Nginx Conditional Logging by URL Filtering w/ WSE?

Wowza Streaming Engine
1

We front-end our WSE implementations with Nginx. This allows us to control SSL and pass along the user identity information. In our Nginx logs, we are getting entries for each fragment that WSE serves, AKA _0.ts, _1.ts, _2.ts, and so on. Obviously for a busy implementation this chews up a lot of log space and creates a concern. Has anyone implemented filtering whereby we only to log the .m3u8 or .mp4 requests within Nginx? Thanks!