Can framebuffer create a buffer for adding queses of images for fast rendering?

See more:

OpenGL

ffmpeg

C++14

Hi,

I am working on the OpenGL Application. which can open and read multiple video file frames. so, in output is can play three different videos at the same time without async frames rendering. what are odds get the sync frames rendering? After reading all the frames, define a buffer for multiple video frames or alternative could be the FFmpeg filter function? I have some doubts that it can add a buffer for every video frame that is in the queue. I know framebuffer is used for visual effects. can it be possible to use for texture(images or frames of videos) so it can update texture very quickly rather than going to another function to get pixels values?

I am stuck at this level.

What I have tried:

I tried a couple of things such FFmpeg terminal way
1.

for example, 
<pre>ffmpeg -i "Background - Australia - Left.mov" -i "Background - Wales - Right.mov" -i "Rising Sun.mov" -i "Shield - Australia.mov" -i "Shield - Wales.mov" -filter_complex '[0:v][1:v]overlay=x=0:y=0[a],[a][2:v]overlay=x=0:y=0[b],[3:v]scale=-1:800[c],[4:v]scale=-1:800[d],[b][c]overlay=x=0:y=0[e],[e][d]overlay=x=W-w:y=0[f]' -map '[f]' output_complex.mov

2.
Framebuffer could be possible( i am not sure)
3.
trying use ffmpeg filter cmd in code. but lack of advice.