C++ :: Reading MPEG Video File
Oct 28, 2013
I have been working with video files and my task is open a video file, get it copied into another file and then changing into binary format. after getting few bits inverted, changing back it into ascii formats. Original video contains normal and extended ascii codes. Unfortunately, i got stuck at first step, whole video file is not being copied. i have written a piece of code that copies the whole word/ any text file but the video file is not fully copied as just 5KB out of 119,659 KB are copied.
Code: #include "stdafx.h"
int _tmain(int argc, _TCHAR* argv[]) {
FILE *fp1,*fp2;
char c;
fp1 = fopen( "sample.mpg", "r") ;
fp2 = fopen("result.txt","w");
[Code] ....
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Apr 3, 2012
I have this image/video compression project that is to be done in C. I've been given this source code by my supervisor which is supposed to be a working one.
Assuming I have a sequence of 5 images in .pgm format (image41.pgm, image42.pgm .... image45.pgm). Some of the code involved is
Code:
#define START_FRAME 41
#define END_FRAME 45
#define SKIP_FRAME 1
#define INPUT_STRING "/home/folder/image%03d"
int main(){
int frameNo = START_FRAME
nx=1920, ny=1080;
char fileName[128];
[Code] ....
When I tried to compile the code using make file (shell script), I got this error message "In function 'readPgm' format '%d' expects argument of type 'int *', but argument 3 has type 'unsigned char *' "
Can identify what the problem is and how to rectify it?
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Dec 11, 2012
I am creating small application using c#.net.I removed all image tag using regular expression no I want to remove all video file and flash file also in source code of webpage.
so far I have tried this ...
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
[Code] .....
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Jan 23, 2014
I making a application which convert video to audio in MFC. i want make it without using FFMPEG . How can it possible.
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Jul 2, 2014
Basically i'm willing to create an application which could share Video,Mp3 Over the internet to my friends.
For suppose I'm hosting file on my PC, and i want to share "D" Drive to my friends but they aren't connected to my network locally. i want to share movies over the internet using a host and client application in c#.net.
the purpose of this application is very clear that that i want to share movies over the internet and they have to be able to watch movies on their PCs Except running my PC remotely.
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Oct 9, 2013
I am working on H.264 encoder. How to open a binary file using c, i have tried and have got zero errors but end result its not opening....
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Sep 7, 2014
I'm looking to convert audio, images, video to base64 in c++, and through many searches on the web I've only seem to come up with string > base64.
When I view a .mp3 file for example, there are many characters there that are not available to be used in my string to encode.
[URL] ....
I have this code set up in my project, and all I want is to be able to give the location of any file and have it encode (could just encode to a string, I can handle writing it to a file), and then give a location to put the decoded file as well.
I'm not sure exactly where to even start.
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Nov 26, 2013
Program background: Ticket Sales Details You will sell tickets in advance and at the door. Prices for buying in advance and at the door will be given. Also, the total number of tickets sold in advance will be given. Each guest will have a unique number. If there are n tickets sold in advance, then these guests will be numbered 0 through n-1. As the event starts, requests to buy tickets at the door may be made and these guests will be numbered sequentially, starting at the lowest unassigned number. The maximum number of guests will be 1000. The first line of the file contains the following three values, separated by spaces: Cost of the presales tickets (in dollars), Cost of the tickets at the door (in dollars), and the number of presale tickets. The first two values will be positive real numbers to two decimal places and the last will be a positive integer.
The second line of the file will contain one positive integer representing the number of auction items followed by a positive real value to two decimal places (at most) representing the minimum bid increment, in dollars. The first value is guaranteed to be 1000 or less and the second will be in between 1 and 50, inclusive.
The third line of the file will contain all the prices of the auction items, in dollars, separated by spaces, in order. Thus, the first price is the price of item 0, the next price is the price of item 1, and so on. These values will be real numbers represented to up to 2 decimal places.
The fourth line of the file will contain the three following positive integers pertaining to the raffle: the number of raffle tickets available, the cost of a raffle ticket in dollars, and the number of raffle prizes. (It's strange to have raffle tickets that don't cost a whole number of dollars.)
The fifth line of the file will contain each of the values of the raffle items, in dollars, separated by spaces, in order. Thus, the first price is the price if item 0, the next price is the price of item 1, and so on. These values will be real numbers with upto 2 decimal places.
