balrogg: lossless Vorbis/Opus recompressor

[kj911]

v1.2: Don't like CMD window forced closing, after execute "balrogg.exe" printing helps or (de)compress.

[FitGirl]

Thanks for a new tool. I've tested it a little. My Opus tests, while showing some result don't make it usable in real repacking - the gain is tiny, no solid mode support (yet?).

Test corpus: Wwise Opus converted to generic opus: 14440 files
Opus: 581718877 bytes
Ballroggs: 567165459 bytes

Since opus files don't have codebooks which could be stored once in a solid mode and where oggre does it's job good, with opus it won't work. And rn since ballrogg doesn't support solid mode, one can't expect big gain on a smaller files concatenated into one stream.

I also tested initial ballrogg v1.0 on vorbis files in single/solid mode. It compressed files fine in single mode, but with the same files concatenated it gave an error.

Will do more tests with fresh builds when I have time.
Unfortunately for repackers, Opus is already a very effective format, with it's range-coder near Shannon limit and space for improvement is really tiny.

[kj911]

FitGirl: Wow! Those OPUS files are so compact! 2.5% size reduction is really not much.
For you, what would be the "sweet pot", in Kaktor's words, where you would use it, for a Repack? 5% or 10% or more?

Doesn't SREP or "lzp:8mb:3:h22:d64mb" give minimal results either? (min. 1-2KB.)

_contextmodel: Do you have a rough idea of ​​what the realistic gain would be if there were a public recompressor for WMV/WMA or MPEG-1/2 videos? (For MPEG2, there is a packer called "oca_mpeg06", but it is too slow.) Can the 2-5-10 or upto MB/s speed be achieved for these cases, as with BinkPack? You don't include H264 in the target list?

[FitGirl]

Originally Posted by kj911

FitGirl: Wow! Those OPUS files are so compact! 2.5% size reduction is really not much.
For you, what would be the "sweet pot", in Kaktor's words, where you would use it, for a Repack? 5% or 10% or more?

Around 10% with a reasonable MT-speed would be nice. But I doubt it's achievable with Opus. It's REALLY very good lossy format.

As for using it instead of oggre in repacks, will wait until the format matures and gets a stable version. Since the developer is interested in that project, it looks like just a matter of time.