SCHEMA:
CREATE TABLE table_name_44 (frame_size VARCHAR, color_sampling VARCHAR, audio_coding VARCHAR, format_name VARCHAR)
USER:
What frame size has pcm 4 ch/16 bit/48khz as audio coding and dvcam as the format name and 4:1:1 as the color sampling?

QUERY:
SELECT frame_size FROM table_name_44 WHERE audio_coding = "pcm 4 ch/16 bit/48khz" AND format_name = "dvcam" AND color_sampling = "4:1:1"