The sixth line of the file will contain ten positive integers representing the number of each of the drinks 0 through 9, in order, that are in stock.
The seventh line of the file will contain ten positive real numbers with upto 2 decimal places representing the price of each of the drinks 0 through 9, in order.
The eighth line of the file will contain a single positive integer, numEvents, representing the number of events that occur at the charity ball. These events are split into two groups: actions by guests at the ball and awards given (raffle, auction, person, totalrevenue). All of the actions precede all of the awards. You will produce exactly one line of output for each event described. Here are the formats of each event that could occur:
If a patron buys a ticket at the door, a command will be on a line by itself:
BUY TICKET k
where k is a positive integer indicating the number of tickets bought at the door. These guests will be numbered as previously mentioned. You are guaranteed that the total number of tickets bought, including presales, will not exceed 1000. This is what I have so far and I cannot figure out why it wont calculate the total revenue. I am not completely sure if it is even accessing the if statement in main.
Code:
#include <stdio.h> #include <stdlib.h>
#include <string.h>
#define N 1000
[Code].....
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Apr 5, 2014
is is possible to put a video in your c++ game using allegro 5?before starting the game................
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May 20, 2013
I would like to create a video game. It would be text based. How could I set up a save system? Also, how would I load it?
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Apr 2, 2014
I've been wondering if there's a function or procedure used to know the current video mode. An example of how this was done in Pascal:
function VideoMode : integer;
begin
if (lastmode = BW40) or (lastmode = BW80)
VideoMode := 40
else
VideoMode := 80;
end;
I've been told "conio.h" has a lastmode function, but it doesn't seem to be supported in Dev-C++ and Visual Studio C++. Is there a Windows function to know the number of columns in the current video mode?
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Oct 9, 2014
I have loads of movies on DVD and they are all on my media server, but the media server doesn't actually allow streaming to be done, the movies are just stored in a folder on the desktop.
My goal would be able to host all my movies on my LAN server, then build an application to run on a windows based PC at home, not over the Internet just over LAN. For example, say the server I have at home had all the movies in a folder on the desktop, then when I start the client on another PC or laptop in my house, I could view all the movies, choose which one and then stream it to that client PC. I am using C#.NET WPF visual studio.
Maybe I could use something like VLC player to play the movies but I would want to build an client application to view the movies and search for them on the server where the movies are stored. Also I know there are other media streaming programs out there but I want to develop my own one for my uses.
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May 1, 2014
I'm currently stuck whit a problem. I would like to access video memory of the console(Yes, only the black box) in C. I know how to do it in turbo pascal :
Var
video:array[0..4000] of char absolute $B800:0000;
But i don't know the numbers in C. I've searched for the numbers of the memory in C but i can't find it.
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Jun 15, 2013
I am using DirectShow to play/pause/stop a video file. I am having a slider control which increments with the playing video. I have done some calculation to find the exact step to forward or backward the video.
On dragging the slider to any position, video forwards/backwards to the new position, but slider doesn't get increment. Say I drag the slider from 10 to 50, video goes to the new position, but on releasing the capture slider again jumps back to the previous position from where it was dragged.
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Jan 13, 2015
I would like to know in which way is the best to make ActiveX control for video. ActiveX control will need at least show picture and be able to go back in past, change resulation of picture and similar. How complex it is to do something like that? Is MFC best way to make it? Is there somewhere similar code?
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May 4, 2015
I have code (found long time ago, ~2001) to make videos from OpenGL rendering in my view class. In my OnDraw() function I call the function SaveAsAvi(). This works as intended until I have 255 frames in the movie I am trying to make. After that, Windows Media Player claims it cannot play the file. VirtualDub claims the avi contains Palette Changes and shows the correct number of frames (>255) but all frames past 255 are the same and equal to the last frame.
Memory overflow? Need to free m_pixels sometime somewhere?
Code:
void C***View::SaveAsAvi() {
C***Doc* pDoc = GetDocument();
if (pDoc->m_avi_status == -1)// initialize AVI stuff {
KillTimer(1);
// allocate space for the pixel info
[Code] ....
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Apr 9, 2014
I am making a game of quiz and i want to play a small clip in one of the rounds, but i dont know how to do it in c++ ....
