CreateCopy() on JPEG driver always fails

[kabiraman]

I am trying to create a JPEG of a raster dataset, however CreateCopy?() fails (get back an empty pointer) on all raster datasets I've tried. Here's the code:

bool GDALFileConverterProcess::writeToFile(GDALDataset* pDS)
{
	const char* pFormat = "JPEG";
	GDALDriver* pDriver;
	char** ppMetadata;

	pDriver = GetGDALDriverManager()->GetDriverByName(pFormat);

	if(pDriver == NULL)
	{
		return false;
	}

	ppMetadata = pDriver->GetMetadata();

    if(!CSLFetchBoolean( ppMetadata, GDAL_DCAP_CREATECOPY, FALSE))
	{
		return false;
	}

	GDALDatasetH pConvertedDataset = 0;
		pConvertedDataset = 
			pDriver->CreateCopy(m_strSavePath.c_str(), pDS, FALSE, NULL, NULL, NULL);
	if (pConvertedDataset == 0)
	{
		return false;
	}
	GDALClose(pConvertedDataset);

	return true;
}

[warmerdam]

The presented code is not sufficent to diagnose the problem.

Is an error issued with CPLError() during the create copy operation? If stderr is lost in your setup, you can still call CPLGetLastErrorMsg() after the CreateCopy?() call.

Generally speaking an explanatory error should be issued if the createcopy fails. The JPEG format only supports a fairly limited number of configurations (8bit*1band and 8bit*3bands) so that might be the issue, but you provide no information on the input image configurations.

[rouault]

Closing due to lack of feedback from reporter.