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author | Philip Langdale <philipl@overt.org> | 2017-05-29 09:48:10 -0700 |
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committer | wm4 <wm4@nowhere> | 2017-06-03 16:41:03 +0200 |
commit | 7424651b9637082f71deab9fcc87111e2d9df13f (patch) | |
tree | e5d4813a3195e56d39bd313900a765bc69d9e40d /DOCS/man/options.rst | |
parent | 7e889e5e637536cba3dfced3962ab87d7c8ea01f (diff) | |
download | mpv-7424651b9637082f71deab9fcc87111e2d9df13f.tar.bz2 mpv-7424651b9637082f71deab9fcc87111e2d9df13f.tar.xz |
vo_opengl: hwdec_cuda: Support separate decode and display devices
In a multi GPU scenario, it may be desirable to use different GPUs
for decode and display responsibilities. For example, if a secondary
GPU has better video decoding capabilities.
In such a scenario, we need to initialise a separate context for each
GPU, and use the display context in hwdec_cuda, while passing the
decode context to avcodec.
Once that's done, the actually hand-off between the two GPUs is
transparent to us (It happens during the cuMemcpy2D operation which
copies the decoded frame from a cuda buffer to the OpenGL texture).
In the end, the bulk of the work is around introducing a new
configuration option to specify the decode device.
Diffstat (limited to 'DOCS/man/options.rst')
-rw-r--r-- | DOCS/man/options.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst index 925c501881..2e781e2272 100644 --- a/DOCS/man/options.rst +++ b/DOCS/man/options.rst @@ -4802,6 +4802,16 @@ The following video options are currently all specific to ``--vo=opengl`` and This option might be silently removed in the future, if ANGLE fixes shader compilation speed. +``--cuda-decode-device=<auto|0..>`` + Choose the GPU device used for decoding when using the ``cuda`` hwdec. + + By default, the device that is being used to provide OpenGL output will + also be used for decoding (and in the vast majority of cases, only one + GPU will be present). + + Note that when using the ``cuda-copy`` hwdec, a different option must be + passed: ``--vd-lavc-o=gpu=<0..>``. + Miscellaneous ------------- |