Attempting to re-create / replicate an archive made years ago with an unknown application, which is no longer complete on a file-sharing network

• precomp-cpp

  14 390 0.0 C

  Precomp, C++ version - further compress already compressed files

https://github.com/schnaader/precomp-cpp Maybe some tools posted in https://encode.su/threads/1399-reflate-a-new-universal-deflate-recompressor Maybe something has to be developed specifically for your task.

• XADMaster

  2 98 5.3 C

  Objective-C library for archive and file unarchiving and extraction

  

Rar would compress them with plain LZ, there's nothing special for jpegs there. However Winzip has a special codec for jpegs - that could be a problem. https://github.com/MacPaw/XADMaster/tree/master/WinZipJPEG

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• xdelta

  4 1,036 10.0 C++

  open-source binary diff, delta/differential compression tools, VCDIFF/RFC 3284 delta compression

• HDiffPatch

  5 1,379 8.3 C++

  a C\C++ library and command-line tools for Diff & Patch between binary files or directories(folder); cross-platform; runs fast; create small delta/differential; support large files and limit memory requires when diff & patch.

I'd suggest to just try other diff programs, eg. https://github.com/sisong/HDiffPatch

Suggest a related project