ifmt | Inline expression interpolation for Rust
kandi X-RAY | ifmt Summary
kandi X-RAY | ifmt Summary
A small crate which brings inline string interpolation to rust's standard formatting macros.
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QUESTION
I need to call the GetVersionExA function from the program written on masm
. it accepts a single parameter lpVersionInformation
of the type LPOSVERSIONINFOA
. Where LPOSVERSIONINFOA
as i suppose is the instance of _OSVERSIONINFOA struct.
So i wrote this simple program but got following error:
ANSWER
Answered 2020-Sep-27 at 18:56LPOSVERSIONINFOA
is a pointer to an OSVERSIONINFOA
. So, just as wsprintf()
takes the address of an allocated char[]
array to write into for returning its output string, GetVersionEx()
takes the address of an allocated OSVERSIONINFOA
to write into for returning its version data.
Also, you need to set the OSVERSIONINFOA.dwOSVersionInfoSize
field before calling GetVersonEx()
, so it knows whether you are passing it the address of an instance of OSVERSIONINFOA
or OSVERSIONINFOEXA
(which have different sizes and fields).
QUESTION
I'm a college student and I am studying FFmpeg now.
I have wrote a software that can record desktops and audio('virtual-audio-capturer') with FFmpeg.And I am now writing Audio and Video Synchronization. I met some problems that video recording plays too fast.
When I look for audio and video synchronization help on the Internet,I find a formula for calculating PTS :
pts = n * ((1 / timbase)/ fps)When I use this formula,I find a phenomenon.
1.The higher frame rate is,the faster the video playback speed.
2.The slower the frame rate, the faster the video playback.
Also I find while the framerate is 10,the video playback speed will be right.
Why has this situation happened?I have thought this question for three days. I really hope someone can help me solve this problem.
I really appreciate the help.
...ANSWER
Answered 2019-Apr-15 at 08:54Finally, I found out the reason for the problem.
The frame rate of video generated by video recording is determined by the recorded video stream.My computer's maximum frame rate for gdigrab is 10 frames,so if I set it more than 10 frames, the playback speed will be fast.And if i set it less than 10 frames, the playback speed will be slow.But i run code on my computer where I play games.Whatever i choose 10 frames or 15 frames,the palyback speed will be correct.
Still,i don't know the reason why my gdigrab's framerate is only 0-10 frames.There are a number of factors that affect the frame rate of video recording,such as CPU Graphics, card,display and Memory.
Here is the final code capture screen and audio with FFMPEG
QUESTION
I am using VS2015 to develop and need insert items into a CListCtrl object. I use InsertItem() to add the new item at the end of the list. Below is my code
...ANSWER
Answered 2017-Mar-28 at 03:51The LVS_REPORT
style is normally used when there is a need to display the items in a sortable fashion. Using this style may result in the list control having a CHeaderCtrl
upon which one could click to sort the list items.
If sorting is not desired, and if there's no need to display a column header, you might want to not use the LVS_REPORT
style. Choose something like LVS_LIST
style instead.
If a column header is desired, but no sorting is required, you might want to disable the sorting properties of the control by doing something like:
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