将每个帧作为来自电影文件（QuickTime-API）的图像导出 [英] Export every frame as image from a Movie-File (QuickTime-API)

问题描述

我想打开一个现有的电影文件，并将此文件的每一帧导出为JPEG或TIFF等图像。我到目前为止：

  int main（int argc，char * argv []）{
 char filename [255]; //文件名ping。 
 OSErr e; //错误返回。 
 FSSpec filespec; // QT文件规范
 short filemovie; // QT电影句柄。 
电影电影; // QT movieobject。 
 
 InitializeQTML（0）; 
 EnterMovies（）; 
 //因为QT的Mac起源，必须将C字符串文件名
 //转换为Pascal计数字符串，然后使用它来创建文件规范。 
 c2pstr（filename）; 
 FSMakeFSSpec（0，0L，（ConstStr255Param）filename，& filespec）; 
 
 OpenMovieFile（& filespec，& filemovie，fsRdPerm）; 
 NewMovieFromFile（& movie，filemovie，nil，nil，newMovieActive，nil）; 
 ... 
  

直到现在它工作正常> TIMEVALUE movietime = GetMovieDuration（电影）; 并打印），但现在我想这部电影的每一帧，并将其导出到一个文件中（为先，以后我只是想保持数据在内存中使用它，但我必须知道如果它真的工作，所以导出到一个图像文件是更好的现在）。

我该怎么做？我需要一个GWorld或PixMap？

编辑：我的平台是WinXP

p>

解决方案

作为开始，这篇关于电影出口商的文章应该几乎让你开始：

http://www.mactech.com /articles/mactech/Vol.16/16.05/May00QTToolkit/index.html

尽管MACTECH是Mac的资源，所有的描述API函数应该可用在Windows版本的QuickTime SDK为好。

我会在这里，只要我觉得在一起的时候拍一些示例代码，自己作为一个参考。

编辑

有关详情，请参阅此书摘录：

QuickTime工具包 - Google图书的基本电影播放和媒体类型

编辑2 - 高级方法：电影出口商

如果你需要做到的是从一个QuickTime影片提取所有的视频帧，并将它们转换成由你赢得了QuickTime的API支持的另一种格式吨有采取任何低级别的动作无论如何，如果使用的电影出口商

下面的示例代码允许提取和转换所有的视频帧从QuickTime影片来，铁，一堆用编程调用影片导出对话框JPEG文件。

只要选择的电影图像序列的中 选项，选择对话框的导出组合框，然后选择所需的图片格式。

注意2：错误处理已被省略为了清楚起见

  #includeMovies.h
 #includeQTML.h
 #pragma comment（lib，QTMLClient.lib）
  

...

  int flags = createMovieFileDeleteCurFile 
 | showUserSettingsDialog 
 | movieToFileOnlyExport; 
 ItemCount movie_prop_count = 0; 
 CFStringRef cfpath = 0; 
 Boolean bool_true = true; 
 QTNewMoviePropertyElement movie_props [2]; 
电影电影; 
 
 //初始化QuickTime API 
 InitializeQTML（0）; 
 EnterMovies（）; 
 
 //设置核心基础字符串源路径（的argv [1]）包含对MOV文件的完整路径转换
 cfpath = CFStringCreateWithCString（0，ARGV [1]，kCFStringEncodingASCII ）; 
 movie_props [movie_prop_count] .propClass = kQTPropertyClass_DataLocation; 
 movie_props [movie_prop_count] .propID = kQTDataLocationPropertyID_CFStringNativePath; 
 movie_props [movie_prop_count] .propValueSize = sizeof（cfpath）; 
 movie_props [movie_prop_count] .propValueAddress =（void *）& cfpath; 
 movie_props [movie_prop_count] .propStatus = 0; 
 ++ movie_prop_count; 
 
 // make Movie active 
 movie_props [movie_prop_count] .propClass = kQTPropertyClass_NewMovieProperty; 
 movie_props [movie_prop_count] .propID = kQTNewMoviePropertyID_Active; 
 movie_props [movie_prop_count] .propValueSize = sizeof（bool_true）; 
 movie_props [movie_prop_count] .propValueAddress =& bool_true; 
 movie_props [movie_prop_count] .propStatus = 0; 
 ++ movie_prop_count; 
 
 // aquire我们的电影文件的电影
 NewMovieFromProperties（movie_prop_count，movie_props，0，0，& movie）; 
 
 //调用转换对话框
 ConvertMovieToFile（movie，0，0，0，'TVOD'，0，0，flags，0）; 
 
 //清理
 DisposeMovie（movie）; 
 CFRelease（cfpath）; 
 
 ExitMovies（）; 
 TerminateQTML（）; 
  

...

