use clippy suggestion

diff --git a/src/transcoder.rs b/src/transcoder.rs
index e1f7948ad0a9a31c6123d16b0801111f326318a7..bef9f6c897c78952fd7d461382a37d134f4ac19c 100644 (file)
--- a/src/transcoder.rs
+++ b/src/transcoder.rs
@@ -1152,7 +1152,7 @@ println!("encoder {} is not supported by output (expected {})", istr.id, istr.ge
                             Box::new(fr)
                         };
 
-                    let fformat = if let Some(ref fname) = ifmt { Some(fname.as_str()) } else { None };
+                    let fformat = ifmt.as_ref().map(|fname| fname.as_str());
                     let mut dmx = DemuxerObject::create(sb, full_reg, name, fformat, is_raw, &[], false);
                     if dmx.is_none() {
                         println!();