CI: remove U20.04 compat

+ update TODO for pipewire where still neeeded for Debian 11

.github/scripts/Linux/download_build_ffmpeg.sh

@@ -56,9 +56,6 @@ cd /var/tmp/ffmpeg
 git clone https://github.com/intel/cartwheel-ffmpeg.git
 git checkout "$(GIT_DIR=cartwheel-ffmpeg/.git git submodule status ffmpeg | sed 's/-\([[:xdigit:]]*\).*/\1/')"
 git am -3 cartwheel-ffmpeg/patches/*
-if [ "$(lsb_release -rs)" = 20.04 ]; then
-        git am -3 "$GITHUB_WORKSPACE/.github/scripts/Linux/ffmpeg-patches/0001-removed-bits-incompatible-with-old-vaapi.patch-noauto"
-fi
 install_aom
 install_libvpx
 install_nv_codec_headers

.github/scripts/Linux/ffmpeg-patches/0001-removed-bits-incompatible-with-old-vaapi.patch-noauto

@@ -1,36 +0,0 @@
-From 2e211a6d63db7a4c9232cfd9dc60553c563d6c64 Mon Sep 17 00:00:00 2001
-From: Martin Pulec <martin.pulec@cesnet.cz>
-Date: Wed, 16 Oct 2024 09:10:12 +0200
-Subject: [PATCH] removed bits incompatible with old vaapi
-
----
- libavcodec/vaapi_encode_h265.c | 6 ------
- 1 file changed, 6 deletions(-)
-
-diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
-index bb1944c505..e84c27611c 100644
---- a/libavcodec/vaapi_encode_h265.c
-+++ b/libavcodec/vaapi_encode_h265.c
-@@ -393,9 +393,6 @@ static int vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)
- 
-         .vui_parameters_present_flag = 0,
- 
--        .scc_fields.bits = {
--            .palette_mode_enabled_flag = sps->palette_mode_enabled_flag,
--        }
-     };
- 
-     *vpic = (VAEncPictureParameterBufferHEVC) {
-@@ -448,9 +445,6 @@ static int vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)
-             .enable_gpu_weighted_prediction = 0,
-             .no_output_of_prior_pics_flag   = 0,
-         },
--        .scc_fields.bits = {
--            .pps_curr_pic_ref_enabled_flag = pps->pps_curr_pic_ref_enabled_flag,
--        }
-     };
- 
-     if (pps->tiles_enabled_flag) {
--- 
-2.47.0
-

.github/scripts/Linux/install_others.sh

@@ -35,7 +35,8 @@ install_ndi() {(
         sudo cp -r NDI\ SDK\ for\ Linux/include/* /usr/local/include/
 )}
 
-# TODO: needed only for U20.04, remove after upgrading to U22.04
+# TODO: currently needed for Debian 11, which is used for ARM builds
+#       remove when not needed
 install_pipewire() {(
         if { [ "$ID" = ubuntu ] && [ "$VERSION_ID" = 20.04 ]; } ||
                 { [ "${ID_LIKE-$ID}" = debian ] && [ "$VERSION_ID" -le 11 ]; }