Convert FLV to AMR

.flv

FFDShow

This flash video format is defined by the Adobe systems and is commonly used for online videos. There are multiple users of the flash video format such as YouTube, Hulu, VEVO, Yahoo! and other services that you serf online on your iPhone, iPad, or laptop. One can access the flash video on various operating systems by enabling the Adobe Flash Player and web browser plugin or other third-party programs except for iOS.

FLV files use the H.263 standard under the Sorenson Spark (FourCCFLV1) codec, and there are various reasons for it, such as;

• These are the first codec files that are supported by Flash Player.
• The heavy usage throughout other versions being able to support this same codec.

The audio can be recorded over the video using a microphone and Nellymoser Asao codec. By using the bitmap tile and lossy compression while reducing color depth, the screen share is possible. But the primary difference is that the screen share done by the 2nd way is only compatible with Flash Player 8.

Adobe Systems Incorporated

.amr

Audacity

AMR is a compressed file format that functions to enhance speech coding, and it consists of multiple sampling rates narrowband devices used in encoding or decoding. Recording of AMR files can be done using mobile phones. For video and audio files to play simultaneously or accomplish random access memory, one can utilize the 3GPP format. 160 20- millisecond samples embedded in each frame are coded using AMR using ACELP, DTX, VAD, and CNG. Recorded AMR files can be converted into other files allowing their use and for them to be distributed.

AMR can encode signals ranging from 4.75 to 12.2 kbit/s with quality that begins at 7.4 kbit/s.3GPP took up file format in 1999. It is a method that is utilized by GSM and UMTS. It uses link adaptation to select one of the eight different bit rates. AMR optimizes link adaptation with the best codec devices for it to be used by radio channels and capacity requirements. This only works if the connection is good enough to prevent the loss of audio quality.

3rd Generation Partnership Project (3GPP)