Syncplay fails with "Unhandled Error" and stacktrace

[gnull]

Syncplay fails on my Archlinux machine with the following error. I see the error with both VLC and MPV. Is there anything I can do to fix it?

Could not import GUI libraries. If you do not have PySide installed then you will need to install it for the GUI to work.
[12:52:05] Attempting to connect to syncplay.pl:8999
[12:52:05] This client does not support TLS
[12:52:05] Successfully reached syncplay.pl (151.80.32.178)
Unhandled Error
Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/twisted/python/log.py", line 103, in callWithLogger
    return callWithContext({"system": lp}, func, *args, **kw)
  File "/usr/lib/python3.8/site-packages/twisted/python/log.py", line 86, in callWithContext
    return context.call({ILogContext: newCtx}, func, *args, **kw)
  File "/usr/lib/python3.8/site-packages/twisted/python/context.py", line 122, in callWithContext
    return self.currentContext().callWithContext(ctx, func, *args, **kw)
  File "/usr/lib/python3.8/site-packages/twisted/python/context.py", line 85, in callWithContext
    return func(*args,**kw)
--- <exception caught here> ---
  File "/usr/lib/python3.8/site-packages/twisted/internet/posixbase.py", line 614, in _doReadOrWrite
    why = selectable.doRead()
  File "/usr/lib/python3.8/site-packages/twisted/internet/tcp.py", line 243, in doRead
    return self._dataReceived(data)
  File "/usr/lib/python3.8/site-packages/twisted/internet/tcp.py", line 249, in _dataReceived
    rval = self.protocol.dataReceived(data)
  File "/usr/lib/python3.8/site-packages/twisted/internet/endpoints.py", line 132, in dataReceived
    return self._wrappedProtocol.dataReceived(data)
  File "/usr/lib/python3.8/site-packages/twisted/protocols/basic.py", line 572, in dataReceived
    why = self.lineReceived(line)
  File "/usr/lib/syncplay/syncplay/protocols.py", line 55, in lineReceived
    self.handleMessages(messages)
  File "/usr/lib/syncplay/syncplay/protocols.py", line 26, in handleMessages
    self.handleSet(message[1])
  File "/usr/lib/syncplay/syncplay/protocols.py", line 195, in handleSet
    self._client.playlist.changeToPlaylistIndex(values['index'], user, resetPosition=resetPosition)
  File "/usr/lib/syncplay/syncplay/client.py", line 1723, in changeToPlaylistIndex
    if self.loadDelayedPath(index):
  File "/usr/lib/syncplay/syncplay/client.py", line 1698, in loadDelayedPath
    self._client.openFile(delayedLoadPath, resetPosition=True, fromUser=True)
  File "/usr/lib/syncplay/syncplay/client.py", line 564, in openFile
    self._player.openFile(filePath, resetPosition)
builtins.AttributeError: 'NoneType' object has no attribute 'openFile'

[12:52:05] Connection with server lost, attempting to reconnect
[12:52:05] This client does not support TLS

Hello username,

The Syncplay latest is available from http://syncplay.pl/


[12:52:05] Successfully connected to server
[12:52:08] Connection with server lost, attempting to reconnect

I ran it with the command

syncplay --player-path /bin/vlc -r room -a syncplay.pl:8999 -n username file.mpv

[Et0h]

Sounds like it might be a PySide issue. You might find some useful information in #321, #341 and #335. Does it work when you run Syncplay with --no-gui?

[gnull]

I still see the same error with --no-gui.

But I seem to have found a workaround: I run syncplay --player-path /bin/vlc -r room -a syncplay.pl:8999 -n username without specifying a video file to play, then manually do File→Open in VLC, this way it opens the file and plays it synchronized with other clients with no errors.

Thank you for the references, I will check them out.

[Et0h]

@gnull Please try adding the following to the top of def loadDelayedPath(self, changeToIndex): just below # Implementing the behaviour set out at https://github.com/Syncplay/syncplay/issues/315 in client.py and let me know if it fixes it for loading with a path specified:

        if self._client.playerIsNotReady():
            self._client.addPlayerReadyCallback(lambda x: self.loadDelayedPath(changeToIndex))
            return

[gnull]

@Et0h With the lines you provided it works perfectly. Thanks a lot!

[Et0h]

Great, I've pushed the fix to the main repo now.