downgrade libva, include vainfo in docker (#936)

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - When all audio streams are selected with `HLS Direct`, explicitly copy them without transcoding
   - This only happens when the channel does not have a `Preferred Audio Language`
 - Fix scanner crash caused by invalid mtime
+- `VAAPI`: Downgrade libva from 2.15 to 2.14
 
 ## [0.6.6-beta] - 2022-08-17
 ### Fixed

docker/vaapi/ffmpeg.Dockerfile

@@ -17,9 +17,10 @@ RUN apt-get update && DEBIAN_FRONTEND="noninteractive" apt-get install -y libicu
     cmake \
     wget \
     mesa-va-drivers \
+    vainfo \
     && mkdir /tmp/intel && cd /tmp/intel \
-    && wget -O - https://github.com/intel/libva/archive/refs/tags/2.15.0.tar.gz | tar zxf - \
-    && cd libva-2.15.0 \
+    && wget -O - https://github.com/intel/libva/archive/refs/tags/2.14.0.tar.gz | tar zxf - \
+    && cd libva-2.14.0 \
     && ./autogen.sh \
     && ./configure \
     && make -j$(nproc) \