Does anyone have any insight on this?
> On Jul 5, 2017, at 12:44 24AM, Alex LaBranche <[email protected]> wrote: > > It seems that when I'm using fdkaac (the only aac encoder available now from > the looks of it) the highest bitrate it will output is 64k > > This is what I have configured... > > output.shoutcast(%fdkaac(channels=2,bitrate=256,samplerate=44100),icy_id=5,icy_metdata="true", > name="Radio - 256k > HE-AACv2",genre="Genre",url="https://www.domain.com",host="127.0.0.1",port = > 80,password = "radio:#5",radio) > > output.shoutcast(%fdkaac(channels=2,bitrate=128,samplerate=44100),icy_id=6,icy_metdata="true",name="Radio > - 128k > HE-AACv2",genre="Genre",url="https://www.domain.com",host="127.0.0.1",port = > 80,password = "radio:#6",radio) > > output.shoutcast(%fdkaac(channels=2,bitrate=64,samplerate=44100),icy_id=7,icy_metdata="true",name="Radio > - 64k > HE-AACv2",genre="Genre",url="https://www.domain.com",host="127.0.0.1",port = > 80,password = "radio:#7",radio) > > output.shoutcast(%fdkaac(channels=2,bitrate=24,samplerate=44100),icy_id=8,icy_metdata="true",name="Radio > - 24k > HE-AACv2",genre="Genre",url="https://www.domain.com",host="127.0.0.1",port = > 80,password = "radio:#8",radio) > > I have a separate script thats basically the same but its outputting mp3 (to > the first 4 sid's on the sc_serv) > > > The Shoutcast status page reports the correct bitrate, but reports half the > sample rate > > HE-AAC @ 256 kbps, 22.05 kHz > HE-AAC @ 128 kbps, 22.05 kHz > HE-AAC @ 64 kbps, 22.05 kHz > HE-AAC @ 24 kbps, 22.05 kHz > > Odd.. ok... lets have a closer look... > > > $ ffprobe -hide_banner http://127.0.0.1/stream/?sid=5 > Input #0, aac, from 'http://127.0.0.1/stream/?sid=5': > Metadata: > icy-notice1 : <BR>This stream requires <a > href="http://www.winamp.com";>Winamp</a><BR> > icy-notice2 : SHOUTcast DNAS/posix(linux x64) v2.5.1.724<BR> > icy-name : Radio > icy-genre : Genre > icy-br : 256 > icy-sr : 22050 > icy-url : https://www.domain.com > icy-pub : 1 > Duration: N/A, bitrate: 62 kb/s > Stream #0:0: Audio: aac (HE-AACv2), 44100 Hz, stereo, fltp, 62 kb/s > > > So liquidsoap is sending the configured bitrate, and half the configured > samplerate as metadata > > But is actually sending at 64kbps 44100 Hz > > > A look at the 24k... > > icy-br : 24 > icy-sr : 22050 > icy-url : https://www.domain.com > icy-pub : 1 > Duration: N/A, bitrate: 22 kb/s > Stream #0:0: Audio: aac (HE-AACv2), 44100 Hz, stereo, fltp, 22 kb/s > > Ok its got the bitrate and the sample rate correct in the actual stream, but > again fails at the icy-sr at only half > > And for the 128k... > > icy-br : 128 > icy-sr : 22050 > icy-url : https://www.domain.com > icy-pub : 1 > Duration: N/A, bitrate: 64 kb/s > Stream #0:0: Audio: aac (HE-AACv2), 44100 Hz, stereo, fltp, 64 kb/s > > And the 64k... > > icy-br : 64 > icy-sr : 22050 > icy-url : https://www.domain.com > icy-pub : 1 > Duration: N/A, bitrate: 66 kb/s > Stream #0:0: Audio: aac (HE-AACv2), 44100 Hz, stereo, fltp, 66 kb/s > > > Now lets try mediainfo > > 256k > > General > Complete name : http://127.0.0.1/stream/?sid=5 > Format : ADTS > Format/Info : Audio Data Transport Stream > Overall bit rate mode : Variable > > Audio > Format : AAC > Format/Info : Advanced Audio Codec > Format version : Version 4 > Format profile : HE-AACv2 / HE-AAC / LC > Bit rate mode : Variable > Channel(s) : 2 channels / 1 channel / 1 channel > Channel positions : Front: L R / Front: C / Front: C > Sampling rate : 44.1 kHz / 44.1 kHz / 22.05 kHz > Frame rate : 21.533 FPS (1024 spf) > Compression mode : Lossy > Stream size : 0.00 Byte > > > 128k > > General > Complete name : http://127.0.0.1/stream/?sid=6 > Format : ADTS > Format/Info : Audio Data Transport Stream > Overall bit rate mode : Variable > > Audio > Format : AAC > Format/Info : Advanced Audio Codec > Format version : Version 4 > Format profile : HE-AACv2 / HE-AAC / LC > Bit rate mode : Variable > Channel(s) : 2 channels / 1 channel / 1 channel > Channel positions : Front: L R / Front: C / Front: C > Sampling rate : 44.1 kHz / 44.1 kHz / 22.05 kHz > Frame rate : 21.533 FPS (1024 spf) > Compression mode : Lossy > Stream size : 0.00 Byte > > > 64k > > General > Complete name : http://127.0.0.1/stream/?sid=7 > Format : ADTS > Format/Info : Audio Data Transport Stream > Overall bit rate mode : Variable > > Audio > Format : AAC > Format/Info : Advanced Audio Codec > Format version : Version 4 > Format profile : HE-AACv2 / HE-AAC / LC > Bit rate mode : Variable > Channel(s) : 2 channels / 1 channel / 1 channel > Channel positions : Front: L R / Front: C / Front: C > Sampling rate : 44.1 kHz / 44.1 kHz / 22.05 kHz > Frame rate : 21.533 FPS (1024 spf) > Compression mode : Lossy > Stream size : 0.00 Byte > > > 24k > > General > Complete name : http://127.0.0.1/stream/?sid=8 > Format : ADTS > Format/Info : Audio Data Transport Stream > Overall bit rate mode : Variable > > Audio > Format : AAC > Format/Info : Advanced Audio Codec > Format version : Version 4 > Format profile : HE-AACv2 / HE-AAC / LC > Bit rate mode : Variable > Channel(s) : 2 channels / 1 channel / 1 channel > Channel positions : Front: L R / Front: C / Front: C > Sampling rate : 44.1 kHz / 44.1 kHz / 22.05 kHz > Frame rate : 21.533 FPS (1024 spf) > Compression mode : Lossy > Stream size : 0.00 Byte > > > Looks like the channels are procreating and is reporting as variable bitrate > when the default for fdkaac is cbr. > > From their docs.. > > • AACENC_BITRATEMODE Bitrate mode. Configuration can be different kind > of bitrate configurations- : > > <page37image15360.png> > 0: Constant bitrate, use bitrate according to AACENC_BITRATE. (default) > Within none LD/ELD ::AUDIO_OBJECT_TYPE, the CBR mode makes use of full > allowed bitreservoir. In contrast, at Low-Delay ::AUDIO_OBJECT_TYPE the > bitreservoir is kept very small. > 8: LD/ELD full bitreservoir for packet based transmission. > > > $ liquidsoap --version > Liquidsoap 1.3.1 > (git://github.com/savonet/liquidsoap.git@cbfcd6004d7dba7211cd1d33a38fe192e1da9219:20170702:171027) > > This is all very odd so if anyone can shed some light that would be awesome... > > Cheers, > > -alex > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! > http://sdm.link/slashdot_______________________________________________ > Savonet-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/savonet-users
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