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/usr/share/farstream/0.1/fsrtpconference/default-codec-preferences is in libfarstream-0.1-0 0.1.2-1ubuntu3.

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################
# Audio codecs #
################

[audio/SPEEX:8000]
clock-rate=8000

[audio/SPEEX:16000]
clock-rate=16000

[audio/AMR]

[audio/G729]

[audio/ILBC]


# Disabled audio codecs
# These are unsuitable for calling

[audio/DV]
id=-1

[audio/MPA]
id=-1

[audio/VORBIS]
id=-1

[audio/MP3]
id=-1

################
# Video codecs #
################

[video/H264]
#feedback:tfrc=
feedback:nack/pli=

[video/H263]
feedback:nack/pli=

[video/THEORA]
#feedback:tfrc=
feedback:nack/pli=

[video/JPEG]

# Disable the ones we don't want

[video/DV]
id=-1

[video/MPV]
id=-1

# Payloader is broken, see gnome bug #577784
[video/H263-2000]
id=-1

#[rtp-hdrext:video:0]
#id=3
#uri=urn:ietf:params:rtp-hdrext:rtt-sendts