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For video, level 1 should result in decent results on most clips. For less banding, level 2 can make a big difference. This is still an active area of development, and quality/encoding perf. will improve over time.
-[ETC1S Compression Effort Levels](https://github.com/BinomialLLC/basis_universal/wiki/ETC1S-Compression-Effort-Levels)
+To control the ETC1S encoder's quality vs. encoding speed tradeoff, see [ETC1S Compression Effort Levels](https://github.com/BinomialLLC/basis_universal/wiki/ETC1S-Compression-Effort-Levels).
### More detailed examples
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-### .basis baseline file format forwards and backwards compatibility
-
-Short form: Old transcoders will always be able to read baseline compressed texture data written by new encoders. And new transcoders will always still be able to read old .basis files generated by old encoders.
-
-We have no intentions of changing the baseline file format (i.e. the file format written by this encoder), apart from critical bug fixes. We will be extending the format in the future to add features to the system, but old transcoders will still be able to transcode baseline texture data from .basis files written using new transcoders. .basis files are intended for very wide distribution of compressed texture data, like .jpeg or .png, so backwards and forwards compatibility is critical.
-
-So if you compile and ship the transcoder into an application today, we are making a guarantee to you that this transcoder will stay relevant/usable even as we enhance the system. To do this, the file format has the ability to be extended.
-
-Note: The one exception to this promise are .basis textures marked as video. We will be changing how a key symbol is interpreted to introduce skip blocks (conditional replenishment) into the system.
-
### Encoder speed
Total time for basisu.exe to compress a 1024x1024 ETC1S texture on a 7 year old 4-core 2.2GHz Core i7 laptop - timings are "without mipmaps/with mipmaps":
