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- Nov 16, 2019
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Does YouTube ever keep the master audio of videos for re-encoding? I ask since I've found very old, pre-2010 videos that have opus audio encodes. Are these re-encodes of the original master file, or just encodes of old vorbis/aac audio? I'm curious since it seems only a select few old videos have opus encodes, not all- and all videos that do either belong to channels that are prominent/influential in some way or were once viral.
Further, subjectively, they don't sound like 128kbs opus encodes of similar bitrate aac/vorbis audio. I'd like to analyze graphs of the output of my own opus encode of old vorbis/aac audio from YouTube vids compared to a graphs of opus audio ripped straight from YouTube at some point to see if I can find objective differences in quality.
Further, subjectively, they don't sound like 128kbs opus encodes of similar bitrate aac/vorbis audio. I'd like to analyze graphs of the output of my own opus encode of old vorbis/aac audio from YouTube vids compared to a graphs of opus audio ripped straight from YouTube at some point to see if I can find objective differences in quality.
