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Convert F4V to AMR
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Total Audio MP3 Converter converts F4V files to AMR format.
The software is an all in one audio converter that supports more than 90 audio
and video files as input, and converts to popular formats such as MP3, WAV, AAC,
M4A, OGG, WMA, and AMR.
Total Audio MP3 Converter also supports batch conversion, and is full compatible
with Vista and Windows
7.
- Free Download
Total Audio MP3 Converter here and then install the software
by instructions
- Launch Total Audio MP3 Converter
- Choose F4V Files
Click "Add Files" to choose F4V files and then add them to conversion
list.
Choose one or more F4V files you want to convert and then click Open.
- Choose "to AMR"
- Convert F4V to AMR
Click button "Convert" to convert all F4V files to AMR format.
The software is converting F4V files to AMR format.
- Play & Browse
When conversion completes, you could right-click converted item and choose "Play
Destination" to play the destination file; or choose "Browse Destination
Folder" to open Windows Explorer to browse the destination file.
Top
What is F4V?
The F4V is another Flash Video file format defined by Adobe Systems and supported
in Adobe Flash Player 9 Update 3 (9,0,115,0). The F4V file format is based on
the format specified by ISO/IEC 14496-12: ISO base media file format.
Unlike SWF files, F4V files store multibyte integers in big-endian byte order.
For example, as a UI16 in SWF file format, the byte sequence that represents the
number 300 (0x12C) is 0x2C 0x01; as a UI16 in F4V file format, the byte sequence
that represents the number 300 is 0x01 0x2C.
The F4V format is based on the ISO MP4 format, which in turn is based on the
Apple QuickTime container format. The subsets of the format support different
features. The ftyp box helps identify the features that a program must support
to play a particular file. Flash Player does not enforce any restrictions with
respect to ftyp boxes. The program tries to play any file it is given, within
the restrictions of the codec types it supports.
What is AMR?
Adaptive Multi-Rate (AMR) is an audio data compression scheme optimized for speech
coding. AMR was adopted as the standard speech codec by 3GPP in October 1998 and
is now widely used in GSM and UMTS. It uses link adaptation to select from one
of eight different bit rates based on link conditions. AMR is also a file format
for storing spoken audio using the AMR codec. Many modern mobile telephone handsets
will allow you to store short recordings in the AMR format. There also exists
another storage format for AMR that is suitable for applications with more advanced
demands on the storage format, like random access or synchronization with video.
This format is the 3GPP-specified 3GP container format based on ISO base media
file format.
Key Features:
- Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to
200-3400 Hz.
- The AMR codec uses eight source codecs with bit-rates of 12.2, 10.2, 7.95,
7.40, 6.70, 5.90, 5.15 and 4.75 kbit/s.
- Generates frame length of 95, 103, 118, 134, 148, 159, 204, or 244 bits for
bit rates 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2, or 12.2 kbit/s, respectively
- AMR utilizes Discontinuous Transmission (DTX), with Voice Activity Detection
(VAD) and Comfort Noise Generation (CNG) to reduce bandwidth usage during silence
periods
- Algorithmic delay is 20 ms per frame. For bit-rates of 12.2, there is no 'algorithm'
look-ahead delay. For other rates, look-ahead delay is 5 ms. Note that there is
5 ms 'dummy' look-ahead delay, to allow seamless frame-wise mode switching with
the rest of rates.
- AMR is a hybrid speech coder which uses Algebraic Code Excited Linear Prediction
(ACELP)
- The complexity of the algorithm is rated at 5, using a relative scale where
G.711 is 1 and G.729a is 15.
- PSQM testing under ideal conditions yields Mean Opinion Scores of 4.14 for
AMR (12.2 kbit/s), compared to 4.45 for G.711 (u-law)
- PSQM testing under network stress yields Mean Opinion Scores of 3.79 for AMR
(12.2 kbit/s), compared to 4.13 for G.711 (u-law)
Convert F4V to AMR Related Topics:
DXA to AMR,
NSV to AMR,
MO3 to AMR,
CDA to AMR,
AMR to MP4,
AMR to WAV,
MTV to AMR,
OMA to AMR,
RPL to AMR,
3GPP to AMR,
VMD to AMR,
Resample AMR,
XVID to AMR,
MPA to AMR,
MVI to AMR,
S3M to AMR,
PSX to AMR,
MP2 to AMR,
MKV to AMR,
MOD to AMR,
DV to AMR,
GXF to AMR,
VOC to AMR,
F4A to AMR,
MLP to AMR,
WMD to AMR,
HDTV to AMR,
STR to AMR,
SMK to AMR,
VID to AMR,
FLIC to AMR,
DTS to AMR,
OGM to AMR,
ULAW to AMR,
VCD to AMR,
QCP to AMR,
MPGA to AMR,
3G2 to AMR,
W64 to AMR,
XA to AMR
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