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Diffstat (limited to 'DOCS/man/vo.rst')
| -rw-r--r-- | DOCS/man/vo.rst | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/DOCS/man/vo.rst b/DOCS/man/vo.rst index 697584ca98..bc0dd9fd12 100644 --- a/DOCS/man/vo.rst +++ b/DOCS/man/vo.rst @@ -447,10 +447,12 @@ Available video output drivers are: Note that this option never affects ``cscale``. ``pbo`` - Enable use of PBOs. This is slightly faster, but can sometimes lead to - sporadic and temporary image corruption (in theory, because reupload - is not retried when it fails), and perhaps actually triggers slower - paths with drivers that don't support PBOs properly. + Enable use of PBOs. On some drivers this can be faster, especially if + the source video size is huge (e.g. so called "4K" video). On other + drivers it might be slower or cause latency issues. + + In theory, this can sometimes lead to sporadic and temporary image + corruption (because reupload is not retried when it fails). ``dither-depth=<N|no|auto>`` Set dither target depth to N. Default: no. @@ -481,7 +483,7 @@ Available video output drivers are: ``temporal-dither`` Enable temporal dithering. (Only active if dithering is enabled in - general.) This changes between 8 different dithering pattern on each + general.) This changes between 8 different dithering patterns on each frame by changing the orientation of the tiled dithering matrix. Unfortunately, this can lead to flicker on LCD displays, since these have a high reaction time. @@ -492,7 +494,7 @@ Available video output drivers are: video frame, 2 on every other frame, etc. ``debug`` - Check for OpenGL errors, i.e. call ``glGetError()``. Also request a + Check for OpenGL errors, i.e. call ``glGetError()``. Also, request a debug OpenGL context (which does nothing with current graphics drivers as of this writing). @@ -741,7 +743,7 @@ Available video output drivers are: ``glfinish`` Call ``glFinish()`` before and after swapping buffers (default: disabled). - Slower, but might help getting better results when doing framedropping. + Slower, but might improve results when doing framedropping. Can completely ruin performance. The details depend entirely on the OpenGL driver. @@ -770,9 +772,9 @@ Available video output drivers are: The value ``auto`` will try to determine whether the compositor is active, and calls ``DwmFlush`` only if it seems to be. - This may help getting more consistent frame intervals, especially with - high-fps clips - which might also reduce dropped frames. Typically a - value of ``windowed`` should be enough since full screen may bypass the + This may help to get more consistent frame intervals, especially with + high-fps clips - which might also reduce dropped frames. Typically, a + value of ``windowed`` should be enough, since full screen may bypass the DWM. Windows only. @@ -955,9 +957,11 @@ Available video output drivers are: things like softsubbed ASS signs to match the video colors, but may cause SRT subtitles or similar to look slightly off. - ``alpha=<blend|yes|no>`` - Decides what to do if the input has an alpha component (default: blend). + ``alpha=<blend-tiles|blend|yes|no>`` + Decides what to do if the input has an alpha component. + blend-tiles + Blend the frame against a 16x16 gray/white tiles background (default). blend Blend the frame against a black background. yes @@ -984,7 +988,7 @@ Available video output drivers are: This is equivalent to:: - --vo=opengl:scale=spline36:cscale=spline36:dscale=mitchell:dither-depth=auto:correct-downscaling:sigmoid-upscaling:pbo:deband:es=no + --vo=opengl:scale=spline36:cscale=spline36:dscale=mitchell:dither-depth=auto:correct-downscaling:sigmoid-upscaling:deband:es=no Note that some cheaper LCDs do dithering that gravely interferes with ``opengl``'s dithering. Disabling dithering with ``dither-depth=no`` helps. |