how do you monitor video-memory consumption ? with nvidia-smi ?
is there any sense to buy PCI GT610 card with 1 GB memory for processing of 1080i/p HD video ? may be 512 MB will be enough ?
I plan to use vdpau decoding of HD video + temporal spatial deinterlacing + upscaling of SD video.
I'm seeing around 250M total memory use while decoding and deinterlacing 1080i to a single 1080 display. Composite extension completely disabled since all it does is cause tearing and eat memory like crazy. If all you need is video playback on that system then 512M is more than plenty.