You're speculating quite a bit about what the codecs support. See https://news.ycombinator.com/item?id=40844633 https://news.ycombinator.com/item?id=40844633.

You're speculating quite a bit about what the codecs support. See https://news.ycombinator.com/item?id=40844633 https://news.ycombinator.com/item?id=40844633. Some container formats support metadata so you can cut without reencoding.