I want to open an existing Movie-File and export every frame of this file to an image like JPEG or TIFF. I got so far until now:

int main(int argc, char* argv[]) {
    char filename[255]; // Filename to ping.
    OSErr e;            // Error return.
    FSSpec filespec;    // QT file specification
    short filemovie;    // QT movie handle.
    Movie movie;        // QT movie "object".

    InitializeQTML(0);
    EnterMovies();
    // Because of QT's Mac origin, must convert C-string filename 
    // to Pascal counted string, then use that to make a filespec.
    c2pstr(filename); 
    FSMakeFSSpec(0, 0L, (ConstStr255Param)filename, &filespec);

    OpenMovieFile(&filespec, &filemovie, fsRdPerm);
    NewMovieFromFile(&movie, filemovie, nil, nil, newMovieActive, nil);
    ...

Until now it works fine (I tested with TimeValue movietime = GetMovieDuration(movie); and print it), but now I want to get every frame of the movie and export it to a file (for first, later i just want to keep the data in memory to work with it, but i have to know if it really works, so export to an image-file is better for now).
How do I do that? Do I need a GWorld or a PixMap? How do I get a GWorld/PixMap from a Movie-File, especially each frame of it?

edit: My Platform is WinXP

解决方案

As a beginning, this article on Movie exporters should pretty much get you started:

http://www.mactech.com/articles/mactech/Vol.16/16.05/May00QTToolkit/index.html

Even though MacTech is a Mac resource, all described API functions should be available in the QuickTime for Windows SDK as well.

I will slap some sample code together myself as a reference here as soon as I find the time.

Edit

See this book excerpt for additional info:

QuickTime Toolkit - Basic Movie Playback and Media Types @ Google Books

Edit 2 - The High-Level Approach: Movie Exporters

If all you need to accomplish is to extract all video frames from a QuickTime Movie and convert them to another format supported by the QuickTime API you won't have to take any low-level actions whatsoever if using a Movie Exporter.

The below sample code allows to extract and convert all video frames from a QuickTime Movie to, f.e., a bunch of JPEG files using a programmatically invoked Movie Export Dialog.

Just select Movie to Image Sequence in the Export combo box of the dialog and select your desired image format by hitting Options.

Note 1: If you need to do this non-interactively, just let me know.

Note 2: error handling has been omitted for clarity

#include "Movies.h"
#include "QTML.h"
#pragma comment (lib, "QTMLClient.lib")

...

int  flags                  = createMovieFileDeleteCurFile 
    | showUserSettingsDialog 
    | movieToFileOnlyExport;
ItemCount  movie_prop_count = 0;
CFStringRef  cfpath         = 0;
Boolean  bool_true          = true; 
QTNewMoviePropertyElement  movie_props[ 2 ];
Movie  movie;

// initialize QuickTime API
InitializeQTML( 0 );
EnterMovies();

// set up Core Foundation string for source path (argv[ 1 ]) contains the full path to the MOV file to convert
cfpath = CFStringCreateWithCString( 0, argv[ 1 ], kCFStringEncodingASCII );
movie_props[movie_prop_count].propClass        = kQTPropertyClass_DataLocation;
movie_props[movie_prop_count].propID           = kQTDataLocationPropertyID_CFStringNativePath;
movie_props[movie_prop_count].propValueSize    = sizeof(cfpath);
movie_props[movie_prop_count].propValueAddress = (void*)&cfpath;            
movie_props[movie_prop_count].propStatus       = 0;
++movie_prop_count;

// make Movie active
movie_props[movie_prop_count].propClass        = kQTPropertyClass_NewMovieProperty;
movie_props[movie_prop_count].propID           = kQTNewMoviePropertyID_Active;
movie_props[movie_prop_count].propValueSize    = sizeof(bool_true);
movie_props[movie_prop_count].propValueAddress = &bool_true;
movie_props[movie_prop_count].propStatus       = 0;
++movie_prop_count;

// aquire Movie for our Movie file
NewMovieFromProperties( movie_prop_count, movie_props, 0, 0, &movie );

// invoke conversion dialog
ConvertMovieToFile( movie, 0, 0, 0, 'TVOD', 0, 0, flags, 0 );

// clean up
DisposeMovie( movie );
CFRelease( cfpath );

ExitMovies();
TerminateQTML();

...

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