Abstract: The present disclosure relates to multimedia data playing methods and terminal devices. One example method includes obtaining, by a terminal device, a first sound effect plug-in, where the first sound effect plug-in corresponds to a first sound effect, and the terminal device includes a first application and a second application that are used to play multimedia data, receiving, by the terminal device, a first instruction used to indicate that a user of the terminal device selects the first sound effect option, wherein where the first sound effect option is an option corresponding to the first sound effect, when first multimedia data is to be played by the first application or the second application, processing, by the terminal device, the first multimedia data by using the first sound effect plug-in according to the first instruction to play the first multimedia data with the first sound effect.

Abstract: A method can measure the size of an object using a terminal having two cameras. The method includes obtaining, by a terminal using a first camera, a first image that includes a to-be-measured object, and obtaining, using a second camera, a second image that includes the to-be-measured object, where the first camera and the second camera are disposed in a same plane. The method also includes comparing locations of the to-be-measured object in the first image and in the second image, so as to obtain a total location offset of the to-be-measured object. Additionally, the method includes receiving a measurement point selection instruction entered by a user based on the first image, and calculating a distance between selected measurement points according to the total location offset, a distance between a center of the first camera and a center of the second camera, and a focal length of the first camera.

Abstract: Embodiments of the present invention relate to a multimedia data playing method and a terminal device. The method includes: obtaining, by a terminal device, a first sound effect plug-in, where the first sound effect plug-in corresponds to a first sound effect, and the terminal device includes a first application and a second application that are used to play multimedia data; receiving, by the terminal device, a first instruction used to indicate that the user selects the first sound effect option; wherein the first sound effect option is an option corresponding to the first sound effect; when first multimedia data is to be played by the first application or the second application, processing, by the terminal device, the first multimedia data by using the first sound effect plug-in according to the first instruction, to play the first multimedia data with the first sound effect.

Abstract: A method can measure the size of an object using a terminal having two cameras. The method includes obtaining, by a terminal using a first camera, a first image that includes a to-be-measured object, and obtaining, using a second camera, a second image that includes the to-be-measured object, where the first camera and the second camera are disposed in a same plane. The method also includes comparing locations of the to-be-measured object in the first image and in the second image, so as to obtain a total location offset of the to-be-measured object. Additionally, the method includes receiving a measurement point selection instruction entered by a user based on the first image, and calculating a distance between selected measurement points according to the total location offset, a distance between a center of the first camera and a center of the second camera, and a focal length of the first camera.