QTMultimedia FFMPEG backend preview
-
This post is deleted!
-
This post is deleted!
-
This post is deleted!
-
buimp .
-
Hi,
Did you check whether the plugin was deployed ?
If not, did you try to build it yourself ? -
@SGaist How would i check to see if it's deployed? and also there's no instructions anywhere on how to build the preview with FFMPEG included
-
@sethsource from Qt6.5, FFMPEG comes as default. Check the folder /plugins/multimedia and you will be able to see the plugin is there. If you use Qt6.4, you have to set QT_MEDIA_BACKEND. From all changes they are making, you may not be surprised by issues. Qt6.5 is under beta and Qt6.6 is under dev. I guess you have to be patient with this app.
-
QT6.4 didnt work with FFMPEG out of the box, as well as 6.6. I'll try 6.5.
-
Okay now we're getting somewhere. QT6.5 with msvc allows me to run my program without yelling at me. only thing now is it seems it wants me to specify a "decoding framework". heres the output:
Cant seem to find any environment variables on the internet that i can use.
Available HW decoding frameworks:
dxva2
d3d11va -
I read on an ffmpeg forum that people make the use of dxva2 and d3d11va through a command line argument for video...
"ffmpeg -hwaccel dxva2 -threads 1 -i INPUT -f null - -benchmark"but this is completely unrelated to QT. I attempted to use an envar for hwaccel and using command line arg and no difference.
