What is the audio-visual evidence in criminal proceedings? How to distinguish

Audio-visual evidence in criminal proceedings includes: audio recordings, video recordings, computer storage materials and information materials obtained using specialized technical equipment. It is different from physical evidence, documentary evidence, and computer evidence. Physical evidence refers to all items and traces that can prove the true circumstances of the case. Such as tools used in crimes, fingerprints, footprints, blood stains of criminal suspects, etc., which prove the facts of the case based on their existence, shape, quality, specifications and characteristics. Audio-visual materials use sounds, images, information, and stored materials to prove the facts of the case, and it is their content that plays the role of proof. Therefore, audio-visual materials do not belong to the category of physical evidence, but are a type of evidence independent of physical evidence. Documentary evidence is a written document that proves the facts of a case based on the content and meaning recorded in words, symbols, pictures, etc. Audio-visual materials do not use words and symbols to express ideological content, but use language, sound, images, and stored data to prove the facts of the case. They have the special performance of "visible, heard, and documented." In terms of its form of expression and proving function, it is incomparable to documentary evidence. It can be seen that audio-visual materials do not fall into the category of documentary evidence. Computer evidence (a term for a form of evidence) refers to electromagnetic records that are produced during the operation of a computer or computer system and whose recorded content proves the facts of a case. It is a tool used to prove the facts of a case through computer-stored data and information. Although there are similarities between the two, that is, it is not the technological equipment (tape, video tape, electronic computer, etc.) itself that plays the role of proof, but its content, that is, sound, image, stored data and information. However, there are still differences between the two. From the perspective of communication media, audio-visual materials can be expressed through single media (such as recorded sound evidence, photos taken), or through composite media forms (pictures taken by cameras, images), and can also be expressed through a combination of single media and multiple composite media (such as computer-stored information, text, data, information, images and information provided by other technological equipment), and the scope of computer evidence dissemination media needs to be Smaller than audio-visual materials, the communication media is only a part of the audio-visual materials. From this point of view, the audio-visual materials are not computer evidence.