I am using Qt 5.9 based app which runs on embedded linux & android. The application processes real time data using OpenGL ES 3.0 & displays OpenGL textures at real time. I am displaying at the rate of 30+ frames per second which makes it pretty much real time & appears like a video.
I need to save an mp4 from a 30 to 40 frames that are displayed using OpenGL textures. As I understand, I can leverage Qt Multimedia to do this. But I lack the knowledge of how to do this. I am trying read & understand the how part from links like here & here.
One the mp4 is saved, playback can be done using QMediaPlayer as explained here. That looks darn simple. But I am struggling to figure how get my OpenGL textures saved into a .mp4 when I need them to.
So, How do I save a .mp4 video out of the OpenGL textures that are displayed on a QML item?
Pointing out to any basic example that exists would also help.
I don't think Qt will do you any favors when it comes to content creation, Qt's multimedia facilities are purely for content consumption purposes. You can play MM, not make MM.
You will have you explicitly use one of the many available MM libraries out there - vlc, ffmpeg, gstreamer, libav to name a few.