F4V is a well-known flash video format developed by Adobe System. It is supported by Adobe Flash Player. Currently, approximately 80% of online videos are transmitted using Adobe Flash technology. Files with the F4V extension are called a container format. The F4V format, in comparison with other files of the FLV category, uses boxes to store information. In addition to devices with an operating system from Apple, these files can play almost all browsers that support flash video playback. F4V files resemble .FLV files, but use “blocks” to store data. Examples of blocks that are supported by the F4V format include meta block (metadata), moov block (file header), ftyp block (requested player tools), uda block (user data in free form), etc. The format container, in the development of which the ISO Media File Format was used, initially used the Quick Time Container Format from Apple. Compared to the old FLV format, the F4V format is fully compatible with the h.264 and ACC formats. This provides an opportunity to use other container formats.
QCP is an audio file category format. It has the full name Qualcomm PureVoice Audio File, since the format was developed by Qualcomm. The main application is the preservation of various types of recorded sound. The development of this format was in the company specifically for recording, storage and playback of all frequencies of the human voice. Files with the .QCP extension are most often used specifically for recording human voices, as well as for processing pauses that are natural for human speech. QCP files are also widely used for recording ringtones for mobile phones. They are very often applied as a sound attachment to emails. The standard plugin for many email programs is the PureVoice Player-Recorder program, which allows you to listen to the email application as a file with the .QCP extension. Also on any device, you can install the PureVoice SDK plugin, which allows you to listen to sound files with the extension .QCP. QCP belongs to the category of container formats. He can not independently set the encoding parameters of sound files. Inside the file with the extension .QCP there are files that use the EVRC or QCELP method for encoding.