mfvideoenc: Set PAR to output IMFMediaType

We've set it to input IMFMediaType but not for output.
So, if PAR is not 1:1, the input IMFMediaType will be accepted
by MFT (default is 1:1).
The PAR of input/output IMFMediaType must be identical

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1322>

diff --git a/sys/mediafoundation/gstmfvideoenc.cpp b/sys/mediafoundation/gstmfvideoenc.cpp
index 5d97cfc..4931fab 100644 (file)
--- a/sys/mediafoundation/gstmfvideoenc.cpp
+++ b/sys/mediafoundation/gstmfvideoenc.cpp
@@ -173,6 +173,14 @@ gst_mf_video_enc_set_format (GstVideoEncoder * enc, GstVideoCodecState * state)
     return FALSE;
   }
 
+  hr = MFSetAttributeRatio (out_type.Get (), MF_MT_PIXEL_ASPECT_RATIO,
+      GST_VIDEO_INFO_PAR_N (info), GST_VIDEO_INFO_PAR_D (info));
+  if (!gst_mf_result (hr)) {
+    GST_ERROR_OBJECT (self, "Couldn't set par %d/%d",
+        GST_VIDEO_INFO_PAR_N (info), GST_VIDEO_INFO_PAR_D (info));
+    return FALSE;
+  }
+
   hr = out_type->SetUINT32 (MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive);
   if (!gst_mf_result (hr)) {
     GST_ERROR_OBJECT (self,