Always reencode videos and allow to choose quality preset

[benoit74]

The scraper always re-encode with the low quality preset if the --low-quality setting is used or if the requested video format is not the same as the one used by TED.

I would have expected the scraper to reuse TED video if format is same, and re-encode with high or low preset depending on the --low-quality preset (so that we can re-encode in "high-quality").

Is this intentional?

[rgaudin]

I think the question is malformed but I'll rephrase was we intended:

• always re-encode
• re-encode either with strong compression is --low-quality, or with lighter settings otherwise

The main reason is to harmonize the quality of videos within a ZIM file. It's possible that the collections of videos to include are widely different in terms of quality/filesize/dimensions. re-encoding would help.

We can revisit (this choice dates back a few years) or we can extend the options to allow bundling source video.

[benoit74]

Then the scraper is not working as intended (and I like what was intended).