pub fn composition_time_shift(&self) -> Option<u32> {
        if let Some(elst) = self.edit_list() {
           for entry in &elst.entries {
                if elst.entries[0].media_time > 0 {
                    return Some(entry.media_time as u32);
                }
            }
        }
        None
    }
/// Check the editlist to see if there's an initial composition time shift (see 8.6.1.3.1).
///
/// If there are multiple edits, this will only return the offset from the
/// first edit. TODO: maybe we should return an error in that case.
///
/// If there's an initial empty edit, it is ignored. Deal with it another way.
///
/// Return value is expressed in movie timescale units.
Check the editlist to see if there's an initial composition time shift .
If there are multiple edits, this will only return the offset from the
first edit. TODO: maybe we should return an error in that case.

If there's an initial empty edit, it is ignored. Deal with it another way.

Return value is expressed in movie timescale units.
Check the editlist to see if there ' s an initial composition time shift . If there are multiple edits this will only return the offset from the first edit . TODO : maybe we should return an error in that case . If there ' s an initial empty edit it is ignored . Deal with it another way . Return value is expressed in movie timescale units .
pub fn composition_time_shift(&self) -> Option<u32> {
        if let Some(elst) = self.edit_list() {
           for entry in &elst.entries {
                if elst.entries[0].media_time > 0 {
                    return Some(entry.media_time as u32);
                }
            }
        }
        None
    }
pub fn composition_time_shift ( & self ) -> Option < u32 > { if let Some ( elst ) = self . edit_list ( ) { for entry in & elst . entries { if elst . entries [ 0 ] . media_time > 0 { return Some ( entry . media_time as u32 ) ; } } } None }
Check the editlist to see if there's an initial composition time shift (see 8.6.1.3.1).
Check the editlist to see if there ' s an initial composition time shift ( see 8 . 6 . 1 . 3 . 1 ) .
&self
&self