Changes between Version 25 and Version 26 of Capture/Desktop

Timestamp:

Aug 6, 2022, 10:02:17 AM (4 years ago)

Author:

Timo R.

Comment:

--

Capture/Desktop

@@ -97 +97 @@
 }}}
 
+== Use Windows 8+ Desktop Duplication API == 
+
+Windows 8 introduced a new way of capturing whole desktops: The Desktop Duplication API
+
+FFmpeg implements support for it in the form of the [https://ffmpeg.org/ffmpeg-filters.html#ddagrab ddagrab] filter.
+
+It provides the user with on-gpu D3D11 textures, in the form of ffmpeg D3D11VA frames, which can then be directly encoded by a compatible hardware encoder:
+{{{
+ffmpeg -init_hw_device d3d11va -filter_complex ddagrab=0 -c:v h264_nvenc -cq:v 20 output.mkv
+}}}
+
+Or downloaded and processed as usual, though with a bit of overhead compared to pure on-GPU processing:
+{{{
+ffmpeg -filter_complex ddagrab=0,hwdownload,format=bgra -c:v libx264 -crf 20 output.mkv
+}}}
+
 = Hardware Encoding =