Regarding "near lossless," the best option I've seen is using x264 with
"-crf 18 -preset ultrafast", which is basically a very high quality copy of
the video with a high bitrate due to the "ultrafast" preset.  There's
minimal loss of fidelity, but it's also still relatively quick to do the
encode because x264 is exceptionally performant.

I use this extensively in a video processing pipeline I wrote (2
million-ish videos a month, at the moment).  It's a total lifesaver,
because processing video in a lossless way requires such a huge amount of
storage/memory that it's almost not worth consideration for anything but
digital mastering of original content. A better approach in probably ~95%
of situations is a "near lossless" approach.

On Thu, Jun 13, 2019 at 4:28 PM Eric Shepherd (Sheppy) <
esheph...@mozilla.com> wrote:

> Yeah, I know that lossless is huge, but was curious if there were any
> options since it will be a question that gets asked, and therefore I want
> to be prepared. My experiements suggest that even where there are codecs
> that have a lossless or near-lossless feature in the spec, they tend not to
> be implemented, especially in browsers. So I guess that’ll be a big “nope”
> for now… unless someone has further guidance.
>
>
> On June 13, 2019 at 6:23:00 PM, Martin Thomson (m...@mozilla.com) wrote:
>
> Lossless video coding isn't really a thing on the internet.  There are
> lossless modes in some encoders (x264 has one that I'm aware of), but they
> tend to inflate inputs rather than compress them.  There are systems used
> in video production that maintain all the source bits, but they use insane
> amounts of bandwidth.
>
>
> Eric Shepherd
> Senior Technical Writer
> MDN Web Docs <https://developer.mozilla.org/>
> Blog: https://www.bitstampede.com/
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> dev-media@lists.mozilla.org
> https://lists.mozilla.org/listinfo/dev-media
>
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