Harmonic | high performance and scalable RTMP | Video Utils library

by a1q123456 C# Version: v0.0.2 License: MIT

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | Harmonic Summary

Harmonic is a C# library typically used in Video, Video Utils applications. Harmonic has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

A high performance RTMP live streaming application framework.

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Quality

Security

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Support

Harmonic has a low active ecosystem.

It has 136 star(s) with 53 fork(s). There are 17 watchers for this library.

It had no major release in the last 12 months.

There are 14 open issues and 7 have been closed. On average issues are closed in 7 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Harmonic is v0.0.2

Quality

Harmonic has 0 bugs and 0 code smells.

Security

Harmonic has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

Harmonic code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

Harmonic is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

Harmonic releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

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Harmonic Key Features

No Key Features are available at this moment for Harmonic.

Harmonic Examples and Code Snippets

Computes the harmonic mean of a series .

python

Lines of Code : 28

License : Permissive (MIT License)

Copy

def harmonic_mean(series: list) -> float:
    """
    return the harmonic mean of series

    >>> harmonic_mean([1, 4, 4])
    2.0
    >>> harmonic_mean([3, 6, 9, 12])
    5.759999999999999
    >>> harmonic_mean(4)
    T

Create a list of harmonic series .

python

Lines of Code : 26

License : Permissive (MIT License)

Copy

def harmonic_series(n_term: str) -> list:
    """Pure Python implementation of Harmonic Series algorithm

    :param n_term: The last (nth) term of Harmonic Series
    :return: The Harmonic Series starting from 1 to last (nth) term

    Examples:

Calculate the harmonic function .

python

Lines of Code : 15

License : No License

Copy

def harmonic(number: int) -> float:
    """Calculate the harmonic number of the given number.

    Args:
        number (int): input integer

    Returns:
        float: harmonic number

    >>> harmonic(2)
    1.5
    >>> harmon

Community Discussions

Trending Discussions on Harmonic

Different values of a_lm coefficients for different values of Nside in HealPix

Spikes in ADXL335 voltage read from Arduino Uno

Accurate Fractions with Python

Audio samples to musical note detection issue

Tone.js : Getting unexpected results when tweaking synth parameters live (ex. detune, modulation index, attack etc.)

Receiving Bus Error after trying to access data in void * from pipe

How to plot PSD in dBFS?

Making Music with Python

Findpeaks in Spectrum Matalb

Scipy curve fitting unable to accurately fit data to Fourier series

QUESTION

Different values of a_lm coefficients for different values of Nside in HealPix

Asked 2022-Mar-25 at 08:58

I am using HealPix to calculate the outflow rate of particles through a sphere with some radius and I am trying to determine coefficients of spherical harmonics (basically fit some data with spherical harmonics).

The basic steps are:

...

ANSWER

Answered 2022-Mar-25 at 08:58

In order to get the same values of a_lm coefficients it is necessary to normalize values of individual pixels with the pixel surface - dividing with 4*pi/npix.

Another thing, in case it might be helpful to someone. The outflow rate can be easily computed from

Source https://stackoverflow.com/questions/71538092

QUESTION

Spikes in ADXL335 voltage read from Arduino Uno

Asked 2022-Mar-22 at 21:24

Background : I've connected an ADXL335 accelerometer to pins A0,A1,A2 on the Arduino Uno. During the measurement, the Arduino is connected to the laptop via usb, and accelerometer is powered directly by the 3.3V pin on the Arduino. The intention is to read voltage from the accel and plot the corresponding time and frequency spectrum using Python. The overall process is quite straightforward and I'm actually able to achieve this. A snapshot of a signal I recorded is shown below. Arduino code to read/write from the accelerometer and Python code to read from Arduino and construct the plots are provided at the bottom for reference.

The issue I'm facing is with the actual values read by the Arduino (I think).

Problem: There seems to be some noise picked up by the Arduino during the read/write process. To demonstrate this, I ran two separate data acquisitions with the sensor at rest. Snapshots are provided below. I had used a similar system in 7yrs ago in grad school, using National Instruments DAC and LabView. I did experience some noise back then but that was akin to electrical noise ~60 Hz. This one is quite peculiar and I don't know how to deal with it.

Closing: Could someone please help me understand what noise it is, that I'm seeing? Perhaps knowing what this is called will help me research about it in detail and try to tackle it. Any pointers/references would help as well.

Future Scope: I believe that a stable at-rest signal as the first step will greatly help mitigate the offset in Voltage (DC-component in freq-spectrum) even with a simple average. Also, I need to learn how to increase the sampling rate from the uno.

Programs used:

Arduino code to read/write from the accelerometer

...

ANSWER

Answered 2022-Mar-22 at 21:24

This is spike noise. You should use a median filter to clean your signal. It is a digital non linear filter which you can implement in your software.

Just a note: I don't know which sample frequency are you using but the higher is the sample frequency, the more is the collected noise. So, limit the sample frequency to 2 x signal bandwidth (Shannon theorem)

Source https://stackoverflow.com/questions/71578317

QUESTION

Accurate Fractions with Python

Asked 2022-Mar-17 at 09:32

I'm not seeing the mathematical results I'm expecting from the following code, which I believe should produce the Harmonic Series:

...

ANSWER

Answered 2022-Mar-17 at 09:32

You run Fraction(x) where x is a float. This is too late, you already lost precision, so your fraction's precision is as good as that of the float.

