Systems, devices, apparatuses, components, methods, and techniques for media content playback during travel are provided. An example method a method of generating a playlist trailer for a media playback device, the method comprising: identifying a plurality of media content items from a playlist for inclusion in a playlist trailer identifying snippets from the identified plurality of media content items; and combining the identified snippets to generate a playlist trailer.

Systems, device and techniques are disclosed for receiving a request from a user to add a media item to a playlist at a certain playlist position where the media items in the playlist are provided to other users in a media group. Based on a determination that the requesting user has rights to the requested media item, the requested media item may be added to the playlist at the position. When the playlist reaches the position, the user that added the media item to the playlist may be provided with a first version of the media item and the other users in the group may be provided with a second version of the media item. If the user that requested the item to be added to the playlist is determined not to have rights to the media item, the item is added to a position different than the requested position.

Methods and systems for publishing a playlist are disclosed. A user generates or selects a playlist, which is then provided (e.g., uploaded) for publishing. A playlist identifying at least one of one or more tracks and one or more albums is received. The playlist may then be published such that the playlist is viewable by one or more individuals. A user may then purchase one or more tracks/albums identified in the playlist via an online store.

A system and method for generating dynamic playlists utilizing device co-presence proximity. In accordance with an embodiment, the method can include identifying music preferences by analyzing the listening history on a device of a user; and recognizing what devices are co-present within a set proximity for the purposes of matching such devices. In accordance with an embodiment, the system can be determine what music each individual in a group has been listening to historically, and determine when those individuals are within a certain proximity to one another, including for example analyzing the media content played on a smartphone and recognising when two smartphones are in a same location.

Embodiments are provided for receiving media content based on the user media preferences. An example implementation includes a one or more servers receiving data representing a guest list for an upcoming event corresponding to a first user account, the guest list indicating multiple guests corresponding to respective second user accounts of a second cloud service and querying one or more streaming media services for music preferences corresponding to the multiple guests. The one or more servers receive, from the one or more streaming media services, data representing respective music preferences corresponding to the multiple guests and generate a playlist of audio tracks based on the received respective music preferences corresponding to the multiple guests. During the event, the server(s) cause the playlist to be queued in a playback queue for playback by one or more playback devices of a particular media playback system registered with the first user account.

A server receives a request to play a selected playlist from a first electronic device associated with a host listener. The playlist includes audio items having a common attribute. The server also receives an identity of a guest listener having a second electronic device and retrieves an indication of taste of the guest listener based on the received identity. The server selects an additional audio item based at least in part on the indication of taste of the guest listener and the common attribute of the audio items of the selected playlist, and incorporates the additional audio item into the selected playlist.

A non-transitory computer-readable medium includes computer-executable instructions that, when executed by at least one processor, may cause the at least one processor to retrieve a first training profile of a plurality of training profiles from a database, identify a plurality of index keywords in a respective training content of the first training profile, in which the respective training content includes audio data, video data, or both, and divide the first training profile into a plurality of sections based on the plurality of index keywords. Each of the plurality of sections is selectable for playback.

Embodiments described herein provide for extending media playback. In an example implementation, during playback of one or more first media items populated in a queue, a control system extends playback time of the queue. Extending playback time of the queue may involve determining when the one or more first media items will be finished playing; and before the first media items are finished playing, determining one or more second media items that correspond in substantial likeness to the one or more first media items and sending an instruction that causes the first playback device to insert the determined one or more second media items into the queue such that play time of the queue is extended.

Embodiments of system and method for performing object-modifying commands in an unstructured storage service are described. Embodiments may include utilizing one or more nodes to implement an unstructured storage service including a service interface configured to service data storage requests and data retrieval requests from remote clients. The unstructured storage service is configured to isolate access to each of multiple storage domains of the service to different clients. Embodiments may also include receiving from a given remote client, a request to store a data object to a given storage domain of the service. The request further specifying a command to modify source data for the object prior to storing the object. Embodiments may also include using the unstructured storage service to perform the command without exporting the source data from the unstructured storage service to the given remote client prior to completion of the command.

Techniques for secure fast channel change in live content streaming are described. In some embodiments, during content preparation, a packager and/or an encoder encrypts media content items at both the service level (e.g., by encrypting a first portion of the plurality of segments with a service level access key unique to a service) and the channel level (e.g., by encrypting a second portion of the plurality of segments with a channel level access key unique to a channel associated with the service). On the receiving end, a client device (e.g., a media player) requests a service level access key prior to content acquisition. As such, a client can join any channel on a segment protected with the service level key without waiting for a license for that channel first, and the channel license can be acquired in parallel with the content acquisition during channel switching.