Yes, both the ADV734X and the ADV739X can both support the RS170 specification for video. The following I2C writes are required:
Register 0x86, bits [1:0] = 01B will change the delay from the falling edge of HS to the start of the color burst to 5.3uS
Register 0x84, bit [3] = 1B reduces active video line length (increases horizontal blanking period.)
Regards,
Paul