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Dec 3, 2014
I am working on a video game that is based on a tutorial I found online and I ran into an issue associated with accessing an object's method inside another class object's function without making the object global which seems bad.
Here is basically how the tutorial set things up in the game: The game has a base class called GameObject then there are other child classes that inherit from this class. The GameObject class has all the basic information an object would have that needs rendered on the screen (x/y position, size of bitmap, bitmap, whether or not it is collidable, etc).
One of the child classes SpaceShip, which is the player so it has attributes and methods associated with managing # of lives and points scored.
There are other child classes of GameObjects in the game that need to take life and add points from the SpaceShip object if they collide with the spaceship or other objects.
In the collision handling routine I basically call a function "void Collided(int objectID)" when a game object collides with another. Within the Collided() routine, there is logic that executes code or other functions based on the objectID it collided with. Some of the collisions require taking life from the spaceship or adding points. The way this was accomplished in the tutorial was with function pointers (see Bullet class constructor and collided method for example). Is this really the best way to handle this sort of thing? It seems like there has to be a simpler way than to keep referencing function pointers in any new class I want to add to the game. I realized this when I went to add a method for the spaceship to fire bullets rather than inside my game class.
My Project Source found here: [URL] .....
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Mar 26, 2014
I try to play a video I i don't know how.. I searched and i found some tips and articles, but all of it if about Windows Media Player. It's fine, but i need to play something lika an intro an i don't wanna show all that buttons of WMP.. I tried to hide it but no change.
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Apr 11, 2012
I use ffmpeg codes in my C++ app and would like to control the bit_rate parameter for VIDEO there. I tried to change its value in work (via ost->st->codec->bit_rate = 150000), but ffmpeg did not wish to change it.
I tried to make re-init of the codec:
Code:
....
ost->st->codec->bit_rate = 150000;
AVCodecContext* newContext = avcodec_alloc_context3(ost->enc);
avcodec_copy_context(newContext, ost->st->codec);
avcodec_close(ost->st->codec);
av_free(ost->st->codec);
ost->st->codec = newContext;
avcodec_open2(ost->st->codec, ost->enc, &ost->opts);
the program hanged after that codes.
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Jun 19, 2013
I am using DirectShow to Play / Pause / Stop and Capture Video files. But Capturing and playing of video files is simple. I want to Implement HD Video recording in my project.
how to Implement HD Video Capturing using DirectShow.?
Or Apart from DirectShow, is there any other method to Implement HD Video recording in MFC.
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Nov 19, 2013
I have a code which is a set of rgb frames to be displayed at 25 fps to make it look like a video. While I createWindow invalidate and update it based on a timer, the video plays fine, but the buttons of Play, Pause etc hangs during the time video is playing.?
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Nov 7, 2014
I am reading a file then printing the data onto the other file. It is working, however when I check to see if each variable is being properly set after reading the file a issue arises.
Example of the file being read
Code:
Vehicle PV50CAN passed camera 1 at 05:33:26.
Vehicle W867BRO passed camera 1 at 05:33:29.
Vehicle KQ63ARU passed camera 1 at 05:33:38.
Vehicle K954ITQ passed camera 1 at 05:33:40.
Vehicle V220MXB passed camera 1 at 05:33:42.
[Code] .....
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Jun 10, 2013
How would you create a video game in c++? I'm not sure really how to display the graphics and set properties and do all that stuff. I don't have money to buy a book about so how do you?
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Mar 25, 2014
I want to write a program that is going to turn on my webcam and then display whatever the webcam is pointing at on the app. But I am more interested in knowing how I can get a video recording as input from the webcam to one of the program functions, because I suppose that is what should happen.
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Nov 30, 2012
I am trying to overlay an image on a live video.I have used alpha blending method to overlay image on the video. On overlaying the image, it gets overlayed five times rather than one as expected.
Both frame data and the image data is taken as BYTE* for overlaying and displaying it.
The image used is a bitmap image.
The data (BYTE*) of both the video and the image is overlayed and the resultant is stored back in the variable of the video and den drawn on the picture control of vc++.
The video resolution is 640x480.
The image I m overlaying is 128x128.
The IDE used is visual studio professional.The code is developed using c++.
How do I overlay the bitmap image as a single image on the live video at a specific position.
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