mmf | Video transcoding ffmpeg frontend in Python | Video Utils library
kandi X-RAY | mmf Summary
kandi X-RAY | mmf Summary
Video transcoding ffmpeg frontend in Python
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Top functions reviewed by kandi - BETA
- Parse command line arguments .
- Initialize the object .
- Compares two Variables
- Validate the file compatibility .
- Find the target file .
- Collapse thousands .
- Convert bit rate to string .
- Extract field from a string .
- Get the integer field from a line .
- Calculate the scaled bitrate .
mmf Key Features
mmf Examples and Code Snippets
Community Discussions
Trending Discussions on mmf
QUESTION
when adding a second memory mapped file to my project the first one no longer works cross processes.
...ANSWER
Answered 2022-Mar-31 at 06:21Turns out garbage collection is the culprit here. To fix this behavior make sure to have a reference to the memory-mapped file for as long as you need the value to be read by other processes.
Why it still worked with only 1 declaration and no reference to the memory-mapped file is a mystery to me.
QUESTION
There are two processes: one written in C++ and the other written in C#.
Simply, C++ process will create a file name "test.dat", map the file to its memory, and keep on writing on it.
C# process on the other hand will open the file and read whenever there is a change on the memory.
The problem is that on the C# end, it does not let me open the file. (IOException saying the other process is in use"
Here is what I've tested.
...ANSWER
Answered 2022-Feb-23 at 06:57FileStream
defaults to only allowing read sharing which is not compatible with how you've opened your c++ file. You need to request write sharing too:
QUESTION
Currently I am working on Named Entity Recognition in the medical domain using Camembert, precisely using the model: TFCamembert.
However I have some problems with the fine-tuning of the model for my task as I am using a private dataset not available on Hugging Face.
The data is divided into text files and annotation files. The text file contains for example:
...ANSWER
Answered 2022-Feb-11 at 11:04Try transforming your data into the correct format, before feeding it to model.fit
:
QUESTION
I often have to work with a text file that serves as input to a scientific model for water quality. The files are pretty long and always have the same named title sections, so it is possible to search them and set marks to be able to easily jump between sections in Vim.
Is it possible to automate the process of creating these marks from .vimrc? So far I have managed to create a macros that searches the section headers and creates the marks automatically when opening these files:
...ANSWER
Answered 2022-Jan-27 at 15:51Record macros using double quotes, this allow you to do things like:
QUESTION
I have multiple cameras in my Windows 11 system and I am wondering how to get all avaiable resolutions for them. I am not intending to make a video capture, but I am willing to just get these properties.
Also, I don't care which API to use, be it DirectShow or MMF (Microsoft Media Foundation). I haven't used any of these before either.
I have found multiple resources doing that in C# (as in here), but similar suggested answers for C++ are hard to understand - some code is given, but what libraries and 'includes' used is not given (as in here)
I have also checked DirectShow samples in hope something would be there, but I didn't find anything.
So, I checked MMF as well (1, 2, 3) and docs, but all posts seem pretty outdated and no full code is given showing how to use certain functions alongside proper 'includes', as trying the code gives me unresolved symbols.
So I am kind of stuck at the moment, I can't find a solution to this.
I would appreciate any help.
...ANSWER
Answered 2022-Jan-14 at 06:17Also, I don't care which API to use, be it DirectShow or MMF (Microsoft Media Foundation). I haven't used any of these before either.
You generally do care because the data might be different.
With Media Foundation, see How to Set the Video Capture Format
Call IMFMediaTypeHandler::GetMediaTypeCount to get the number of supported formats.
You might also want to have a look at Tanta: Windows Media Foundation Sample Projects and sample code there.
With DirectShow, see Webcamera supported video formats in addition to links you found; you will have to sort out includes and libraries through, among SDK samples AMCap does some one this and can be built from source without additional external libraries, from original code or from this fork adopted to most recent VS.
QUESTION
I have a dictionary for a product I have been scraping on this website: https://www.adamhall.com/shop/gi-en/cables-connectors/pre-assembled-cables/microphone-cables/3323/4-star-mmf-1000 I get the image links as a list into a product dictionary, which I want to import into a DataFrame as a cell value in the column images. However, the output makes the data frame have as many rows as there are image links.
Here is my code so far:
...ANSWER
Answered 2022-Jan-04 at 09:36Just enclose your function into a list:
QUESTION
I need to load data of sparse matrix form (MMF) file, then carry out a linear algebra operation on that matrix. The MMF file is in the following form:
...ANSWER
Answered 2021-Oct-04 at 17:17From the documentation of mmread
in scipy
:
https://docs.scipy.org/doc/scipy/reference/generated/scipy.io.mmread.html
scipy.io.mmread(source)[source]
Reads the contents of a Matrix Market file-like ‘source’ into a matrix.
Parameters sourcestr or file-like Matrix Market filename (extensions .mtx, .mtz.gz) or open file-like object.
Returns andarray or coo_matrix Dense or sparse matrix depending on the matrix format in the Matrix Market file.
Scipy should return a sparse matrix, if that is the format of the file.
Try:
QUESTION
I am trying to extract both mass and stiffness sparse matrices from modal analysis using ANSYS 15 software, i used next code :
...ANSWER
Answered 2021-Oct-21 at 07:33I tried running your snippet on ANSYS 2021 R1 and the matrices were not written, but I did not get the stated error. My guess is there was something changed in the order in which *SMAT and *export have to be executed. I can think of two solutions:
1. APDL
I export the matrices like this:
QUESTION
I have this code below that is able to download multiple parts of a file in parallel and writes them using a memory mapped file. The problem is occurring in the DownloadFile()
function. The file is starting downloads properly, but it is getting corrupted along the way. For example, if I try to download a image, sections of it will be corrupted. I'm not sure if this is from some kind of race conduction in the code or if it has something to do with the content range calculations of the parts. Any help on how or were the issue is occurring would be appreciated, thanks!
Minimal, Reproducible Example:
...ANSWER
Answered 2021-Nov-26 at 08:14I figured out the corruption was happening becauase some of the ranges would be bigger than Start-End. I fixed the issue but adding a read-write modifier to both the Memory mapped file and the view stream. Then I changed the size of the view stream to the length of the content returned by the sendAsync request:
QUESTION
I am using a boost::interprocess::deque with a memory_mapped_file as a file buffer that lets data survive reboots etc.
I am creating the buffer like this:
...ANSWER
Answered 2021-Nov-10 at 18:27Firstly: add some peace and quiet to your code :)
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Install mmf
You can use mmf like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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