non-primitive cast: `unsafe extern "C"

[lantq1979]

error[E0605]: non-primitive cast: unsafe extern "C" fn(*mut c_void, *const u8, i32) -> i32 {write_c} as unsafe extern "C" fn(*mut c_void, *mut u8, i32) -> i32

rsmpeg-0.15.0+ffmpeg.7.0\src\avformat\avio.rs:125:51
|
125 | write_packet.is_some().then_some( write_c as _), //write_c as _
| ^^^^^^^^^^^^ invalid cast

[ldm0]

You can check the comment above: https://github.com/larksuite/rsmpeg/blob/master/src/avformat/avio.rs#L124

It seems that you are using FFmpeg 6.*. Please import rsmpeg like this:

rsmpeg = { version = "0.15.0", default-features = false, features = ["ffmpeg6"] }