Right now, the GIF is well generated (with the palette) in memory using FFMPEG C API, the only problem is that the GIF is way too fast and not at the right framerate. So I get a bit confused with all the place where we have to set the framerate. I would like to have a FPS=12, so should I define them as follow ? AVRational time_base = AVRational When getting the discovered codec from avformatallocoutputcontext (that examines the filename), we should set the pixel format to RGB24. Width, height, in_fmt, time_base.num, time_n, There’s not a lot to say technically because most of the code remained the same, except maybe a couple of things that have to do with the required formats that animated GIFs require (RGB24). pixfmt MP4 videos store pixels in different formats. 'video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d', 1 ffmpeg -i animated.gif -movflags faststart -pixfmt yuv420p -vf 'scaletrunc (iw/2)2:trunc (ih/2)2' video.mp4 movflags This option optimizes the structure of the MP4 file so the browser can load it as quickly as possible.

Into the init_filters(.) method, I don't understand the time_base and pixel_aspect variables of the argument structure: snprintf(args, sizeof(args), This work pretty well, but I have issue with the GIF framerate. I started from this topic and I just replaced the video decoder part with a conversion of my image in memory to an AVFrame. I have an image processing pipeline, and I have images in memory that I convert into AVFrame and I try to create a GIF with those.

Ffmpeg gif pixelated