The Broadcom BCM2724 is built to do what you are talking about. It is in the sandisk v-mate memory card recorder. They support pal/ntsc. Memory card: sd (mini/micro/standard), compact flash, memory stick. You can find them on ebay and online for around 30$ usd. They have drawbacks related to the remote control but there are control traces on the board itself if you wanted to put buttons on it.