Compress mp4 using FFMPEG

ffmpeg-compress-mp4

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

None of these have done anything, but give me a 30-35% INCREASE in size. I'm still determined to find a solution but attempts to compress this video by ANY means results in similar results.....

@AD5GB as i said before here, it depends on what video you have, so you need to experiment a bit

Very good! Using it, reduced 86mb to 64mb. thank you all. I also summarized some other methods, I hope it can help everyone https://vidon.me/compress-mp4

Nice! It works! Thanks for sharing you. Also, use this DVD to MP4 Converter to compress your DVD contents.

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Thanks for sharing! I've used a programm before and the compressed videos always got pixelated, blurry, or blocky. This one works just fine. I've also found an article introducing people how to convert blu ray to MP4. It might be useful for anyone in need.

Nice work! Also, check out KeepVid for more amazing video-related tools.

Maybe these 2 articles can help you:
https://dvdfab.at/drm-m3u8-downloader/m3u8-to-mp4.htm
https://streamfab.de/mp4-downloader