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.
Ogg is a relatively young format of modern audio formats, which is consistently among the three most popular and competes worthy with MP3. This format (full name Ogg Audio File) appeared in 2002, was developed by the nonprofit organization Xiph.Org Foundation, is free and free. Ogg files are very convenient for storing data, because they have a high degree of compression. For users, Ogg is attractive precisely for this, as well as high quality sound. It is also attractive because it is an effective alternative to paid audio formats. You can listen to these files in Winamp, AIMP, VLC, XMMS software players.