can't play .avi from gvfs network shares

[David Condinese]

Parole and Totem give popup gstreamer backend error, VLC and gnome-mpv/mpv simply crash, when trying to play AVI files from a GVFS mount. Can reproduce in Lubuntu and Xubuntu, 32 and 64 bit, installed and Live.

Debug info from Totem and Parole

Totem:
(totem:4215): GLib-CRITICAL **: 08:51:36.911: g_key_file_load_from_file: assertion 'file != NULL' failed
totem-video-thumbnailer couldn't open file 'file:///run/user/1000/gvfs/smb-share:server=elements,share=xbmc_library/Movies/6ixtynin9.avi'

(totem:4215): Gtk-WARNING **: 08:51:46.687: Calling org.xfce.Session.Manager.Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Method "Inhibit" with signature "susu" on interface "org.xfce.Session.Manager" doesn't exist

Parole Debug=3
0:00:05.556746025 4960 0x55fc44972320 WARN basesrc gstbasesrc.c:3583:gst_base_src_start_complete:<source> pad not activated yet
0:00:05.560470739 4960 0x55fc44972320 WARN basesrc gstbasesrc.c:3583:gst_base_src_start_complete:<source> pad not activated yet
0:00:06.194216272 4960 0x7f2e180036d0 WARN decodebin gstdecodebin2.c:4653:gst_decode_bin_expose:<decodebin0> All streams finished without buffers. Last group: 1
0:00:06.194260048 4960 0x7f2e180036d0 WARN decodebin gstdecodebin2.c:4656:gst_decode_bin_expose:<decodebin0> error: all streams without buffers
0:00:06.238682455 4960 0x55fc44972320 WARN gio_base_src gstgiobasesrc.c:155:gst_gio_base_src_stop:<source> warning: g_input_stream_close failed: Software caused connection abort

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: parole 1.0.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed May 9 08:57:44 2018
SourcePackage: parole
UpgradeStatus: No upgrade log present (probably fresh install)

[David Condinese (bcentsale)]

Update

The problem seems to occur when connecting to shares on a Synology NAS. Shared files on an actual Windows box play normally. Suspect it has something to do with Synology's Samba implementation.

[David Condinese (bcentsale)]

Not a Ubuntu bug. Confirmed a config setting in Synology's Samba implementation. Default SMB protocol was SMB1.0/2.0. Changed to include SMB3.0 resolved issue.