[Interest] Qt 6.8.0 - FFMPEG on Windows - Is it possible?

[Nuno Santos]

Joger,

Thanks for your reply.

It seems that I have failed this little detail:

-DQT_DEPLOY_FFMPEG=ON

Also, is it possible to statically link ffmpeg to Qt? Or will we always need to have the dlls somewhere?

One thing that I still couldn’t figure out is what are the main advantages of using ffmpeg as backend compared with the native backends?

Thank you!

Best,

Nuno

> On 14 Oct 2024, at 17:42, Jøger Hansegård <joger.hansegard at qt.io> wrote:
> 
> There is also some information in the official Qt documentation; see: https://doc.qt.io/qt-6/qtmultimedia-building-from-source.html
> 
> Best regards,
> Jøger Hansegård,
> The Qt Company
> 
> 
> -----Original Message-----
> From: Interest <interest-bounces at qt-project.org> On Behalf Of Jøger Hansegård via Interest
> Sent: Monday, October 14, 2024 6:21 PM
> To: Nuno Santos <nuno.santos at imaginando.pt>; interestqt-project. org <interest at qt-project.org>
> Subject: Re: [Interest] Qt 6.8.0 - FFMPEG on Windows - Is it possible?
> 
> Hi Nuno,
> 
> Yes, this is possible, and we are working on improving the documentation on how to do it. In the meantime, this is one way to do it:
> 
> 1. Download FFmpeg built with shared libraries from one of the links below.
> 2. After unzipping the FFmpeg binaries to a suitable location, configure Qt:
> 
>    configure.bat <your normal settings> -- -DFFMPEG_DIR=<path to directory containing FFmpeg include/lib/bin folders> -DQT_DEPLOY_FFMPEG=ON
> 
> Note the double '--' that separates configure arguments from CMake arguments. Once this is done, you can build Qt as usual.
> 
> Be aware that he FFmpeg version in the link below is a GPL build. If this is not suitable for you, I added a link to my unofficial wiki page that describes different ways to build FFmpeg for Windows. This gives you control over building FFmpeg without any GPL or non-free components. Among the described options, using VCpkg is the simplest.
> 
> Download links:
> FFmpeg for Windows (GPL): https://ffmpeg.org/download.html#build-windows (use the ones from BtbN, direct link: https://github.com/BtbN/FFmpeg-Builds/releases). It contains shared libraries and FFmpeg header files.
> Building FFmpeg: https://wiki.qt.io/User:Joger/Building_Qt_Multimedia_with_FFmpeg
> 
> Thanks,
> Jøger
> The Qt Company
> 
> -----Original Message-----
> From: Interest <interest-bounces at qt-project.org> On Behalf Of Nuno Santos via Interest
> Sent: Monday, October 14, 2024 5:04 PM
> To: interestqt-project. org <interest at qt-project.org>
> Subject: [Interest] Qt 6.8.0 - FFMPEG on Windows - Is it possible?
> 
> Hi,
> 
> I do I enable FFMPEG backend on Windows?
> 
> Is it even possible?
> 
>> configure.bat -help
> 
> does not have any mention to it.
> 
> Thanks!
> 
> Regards,
> 
> Nuno
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