I agree with the others. The jacket itself does not look like a knit jacket. If you are making the whole thing from scratch, it may be possible to knit and attach the collar separately. But I think CapsuleCorp's idea of stitching the lines into fabric will probably give you the best look for the least amount of headache. One of my sweatshirts has a very similar looking collar and it's not knitted. Then again the fabric is not very slippery so the stitches get "eaten" by it, leaving these valleys that resemble ribbing.
Plays With String knitting/crochet commissions
Next conventions: Otakon, Anime Weekend Atlanta
Currently working on (commission): "Companion Cube" [custom] Mabel Pines (Gravity Falls)
Currently working on (personal): Fem!Pacha (The Emperor's New Groove), Spidermom ver. 3 (Homestuck)