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The first one might re-encode, the second one explicitly doesn't, the streams are just copied as is.
by pvg 6y ago
The first one might re-encode, the second one explicitly doesn't, the streams are just copied as is.
- _Gyan_ 6y agoThe first one will re-encode.
- pvg 6y agoRight but it's conceivable the default behaviour might change, the explicit one is quite unlikely to.
- _Gyan_ 6y agoIt hasn't, since ffmpeg's inception. It's very unlikely - it would require that ffmpeg verify codec compatibility with the output muxer. Not all muxers have registered a codec tags list , so that can't happen.