How to reduce the file size of a video | Compress, convert & resize video compression tricks
Today, we show how to easily reduce the size of a video file without losing quality. We will demonstrate several tricks that ensure a higher compression rate for your videos and films. All techniques can be combines and parameters customized to achieve the result you need. Enjoy!
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EXAMPLE
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❶ Reducing the file size by converting the video to the newest MP4 (H.265 codec)
→ ffmpeg -i input.mp4 -vcodec libx265 output01.mp4
with:
ffmpeg = Calls Ffmpeg, a free video / audio handling software to …
-i input.mp4 = … read file «input.mp4» and …
-vcodec libx265 = … converts the file to .mp4 using the newer H.265 codec… note: In comparison to most common H.264 (AVC) MP4 codec, the H.265 (HEVC) MP4 codec offers from 25% to 50% better data compression at the same level of video quality.
output01.mp4 = … and outputs the result to file «output01.mp4»
The result: In this example, the overall video file size is reduced from 7.29MB to 3.06MB
❷ Reducing the file size by changing the video Constant Rate Factor (CRF)
→ ffmpeg -i input.mp4 -crf 24 output02.mp4
with:
-i input.mp4 = Reads file «input.mp4» and …
-crf 24 = … sets the Constant Rate Factor (CRF) to 24… Note: With H.264/H.265, CRF can be set between 0 and 51 with default CRF values resp. 23/28. The lower the value, the better the quality.
output02.mp4 = … and outputs the result to file «output02.mp4»
The result: In this example, the overall video file size is reduced from 7.29MB to 6.05MB
❸ Reducing the file size by changing the video dimensions (height and width)
→ ffmpeg -i input.mp4 -vf scale=640:360 output03.mp4
with:
-i input.mp4 = Reads file «input.mp4» and …
-vf scale=640:360 = … calls the scale video filter (vf) to change the video size to 640x360…
output03.mp4 = … and outputs the result to file «output03.mp4»
The result: In this example, the overall video file size is reduced from 7.29MB to 2.47MB
❹ BONUS: Putting it all together
→ ffmpeg -i input.mp4 -vcodec libx265 -crf 24 -vf scale=640:360 output04.mp4
The result: In this final example, the overall video file size is reduced from 7.29MB to 1.85MB
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→ Catch up with the FFMPEG guy Channel
• ALL THE VIDEOS FROM THE CHANNEL
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MUSIC
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→ Sky Scraper - Geographer
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An FFMPEG question?
Ask the FFMPEG guy
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