ubuntu 22.04: libreoffice impress + media = crash

[hiller at mpia-hd.mpg.de]

Hello,
when trying to play a media file (tested with avi, mp4) 
libreoffice crashes on ubuntu 22.04 with the message:
 

(soffice:12610): GStreamer-CRITICAL **: 19:24:50.307: gst_caps_from_string: assertion 'string' failed

(soffice:12610): GStreamer-CRITICAL **: 19:24:50.307: gst_pad_template_new: assertion 'caps != NULL' failed

(soffice:12610): GStreamer-CRITICAL **: 19:24:50.307: gst_mini_object_unref: assertion 'mini_object != NULL' failed

(soffice:12610): GStreamer-CRITICAL **: 19:24:50.307: gst_element_class_add_pad_template: assertion 'GST_IS_PAD_TEMPLATE (templ)' failed

(soffice:12610): GStreamer-Video-CRITICAL **: 19:24:50.307: gst_video_decoder_init: assertion 'pad_template != NULL' failed

(soffice:12610): GStreamer-WARNING **: 19:24:50.307: Element vaapidecode0 has an ALWAYS template src, but no pad of the same name


Fatal exception: Signal 11
Stack:
/usr/lib/libreoffice/program/libuno_sal.so.3(+0x41eb3)[0x7fad837f2eb3]
/usr/lib/libreoffice/program/libuno_sal.so.3(+0x42074)[0x7fad837f3074]
/lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7fad835ab520]
/lib/x86_64-linux-gnu/libc.so.6(pthread_mutex_destroy+0x5)[0x7fad836005f5]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(g_rec_mutex_clear+0x10)[0x7fad82d462a0]
/lib/x86_64-linux-gnu/libgstvideo-1.0.so.0(+0x32f7c)[0x7fad62547f7c]
/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_object_unref+0x1fd)[0x7fad82dfedfd]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(+0x4a4a0)[0x7fad4e7274a0]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(gst_bin_remove+0x11b)[0x7fad4e7226eb]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(+0x45e0b)[0x7fad4e722e0b]
/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_object_unref+0x131)[0x7fad82dfed31]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(+0x4a4a0)[0x7fad4e7274a0]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(gst_bin_remove+0x11b)[0x7fad4e7226eb]
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so(+0x1935f)[0x7fad4e3d935f]
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so(+0x1abdc)[0x7fad4e3dabdc]
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so(+0x1ae9e)[0x7fad4e3dae9e]
/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_closure_invoke+0x16f)[0x7fad82df0d2f]
/lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x30b76)[0x7fad82e0cb76]
/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit_valist+0x11a4)[0x7fad82e0e554]
/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit+0x93)[0x7fad82e0e7a3]
/lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x1f284)[0x7fad82dfb284]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(+0x40db8)[0x7fad4e71ddb8]
/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_object_notify_by_pspec+0x14a)[0x7fad82dff05a]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(+0x902b7)[0x7fad4e76d2b7]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(gst_pad_push_event+0x40b)[0x7fad4e771b6b]
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvideoparsersbad.so(+0x19841)[0x7fad4e328841]
/lib/x86_64-linux-gnu/libgstbase-1.0.so.0(+0x28238)[0x7fad4e63e238]
/lib/x86_64-linux-gnu/libgstbase-1.0.so.0(+0x28e6e)[0x7fad4e63ee6e]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(+0x8f68d)[0x7fad4e76c68d]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(+0x92c29)[0x7fad4e76fc29]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(gst_pad_push+0xde)[0x7fad4e77004e]
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstcoreelements.so(+0x32aa0)[0x7fad4e48baa0]
/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0(+0xb9f37)[0x7fad4e796f37]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(+0x876a4)[0x7fad82d296a4]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(+0x84a41)[0x7fad82d26a41]
/lib/x86_64-linux-gnu/libc.so.6(+0x94b43)[0x7fad835fdb43]
/lib/x86_64-linux-gnu/libc.so.6(+0x126a00)[0x7fad8368fa00]

These are the installed gstreamer packages:
gir1.2-gstreamer-1.0:amd64
gstreamer1.0-alsa:amd64
gstreamer1.0-clutter-3.0:amd64
gstreamer1.0-gl:amd64
gstreamer1.0-gtk3:amd64
gstreamer1.0-libav:amd64
gstreamer1.0-nice:amd64
gstreamer1.0-pipewire:amd64
gstreamer1.0-plugins-bad:amd64
gstreamer1.0-plugins-base:amd64
gstreamer1.0-plugins-good:amd64
gstreamer1.0-plugins-ugly:amd64
gstreamer1.0-pulseaudio:amd64
gstreamer1.0-vaapi:amd64
gstreamer1.0-x:amd64
libgstreamer-gl1.0-0:amd64
libgstreamer-plugins-bad1.0-0:amd64
libgstreamer-plugins-base1.0-0:amd64
libgstreamer-plugins-good1.0-0:amd64
libgstreamer1.0-0:amd64

Is there anything missing?
How can i debug the problem?

Thank you in advance for any hint, ulrich