Same issue. No more .avi thumbnail within pcmanfm. ffmpegthumbnailer is installed.
$ gio info -a standard::content-type vid.avi
$ (gio info:1185055): GLib-GIO-CRITICAL **: 12:46:36.112: GFileInfo created without standard::name
(gio info:1185055): GLib-GIO-CRITICAL **: 12:46:36.112: file ../glib/gio/gfileinfo.c: line 1699 (g_file_info_get_name): should not be reached
uri : file:///home/steph/Vid%C3%A9os/Pas%20vus/vid.avi
chemin local : /home/steph/Vidéos/Pas vus/vid.avi
montage unix : /dev/sde1 /home ext4 rw,noatime
attributs :
standard::content-type: video/vnd.avi
Okay let’s hope that it’s fixed then.
Right now it’s really unreliable, sometimes the audio works (via Bluetooth or internal speakers) but often it doesn’t for whatever reason.