On Thu, Aug 31, 2017 at 9:15 AM Dan Dennedy <d...@dennedy.org> wrote:
> On Thu, Aug 31, 2017 at 9:13 AM Ricardo Jimenez Hurtado <
> jimenezhurtadorica...@gmail.com> wrote:
>
>> I have compile the mlt with sdl2 support and i obtain a blank screen
>> without video, I have disabled the sdl2 support in configure file and the
>> output is ok
>>
>> I am usir Ubuntu 16.04 with nVidia GTX950 graphics card
>>
>>
> I have the same problem, but it is working for me on macOS. I do not yet
> know the reason and have had limited time to spend on it. Use SDL 1.2 or an
> older MLT version in the meantime.
>
Upon further investigation, this is due to using threads in MLT and trying
to do things with SDL2 not on the main thread. One solution is put the SDL2
video code into melt.c, and perhaps only have sdl_audio in the module.
However, that does not help melted or perhaps other applications.
There can be a more complicated solution involving putting display events
into a queue on the SDL consumer thread, receiving them in the melt.c main
thread, and subsequently firing an mlt_event (non-queued) on the sdl
consumer for the video display. However, that does not help other apps
either without major changes to them.
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