Configurable encoder pipeline

src/utils.rs

@@ -0,0 +1,11 @@
+use ffmpeg_sys_next::av_make_error_string;
+use std::ffi::CStr;
+
+pub fn get_ffmpeg_error_msg(ret: libc::c_int) -> String {
+    unsafe {
+        const BUF_SIZE: usize = 512;
+        let mut buf: [libc::c_char; BUF_SIZE] = [0; BUF_SIZE];
+        av_make_error_string(buf.as_mut_ptr(), BUF_SIZE, ret);
+        String::from(CStr::from_ptr(buf.as_ptr()).to_str().unwrap())
+    }
+}