diff --git a/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/tg_owt.nix b/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/tg_owt.nix
index e2f3c4ba884e..5dcfd895f5ed 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/tg_owt.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/tg_owt.nix
@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , fetchFromGitHub
+, fetchpatch2
 , pkg-config
 , cmake
 , ninja
@@ -42,6 +43,18 @@ stdenv.mkDerivation {
     fetchSubmodules = true;
   };
 
+  patches = [
+    # Remove usage of AVCodecContext::reordered_opaque
+    (fetchpatch2 {
+      name = "webrtc-ffmpeg-7.patch";
+      url = "https://webrtc.googlesource.com/src/+/e7d10047096880feb5e9846375f2da54aef91202%5E%21/?format=TEXT";
+      decode = "base64 -d";
+      stripLen = 1;
+      extraPrefix = "src/";
+      hash = "sha256-EdwHeVko8uDsP5GTw2ryWiQgRVCAdPc1me6hySdiwMU=";
+    })
+  ];
+
   postPatch = lib.optionalString stdenv.isLinux ''
     substituteInPlace src/modules/desktop_capture/linux/wayland/egl_dmabuf.cc \
       --replace '"libEGL.so.1"' '"${libGL}/lib/libEGL.so.1"' \
diff --git a/pkgs/applications/networking/instant-messengers/telegram/telegram-desktop/tg_owt.nix b/pkgs/applications/networking/instant-messengers/telegram/telegram-desktop/tg_owt.nix
index 64541fc79e97..425b82f15d9b 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/telegram-desktop/tg_owt.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/telegram-desktop/tg_owt.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch2,
   pkg-config,
   cmake,
   crc32c,
@@ -41,6 +42,18 @@ stdenv.mkDerivation {
     fetchSubmodules = true;
   };
 
+  patches = [
+    # Remove usage of AVCodecContext::reordered_opaque
+    (fetchpatch2 {
+      name = "webrtc-ffmpeg-7.patch";
+      url = "https://webrtc.googlesource.com/src/+/e7d10047096880feb5e9846375f2da54aef91202%5E%21/?format=TEXT";
+      decode = "base64 -d";
+      stripLen = 1;
+      extraPrefix = "src/";
+      hash = "sha256-EdwHeVko8uDsP5GTw2ryWiQgRVCAdPc1me6hySdiwMU=";
+    })
+  ];
+
   outputs = [
     "out"
     "dev"
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9f5c81d8817a..f4fedad74d54 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9350,7 +9350,7 @@ with pkgs;
   lesspipe = callPackage ../tools/misc/lesspipe { };
 
   liquidsoap = callPackage ../tools/audio/liquidsoap/full.nix {
-    ffmpeg = ffmpeg-full;
+    ffmpeg = ffmpeg_6-full;
     ocamlPackages = ocaml-ng.ocamlPackages_4_14;
   };
 
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 51163610fe95..7882604f7dd9 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -510,31 +510,31 @@ let
 
     ffmpeg = callPackage ../development/ocaml-modules/ffmpeg { };
     ffmpeg-av = callPackage ../development/ocaml-modules/ffmpeg/ffmpeg-av.nix {
-      inherit (pkgs) ffmpeg;
+      ffmpeg = pkgs.ffmpeg_6;
       inherit (pkgs.darwin.apple_sdk.frameworks) AudioToolbox VideoToolbox;
     };
     ffmpeg-avcodec = callPackage ../development/ocaml-modules/ffmpeg/ffmpeg-avcodec.nix {
-      inherit (pkgs) ffmpeg;
+      ffmpeg = pkgs.ffmpeg_6;
       inherit (pkgs.darwin.apple_sdk.frameworks) AudioToolbox VideoToolbox;
     };
     ffmpeg-avdevice = callPackage ../development/ocaml-modules/ffmpeg/ffmpeg-avdevice.nix {
-      inherit (pkgs) ffmpeg;
+      ffmpeg = pkgs.ffmpeg_6;
       inherit (pkgs.darwin.apple_sdk.frameworks) AppKit AudioToolbox AVFoundation Cocoa CoreImage ForceFeedback OpenGL VideoToolbox;
     };
     ffmpeg-avfilter = callPackage ../development/ocaml-modules/ffmpeg/ffmpeg-avfilter.nix {
-      inherit (pkgs) ffmpeg;
+      ffmpeg = pkgs.ffmpeg_6;
       inherit (pkgs.darwin.apple_sdk.frameworks) AppKit CoreImage OpenGL VideoToolbox;
     };
     ffmpeg-avutil = callPackage ../development/ocaml-modules/ffmpeg/ffmpeg-avutil.nix {
-      inherit (pkgs) ffmpeg;
+      ffmpeg = pkgs.ffmpeg_6;
       inherit (pkgs.darwin.apple_sdk.frameworks) AudioToolbox VideoToolbox;
     };
     ffmpeg-swresample = callPackage ../development/ocaml-modules/ffmpeg/ffmpeg-swresample.nix {
-      inherit (pkgs) ffmpeg;
+      ffmpeg = pkgs.ffmpeg_6;
       inherit (pkgs.darwin.apple_sdk.frameworks) VideoToolbox;
     };
     ffmpeg-swscale = callPackage ../development/ocaml-modules/ffmpeg/ffmpeg-swscale.nix {
-      inherit (pkgs) ffmpeg;
+      ffmpeg = pkgs.ffmpeg_6;
       inherit (pkgs.darwin.apple_sdk.frameworks) VideoToolbox;
     };