2012-05-14, 10:48
More good news. After some advice from FernetMenta I dropped the FFMPEG filter approach. I successfully implemented a new interlaced output mode within the XBMC render manager, I have called RENDER_WEAVEX2. The mode can work with software rendering and shader rendering modes. It can also work with VDPAU rendering however to achieve this, this fork of XBMC must be modified with the new mode:
https://github.com/FernetMenta/xbmc
I will request that the new mode be implemented in both the official and FernetMenta XBMC repos.
Current limitations are WEAVEX2 works well in 1080i output modes with perfect field synch, but 576i and 480i modes are not possible yet because of the pixel doubling requirement of HDMI at these low resolution modes. I have tested 576i video at original size within 1080i mode (imagine big black borders round a small picture) and the TV quite happily accepts that, but not suitable for comfortable viewing.
https://github.com/FernetMenta/xbmc
I will request that the new mode be implemented in both the official and FernetMenta XBMC repos.
Current limitations are WEAVEX2 works well in 1080i output modes with perfect field synch, but 576i and 480i modes are not possible yet because of the pixel doubling requirement of HDMI at these low resolution modes. I have tested 576i video at original size within 1080i mode (imagine big black borders round a small picture) and the TV quite happily accepts that, but not suitable for comfortable viewing.