Use Fraction in the function:

Source https://stackoverflow.com/questions/71509775

QUESTION

Audio samples to musical note detection issue

Asked 2022-Mar-14 at 09:45

I'm trying to setup a pipeline allowing me to detect musical notes from audio samples, but the input layer where I identify the frequency content of the samples does not land on the expected values. In the example below I...

build what I expect to be a 440Hz (A4) sine wave in the FFTW input buffer
apply the Hamming window function
lookup the first half the output bins to find the 4 top values and their frequency

...

ANSWER

Answered 2022-Mar-14 at 09:45

I think you've misunderstood the M_2_PI constant in your GenerateSinWave function. M_2_PI is defined as 2.0 / PI. You should be using 2 * M_PI instead.

This mistake will mean that your generated signal has a frequency of only around 45 Hz. This should be close to the output frequencies you are seeing.

The same constant needs correcting in your HammingWindow function too.

Source https://stackoverflow.com/questions/71460170

QUESTION

Tone.js : Getting unexpected results when tweaking synth parameters live (ex. detune, modulation index, attack etc.)

Asked 2022-Mar-04 at 12:23

I've been working on a Tone.js synthesizer project for some time now.

For the record I will include the links: Repo Deployment (it is still under development as I am stuck with this issue)

I have encountered a serious issue that I couldn't manage to solve. I use the PolySynth with an FMSynth, but I've had the same issue with all the other synth types that I tried.

Whenever I am trying to tweak the parameters of the synth live (ex. detune, modulation index, amplitude envelope etc.) I get unexpected behaviour:

Most of the times, when I change the value of a parameter, it works at once, thus the sound gets modifidied according to the change I made, but the sound is then stuck to the first modified value, even if I keep changing the value of the parameter.

Then sometimes I get the modified sound every second time I play a note on the synth. One time I get the modified sound and then next time the original sound without any modification, then the modified sound again and so on.

Somestimes it works, but I am still stuck on the first modification.

Sometimes it works randomly, after playing some notes first.

Sometimes it works at once, but then some specific notes produce the unmodified original sound, regardless of my modification (and still the synth stops responding to any further parameter changes).

This is happening with every parameter but volume: volume works as intended every time.

Let's use Modulation index as an example (the same happens with detune, harmonicity and attack - those are the parameters I've implemented for the time being). Originally, I use NexusUI components, but for this I wil be using a regular HTML slider (to prove that NexusUI is not the problem). It can be found in the deployment website I provided and in the repo. This is my code:

In the main JavaScript file, I create the synth and send it to destination:

...

ANSWER

Answered 2022-Mar-04 at 12:23

With the Tone.js instruments, use the .set method for changing properties. You can change multiple properties at the same time, like this:

Source https://stackoverflow.com/questions/71349986

QUESTION

Receiving Bus Error after trying to access data in void * from pipe

Asked 2022-Feb-24 at 23:32

I am currently writing a program to calculate the Lucas Series, Hexagonal Series, and Harmonic Series given a number from an input file. I am using a pipe and shared memory segment to share values across the programs.

I start by creating my pipe

...

ANSWER

Answered 2022-Feb-24 at 23:32

Your problem is that after doing shm_open, doing fstat on the return value shows an st_size value of 0!

Initially, the descriptor from shm_open has zero size. It must be explicitly given a size. Note that just specifying 32 as a length to mmap does not cause the file to be expanded.

This must be done with ftruncate.

After the shm_open call, you need to do:

Source https://stackoverflow.com/questions/71258590

QUESTION

How to plot PSD in dBFS?

Asked 2022-Feb-21 at 11:35

The following code I have written measures PSD of the signal y by taking FFT first.

...

ANSWER

Answered 2022-Feb-21 at 11:35

You can normalize the PSD, thus the maximum of the PSD will be 0dB (if some harmonic is higher than the signal you should adapt the value to normalize):

Source https://stackoverflow.com/questions/71202582

QUESTION

Making Music with Python

Asked 2022-Jan-24 at 04:00

Trying to create some musical notes by combining harmonic series. Very simple code, but the audio turns up blank. Any thoughts?

...

ANSWER

Answered 2022-Jan-24 at 04:00

The sound generated by the code is audible but weak.

I have no experience in audio programming, but some type of noise resembling a loud beep can be generated by the following:

Source https://stackoverflow.com/questions/70828749

QUESTION

Findpeaks in Spectrum Matalb

Asked 2021-Dec-16 at 18:59

I am trying to find peaks in spectrum but I need to extract only peak of base frequency and its harmonics, red rectangular. How to exclude anything before base frequency and only include base frequency and its 3 harmonics. I use this code but it does not help. Any idea?

...

ANSWER

Answered 2021-Dec-16 at 18:59

EDITED to adapt to new code with an example. We are applying on the envelope spectrum of a signal - [ES,F] = envspectrum(sig,Fs);-, so we know the signal and its frequency sampling (fs).

Still being the same process. You can just compute the values in findpeaks() for only those samples of your signal which are higher than 250 Hz. For that purpose, you define a logical array for the frequencies values you want to:

Source https://stackoverflow.com/questions/70324725

QUESTION

Scipy curve fitting unable to accurately fit data to Fourier series

Asked 2021-Nov-30 at 21:37

I am leveraging code from an existing answer. In that answer the signal oscillates around zero. In my data, I am shifted above the x axis however the curve fitting algorithm does not capture that effectively.

...

ANSWER

Answered 2021-Nov-30 at 21:37

You have problem with first coefficient (a[0]), constant. You should not multiply it by cosine. Take a look at wiki.

I am not sure if this scaling (dividing by 2) is necessary in your case, but it is good to follow some conventions:

Source https://stackoverflow.com/questions/70174763

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install Harmonic

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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