Digging into the AVFoundation i found the solution by myself. I just had to check the AVAssetExportSessions allExportPresets property for the presets i would want to use even if i don't use the presets themselfs rather than creating my own options.
To do this, i use this code:
if([[AVAssetExportSession allExportPresets] containsObject:AVAssetExportPreset640x480]){
NSLog(@"480p");
}
if([[AVAssetExportSession allExportPresets] containsObject:AVAssetExportPreset960x540]){
NSLog(@"540p");
}
if([[AVAssetExportSession allExportPresets] containsObject:AVAssetExportPreset1280x720]){
NSLog(@"720p");
}
if([[AVAssetExportSession allExportPresets] containsObject:AVAssetExportPreset1920x1080]){
NSLog(@"1080p");
}