Compress mp4 using FFMPEG

ffmpeg-compress-mp4

$ ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 output.mp4

Commands using Linux with ffmpeg to shrinking big MP4 video file to smaller sizes

• ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 out.mp4
• • 3.6 Gb to 556 Mb, great quality 🥇
• ffmpeg -i input.mp4 -s 1280x720 -acodec copy -y output.mp4
• • 3.6 Gb to 62 Mb, quality "good enough"/acceptable 👍
• ffmpeg -i input.mp4 -vcodec h264 -b:v 1000k -acodec mp3 output.mp4
• • 3.6 Gb to 30 Mb, very shitty quality 💩

good enough worked fine for me..To my "average human" eye, i coudlnt find any real difference with the original video compared side by side (original: 1gb to good enough: 296mb)

Edit: if you wanna go lower try changinng -b:v value e.g.: ffmpeg -i input.mp4 -vcodec h264 -b:v 700k -acodec mp3 output.mp4 and if you don't want sound try: ffmpeg -i input.mp4 -vcodec h264 -b:v 700k -an output.mp4

My experiment:

• ffmpeg -i input.mp4 -vcodec h264 -b:v 1000k -an output.mp4
  32MB to 3.6MB
• ffmpeg -i input.mp4 -vcodec h264 -b:v 200k -an output.mp4
  32MB to 742KB

thanks, it works.
using || -b:v 1000K || ---- from 2MB to 1MB mp4 file

./ffmpeg -i input.mp4 -c:v libx265 -preset ultrafast -crf 28 -c:a aac -b:a 250k output.mp4

This is better for h265, it's fast and should reduce the file size by 50-70% if you want better video, change the ultrafast to fast or change the -crf to a lower number like 24

If you want to change from 4K to 1080P, add -s 1920x1080 after the -i input.mp4

./ffmpeg -i input.mp4 -c:v libx265 -preset ultrafast -crf 28 -c:a aac -b:a 250k output.mp4

This is better for h265, it's fast and should reduce the file size by 50-70% if you want better video, change the ultrafast to fast or change the -crf to a lower number like 24

If you want to change from 4K to 1080P, add -s 1920x1080 after the -i input.mp4

This worked pretty well for me -- converted a 323 MB Zoom recording to a 81 MB file. without reducing resolution, is there anything more one can do to further shave off the file size?

Commands using Linux with ffmpeg to shrinking big MP4 video file to smaller sizes

• ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 out.mp4
• • 3.6 Gb to 556 Mb, great quality 🥇
• ffmpeg -i input.mp4 -s 1280x720 -acodec copy -y output.mp4
• • 3.6 Gb to 62 Mb, quality "good enough"/acceptable 👍
• ffmpeg -i input.mp4 -vcodec h264 -b:v 1000k -acodec mp3 output.mp4
• • 3.6 Gb to 30 Mb, very shitty quality 💩

Thanks for sharing, really helpful!