switch nginx-vod-module to the maintained dio-az fork (#24123)

The `v1.x` line is the same muxed fMP4 code as Kaltura's 1.31 with fixes backported, so the mapping JSON, manifest routes, and ffmpeg consumers are unchanged. The `MAX_CLIPS` patch applies as-is and the HEVC workaround is rewritten for the fork's reformatted source.

`vod_hls_version 6` is now explicit because the fork replaced Kaltura's automatic version calculation with a directive that defaults to 4 and only warns when fmp4 needs 6, so playlists were being stamped `EXT-X-VERSION:4` while carrying `EXT-X-MAP`. The `error_page 502 =404` hack is gone: https://github.com/kaltura/nginx-vod-module/issues/468 is a `vod_mode remote` bug and we're `mapped`, so those 502s were really `_vod_response` returning 404 upstream. The fork maps that through now, and the hack was also turning real 5xx into "no recordings".

docker/main/build_nginx.sh

@@ -3,7 +3,7 @@
 set -euxo pipefail
 
 NGINX_VERSION="1.27.4"
-VOD_MODULE_VERSION="1.31"
+VOD_MODULE_VERSION="v1.9.1"
 SECURE_TOKEN_MODULE_VERSION="1.5"
 SET_MISC_MODULE_VERSION="v0.33"
 NGX_DEVEL_KIT_VERSION="v0.3.3"
@@ -31,24 +31,24 @@ wget -nv https://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz
 tar -zxf nginx-${NGINX_VERSION}.tar.gz -C /tmp/nginx --strip-components=1
 rm nginx-${NGINX_VERSION}.tar.gz
 mkdir /tmp/nginx-vod-module
-wget -nv https://github.com/kaltura/nginx-vod-module/archive/refs/tags/${VOD_MODULE_VERSION}.tar.gz
+wget -nv https://github.com/dio-az/nginx-vod-module/archive/refs/tags/${VOD_MODULE_VERSION}.tar.gz
 tar -zxf ${VOD_MODULE_VERSION}.tar.gz -C /tmp/nginx-vod-module --strip-components=1
 rm ${VOD_MODULE_VERSION}.tar.gz
     # Patch MAX_CLIPS to allow more clips to be added than the default 128
 sed -i 's/MAX_CLIPS (128)/MAX_CLIPS (1080)/g' /tmp/nginx-vod-module/vod/media_set.h
 patch -d /tmp/nginx-vod-module/ -p1 << 'EOF'
---- a/vod/avc_hevc_parser.c       2022-06-27 11:38:10.000000000 +0000
-+++ b/vod/avc_hevc_parser.c       2023-01-16 11:25:10.900521298 +0000
-@@ -3,6 +3,9 @@
+--- a/vod/avc_hevc_parser.c
++++ b/vod/avc_hevc_parser.c
+@@ -2,6 +2,9 @@
+
  bool_t
- avc_hevc_parser_rbsp_trailing_bits(bit_reader_state_t* reader)
- {
+ avc_hevc_parser_rbsp_trailing_bits(bit_reader_state_t* reader) {
 +	// https://github.com/blakeblackshear/frigate/issues/4572
 +	return TRUE;
 +
  	uint32_t one_bit;
 
- 	if (reader->stream.eof_reached)
+ 	if (reader->stream.eof_reached) {
 EOF
 
 

docker/main/rootfs/usr/local/nginx/conf/nginx.conf

@@ -122,6 +122,10 @@ http {
             # Smaller segments, faster generation, better browser compatibility
             vod_hls_container_format fmp4;
 
+            # fMP4 playlists use EXT-X-MAP, which requires HLS protocol
+            # version 6 (RFC 8216 section 7); the module default is 4
+            vod_hls_version 6;
+
             secure_token $args;
             secure_token_types application/vnd.apple.mpegurl;
 
@@ -130,14 +134,6 @@ http {
             expires off;
 
             keepalive_disable safari;
-
-            # vod module returns 502 for non-existent media
-            # https://github.com/kaltura/nginx-vod-module/issues/468
-            error_page 502 =404 /vod-not-found;
-        }
-
-        location = /vod-not-found {
-            return 404;
         }
 
         location /stream/ {

web/src/components/player/GenericVideoPlayer.tsx

@@ -32,8 +32,8 @@ export function GenericVideoPlayer({
     const checkSourceExists = async (url: string) => {
       try {
         const response = await fetch(url, { method: "HEAD" });
-        // nginx vod module returns 502 for non existent media
-        // https://github.com/kaltura/nginx-vod-module/issues/468
+        // missing media is a 404; 502 still covers a failed or
+        // unreachable mapping request, which is equally unplayable
         setSourceExists(response.status !== 502 && response.status !== 404);
       } catch (error) {
         setSourceExists(false);