don't try to run the full vpx tests if the system has less than 2GB o…

…f ram

git-svn-id: https://xpra.org/svn/Xpra/trunk@10508 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/codecs/vpx/encoder.pyx

@@ -659,6 +659,18 @@ def selftest(full=False):
     global CODECS
     CODECS = testencoder(encoder, full)
     #this is expensive, so don't run it unless "full" is set:
+    if full and os.name=="posix":
+        #but first, try to figure out if we have enough memory to do this
+        import subprocess
+        p = subprocess.Popen("free -b | grep ^Mem:", shell=True, stdout=subprocess.PIPE)
+        stdout = p.communicate()[0]
+        out = stdout.decode('utf-8')
+        freemem_MB = int(out.split(" ")[-1])//1024//1024
+        if freemem_MB<2048:
+            log.info("system has only %iMB of memory available, skipping vpx max-size tests", freemem_MB)
+            full = False
+        else:
+            log.info("system has %.1fGB of memory available, running full tests", freemem_MB/1024.0)
     if full:
         global MAX_SIZE
         for encoding in get_encodings():