以下を吐いてparoleがクラッシュする
libva info: VA-API version 1.14.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_14
libva error: /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so init failed
libva info: va_openDriver() returns 1
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_10
libva info: va_openDriver() returns 0
(parole:197927): GStreamer-CRITICAL **: 13:49:06.355: gst_caps_from_string: assertion 'string' failed
(parole:197927): GStreamer-CRITICAL **: 13:49:06.355: gst_pad_template_new: assertion 'caps != NULL' failed
(parole:197927): GStreamer-CRITICAL **: 13:49:06.355: gst_mini_object_unref: assertion 'mini_object != NULL' failed
(parole:197927): GStreamer-CRITICAL **: 13:49:06.356: gst_element_class_add_pad_template: assertion 'GST_IS_PAD_TEMPLATE (templ)' failed
(parole:197927): GStreamer-Video-CRITICAL **: 13:49:06.356: gst_video_decoder_init: assertion 'pad_template != NULL' failed
(parole:197927): GStreamer-WARNING **: 13:49:06.356: Element vaapidecode0 has an ALWAYS template src, but no pad of the same name
Segmentation fault (コアダンプ)
解決
sudo apt purge gstreamer1.0-vaapi