#3964 ensure NV12 encoded streams are decoded the same as YUV420P

since the subsampling is the same

xpra/codecs/constants.py

@@ -58,6 +58,8 @@
     "YUV422P" : 1.5,
 }
 
+CSC_ALIAS = {"NV12": "YUV420P"}
+
 
 def get_plane_name(pixel_format: str = "YUV420P", index: int = 0) -> str:
     return {

xpra/codecs/gstreamer/capture.py

@@ -18,7 +18,7 @@
 )
 from xpra.gtk.gobject import n_arg_signal
 from xpra.gstreamer.pipeline import Pipeline
-from xpra.codecs.constants import get_profile
+from xpra.codecs.constants import get_profile, CSC_ALIAS
 from xpra.codecs.gstreamer.common import (
     get_version, get_type, get_info,
     init_module, cleanup_module,
@@ -238,7 +238,7 @@ def on_new_sample(self, _bus) -> int:
             self.frames += 1
             client_info = self.extra_client_info
             client_info["frame"] = self.frames
-            client_info["csc"] = self.csc_mode
+            client_info["csc"] = CSC_ALIAS.get(self.csc_mode, self.csc_mode)
             self.extra_client_info = {}
             self.emit("new-image", self.pixel_format, data, client_info)
         if SAVE_TO_FILE:

xpra/codecs/nvidia/nvenc/encoder.pyx

@@ -25,7 +25,7 @@ from xpra.codecs.nvidia.cuda.context import (
     cuda_device_context, load_device,
 )
 from xpra.codecs.nvidia.cuda.errors import get_error_name
-from xpra.codecs.constants import VideoSpec, TransientCodecException
+from xpra.codecs.constants import VideoSpec, TransientCodecException, CSC_ALIAS
 from xpra.codecs.image import ImageWrapper
 from xpra.codecs.nvidia.util import (
     get_nvidia_module_version, get_license_keys,
@@ -2709,7 +2709,7 @@ cdef class Encoder:
         self.free_memory, self.total_memory = driver.mem_get_info()
 
         client_options = {
-                    "csc"       : self.src_format,
+                    "csc"       : CSC_ALIAS.get(self.src_format, self.src_format),
                     "frame"     : int(self.frames),
                     "pts"       : int(timestamp-self.first_frame_timestamp),
                     }