceCandidate(candidate, onerror);
});
}
function setIceCandidateCallbacks2(webRtcPeer, rtpEp, onerror)
{
webRtcPeer.on('icecandidate', function(candidate) {
console.log("Localr candidate:",candidate);
candidate = kurentoClient.getComplexType('IceCandidate')(candidate);
rtpEp.addIceCandidate(candidate, onerror)
});
}
window.addEventListener('load', function()
{
console = new Console();
var webRtcPeer;
var pipeline;
var webRtcEpt;
var videoInput = document.getElementById('videoInput');
var videoOutput = document.getElementById('videoOutput');
var startButton = document.getElementById("start");
var stopButton = document.getElementById("stop");
startButton.addEventListener("click", function()
{
showSpinner(videoInput, videoOutput);
var options = {
localVideo: videoInput,
remoteVideo: videoOutput
};
if (args.ice_servers) {
console.log("Use ICE servers: " + args.ice_servers);
options.configuration = {
iceServers : JSON.parse(args.ice_servers)
};
} else {
console.log("Use freeice")
}
webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendrecv(options, function(error)
{
if(error) return onError(error)
this.generateOffer(onOffer)
});
function onOffer(error, sdpOffer)
{
if(error) return onError(error)
kurentoClient(args.ws_uri, function(error, client)
{
if(error) return onError(error);
client.create("MediaPipeline", function(error, _pipeline)
{
if(error) return onError(error);
pipeline = _pipeline;
pipeline.create("WebRtcEndpoint", function(error, webRtc){
if(error) return onError(error);
webRtcEpt = webRtc;
setIceCandidateCallbacks(webRtcPeer, webRtc, onError)
webRtc.processOffer(sdpOffer, function(error, sdpAnswer){
if(error) return onError(error);
webRtcPeer.processAnswer(sdpAnswer, onError);
});
webRtc.gatherCandidates(onError);
webRtc.connect(webRtc, function(error){
if(error) return onError(error);
console.log("Loopback established");
});
});
pipeline.create("RtpEndpoint", function(error, rtp){
if(error) return onError(error);
//setIceCandidateCallbacks2(webRtcPeer, rtp, onError)
var cm_offer = "v=0\n" +
"o=- 3641290734 3641290734 IN IP4 127.0.0.1\n" +
"s=nginx\n" +
"c=IN IP4 127.0.0.1\n" +
"t=0 0\n" +
"m=audio 60820 RTP/AVP 0\n" +
"a=rtpmap:0 PCMU/8000\n" +
"a=recvonly\n" +
"m=video 59618 RTP/AVP 101\n" +
"a=rtpmap:101 H264/90000\n" +
"a=recvonly\n";
rtp.processOffer(cm_offer, function(error, cm_sdpAnswer){
if(error) return onError(error);
//webRtcPeer.processAnswer(cm_sdpAnswer, onError);
});
//rtp.gatherCandidates(onError);
webRtcEpt.connect(rtp, function(error){
if(error) return onError(error);
console.log("RTP endpoint connected to webRTC");
});
});
});
});
}
});
stopButton.addEventListener("click", stop);
function stop() {
if (webRtcPeer) {
webRtcPeer.dispose();
webRtcPeer = null;
}
if(pipeline){
pipeline.release();
pipeline = null;
}
hideSpinner(videoInput, videoOutput);
}
function onError(error) {
if(error)
{
console.error(error);
stop();
}
}
})
function showSpinner() {
for (var i = 0; i < arguments.length; i++) {
arguments[i].poster = 'img/transparent-1px.png';
arguments[i].style.background = "center transparent url('img/spinner.gif') no-repeat";
}
}
function hideSpinner() {
for (var i = 0; i < arguments.length; i++) {
arguments[i].src = '';
arguments[i].poster = 'img/webrtc.png';
arguments[i].style.background = '';
}
}
/**
* Lightbox utility (to display media pipeline image in a modal dialog)
*/
$(document).delegate('*[data-toggle="lightbox"]', 'click', function(event) {
event.preventDefault();
$(this).ekkoLightbox();
});
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