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A comment on FFMPEG from Zero to Hero. Parent comment

Re:FFMPEG from Zero to Hero by fireattack on Saturday March 06, 2021 @10:59PM (#26373018)
Encoding settings metatag can be striped.

Regardless, I don't think these software are "matching" anything. TMPGEnc for example has settings to choose what quality you want for these re-encoded frames.

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Re:FFMPEG from Zero to Hero by _Gyan_ on Sunday March 07, 2021 @04:28AM (#26374465)
The parameters being matched would be those that maintain decoder config. Usually, bitrate/quantizer values don't come into that.
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Re:FFMPEG from Zero to Hero by fireattack on Sunday March 07, 2021 @05:30AM (#26374748)
Oh yeah, the level would (should) definitely be kept.
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