I will convert video to GIF by frame.
So I can help you about defining the interval you want of any video.
You can use AVSPmod for that.
But first you have to install AviSynth; otherwise you can't run AVSPmod.
Download AviSynth and AVSPmod
https://www.mediafire.com/file/kdei727kd9lq6ga/Avisynth_and_AvsPmod.rar/file
Drag and drop your video file into AVSPmod then press F5 for preview.
By the way, you will see a code line like this;
AVISource("C:\Users\You\Videos\Sample.avi") for avi file format
If you can't preview your video file, write DirectShowSource, FFMpegSource2, MPEG2Source... instead of AVISource command.
Such as;
FFMpegSource2("C:\Users\You\Videos\Sample.avi")
But you have to download ffms-2.17. Then put both FFMS2.avsi and ffms2.dll filters in ffms-2.17 file inside "C:\Program Files\AviSynth 2.5\plugins" folder for 32bit, "C:\Program Files (x86)\AviSynth 2.5\plugins" folder for 64bit to use the FFMpegSource2 command.
Download ffms-2.17
https://www.mediafire.com/file/n7ehk2i8iv3q5km/ffms-2.17.7z/file
AVSPmod can display both frame number and time. Tell me the first and the last frame number of the interval you want on the video to get better result from me.
