Changes between Version 5 and Version 6 of Hardware/VAAPI

Timestamp:

Feb 24, 2018, 5:19:31 PM (8 years ago)

Author:

jkqxz

Comment:

--

Hardware/VAAPI

@@ -186 +186 @@
 }}}
 
+==== Camera Capture ====
+
+Capture a raw stream from a V4L2 camera device and encode it as H.264:
+{{{
+ffmpeg -vaapi_device /dev/dri/renderD128 -f v4l2 -video_size 1920x1080 -i /dev/video0 -vf 'format=nv12,hwupload' -c:v h264_vaapi output.mp4
+}}}
+
+Capture an MJPEG stream from a V4L2 camera device (e.g. a UVC webcam), decode it and encode it as H.264:
+{{{
+ffmpeg -f v4l2 -input_format mjpeg -video_size 1920x1080 -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 -hwaccel_output_format vaapi -i /dev/video0 -vf 'scale_vaapi=format=nv12' -c:v h264_vaapi output.mp4
+}}}
+The extra scale_vaapi instance is needed here to convert the VAAPI surfaces to the correct format for encoding - webcams will typically supply images in YUV 4:2:2 format.
+
+==== Screen Capture ====
+
 Capture the screen from X and encode with H.264 at reasonable constant-quality:
 {{{