And e. Drivers might be setting this flag randomly. Also, at least nvidia has vendor-specific API to signal those. The drm kernel module actually supports setting the relevant 3D-Modes, but the userspace software xrandr currently has no corresponding switches. The hack I used last year, was to alter the drm code slightly such that it outputs the flags if the requested screen size has a form normally used for frame packing.
See this "ask ubuntu" question. So this is actually rather an xrandr issue and perhaps graphic card driver issue if they don't use the mentioned part of the drm module - the intel driver does. Not sure that you are still into that stuff, but I didn't find any better place to ask questions regarding stereoscopic video in linux, so I am on Kubuntu Cosmic with nvidia-driver Skip to content.
Star New issue. Jump to bottom. Labels core:file core:video meta:feature-request priority:low priority:stalled vo:gpu. Copy link. Management summary: This is a request to implement an mpv option that causes x sized videos to be played as a x sized output, with 45 blank lines being inserted between the "upper" and "lower" half of the input video. To try this feature: Obtain some sample p 3D video, e. Modeline "x 24" Section "Screen" EndSection Use xrandr to switch the display into this mode I would certainly automate this via mpv-plugin-xrandr , like this: xrandr --output HDMI-0 --mode "x 24".
Uh, waiting for that command line. This lavfi graph should work via the mpv lavfi filter too. We now have user shaders. I have to admit that as of yet, I am not proficient in OGSL - the last time I did some X11 graphics driver programming, simple latches provided "state of the art" 2D acceleration, and the Amiga's Blitter was top-notch high tech :- Can you refer to some OGSL sample that would be a good starting point to derive an "insert 45 blank lines" shader script?
User shaders have zero control over the output size Huh? It would probably require embedding some sort of mathematical expression language as well The main point of the current API is letting you modify the output - eg. And there would be some mechanism to prevent this from doing so in an endless loop Clearly ugly and undesirable, IMO, because it changes the window size from what the user wanted - and in the case of fullscreen, it doesn't even make sense at all. The output would get cut off.
Clearly undesirable for this use case because you'd be missing image portions and it probably wouldn't even work. This is the only one that makes any sort of logical sense, but now it means we have to embed some sort of arithmetic solver or backtracking logic programming EDSL in the style of eg. Also note that for p only 30 lines are inserted. Probably would make things slower and preclude hw decoding.
This frame packing stuff seems rather arbitrary. I updated documentation. Maybe it helps somebody. More observations on this topic in case someone is interested: NVidia drivers for Windows have a checkbox to enable 3D output.
If checked, Windows shows enabled 3D switch in Display Properties. When checkboxes in drivers and display settings are off, another propietary player called Stereoscopic Player forces the system to go 3D and TV detects it too when in player's settings i set output mode to "Quad Buffer DirectX".
Maybe player tells driver to go 3D, or driver autodetects something when player uses quad buffer DirectX calls, i don't know. If the player is closed, system goes back into normal resolution. If the player process is killed, system stays in 3D resolution. So this is definetly software magic somewhere between player, kernel and GPU, not just resolution changing.
So it seems this feature is after all more complicated to implement than I assumed. And, given the decreasing relevance of 3D output in general, it might just not be worth following up on this. What do you mean by decreasing relevance of 3D I can not notice a drop of 3D media publishing, e. Also, the latest high-end TVs from different vendors do no longer provide a "3D"-feature, simply for the fact that it provides greater marketing value at lower cost to them to not put a polarization filter in front of the display, where it will filter away valuable luminance for the 2D use case, which is currently in focus of "HDR"-feature advertisements of new TVs.
These two are strong indications of the decreasing relevance of 3D. But I think this is off-topic. Akemi added core:file core:video vo:gpu labels Sep 21, Sign up for free to join this conversation on GitHub.
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