Technical reasons :
Generally, to play back video files ( like 3gp Mp4 avi etc.. ) you need software called " Codec packs ". codec packs which helps you to play all major audio and video formats.
Generally, to play back video files ( like 3gp Mp4 avi etc.. ) you need software called " Codec packs ". codec packs which helps you to play all major audio and video formats.
What a codec is?
Codec (encoder/Decoder or Compressor / Decompressor) software that compresses and decompresses audio and video data streams.
A codec can consist of two components. an encoder and a decoder. The encoder performs the compression function [ call " Encoding " ] and the decoder performs the decompression function it [ call " decoding "] . Some codecs include these two components and some codecs only include one of them.
Download Codec packs : K lite codec pack Xp codeck pack
Codec Examples :
SPEECH CODECS
Speech is a Subset of Audio : Audio codecs cover all sound whether spoken words or music. However, in order to create the most compressed digital data, speech codecs look for sound patterns commonly heard in a spoken language.
Name Purpose A-Law PCM telephony in Europe
µ-Law PCM telephony in U.S.
DV Audio MiniDV audio
GSM 6.10 GSM cellphone
G.711 A/V conferencing (ITU)
G.722 A/V conferencing (ITU)
G.723.1 VoIP, A/V conferencing (ITU)
G.728 A/V conferencing (ITU)
G.729 A/V conferencing (ITU)
AMR-NB GSM, 3GPP (ETSI narrowband)
AMR-WB GSM, 3GPP (ETSI wideband)
ACELP.net General speech (VoiceAge)
ACELP.wide High quality (VoiceAge)
SOUNDTRACK CODECS
Name Origin
MP2 MPEG-2
Dolby Digital Dolby Labs
DTS DTS, Inc.
MUSIC CODECS
Name Origin
MP3 MPEG
AAC MPEG
AAC Protected MPEG with DRM
WMA Windows
WMA Protected Windows with DRM
WMA Lossless Windows high quality
RA, RAM RealNetworks
AIFF Macintosh
AU Sun
ACELP.live VoiceAge
Ogg Vorbis Open source high quality
FLAC Open source high quality
Apple Lossless High quality
DSD High quality (SACD)
DVD-Audio High quality
VIDEOCONFERENCING CODECS
Name Origin
H.261 ITU
H.263 ITU
MOVIE CODECS
Name Origin
MPEG-1 Video CD
MPEG-2 DVD
MPEG-4 DivX, etc)
H.264 Enhanced MPEG-4
FLV Flash video
VC-1 SMPTE
AVI Windows
WMV Windows
RM, RV RealNetworks
Indeo Intel
Cinepak SuperMac Technologies
Sorenson Sorenson Media
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