Always makes sure that you determine a video’s dimensions before playback. If the video is in 4k or higher than 1980×1080 your computer’s hardware will more than likely not have the acceleration to play the video without frame skipping. You can add the flag
-vf scale=1920x1080 when using FFmpeg to fix this.
The 4K video playback with VLC has strict requirements on the computer’s processor and graphics chip. Sometimes, even if your computer meets the requirements, you may find that 4K video plays back choppy. This is due to the immense processing power required to play 4K.PavTube.com
When converting your file to .ogv make sure that you use the correct video format settings.
If you omit -qscale:v (or the alias -q:v) then ffmpeg will use the default -b:v 200k which will most likely provide a poor quality output, and libtheora may drop/skip frames if the bitrate is too low.FFMPEG