diff --git a/subprojects/gstreamer/libs/gst/helpers/ptp/ffi.rs b/subprojects/gstreamer/libs/gst/helpers/ptp/ffi.rs
index 0988765626..7b3ca372db 100644
--- a/subprojects/gstreamer/libs/gst/helpers/ptp/ffi.rs
+++ b/subprojects/gstreamer/libs/gst/helpers/ptp/ffi.rs
@@ -178,6 +178,8 @@ pub mod unix {
     #[cfg(not(any(target_os = "linux", target_os = "solaris", target_os = "illumos")))]
     pub const IF_NAMESIZE: usize = 16;
 
+    pub const PRIO_PROCESS: c_int = 0;
+
     extern "C" {
         #[cfg_attr(
             all(target_os = "macos", target_arch = "x86"),
@@ -220,6 +222,8 @@ pub mod unix {
 
         pub fn getifaddrs(ifap: *mut *mut ifaddrs) -> c_int;
         pub fn freeifaddrs(ifa: *mut ifaddrs);
+
+        pub fn setpriority(which: c_int, who: c_int, prio: c_int) -> c_int;
     }
 
     #[cfg(any(target_os = "linux", target_os = "solaris", target_os = "illumos"))]
diff --git a/subprojects/gstreamer/libs/gst/helpers/ptp/ptp_helper_post_install.sh b/subprojects/gstreamer/libs/gst/helpers/ptp/ptp_helper_post_install.sh
index 4370acd956..2ed427ed01 100755
--- a/subprojects/gstreamer/libs/gst/helpers/ptp/ptp_helper_post_install.sh
+++ b/subprojects/gstreamer/libs/gst/helpers/ptp/ptp_helper_post_install.sh
@@ -17,8 +17,8 @@ case "$with_ptp_helper_permissions" in
     ls -l "$ptp_helper"
     ;;
   capabilities)
-    echo "Calling $setcap cap_net_bind_service,cap_net_admin+ep $ptp_helper"
-    $setcap cap_net_bind_service,cap_net_admin+ep "$ptp_helper" || true
+    echo "Calling $setcap cap_sys_nice,cap_net_bind_service,cap_net_admin+ep $ptp_helper"
+    $setcap cap_sys_nice,cap_net_bind_service,cap_net_admin+ep "$ptp_helper" || true
     ;;
   none)
     echo "No perms/caps to set for $ptp_helper"
diff --git a/subprojects/gstreamer/libs/gst/helpers/ptp/thread.rs b/subprojects/gstreamer/libs/gst/helpers/ptp/thread.rs
index 9577e7e38d..eff363d600 100644
--- a/subprojects/gstreamer/libs/gst/helpers/ptp/thread.rs
+++ b/subprojects/gstreamer/libs/gst/helpers/ptp/thread.rs
@@ -11,6 +11,25 @@
 use crate::error::Error;
 
 pub fn set_priority() -> Result<(), Error> {
+    #[cfg(unix)]
+    {
+        use std::io;
+
+        use crate::{bail, ffi::unix::*};
+
+        // SAFETY: Setting the process priority can happen at any time. A negative
+        // priority require special permissions, which should've been given to the process.
+        //
+        // On error it returns a negative value.
+        unsafe {
+            if setpriority(PRIO_PROCESS, 0, -5) < 0 {
+                bail!(
+                    source: io::Error::last_os_error(),
+                    "Failed to set process priority"
+                );
+            }
+        }
+    }
     #[cfg(windows)]
     {
         use std::io;