Why your MP3 sounds different after converting from MP4
The audio inside an MP4 is usually AAC. Turning it into MP3 decodes it and encodes it again, and that second pass is where the quality goes.
Vashist Nagori··4 min read
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Notes on file formats, conversion, and the tools we build.
5 articles
The audio inside an MP4 is usually AAC. Turning it into MP3 decodes it and encodes it again, and that second pass is where the quality goes.
Vashist Nagori··4 min read
We built it to preview conversion results without downloading them. It turned into the fastest way to look at an XML file on a phone.
Vashist Nagori··3 min read
Most oversized PDFs are one problem wearing a disguise: photographs saved at print resolution inside a document nobody will print.
Vashist Nagori··5 min read
WebP wins on file size almost every time. That is not the whole question, and for some images PNG is still the right answer.
Vashist Nagori··4 min read
Your camera recorded AVCHD. The video inside is ordinary H.264, which is why the fix is usually a container change and not a real conversion.
Vashist Nagori··4 min read