search for: downmixes

This patch adds a new option "channel-mapping" to opusenc which sets the channel mapping family used by the multistream encoder. Please let me know whether adding this option is worthwhile and whether the help string is okay. I tried to keep it short but accurate. The error message for an unimplemented channel mapping is "Error cannot create encoder: request not implemented".

...is "decoder" defaults to simple 4.0 if the player says its multi-channel but doesn't specify how many. We should be able to force select the simple 4.0 5.0 .. 7.0 Speaker Decodes do deal with older 'dumb' players. b) stereo support. >simulated blumlein are the simplest downmixes and could be added with a very minimal amount of code. They are also the least satisfactory. As most of the prize winning recordings made with Soundfield mikes have used them in plain stereo mode, usually Blumlein (eg the Chesky's) I don't think we should look down on simple Blumlein. The...

Hi! I haven't looked into the code yet, but the patch uses different coding conventions like "if(" and "if ("; like wise "){" and ") {". My personal taste is to have spaces after keywords, but that's just me. I'd prefer a consistent coding style. Regards, Ulrich >>> Michael Graczyk <mgraczyk at google.com> schrieb am 26.04.2016

While integrating 1.1, I ran into some errors with my compiler and, after examining the code, saw what might be some invalid pointer math in opus_encoder.c. In optimize_framesize(), the first parameter 'x' is typed as opus_val16 and pointer math is done on the variable (in the 'if (buffering)' block) and then x is passed to the downmix function. I see that the downmix function uses

Hi Opus list. I subscribed because your discussion on the IETF draft ("Ambisonics in an Ogg Opus Container") was mentioned on the sursound list. I tried Opus for ambisonics more than a year ago. It does works with uncoupled channels (I had to patch the encoder). I don't know what else could be done to optimize support for ambisonics, as I'm not a codec expert. So I think that

On Aug 07 08:30:31, hans at stare.cz wrote: > On Aug 07 00:41:52, petrparizek2000 at yahoo.com wrote: > > ????#1. To test encoding at low bitrates, I encoded a sine sweep at 12 kbps > > with Opusenc and then decoded the resulting file with Opusdec. > 1) Opusenc --bitrate 12 --downmix-mono Sweep50.wav Sweep50.opus Why are you using a stereo file containing the same sweep in both

On Sun, 2003-11-23 at 00:35, Kerry Cox wrote: > Now I tried to add a third stream by adding the following <instance> to > the above config: > > <instance> > <hostname>xx.xxx.x.xxx</hostname> > <port>8000</port> > <password>secretpasswd</password> >

...e an essential feature in the libraries. Most users will not have software or systems which are equipt to play b-format Vorbis files, at least initally. Anyone distributing such files will have a hard time if the files refuse to play at all for people. Mono, and simulated blumlein are the simplest downmixes and could be added with a very minimal amount of code. They are also the least satisfactory. I think mono output would be especially surprising to the user and it probably shouldn't be considered as an automated fallback unless we have no other choice. UHJ, Binaural, and actual speaker feeds...

First let me say that I was absolutely astounded at the sound quality when using oggenc at q = -1 (around 50 kbps). So much so, that I'm anxious to try some of the lower bit rates that were mentioned in the announcement for 1.0: ... audio and music at fixed and variable bitrates from 16 to 128 kbps/channel. But I am having trouble finding how to use either oggdrop or oggenc to get these

Hi Marc, On Sat, May 28, 2016 at 10:44 AM, Marc Lavallée <marc at hacklava.net> wrote: > I subscribed because your discussion on the IETF draft ("Ambisonics in > an Ogg Opus Container") was mentioned on the sursound list. Thanks for your interest! Please feel free to voice your support for this work on the codec at ietf.org mailing list. The more support the better. > I

Folks: I'm trying to set up a streaming server under Fedora Core 2 using Icecast 2.2.0. Everything compiles; everything runs. There are no indications of a problem in any of the log files. When I look at http://192.168.0.128:8000/status.xsl, everything looks ok. But when I click on "Click to listen", it brings up xmms, but there's no indication of audio, and xmms shows a bit

Can someone who really knows the Ogg command-line encoder, help recommend the best setting for 33.6k modem stereo music streaming? (56k doesn't count cuz many people's 56k modems don't work at a full 56k, and I want them to be able to surf CD Baby at the same time as listening. 2 minutes / 120 seconds of audio should be about 400k.) I'm at my wit's end: tried everything I

It was kind of working for a while but I could not hear the stream but it was running. I started messing with alsamixer and now it crashes. I see the error but I don't know how to fix it. ices-oss-xml: (alsa is the same just a different input module) <?xml version="1.0"?> <ices> <!-- run in background --> <background>0</background>

Hi: With regard to multiple streams, yes you can use streamtranscoder, but you can also do it in ices (provide multiple ogg streams, that is). Here's an excerpt from the config I maintain to show how it's done. <instance> <hostname>linux-speakup.org</hostname> <port>9000</port>

On 2006-06-21T15:21+0100 Karl Heyes wrote: > You capture at 48000 but resample from 44100, that will cause problems. > You resample to 22050 so that will affect quality, you haven't said what > bitrate you want to target for, so resampling/downmixing may be required > anyway. I am unsure about these settings. Any particular suggestions? I don't quality with voice, just

Hi, I would like to create an output file with mono audio. How to do it ? If use a video with mono as input, the result will be a video with stereo. Is there a way to use the --downmix from oggenc ? Regards -- ZikZak

I've run into some issues using Opus with source files in channel layouts other than the default 8. For instance, 2.1 isn't supported, so I have to either downconvert to 2.0 or upconvert to 5.1 (which usually involves adding empty channels, which prevents the playback device from upconverting to the native layout). To address this, I've put together an initial draft of an I-D I'd

darkice is an execellent bit of software, very well written. and the author of the darkice software, akos, is very active on the darkice ML. http://yp.tilos.hu:9000/tilos_high.ogg <= for a darkice stream. b. On Sat, Nov 22, 2003 at 12:05:55PM -0500, Brendan Cully wrote: > On Saturday, 22 November 2003 at 10:50, Kerry Cox wrote: > > So basically, I download and install ices 0.3,

Hi: Well, up until about a week ago, we had our stream up and running on 3 seperate mountpoints and it was rock solid. then we started hitting problems with disconnects and the like. I recompiled everything this morning and set it running again. But one mount has died already. We have 3 streams running. the first is the ogg files as they were encoded (egoplay.ogg). the second is a

Geoff Shang said: >Hi: >hmmm, you don't show the ices log for when it disconnnects. Is nothing >printed about that? >And can you post your ices config? This might help determine the problem. I noticed something this morning. I'm using SSH to login in, and when I run ices it pops an hexadecimal error up on the server screen itself. If I go to the server and run ices I get