> http://opus-codec.org/release/stable/2017/06/26/libopus-1_2_1.html
This Opus 1.2.1 minor release fixes a relatively rare issue where the 1.2 encoder would wrongly assume a signal to be bandlimited to 12 kHz and not encode frequencies between 12 and 20 kHz.
This only happens on a few clips, but it is good to update to avoid a potential loss of quality.
There are no other changes compared to 1.2.
> http://opus-codec.org/release/stable/2017/06/20/libopus-1_2.html
Changes since 1.1.x include:
- Speech quality improvements especially in the 12-20 kbit/s range
- Improved VBR encoding for hybrid mode
- More aggressive use of wider speech bandwidth, including fullband speech starting at 14 kbit/s
- Music quality improvements in the 32-48 kb/s range
- Generic and SSE CELT optimizations
- Support for directly encoding packets up to 120 ms
- DTX support for CELT mode
- SILK CBR improvements
- Support for all of the fixes in draft-ietf-codec-opus-update-06 (the mono downmix and the folding fixes need --enable-update-draft)
- Many bug fixes, including integer wrap-arounds discovered through fuzzing (no security implications)
The reason I'm not making this the default is because it seems to add
complexity and degrades performance of the library. For details have a
look at this lengthy discussion at:
https://bugs.debian.org/686777
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
