Tuesday, January 31, 2017

trying vlc-warp build and other warping on Macbook

The vlc-warp code, when directly tried a build on Linux Mint 18.1 running on an i7 Macbook Pro, gave the error that
configure: error: libavcodec versions 56 and later are not supported yet.
http://stackoverflow.com/questions/18559322/configure-error-libavcodec-versions-55-and-later-are-not-s

When compiling on a Live DVD of Ubuntu 12.04, compiles OK. But that build will not run on the Linux Mint 18.1 with accelerated graphics. And the Live DVD will not boot with accelerated graphics! So, as of now, am pausing these efforts.

Trying the recommended way to compile on Mac OS - that needs the latest version of Xcode, and our Mac is running 10.8 Snow Leopard.

Tried the Quartz Composer patch from Paul Bourke - that also had some version compatibility issues, I guess, did not work on first few attempts.

Then directly tried the compiled warp-player from Paul Bourke - that itself was skipping frames when trying to warp and play a 50 Mbps 2K fulldome movie. So, pausing these efforts to make a realtime warping player work on this machine. 

Monday, January 30, 2017

Airtel SIM language selection loop

An occasional problem with Xiaomi Mi3 phone - Airtel sim language selection menu comes up again and again - seen for example after a change of SIM.

Solution seems to be to shut down the phone and start it again.

Wednesday, January 25, 2017

Fisheye to Equirectangular

Jason Fletcher has a post about converting footage from Fisheye to Equirectangular in After Effects. Similar to my Photoshop conversions to fisheye, but the other way around. Would be a useful reference for my conversions - by seeing where the images appear.

Wednesday, January 04, 2017

Airtel 3G speeds

To add to my Jio speed test posts, here are Airtel 3G speeds 3-4 pm at Puttaparthi - the times are visible in the top left corner. Not too shabby :) and definitely better than Jio during peak times.




And, a few days ago at 8.15 pm, with Airtel dongle,




Monday, January 02, 2017

offline fulldome option on Macbook pro - Gaia Sky

Since I had trouble compiling Stellarium360 to run on the Macbook Pro I have got as a loaner, tried out other options - Gaia Sky has a planetarium mode. But fisheye only, no support for mirror-dome. At high resolutions, my machine is unable to keep up refresh rates with Gaia Sky. But it could be used for offline rendering.

stellarium360 on Linux Mint 18.1

Linux Mint 18.1 Cinnamon works fine, dual booting with Mac OS 10.6.8 Snow Leopard, on an i7 Macbook Pro. Mageia Linux, the recommended option for Stellarium360, blanks the screen and / or crashes the system while trying to boot. So, tried compiling Stellarium360 on Linux Mint 18.1. But ran into problems.

ran the install dependencies for Ubuntu script, and ran ./configure. Configure complains that
checking for SDL2/SDL_image.h... yes
checking GL/glew.h usability... yes
checking GL/glew.h presence... yes
checking for GL/glew.h... yes
checking for ptrdiff_t... yes
checking for GraphicsMagick++-config... yes
checking for sdl2-config... yes
checking whether byte ordering is bigendian... no
checking for dirent.h that defines DIR... yes
checking for library containing opendir... no
checking for fabs in -lm... no
math library not found
checking for Mix_OpenAudio in -lSDL2_mixer... no
configure: error: *** SDL2_mixer library not found -  ***

But
libsdl2-mixer-dev is already the newest version (2.0.1+dfsg1-1).

I believe this has something to do with changing
-lSDL2_mixer to -lSDL2 or something like that at some point in the configure script, because the API call MixOpenAudio has shifted from one header to another or something? Not sure, just a guess.

But meanwhile, I thought Stellarium360 would work with spherical mirror systems also. Since it won't, then I will pause and rethink my efforts :)