Changes between Version 5 and Version 6 of linux/media

Timestamp:

02/19/2019 10:36:57 PM (5 years ago)

Author:

Tim Harvey

Comment:

additional mem2mem examples and use v4l2video8convert instead of gst-master v4l2convert

linux/media

@@ -354 +354 @@
 # upscale
 gst-launch-1.0 videotestsrc ! video/x-raw,width=320,height=240 ! \
-    v4l2convert ! \
+    v4l2video8convert ! \
     video/x-raw,width=640,height=480 ! kmssink can-scale=false
 # downscale
 gst-launch-1.0 videotestsrc ! video/x-raw,width=640,height=480 ! \
-    v4l2convert ! \
+    v4l2video8convert ! \
     video/x-raw,width=320,height=240 ! kmssink can-scale=false
 # rotate
 gst-launch-1.0 videotestsrc ! video/x-raw,width=320,height=240 ! \
-    v4l2convert extra-controls=cid,rotate=90 ! \
+    v4l2video8convert extra-controls=cid,rotate=90 ! \
     video/x-raw,width=240,height=320 ! kmssink can-scale=false
 # hflip
 gst-launch-1.0 videotestsrc ! video/x-raw,width=320,height=240 ! \
-    v4l2convert extra-controls=cid,horizontal_flip=1 ! \
+    v4l2video8convert extra-controls=cid,horizontal_flip=1 ! \
     video/x-raw,width=640,height=480 ! kmssink can-scale=false
 # vflip
 gst-launch-1.0 videotestsrc ! video/x-raw,width=320,height=240 ! \
-    v4l2convert extra-controls=cid,vertical_flip=1 ! \
+    v4l2video8convert extra-controls=cid,vertical_flip=1 ! \
     video/x-raw,width=640,height=480 ! kmssink can-scale=false
 }}}
   - note the above examples force the input format (resolution in this case) to differ from the output format otherwise gstreamer will bypass the v4l2convert entity thinking it not necessary as gstreamer does not understand the flip/rotation properties. GStreamer master (in development) adds the 'disable-passthrough' property which can be enabled to force disabling passthrough
+ * scale/rotate/flip using imx-media capture device and KMS display driver (can use dmabufs for this as they are all imx hardware entitites):
+{{{#!bash
+# scale sensor input to 720p display
+gst-launch-1.0 v4l2src device=$DEVICE ! \
+     v4l2video8convert output-io-mode=dmabuf-import ! \
+     video/x-raw,width=1280,height=720 ! \
+     kmssink can-scale=false
+# scale sensor input to 1080p display
+gst-launch-1.0 v4l2src device=$DEVICE ! \
+     v4l2video8convert output-io-mode=dmabuf-import ! \
+     video/x-raw,width=1920,height=1080 ! \
+     kmssink can-scale=false
+# scale/flip
+gst-launch-1.0 v4l2src device=$DEVICE ! \
+     v4l2video8convert output-io-mode=dmabuf-import extra-controls=cid,horizontal_flip=1 ! \
+     video/x-raw,width=1920,height=1080 ! \
+     kmssink can-scale=false
+# scale/rotate
+gst-launch-1.0 v4l2src device=$DEVICE ! \
+     v4l2video8convert output-io-mode=dmabuf-import extra-controls=cid,rotate=90 ! \
+     video/x-raw,width=720,height=1280 ! \
+     kmssink can-scale=false
+}}}
 
 
@@ -402 +425 @@
 # encode
 gst-launch-1.0 v4l2src device=$DEVICE ! \
-     v4l2convert output-io-mode=dmabuf-import ! \
+     v4l2video8convert output-io-mode=dmabuf-import ! \
      v4l2h264enc output-io-mode=dmabuf-import ! \
      rtph264pay ! udpsink host=$SERVER port=$PORT
 # scale/encode
 gst-launch-1.0 v4l2src device=$DEVICE ! \
-     v4l2convert output-io-mode=dmabuf-import ! \
+     v4l2video8convert output-io-mode=dmabuf-import ! \
      video/x-raw,width=1440,height=960 ! \
      v4l2h264enc output-io-mode=dmabuf-import ! \
@@ -413 +436 @@
 # scale/flip/encode
 gst-launch-1.0 v4l2src device=$DEVICE ! \
-     v4l2convert output-io-mode=dmabuf-import extra-controls=cid,horizontal_flip=1 ! \
+     v4l2video8convert output-io-mode=dmabuf-import extra-controls=cid,horizontal_flip=1 ! \
      video/x-raw,width=1440,height=960 ! \
      v4l2h264enc output-io-mode=dmabuf-import ! \
@@ -419 +442 @@
 # scale/rotate/encode
 gst-launch-1.0 v4l2src device=$DEVICE ! \
-     v4l2convert output-io-mode=dmabuf-import extra-controls=cid,rotate=90 ! \
+     v4l2video8convert output-io-mode=dmabuf-import extra-controls=cid,rotate=90 ! \
      video/x-raw,width=1440,height=960 ! \
      v4l2h264enc output-io-mode=dmabuf-import ! \