pion | Pion Network Library | HTTP library
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kandi X-RAY | pion Summary
C++ framework for building lightweight HTTP interfaces.
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QUESTION
I have some equations which include some parameters and variables. Each variable defines and also exists in other equations. these are my equations:
...ANSWER
Answered 2022-Feb-04 at 00:26The equations as stated are
which can be arranged as a linear system A x = b as follows
which you solve in Matlab as x = A \ b
On further investigation, it seems A is singular since it's 10×8 in size and cannot be inverted. So a least-squares solution is needed where
x = inv(AT* A)* AT b
QUESTION
I am doing a Connect Four in HTML CSS JS and I want to display a token at the top of the grid if you are hover the grid, align to the column so I put a listener to the grid. But to display this I need to go over all the elements at least one time and then after it will display as expected.
Here's the snippet, I'm sorry for the low quality code
...ANSWER
Answered 2022-Feb-11 at 14:27I will try to demonstrate the issue in some bullet points, so let me know if they are not clear enough.
- After the compiling process ends and your page load, there are no listeners attached to the game elements.
- In the first hover iteration, your code will initialize the event listener dynamically but will not execute it.
- After that, you have a listener attached to your element and will fire its callback function from now on.
- So, for every hover event after that, your code will work as expected
SOLUTION
We need to attach the event listener to all game elements statically not dynamically. so here is the JS code we need.
QUESTION
I was learning about the webrtc-stats API spec and was hoping to get the SCTP round trip time. It looks like that is a legitimate thing you should be able to do: https://www.w3.org/TR/webrtc-stats/#sctptransportstats-dict*
I have a pion backend which creates two dataChannels and sends them as part of its Session Description offer. I then answer with JS. Next I tried to get the RTCSctpTransport stats object like this:
...ANSWER
Answered 2021-Oct-07 at 10:50These statistics are not implemented yet. https://bugs.chromium.org/p/webrtc/issues/detail?id=13216 is tracking the implementation for libwebrtc's new sctp stack which may end up exposing them.
QUESTION
I followed this example: https://github.com/pion/example-webrtc-applications/tree/master/sfu-ws
on local is working
I made a linux build, I put it on a server, is working
I put it inside a docker container, it's not working anymore.
On docker I opened the port range:
50000-50200:50000-50200/udp
...
ANSWER
Answered 2021-Aug-28 at 00:23The issue is that Pion (or any WebRTC implementation) is only aware of IP address it is listening on. It can't be aware of all the address that map/forward to it. People will also call this the Public IP
or NAT Mapping
. So when Pion emits it candidates they will probably look like 10.10.0.*
and the remote peer will be unable to contact that.
What you should do is use the SettingEngine and set SetNat1To1IPs. If you know the public IP of the host it will rewrite the candidates with the public IP.
ICE is a tricky process. To understand it conceptually WebRTC for the Curious#Networking may be helpful. Will make sure to answer any follow up questions on SO quickly!
QUESTION
I am trying to send an MP4 video through Pion WebRTC to the browser.
Using FFmpeg, I split it into an Opus OGG stream and an Annex-B H.264 video stream. While the video works fine, the audio keeps cutting in and out. It plays fine for a few seconds, then stops for a second, and continues.
This is the FFmpeg command I use for audio:
...ANSWER
Answered 2021-Aug-19 at 14:55The problem in the end was an inaccuracy in the Sleep time caused by issue #44343 in Go itself. It caused the samples not to be sent at a constant rate, but at a rate that randomly was between 5 and 15ms off, resulting in a choppy stream.
Sean DuBois and me fixed this in the latest play-from-disk
and play-from-disk-h264
examples in the Pion repository by replacing the for
-loop and Sleep()
with a Ticker
, which is more accurate.
QUESTION
I have two different WebRTC clients: an Android device and an angular application. I set up a turn and stun server and both seems to work with the trickle ice tester and the webrtc tester.
As you can see here:
But all ice candidates fail in Firefox when I am watching the candidates in about:webrtc
.
Does anyone have an explanation for this?
More info:
- A similar error occurs in Google Chrome, but the logs are from Firefox because Firefox has better logging.
- The devices are on different networks, so the host request should fail and the turn server is needed.
- The turn server is a coturn turn server, but I also tried it with a Pion turn server and the same result occurs.
- Firfox logs: https://gist.github.com/Nick-v-L/365b7da10039d28a6a23a27fea15df52
- Coturn logs: https://gist.github.com/Nick-v-L/04c3cfc677847e3cdcb7f6b5ca15c743
ANSWER
Answered 2021-Jul-07 at 06:57There was a simple error in my Android app. When receiving an ice candidate from the signaling server I did the following:
QUESTION
Hello to any competent people out there who would stumble upon my post.
I require assistance like never before.
My problem is here:
...ANSWER
Answered 2021-May-14 at 12:12I just figured it out myself:
dup2()
creates a duplicate of the connection's file descriptor into STDIN_FILENO, leaving it open only in stdin after close()
, thus reading stdin with getch
, getchar
or any other functions was basically waiting for the client to send something.
Removing both solved my problem: getch()
now works properly.
QUESTION
I've been trying to fix this for ages,
I've got a program that takes in a random word from a supplied dictionary (txt file), and then adds this word to a vector of strings.
The randomWord() function works as intended, but the getWords() seems to mash-up everything when I try to print out the vector.
The vector declaration:
...ANSWER
Answered 2021-Feb-20 at 06:04There is a very high probability that you're reading in CR characters from a CRLF delimited file, assuming it is just LF delimited, and printing them, where the carriage return will slam the cursor to the left and write over existing text.
You will need to either read this as CRLF or strip out any CR or LF characters.
You can also force a newline:
QUESTION
I was checking out Pion Mediadevices and trying to cross-compile the webrtc example for a rasperry pi zero from my windows computer. When I try to build the example though, I get these errors from Windows command prompt:
...ANSWER
Answered 2020-Dec-03 at 17:29mediadevices currently uses cgo to give us access to camera/microphone and codecs. Cross-compiling in cgo is possible but you would very likely need to cross-compile mmal codec as a static library yourself, but this requires access to the source code.
Unfortunately, mmal is not an open-source library. Therefore, the only option left is to compile the library on the raspberry pi since mmal should be installed on your system already.
Note: I'm the mediadevices author 😃.
QUESTION
I have a list of possible objects that could be 6 or more in length (+6 photons/gammas) and I need to make 3 pairs from this list (3 pions). These pairs need to all have unique objects, and no gamma can be re-used once it is in a pair.
For e.g. if pion1 is made from gamma1 (in the code: ig1) and gamma2 (ig2), then pions2 & pions3 have to be made from all possible combinations of gammas3,4,5,6,etc (it is possible to have more than 6 gammas, but I only care about 3 total pions), and so on.
I attempted to next several for loops in the following manner:
...ANSWER
Answered 2020-Oct-16 at 18:21I would recommend breaking this down into two steps.
- Find all pairs of elements (where order matters).
- Find all combinations of pairs (where order does not matter).
I put together a example program if you want to analyze it.
First thing I did was make a simple Pair
class to track the pairs, compare values, and print them:
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