Transmission 4.1.0-beta.4

This is Transmission 4.1.0-beta.4. We're not in feature freeze yet, so this release includes some new features as well as bugfixes and performance improvements.

What's New in 4.1.0-beta.4

Highlights

• Unify RPC and settings.json strings to snake_case, backwards compatible. (#7108)
• New JSON-RPC 2.0-compliant RPC API. (#7269)
• Use native icons for menus and toolbars: SF Symbols on macOS, Segoe Fluent on Windows 11, Segoe MDL2 on Windows 10, and XDG standard icon names everywhere else. (#7819, Qt Client)

All Platforms

• Added an option to verify a torrent immediately after it finishes downloading. (#4178)
• Added BEP-21 downloader count to tr_tracker_view and RPC. (#6936)
• Added peer traffic statistics to torrent-get rpc method. (#7172)
• Added bytesCompleted field to torrent-get rpc call. (#7173)
• Deprecate tcp-enabled and udp-enabled in favour of preferred_transports. (#7473)
• Added raw PeerID to RPC interface. (#7514)
• IPv4 patterns in the RPC whitelist can now match with IPv4-mapped IPv6 addresses. (#7523)
• Improved libtransmission code to use less CPU. (#7800)
• Support dual stack by manually creating and binding socket on Windows platform. (#6548)
• Generate imported targets for MbedTLS. (#7631)
• Added support for libevent 2.2.1-alpha-dev. (#7765)
• Bumped miniupnpc from 2.2.8 to 2.3.3. (#7783)
• Bumped {fmt} to 12.1.0. (#7793)

macOS Client

• Fixed missing tooltips for Group rows in Torrent Table View. (#7828)

Qt Client

• Added the ability to use a custom URL path when connecting to remote Transmission servers. (#7561)

Web Client

• Implemented a context menu for file list in web app making way to rename or copy name of individual file. (#7389)
• Updated turtle for web app. (#6940)
• Added checkbox to delete data while removing torrents. (#7000)
• Gave labels to the mainwin buttons for web client. (#6985)

transmission-remote

• Added support to download sequentially from a specific piece. This can enable apps to seek within media files for streaming use cases. (#7808, #7809)
• Fixed 4.1.0-beta.1 issue that displayed incorrect speeds when using transmission-remote -pi. (#7796)

Everything Else

• Apply Xcode 26.0 recommendations. (#7823)
• Updated documentation. (#7826, #7829, #7830, #7836, #7840)

Thank You!

Last but certainly not least, a big Thank You to these people who contributed to this release:

Contributions to All Platforms:

• @cdowen:
  • Added peer traffic statistics to torrent-get rpc method. (#7172)
  • Added bytesCompleted field to torrent-get rpc call. (#7173)
  • Added raw PeerID to RPC interface. (#7514)
• @G-Ray (Geoffrey Bonneville):
  • Feat: allow downloading sequentially from a specific piece. (#7502)
• @Ghost-chu (Ghost_chu):
  • Code review. (#7172)
• @github-advanced-security[bot]:
  • Code review. (#7514)
• @herbyuan:
  • Support dual stack by manually creating and binding socket on Windows platform. (#6548)
• @killemov:
  • Code review. (#7269)
• @nevack (Dzmitry Neviadomski):
  • Code review. (#4178, #7520, #7802, #7810)
• @reardonia (reardonia):
  • Code review. (#6936, #7520)
  • Upload_only fixes, check for partial seeds. (#7785)
• @tearfur (Yat Ho):
  • Code review. (#4178, #6548, #7172, #7173, #7502, #7514, #7743, #7785, #7797, #7799, #7800)
  • Added BEP-21 downloader count to tr_tracker_view and RPC. (#6936)
  • Unify RPC and settings.json strings to snake_case, backwards compatible. (#7108)
  • New JSON-RPC 2.0-compliant RPC API. (#7269)
  • Deprecate tcp-enabled and udp-enabled in favour of preferred_transports. (#7473)
  • Fix: caching a source address doesn't imply public internet connectivity. (#7520)
  • IPv4 patterns in the RPC whitelist can now match with IPv4-mapped IPv6 addresses. (#7523)
  • Fix: don't bind udp sockets if no OS support. (#7552)
  • Refactor: replace all evutil_make_listen_socket_ipv6only usages. (#7779)
  • Refactor: torrent complete verify cleanup. (#7802)
  • Refactor: overhaul tr_address special address checks. (#7818)
  • Refactor: store BT peers with std::shared_ptr. (#7837)
  • Perf: short circuit reset_blocks_bitfield(). (#7838)
• @winterheart (Azamat H. Hackimov):
  • Generate imported targets for MbedTLS. (#7631)

Contributions to macOS Client:

• @nevack (Dzmitry Neviadomski):
  • Code review. (#7762, #7763, #7787, #7792)
  • Macos: Convert FileOutlineView to View-based table. (#7760)
  • Try out xcbeautify and fix missing artifacts. (#7824)
  • Fixed missing tooltips for Group rows in Torrent Table View. (#7828)
  • Updated macos actions. (#7845)
• @sweetppro (SweetPPro):
  • Code review. (#7763, #7828)

Contributions to Qt Client:

• @htmltiger:
  • Added the ability to use a custom URL path when connecting to remote Transmission servers. (#7561)

Contributions to Web Client:

• @killemov:
  • Code review. (#7389)
• @nevack (Dzmitry Neviadomski):
  • Code review. (#7389)
• @Rukario:
  • Updated turtle for web app. (#6940)
  • Gave labels to the mainwin buttons for web client. (#6985)
  • Added checkbox to delete data while removing torrents. (#7000)
  • Implemented a context menu for file list in web app making way to rename or copy name of individual file. (#7389)
• @tearfur (Yat Ho):
  • Code review. (#7000)

Contributions to Daemon:

• @tearfur (Yat Ho):
  • Refactor: use new tr_variant API in daemon. (#7103)

Contributions to transmission-remote:

• @sanapci (Elek, David):
  • Fixed 4.1.0-beta.1 issue that displayed incorrect speeds when using transmission-remote -pi. (#7796)
• @tearfur (Yat Ho):
  • Added support to download sequentially from a specific piece. This can enable apps to seek within media files for streaming use cases. (#7808, #7809)

Contributions to Everything Else:

• @nevack (Dzmitry Neviadomski):
  • Apply Xcode 26.0 recommendations. (#7823)
  • Fixed unreachable in tr_make_listen_socket_ipv6only. (#7825)
  • Updated documentation. (#7826, #7829, #7830, #7840)
• @niol:
  • Search both fmt/base.h (fmt 11+) and fmt/core.h (fmt < 11) for FMT_VERSION. (#7772)
• @tearfur (Yat Ho):
  • Code review. (#7825)
  • Build: bump clang tools to 20. (#7573)
  • Fix: libb64 submodule branch. (#7855)
  • Ci: disable fail-fast for new macOS runners. (#7857)