Release Notes: IBM Aspera Streaming for Video 3.8.0

Product Release: March 9, 2018
Release Notes Updated: March 8, 2018

This release of IBM Aspera Streaming for Video provides the following new features and fixes. In particular, the Breaking Changes section provides important information about modifications to the product that may require you to adjust your workflow, configuration, or usage. Additional sections cover system requirements and known problems.

Note: Some Aspera product names are in a transition phase. During the transition, Enterprise Server and Connect Server might also be referred to as "IBM Aspera High-Speed Transfer Server", Point-to-Point Client might also be referred to as "IBM Aspera High-Speed Transfer Endpoint", and IBM Aspera Shares and IBM Aspera Faspex might also be referred to as the bundled product "IBM Aspera High-Speed Sharing Server."


  • Multiple multicast streams can now concurrently transfer to the same multicast IP address (as long as the multicast port varies) or concurrently transfer to the same multicast port (as long as the multicast IP address varies). (CIM-770)
  • Streaming for Video can now use TCP and UDP providers as a source or destination I/O in command line.
  • A new parameter, pktbatch, can be used to control how UDP datagrams are read and written. By default,Streaming for Video now does a batch read and write of UDP datagrams. Disable the option to read and write one packet at a time.


If you are upgrading from a previous release, the following changes for this release may require you to adjust your workflow, configuration, or usage.

  • On Windows OS as of 3.7.4, updates to the Cygwin OpenSSH implementation that is used by High-Speed Transfer Server and Endpoint cause transfers to error when:
    • the OpenSSH service is run by an Active Directory domain user, and
    • the transfer user is a different Active Directory domain user who has a docroot on a CIFS or SMB share.
    In this case, the transfer user cannot use SSH key authentication for uploads or downloads because they do not get the proper credentials to access the mounted storage.
  • Performance enhancements to A4, the executable that Streaming for Video uses, required changes that make version 3.8.0 unable to transfer with versions 3.7.4 and earlier.Workaround: Upgrade your Streaming for Video senders and receivers to 3.8.0 to ensure compatibility.


ATT-448 - You cannot transfer multiple multicast streams concurrently if they use the same multicast IP or the same multicast port. (CIM-770)

ATT-289 - UDP streaming can handle only a fixed datagram size and loses packets if the packets do not match the datagram size.

ATT-288 - [macOS] The mcast parameter ifaddr does not work.

ATT-161 - During transfers from a multicast source to a multicast destination, ascp4 may exit with the error message Error: Empty file list from file/stdin [Peer aborted session] if the transfer user has a docroot set.


  • Windows 64-bit: Windows 7 with service pack 1, 8.1, 10, or Windows Server 2008 R2 with service pack 2, 2012 R2, 2016
  • Linux 64-bit: Ubuntu 14.04 LTS, 16.04 LTS, 17.10; RHEL 6-7; CentOS 6-7; SLES 11-12; Debian 7-9; Fedora 26-27; Kernel 2.4 or higher and Glibc 2.5+
  • Mac: OS X 10.11, macOS 10.12 (Sierra), 10.13 (High Sierra)


Linux 64-bit (deb): aspera-scp-p2p-fs-
md5: aca5184656ff4a2f556b218998151017
sha1: 12945ff7e68d2f525940eba605733a5ecc24c2cd


ATT-186 - A multicast session does not fail if the multicast IP address and port is already in use on the receiver.


For online support resources for Aspera products, including raising new support tickets, please visit the Aspera Support Portal. Note that you may have an existing account if you contacted the Aspera support team in the past. Before creating a new account, first try setting a password for the email that you use to interact with us. You may also call one of our regional support centers.

Powered by Zendesk