Difference between revisions of "AMR"
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m (Add codec ids samr and sawb) |
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| − | + | {{Codec audio|id=samr}} | |
| − | + | {{Codec audio|id=sawb}} | |
| − | + | {{Mmwiki|AMR|AMR-NB|label2=AMR (narrow band)|AMR-WB|label3=AMR (wide band)}} | |
| + | {{Wikipedia|Adaptive Multi-Rate audio codec|l1=AMR format}} | ||
| − | + | == Tutorial == | |
| + | To stream amr-nb with vlc to mobile-phone eg. next setting works (tested on few nokia & sony ericsson phones) | ||
| − | + | <pre> | |
| + | transcode{vcodec=H263,width=128,height=96,vb=28,fps="12.5",acodec=samr,ab="5.25",samplerate=8000, | ||
| + | channels=1,venc=ffmpeg{keyint=6,strict=1,strict-rc=1}}:rtp{mp4a-latm,port-video=2244,port-audio=2242,dst=1 | ||
| + | 27.0.0.1,ttl=12,sdp=\"file:///usr/local/movies/mobile.sdp\"}</pre> | ||
| − | + | It seems that mp4a-latm somehow affects on audio-output on amr also. AMR-NB requires 8000 [[samplerate]] and only 1 channel, also if you choose incorrect audio-[[bitrate]], vlc gives you <samp>unknown codec</samp> or similar error. | |
| − | </ | ||
Latest revision as of 09:02, 9 April 2019
samr
|
This is an audio codec. The name to use at the command line is samr. |
sawb
|
This is an audio codec. The name to use at the command line is sawb. |
Tutorial
To stream amr-nb with vlc to mobile-phone eg. next setting works (tested on few nokia & sony ericsson phones)
transcode{vcodec=H263,width=128,height=96,vb=28,fps="12.5",acodec=samr,ab="5.25",samplerate=8000,
channels=1,venc=ffmpeg{keyint=6,strict=1,strict-rc=1}}:rtp{mp4a-latm,port-video=2244,port-audio=2242,dst=1
27.0.0.1,ttl=12,sdp=\"file:///usr/local/movies/mobile.sdp\"}
It seems that mp4a-latm somehow affects on audio-output on amr also. AMR-NB requires 8000 samplerate and only 1 channel, also if you choose incorrect audio-bitrate, vlc gives you unknown codec or similar error.
