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-rw-r--r--DOCS/man/options.rst17
1 files changed, 9 insertions, 8 deletions
diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst
index 3362cd142a..ce3bea5a15 100644
--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@@ -1233,17 +1233,18 @@ Video
``--cuda-decode-device=<auto|0..>``
Choose the GPU device used for decoding when using the ``cuda`` or
- ``nvdec`` hwdecs with the OpenGL GPU backend.
+ ``nvdec`` hwdecs with the OpenGL GPU backend, and with the ``cuda-copy``
+ or ``nvdec-copy`` hwdecs in all cases.
- By default, the device that is being used to provide ``gpu`` output will
- also be used for decoding (and in the vast majority of cases, only one
- GPU will be present).
+ For the OpenGL GPU backend, the default device used for decoding is the one
+ being used to provide ``gpu`` output (and in the vast majority of cases,
+ only one GPU will be present).
- Note that when using the ``cuda-copy`` or ``nvdec-copy`` hwdec, a
- different option must be passed: ``--vd-lavc-o=gpu=<0..>``.
+ For the ``copy`` hwdecs, the default device will be the first device
+ enumerated by the CUDA libraries - however that is done.
- Note that this option is not available with the Vulkan GPU backend. With
- Vulkan, decoding must always happen on the display device.
+ For the Vulkan GPU backend, decoding must always happen on the display
+ device, and this option has no effect.
``--vaapi-device=<device file>``
Choose the DRM device for ``vaapi-copy``. This should be the path to a