per*_*amy 3 delphi ffmpeg delphi-7
IAM的delphi.i初学者创建一个示例应用程序,我需要一个帮助。如何在delphi中使用FFMPEG?
FFMPEG是一个命令行应用程序,因此您可以使用ShellExecute(),在此处提供一些示例,轻松地调用它。
但是,首先,您需要确定要使用的命令行开关。
如果您需要进一步的帮助,我可以在明天发布代码。
编辑:
这是运行命令行应用程序的更高级的方法:它将输出重定向到备注以供查看:
procedure GetDosOutput(CommandLine, WorkDir: string;aMemo : TMemo);
var
SA: TSecurityAttributes;
SI: TStartupInfo;
PI: TProcessInformation;
StdOutPipeRead, StdOutPipeWrite: THandle;
WasOK: Boolean;
Buffer: array[0..255] of AnsiChar;
BytesRead: Cardinal;
Handle: Boolean;
begin
AMemo.Lines.Add('Commencing processing...');
with SA do begin
nLength := SizeOf(SA);
bInheritHandle := True;
lpSecurityDescriptor := nil;
end;
CreatePipe(StdOutPipeRead, StdOutPipeWrite, @SA, 0);
try
with SI do
begin
FillChar(SI, SizeOf(SI), 0);
cb := SizeOf(SI);
dwFlags := STARTF_USESHOWWINDOW or STARTF_USESTDHANDLES;
wShowWindow := SW_HIDE;
hStdInput := GetStdHandle(STD_INPUT_HANDLE); // don't redirect stdin
hStdOutput := StdOutPipeWrite;
hStdError := StdOutPipeWrite;
end;
Handle := CreateProcess(nil, PChar('cmd.exe /C ' + CommandLine),
nil, nil, True, 0, nil,
PChar(WorkDir), SI, PI);
CloseHandle(StdOutPipeWrite);
if Handle then
try
repeat
WasOK := ReadFile(StdOutPipeRead, Buffer, 255, BytesRead, nil);
if BytesRead > 0 then
begin
Buffer[BytesRead] := #0;
AMemo.Text := AMemo.Text + Buffer;
end;
until not WasOK or (BytesRead = 0);
WaitForSingleObject(PI.hProcess, INFINITE);
finally
CloseHandle(PI.hThread);
CloseHandle(PI.hProcess);
end;
finally
CloseHandle(StdOutPipeRead);
AMemo.Lines.Add('Processing completed successfully.');
AMemo.Lines.Add('**********************************');
AMemo.Lines.Add('');
end;
end;
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可以这样称呼:
cmd := 'ffmpeg.exe -i "'+InFile+'" -vcodec copy -acodec copy "'+OutFile+'"';
GetDosOutput(cmd,FFMPEGDirectory,MemoLog);
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