Is it possible to use memory layers in QGIS processing algorithms?

It seems like memory layers cannot be used as input for GDAL/OGR processing scripts because Processing fails to properly prepare the data for use with ogr2ogr. That's why, for example, the QGIS buffer tool works but the GDAL/OGR buffer tool fails:

Algorithm Buffer vectors starting...
GDAL command:
cmd.exe /C ogr2ogr.exe "C:\Users\anita\AppData\Local\Temp\processing70e5e0852cb9456ba2e3780f8386122e\86d237c8f41443f58a230a8133172047\OUTPUTLAYER.shp" point?crs=EPSG:4326&memoryid={6772bccd-f55d-461d-aff6-6271ded02eea} point?crs=EPSG:4326&memoryid={6772bccd-f55d-461d-aff6-6271ded02eea} -dialect sqlite -sql "SELECT ST_Buffer( geometry , 1000 ),* FROM 'point?crs=EPSG:4326&memoryid={6772bccd-f55d-461d-aff6-6271ded02eea}' " 
GDAL command output:
FAILURE: 
Unable to open datasource `point?crs=EPSG:4326' with the following drivers. 
-> JP2ECW 
-> OCI 
-> SOSI 
...

Processing would have to somehow prepare the data (save it to a file) and then feed it to the GDAL/OGR tool.

I opened a ticket: Cannot use memory layers with OGR tools

That is the correct way, as explained in the documentation http://docs.qgis.org/2.14/es/docs/user_manual/processing/console.html

the next code work with in memory all except the last that it is load

MDT=path/mdt.tif
drain=processing.runalg("grass:r.drain",MDT,"",(pun),False,False,False,"%f,%f,%f,%f"% (xmin, xmax, ymin, ymax),0,-1,0.00100,None)
vect=processing.runalg("grass:r.to.vect",drain['output'],0,False,"%f,%f,%f,%f"% (xmin, xmax, ymin, ymax),0,None)
bu=processing.runalg("qgis:fixeddistancebuffer",vect['output'],Metros_afecta,1,False,None)
buf=bu['OUTPUT']
bufe= QgsVectorLayer(buf,"area", "ogr")
#the last load the layer 
QgsMapLayerRegistry.instance().addMapLayers([bufe])

the processing.runalg return a dictionary in this case bu['OUTPUT'] OUTPUT IS THE KEY, and the value is a temp path you can see the key with processeing.alghelp("name processing") as processing,alghelp("grass:r.drain")

return

processing.alghelp("grass:r.drain")
ALGORITHM: r.drain - Traces a flow through an elevation model on a raster map.
input <ParameterRaster>
coordinate <ParameterString>
vector_points <ParameterMultipleInput>
-c <ParameterBoolean>
-a <ParameterBoolean>
-n <ParameterBoolean>
GRASS_REGION_PARAMETER <ParameterExtent>
GRASS_REGION_CELLSIZE_PARAMETER <ParameterNumber>
GRASS_SNAP_TOLERANCE_PARAMETER <ParameterNumber>
GRASS_MIN_AREA_PARAMETER <ParameterNumber>
output <OutputRaster>

in this case the key is output , take care with capital letter you must writte in capital or with out capital, in this case not capital