Editing Media Transfer Protocol (section)

===The spec knows a fixed set of defined file formats===
The MTP specification includes an [[enumeration]] of file formats, called ''object format''.<ref name="spec1.1"/> The use of this enumeration is in communicating supported file formats, and formats of transferred files.
Apart from some uncategorized formats in the beginning, the list of formats is grouped in categories of image, audio, video and document formats, with each category having one "Undefined" format followed by specific formats. There is also a super-generic "Undefined object" format.

[[Jolla]] cited lack of [[WebM]] support in MTP as one reason not to support the video format in their mobile operating system [[Sailfish OS]]. It is unclear if the limitation is in the tools or the spec, other than that WebM is not defined by the MTP 1.1 spec.<ref>{{cite web|url=https://together.jolla.com/question/43221/webm-vp8-vp9-opus-support-for-sailfish/|title=Webm (VP8, VP9, Opus) support for Sailfish - together.jolla.com|access-date=June 1, 2016|archive-date=March 4, 2016|archive-url=https://web.archive.org/web/20160304052200/https://together.jolla.com/question/43221/webm-vp8-vp9-opus-support-for-sailfish/|url-status=live}}</ref>{{Unreliable source?|reason=User-generated content|date=June 2017}}<ref>{{cite web|url=https://forum.sailfishos.org/t/unable-to-use-mtp-using-usb-cable/5874|title=Unable to use MTP using USB cable |website=Sailfishos.org|date=April 13, 2021 |access-date=April 13, 2021}}</ref>