more alpha render quality fixes

data/profiles.xml

@@ -36,16 +36,16 @@
  </group>
  <group name="Video with Alpha" renderer="avformat" type="av">
   <profile name="Alpha VP8" extension="webm"
-   qualities="63,4" defaultquality="10"
+   qualities="11,51" defaultquality="10"
    audioqualities="7,3" defaultaudioquality="5"
-   args="f=webm vcodec=libvpx acodec=vorbis rc_lookahead=16 speed=0 g=120 crf=%quality vprofile=0 vb=2M qmin=11 qmax=51 slices=4 maxrate=24M minrate=100k quality=good aq=%audioquality max-intra-rate=1000 mlt_image_format=rgba pix_fmt=yuva420p"
+   args="f=webm vcodec=libvpx acodec=vorbis rc_lookahead=16 speed=0 g=120 crf=%quality vprofile=0 vb=2M qmin=11 qmax=51 slices=4 maxrate=24M minrate=100k quality=good aq=%audioquality arnr_max_frames=7 arnr_strength=5 arnr_type=3 auto-alt-ref=0 mlt_image_format=rgba pix_fmt=yuva420p"
    speeds="cpu-used=2;cpu-used=3;cpu-used=4;cpu-used=5"/>
   <profile name="Alpha VP9" extension="webm"
-   qualities="37,15" defaultquality="31"
-   args="f=webm acodec=vorbis vcodec=libvpx-vp9 crf=%quality vb=0 ab=128k bf=2 threads=0 rc_lookahead=16 speed=3 vprofile=0 qmin=4 qmax=51 quality=good aq=%audioquality mlt_image_format=rgba pix_fmt=yuva420p"
+   qualities="15,37" defaultquality="31"
+   args="f=webm acodec=vorbis vcodec=libvpx-vp9 crf=%quality vb=0 ab=128k bf=2 threads=0 rc_lookahead=16 speed=3 vprofile=0 qmin=4 qmax=51 quality=good aq=%audioquality slices=4 tile-columns=6 frame-parallel=1 lag-in-frames=25 row-mt=1 auto-alt-ref=0 mlt_image_format=rgba pix_fmt=yuva420p"
    speeds="cpu-used=2;cpu-used=3;cpu-used=4;cpu-used=5"/>
   <profile name="Alpha MOV" extension="mov" 
-   args="vcodec=qtrle pix_fmt=argb"/>
+   args="f=mov vcodec=qtrle g=1 bf=0 progressive=1 mlt_image_format=rgba pix_fmt=argb"/>
   <profile name="Ut Video" extension="avi"
    args="f=avi vcodec=utvideo mlt_image_format=rgba pix_fmt=gbrap g=1 bf=0 acodec=pcm_s24le"/>
  </group>