checkFile(source2,"source2", true, true, false);
if(!checkDestination(source1,destination,name,nameconflict)) return;
Pair s1 =toMpeg(source1);
Pair s2 =toMpeg(source2);
source = new VideoInputImpl(pageContext.getConfig().getTempDirectory().getRealResource("tmp-"+new Random().nextInt()+".mpg"));
try {
merge(s1.res,s2.res,source.getResource());
Struct sct = doActionConvert();
sct.setEL(SOURCE1, s1.sct);
sct.setEL(SOURCE2, s2.sct);