Revert "Bump ffmpeg version and nv-codec-headers" (#2989)

* Revert "Bump ffmpeg version and nv-codec-headers (#2973)"

This reverts commit cad6713.

* Revert "Update CUDA build version from 11.7.1 to 12.0.0 (#2978)"

This reverts commit 6c09a9f.

* Reapply "Update CUDA build version from 11.7.1 to 12.0.0 (#2978)"

This reverts commit ebbf210.

* Force ffmpeg reinstall

* Revert "Force ffmpeg reinstall"

This reverts commit 5adb9a5.

---------

Co-authored-by: Victor Elias <victorgelias@gmail.com>

install_ffmpeg.sh

@@ -116,7 +116,7 @@ if [[ "$GOOS" != "darwin" ]]; then
   if [[ ! -e "$ROOT/nv-codec-headers" ]]; then
     git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git "$ROOT/nv-codec-headers"
     cd $ROOT/nv-codec-headers
-    git checkout n12.1.14.0
+    git checkout n9.1.23.1
     make -e PREFIX="$ROOT/compiled"
     make install -e PREFIX="$ROOT/compiled"
   fi
@@ -203,8 +203,9 @@ else
 fi
 
 if [[ ! -e "$ROOT/ffmpeg/libavcodec/libavcodec.a" ]]; then
-  git clone https://github.com/livepeer/FFmpeg-6.1.1.git "$ROOT/ffmpeg" || echo "FFmpeg dir already exists"
+  git clone https://github.com/livepeer/FFmpeg.git "$ROOT/ffmpeg" || echo "FFmpeg dir already exists"
   cd "$ROOT/ffmpeg"
+  git checkout 2e18d069668c143f3c251067abd25389e411d022
   ./configure ${TARGET_OS:-} $DISABLE_FFMPEG_COMPONENTS --fatal-warnings \
     --enable-libx264 --enable-gpl \
     --enable-protocol=rtmp,file,pipe \