thank you for taking out our mail from the list :)
asile 404
Le 21/02/2018 à 21:06, Patrick Perdue a écrit :
Opus is officially compatible with Icecast since, I think, version 2.3.3, which is pretty old now. Yes, Opus is primarily only useful for speech on the extreme low-end of the spectrum (6 to 16 kbps,) but is also just as good for general purpose audio when more bits are added. Just anecdotally, for example, I would compare 32kbps Opus in terms of surface quality to, perhaps, 64kbps ogg vorbis, or 96kbps mp3, at least in mono. In stereo, things get a little trickier, depending on the type of content you're encoding, and how complex the stereo image is. There is a lot of parametric encoding and band splitting going on, as Opus is primarily a hybrid of two codecs, CELT and SILK. The higher the bitrate, the more characteristics of CELT come into play, as SILK was designed primarily for speech. Therefore, with medium bitrates, SILK is used more on the low-end of the audio spectrum in order to save bits and mask encoding artifacts, and it does a great job at that.
What types of examples are you looking for? I can certainly encode a few types of things from uncompressed sources at various bitrates for anyone interested.
On 2/21/2018 12:24 PM, Gregory O'Drobinak wrote:
Hi!
It looks like Opus codec was designed more for speech coding than for good (general) audio. Do you have audio examples (not speech) of both Opus and Ogg for 64 Kbps?
I assume that Opus is also not compatible with the Losusonus server. Correct?
The three basic trade-offs for streaming are:
- quality/bandwidth
- power consumption
- network access
These items are all inter-related; there is no free lunch. For me, quality is of primary importance, so this drives up all costs.
Cost definitely rises as one's streamer becomes more remote due to the need for cellular wireless and stand-alone power. The farther away the streamer is, the more power is required to get the stream to a network socket.
The use of the wireless infrastructure of a commercial airplane is cheating in that regard. *:P tongue But I understand that scenario as a proof of concept for the possible use of low bitrates.
Having worked in the telecom industry doing testing with a plethora of codecs, I personally don't have much of a love for /any/ low bitrate codecs. But many people like them for various reasons, especially when cost is the major factor. But one gets what one pays for.
-Gregory
*From:* Patrick Perdue borrisinabox@gmail.com *To:* locustream@locusonus.org *Sent:* Wednesday, February 21, 2018 10:47 AM *Subject:* Re: [locustream] Streaming over 3G
Out of interest, has anyone looked at Opus for low bitrate streams? You can get some incredible results even at 16 to 32 kbps, technically even in stereo at those low bitrates, though the stereo width is narrow until you get above 64. The lower the bitrate, the more collapsed the stereo image.
The size-to-sound ratio is even better than AAC Plus, and definitely better than Ogg, although Opus isn't as widely supported for playback.
I recently did a 2.5 hour Opus stream from a commercial flight at 32 kb/sec just to see if I could hold it, and it worked well enough. This mostly featured radio communication patched into my phone, and I also had a cardioid dynamic mic I could pull up occasionally.
Certainly worth considering for streaming in areas where bandwidth is extremely limited.
On 2/21/2018 9:39 AM, paul@kristianpaul.org mailto:paul@kristianpaul.org wrote:
Thanks guys for the feedback On Tue, Feb 20, 2018 at 04:40:25PM +0000, Grant Smith wrote:
That s about what we find:
On Walney we use about 30GB per month at quality setting of 0.6 stereo
bw grant
On 20 Feb 2018, at 12:35, Ragnar Helgi Olafsson
<ragnar.helgi@gmail.com mailto:ragnar.helgi@gmail.com> wrote:
In my experience the monthly download (from running a 24/7 open
stream from the server) is around 30 GB.
Some of the streams are stereo, and some at a higher bitrate so
this number might go down if settings are adjusted for lower quality.
Best, r.
Með bestu kveðjum, r.
––––––––––––––––––––– Ragnar Helgi Ólafsson +354 8224858 ragnar.helgi@gmail.com mailto:ragnar.helgi@gmail.com
<mailto:ragnar.helgi@gmail.com mailto:ragnar.helgi@gmail.com>
On 20 February 2018 at 00:19, Patrick Perdue
<borrisinabox@gmail.com mailto:borrisinabox@gmail.com <mailto:borrisinabox@gmail.com mailto:borrisinabox@gmail.com>> wrote:
Hello:
I'm not entirely sure what the target bitrate is, but let's take
64 kbps as an example. With ogg, it's usually not CBR, but let's assume it is for estimates.
Assuming 64 kbps, that's about 28.2 Megabytes per hour, or about
675 megabytes per day.
A month with 31 days of continuous streaming at that bitrate will
consume roughly 20.4Gb.
On 2/19/2018 3:18 PM, paul@kristianpaul.org
mailto:paul@kristianpaul.org <mailto:paul@kristianpaul.org mailto:paul@kristianpaul.org> wrote:
Hi,
I'm seriously considering to move my streambox to a rural area, data plan costs is baiscally what concerns me, do you have an estimate of usage for a mono mic ogg setup _______________________________________________ Locustream / Locus Sonus Streaming Project http://locusonus.org/ http://locusonus.org/http://locusonus.org/ To unsubscribe, send a message to locustream-request@nujus.net
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