JMF 2.1.1支援视音频格式

Media Type

RTP
Payload

JMF 2.1.1
Cross Platform Version

JMF 2.1.1
Solaris/Linux Performance Pack

JMF 2.1.1
Windows Performance Pack

Audio: G.711 (U-law) 8 kHz 

0

R,T

R,T

R,T

Audio: GSM mono 

3

R,T

R,T

R,T

Audio: G.723 mono

4

R

R,T

R,T

Audio: 4-bit mono DVI 8 kHz 

5

R,T

R,T

R,T

Audio: 4-bit mono DVI 11.025 kHz 

16

R,T

R,T

R,T

Audio: 4-bit mono DVI 22.05 kHz 

17

R,T

R,T

R,T

Audio: MPEG Layer I, II 

14

R,T

R,T

R,T

Video: JPEG (420, 422, 444)* 

26

R

R,T

R,T

Video: H.261 

31

-

R

R

Video: H.263**

34

Mode A Only

R,T

R,T

Video: MPEG-I***

32

T

R,T

R,T

JMF 2.1.1 - Supported Formats

This page lists the media formats supported in the JMF 2.1.1 FCS implementation, the RTP formats this implementation can receive and transmit, and the capture devices that it supports.

JMF supports audio sample rates from 8KHz to 48KHz. Note that cross-platform version of JMF only supports the following rates: 8, 11.025, 11.127, 16, 22.05, 22.254, 32, 44.1, and 48 KHz.

The JMF 2.1.1 Reference Implementation supports the media types and formats listed in the table below. In this table:

• D indicates the format can be decoded and presented.
• E indicates the media stream can be encoded in the format.
• read indicates the media type can be used as input (read from a file)
• write indicates the media type can be generated as output (written to a file)

Notes:

• ACM** - Window's Audio Compression Manager support. Tested for these formats: A-law, GSM610, MSNAudio, MSADPCM, Truespeech, mp3, PCM, Voxware AC8, Voxware AC10.
• VCM** - Window's Video Compression Manager support.  Tested for these formats: IV41, IV51, VGPX, WINX, YV12, I263, CRAM, MPG4.

The JMF 2.1.1 Reference Implementation can receive and transmit the following RTP formats:

• R indicates that the format can be decoded and presented.
• T indicates that media streams can be encoded and transmitted in the format.

* JPEG/RTP can only be transmitted in video dimensions that are in multiple of 8 pixels. 

** H.263/RTP can only be transmitted in 3 different video dimensions: SQCIF (128x96), QCIF (176x144) and CIF (352x288). 

*** MPEG/RTP video can only be transmitted from pre-encoded MPEG content, i.e. from an MPEG-encoded file or MPEG enabled capture source. Real-time software MPEG encoding is not feasible for RTP transmission. 

The JMF 2.1.1 Reference Implementation supports SunVideo / SunVideoPlus capture devices on Solaris. On Windows, most capture devices that have VFW drivers are supported. On Linux, devices that have a Video4Linux driver are expected to work, but not extensively tested. The table below lists the capture devices known to work with this release.