libmpv.so.1 not found (when libmpv is already installed) - fixable but hacky

[yashasolutions]

The problem

error while loading shared libraries: libmpv.so.1

$ python counter.py
/home/user/.flet/bin/flet-0.21.1/flet/flet: error while loading shared libraries: libmpv.so.1: cannot open shared object file: No such file or directory
Traceback (most recent call last):
  File "/home/user/code/flet/counter.py", line 29, in <module>
    flet.app(target=main)
  File "/home/user/code/flet/.venv/lib/python3.11/site-packages/flet_runtime/app.py", line 70, in app
    return asyncio.run(
           ^^^^^^^^^^^^
  File "/usr/lib/python3.11/asyncio/runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/asyncio/base_events.py", line 653, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/home/user/code/flet/.venv/lib/python3.11/site-packages/flet_runtime/app.py", line 207, in app_async
    await conn.close()
  File "/home/user/code/flet/.venv/lib/python3.11/site-packages/flet_runtime/flet_socket_server.py", line 191, in close
    if self.__receive_loop_task:
       ^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'FletSocketServer' object has no attribute '_FletSocketServer__receive_loop_task'. Did you mean: '_FletSocketServer__receive_loop'?

However, mpv is installed on the system (linux Arch):

$ ls -l /usr/lib/libmpv.so*
libmpv.so        libmpv.so.2      libmpv.so.2.2.0

The hacky fix

so a quick symlink can fix the problem:

 sudo ln -s /usr/lib/libmpv.so /usr/lib/libmpv.so.1

and then it works but I am sure the dependency resolution could figure this out on its own without this kind solution.

(side note: just found about Flet today, it looks amazing, can't wait to give a go with a real project)

[Lucifer516-hp]

well, for me I had to link the libraries again and again and still no improved, had to link libmpv, libmujs, lua5.2 and then jepg turbo still no improvement

[syleishere]

apt install libmpv1 this works for me at least under ubuntu 22.04

I do however get following: ** (flet:29655): CRITICAL **: 03:35:11.411: void update_pressing_state(FlKeyEmbedderResponder *, uint64_t, uint64_t): assertion 'lookup_hash_table(self->pressing_records, physical_key) != 0' failed /usr/local/lib/python3.12/dist-packages/flet_core/page.py:292: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC). self.__expires_at = datetime.utcnow() + timedelta(

The counter app however does work as intended

[syleishere]

There is a bigger problem though

Picture on left is running as root, picture on right is running as normal user....

[syleishere]

Hmm this only happening with WSL Ubuntu-22.04, I don't see it happening as normal VM Ubuntu-22.04.

[Lucifer516-sudoer]

Can you try it on a arch vm ?

[syleishere]

You mean under WSL? Only reason I install Ubuntu 22.04LTS is 90% of developers develop there and all code examples use latest Ubuntu LTS distro, any reason you use arch? I could try it, I think I'd have to be persuaded though, my main go to OS is FreeBSD for anything that needs to run rock solid for a decade, with godly ports collection bigger than any other OS :) For flutter/flet I run flutter/flet under apache in FreeBSD as well.

My main development environment though is Windows 11, Ubuntu WSL. From there I can test windows, Linux, android and android TV with adb, as well as web with FreeBSD and apache.

I mean if you were gonna release an APP, you would want to install it mainly on google play store, apple store. Package it for windows/mac and offer it as a service under apache/nginx right? I may see a point if you are trying to run a GUI for a raspberry pi, other than that I can't see why anyone would run arch over FreeBSD.

Here are some instructions for running latest Ubuntu WSL under windows 11: https://blog.sunsaturn.com/wsl/using-wsl-as-regular-linux-host-on-same-network-with-10-gigabit-and-nfs/

[lokcito]

In Debian 12 - Debian GNU/Linux 12 (bookworm) Being root: apt install libmpv-dev mpv dpkg -L libmpv-dev the output is:

/usr /usr/include /usr/include/mpv /usr/include/mpv/client.h /usr/include/mpv/render.h /usr/include/mpv/render_gl.h /usr/include/mpv/stream_cb.h /usr/lib /usr/lib/x86_64-linux-gnu /usr/lib/x86_64-linux-gnu/pkgconfig /usr/lib/x86_64-linux-gnu/pkgconfig/mpv.pc /usr/share /usr/share/doc /usr/share/doc/libmpv-dev /usr/share/doc/libmpv-dev/changelog.Debian.gz /usr/share/doc/libmpv-dev/changelog.gz /usr/share/doc/libmpv-dev/copyright /usr/lib/x86_64-linux-gnu/libmpv.so

Then I've applied the symbol: ln -s /usr/lib/x86_64-linux-gnu/libmpv.so /usr/lib/libmpv.so.1

and it worked for me.

[loleg]

In the documentation it currently says "libmpv libraries must be installed if your Flet app uses Video control." This deserves more investigation, or the docs should be corrected if libmpv is a requirement for all projects.

[yashasolutions]

to add to @loleg, it would also be good to know which version is required, because I had libmpv, just libmpv.so.2 didn't cut it and it required libmpv.so.1