moving to libVLC 4.0

[MikOfClassX]

Hello,

I would like to move my codebase to libVLC 4.0 from 3.0.x.

Is it api-compatible ?
Are there any guide, hints, suggestions for a smooth 4.0 api adoption ?

Thanks,

Mik
--

[unidan]

Hi, it should have nearly zero API breakage, but libvlc 4.0 is not available as a release yet so there is no migration guide.

[mfkl]

Try a diff of the file `lib/libvlc.sym` from 3.0 and master.

[Jean-Baptiste Kempf]

Be careful, though, for once, we break ABI compatibility in 4.0

[MikOfClassX]

So, a basic recompile of my code would be sufficient, right ?

[Jean-Baptiste Kempf]

Yes

[MikOfClassX]

The good news ? All my tests are OK with 4.0 (win10 x64).

Other news ?
- no speed improvements for (a)rgb video callbacks (still the LAV directshow filters are ouperforming libVLC by about 30-40% with 4k clips. That's strange)
- the DEV version still gives no accurate media timing api. See: https://forum.videolan.org/viewtopic.php?f=32&t=148843
- I am getting some "main filter error: Failed to create video converter". Maybe my fault ?

[Jean-Baptiste Kempf]

- using vmem?
- you need a new api for this
- logs ?

[MikOfClassX]

- using vmem?

yes, i am using audio/video callbacks. Any other, more efficient way ?

- you need a new api for this

is there a new timing api in 4.0 ?

- logs ?

no current logs atm. I'll try to get them.

[Jean-Baptiste Kempf]

- 4.0 allows to have GPU sharing of textures, which should remove most CPU for that.
- There will be, yes. It's not exposed.
- please.

[MikOfClassX]

about 4.0 GPU texture sharing, is already there ? Any example ?

[unidan]

Hi, it's using https://www.videolan.org/developers/vlc ... 4319649b70 and you can find examples here https://code.videolan.org/robUx4/vlc/tr ... doc/libvlc

It's half-merged (the d3d par isn't in master yet), but openGL is available: https://code.videolan.org/robUx4/vlc/bl ... player.cpp

[MikOfClassX]

oh, good reference! Thanks