我有一個製作AVI電影的Delphi 6應用程序。我已經到了可以編寫具有未壓縮視頻幀的AVI文件的程度。當我嘗試創建一個壓縮的視頻流,我碰到一個錯誤AVIERR_MEMORY當我叫AVIStreamSetFormat():在AVIStreamSetFormat()調用期間發生AVIERR_MEMORY錯誤
hr := AVIStreamSetFormat(
FAvi_.thePsCompressed,
0,
@dsBmih,
dsBmih.biSize + dsBmih.biClrUsed * sizeof(RGBQUAD));
爲什麼會出現這個錯誤,我能做些什麼來解決這個問題?
這是我選擇Cinepak Code by Radius壓縮器後,使用AVISaveOptions()調用後的壓縮選項數據結構的內容。請注意,如果我選擇一個不同的壓縮機我還是得到錯誤:
fccType: 0
fccHandler: 1684633187
dwKeyFrameEvery: 0
dwQuality: 8800
dwBytesPerSecond: 0
dwFlags: 8
lpFormat: nil
cbFormat: 0
lpParms: nil
cbParms: 4
dwInterleaveEvery: 0
這裏是TBitmapHeaderInfo數據結構的內容:
biSize: 40
biWidth: 320
biHeight: -240
biPlanes: 1
biBitcount: 32
biCompression: 0
biSizeImage: 307200
biXPelsPerMeter: 0
biYPelsPerMeter: 0
biClrUsed: 0
biClrImportant: 0
這裏是一個包含調用AVIStreamSetFormat方法():
function TAviWriterWithCompression.compressionDirect(
opts: PAVICOMPRESSOPTIONS;
bShowDialog: boolean;
hparent: HWND;
dsBmih: TBitmapInfoHeader;
sizeImage: integer;
DIBValues: Pointer;
framesPerSecond: integer): HRESULT;
var
lastErr: string;
hr: HRESULT;
myopts: TAVICOMPRESSOPTIONS;
aopts: array[0..0] of PAVICOMPRESSOPTIONS;
res: Bool;
begin
if not FIsVirginFile then
begin
// The output file already has at least one audio or video frame so
// setting or changing the compression format is not allowed.
Result := LongInt(AVIERR_ERROR);
// =========================== EXIT POINT ==============
exit;
end; // if not Assigned(FAvi_) then
if not Assigned(FAvi_) then
begin
Result := LongInt(AVIERR_BADHANDLE);
// =========================== EXIT POINT ==============
exit;
end; // if not Assigned(FAvi_) then
// Check the utility object for an error.
if (FAvi_.iserr) then
begin
Result := LongInt(AVIERR_ERROR);
// =========================== EXIT POINT ==============
exit;
end; // if (FAvi_.iserr) then
// Make sure the compressor has not already been selected.
if Assigned(FAvi_.thePsCompressed) then
begin
Result := LongInt(AVIERR_COMPRESSOR);
// =========================== EXIT POINT ==============
exit;
end; // if (FAvi_.iserr) then
// create the stream, if it wasn't there before
if not Assigned(FAvi_.thePs) then
begin
hr := createVideoStream(dsBmih, framesPerSecond);
if hr <> AVIERR_OK then
begin
Result := hr;
// Set the error flag in our utility object.
FAvi_.iserr := true;
// =========================== EXIT POINT ==============
exit;
end; // if hr <> AVIERR_OK then
end; // if not Assigned(FAvi_.thePs) then
// set the compression, prompting dialog if necessary
if not Assigned(FAvi_.thePsCompressed) then
begin
ZeroMemory(@myopts, sizeof(myopts));
if Assigned(opts) then
// Use the provided compressor options
aopts[0] := opts
else
// Use our initialized (empty) variable.
aopts[0] := @myopts;
// Does the caller want to show the compressor dialog box?
if (bShowDialog) then
begin
res := AVISaveOptions(hparent, 0, 1, FAvi_.thePs, aopts[0]);
if not res then
begin
AVISaveOptionsFree(1, aopts[0]);
// Set the error flag.
FAvi_.iserr := true;
Result := LongInt(AVIERR_USERABORT);
// =========================== EXIT POINT ==============
exit;
end; // if res = 0 then
end; // if (bShowDialog) then
hr := AVIMakeCompressedStream(FAvi_.thePsCompressed, FAvi_.thePs, aopts[0], nil);
if hr <> AVIERR_OK then
begin
Result := hr;
// Set the error flag in our utility object.
FAvi_.iserr := true;
// =========================== EXIT POINT ==============
exit;
end; // if hr <> AVIERR_OK then
AVISaveOptionsFree(1, aopts[0]);
postDiagMsg('Avi::compression after AVISaveOptionsFree()');
// >>>> This is where I get the AVIERR_MEMORY error.
hr := AVIStreamSetFormat(FAvi_.thePsCompressed, 0, @dsBmih, dsBmih.biSize + dsBmih.biClrUsed * sizeof(RGBQUAD));
if hr <> AVIERR_OK then
begin
Result := hr;
// Set the error flag in our utility object.
FAvi_.iserr := true;
// =========================== EXIT POINT ==============
exit;
end; // if hr <> AVIERR_OK then
end; // if not Assigned(FAvi_.thePsCompressed) then
Result := AVIERR_OK;
end;