Correctly calculate ffmpeg version based on ffmpeg path

docker/main/rootfs/etc/s6-overlay/s6-rc.d/frigate/run

@@ -42,8 +42,14 @@ function migrate_db_path() {
     fi
 }
 
+function set_libva_version() {
+    local ffmpeg_path=$(python3 /usr/local/ffmpeg/get_ffmpeg_path.py)
+    export LIBAVFORMAT_VERSION_MAJOR=$($ffmpeg_path -version | grep -Po "libavformat\W+\K\d+")
+}
+
 echo "[INFO] Preparing Frigate..."
 migrate_db_path
+set_libva_version
 echo "[INFO] Starting Frigate..."
 
 cd /opt/frigate || echo "[ERROR] Failed to change working directory to /opt/frigate"

docker/main/rootfs/etc/s6-overlay/s6-rc.d/go2rtc/run

@@ -43,6 +43,11 @@ function get_ip_and_port_from_supervisor() {
     export FRIGATE_GO2RTC_WEBRTC_CANDIDATE_INTERNAL="${ip_address}:${webrtc_port}"
 }
 
+function set_libva_version() {
+    local ffmpeg_path=$(python3 /usr/local/ffmpeg/get_ffmpeg_path.py)
+    export LIBAVFORMAT_VERSION_MAJOR=$($ffmpeg_path -version | grep -Po "libavformat\W+\K\d+")
+}
+
 if [[ -f "/dev/shm/go2rtc.yaml" ]]; then
     echo "[INFO] Removing stale config from last run..."
     rm /dev/shm/go2rtc.yaml
@@ -61,6 +66,8 @@ else
     echo "[WARNING] Unable to remove existing go2rtc config. Changes made to your frigate config file may not be recognized. Please remove the /dev/shm/go2rtc.yaml from your docker host manually."
 fi
 
+set_libva_version
+
 readonly config_path="/config"
 
 if [[ -x "${config_path}/go2rtc" ]]; then