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Why are camera taken videos at the same resolution way bigger than ones ripped from youtube? (lemmy.zip)

submitted 8 months ago by sarmale@lemmy.zip to c/technology@beehaw.org

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A 4 min 1080p30fps video taken with my phone camera is 518MB, While a 12 min 1080p30fps video ripped from youtube is 341MB, both are using mp4 h.264 as codec and the youtube one isnt of lower quality, so why this big difference?

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[–] BCsven@lemmy.ca 1 points 8 months ago

Resolution and quality are different things, especially when different codecs are used for data compression. An AVI i record for acreen capture might hit 250 MB, running that through ffmpeg to get an mp4 might be 20MB, if i drop the quality but same resolution then sometimes 7MB