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Hello everyone, I'm currently developing an adaptive videoconferencing application based on Ekiga which uses TFRC as a congestion control mechanism to adapt the video encoding rate according to the quality of the network experienced. My goal was to use the open-source Theora codec for video transmission. Unfortunately, it seemed that Theora 1.0 did not properly implement any correct CBR mode.

Dear all I'm currently using a simple encoding implementation based on the encoding example delivered with theora. Now i tried to change the quality of the output file. Its my understanding, that either a bitrate can be set for Constant Bitrate (CBR) encoding, or a quality (0-63) for Variable Bitrate (VBR). As you might know, the basic Encoder Example uses the so-called 2-Pass method for

4) Subtract 1 from the keyframe, then repeat step 3). 5) Begin reading from the frame discovered in step 4. Drop any packets which are output on the first page. Count down until we reach the keyframe, dropping packets until then. 6) Continue counting down until we reach the target frame, we are now decoding each frame/packet. At the target frame produce the YUV output. Steps 4 and 5 are

selected for the great NETVC project.It complicates a little the future of the nhw codec, and it is furthermore nearly to end of life, with more than 3 years on the Theora channel without catching attention. I still think that the NHW codec could be useful for portable devices, as it is very fast with a low power consumption, and with more neatness/sharpness.If you are developing such a project

selected for the great NETVC project.It complicates a little the future of the nhw codec, and it is furthermore nearly to end of life, with more than 3 years on the Theora channel without catching attention. I still think that the NHW codec could be useful for portable devices, as it is very fast with a low power consumption, and with more neatness/sharpness.If you are developing such a project

Here's the problem: > 2) Encoding with rate control as in single pass "Bitrate > control" will not > lead to better quality than fixed quant (with the right value > of the fixed > quant). Ratecontrol doens't know anything about "quality". It > will try to > reach more-or-less CBR. > > But somehow this is not a fair comparison, because

Hi, Opus team I'm Huang Hao and trouble you again. When I used the OpusRepacketizer as Jean-Marc mentioned, I got a result (maybe problem I'm not sure) that perplexes me, please give me some comments. The result be described as below: First(all init which are needed I have done), I used opus_encode() to get the encoded data successfully. The encoder control parameters are set: VBR=0,

I'm pleased to announce the first alpha release of the rewrite of the Xiph.org reference encoder for the Theora video format, codename "Thusnelda". http://downloads.xiph.org/releases/theora/libtheora-1.1alpha1.tar.bz2 http://downloads.xiph.org/releases/theora/libtheora-1.1alpha1.zip http://downloads.xiph.org/releases/theora/libtheora-1.1alpha1.tar.gz Please download one of

I'm pleased to announce the first alpha release of the rewrite of the Xiph.org reference encoder for the Theora video format, codename "Thusnelda". http://downloads.xiph.org/releases/theora/libtheora-1.1alpha1.tar.bz2 http://downloads.xiph.org/releases/theora/libtheora-1.1alpha1.zip http://downloads.xiph.org/releases/theora/libtheora-1.1alpha1.tar.gz Please download one of

tried a couple of times to stream files using it's "Direct Media URL" = and it hasn't really worked. I will at some point start porting my little Nokia S60 ogg player to = iPhone, but that's a long way off (probably six months at the rate I'm = going). If you want a phone theora player I recommend going on EBay and = picking up a Nokia N82 and then installing my ogg

Emscripten is an LLVM-to-JavaScript compiler. It takes LLVM bitcode - which can be generated from C/C++, using llvm-gcc or clang, or any other language that can be converted into LLVM - and compiles that into JavaScript, which can be run on the web (or anywhere else JavaScript can run). I was able to successfully build libogg, libvorbis and libvorbis examples using this tool and generate valid

Hi All, I've run into a small hiccup in encoding my audios with Speex. When I encode audience laughter and applause with 'speexenc' (version 1.0.1), the result is quite acceptable... until I enable VBR. Then it distorts horribly. My understanding of VBR is that it frees the encoder to vary the number of bits emitted to better maintain the quality requested, and so I would have

Hi Sahana I must admit I'm not an expert in Theora. But the error message "Could not set keyframe interval to 64" might indicate that an attempt to set the keyframe frequency failed. Have a look at the keyframe_granule_shift attribute in the th_info struct. It says: The maximum distance between key frames is 1<<keyframe_granule_shift. So I could imagine that the error might

Hi, Regarding to my previous question, I think I have found out from oggenc source code that the correct way to initialize encoding is: vorbis_encode_init_vbr (or vorbis_encode_setup_managed for cbr etc.) vorbis_encode_ctl (to turn off or use avg bitrate management) vorbis_encode_setup_init By this way, there is no problem with encoded stream. However, there is no documentation of the three

<br> 4) Subtract 1 from the keyframe, then repeat step 3).<br> <br> 5) Begin reading from the frame discovered in step 4. Drop any packets<br> which are output on the first page. Count down until we reach the<br> keyframe, dropping packets until then.<br> <br> 6) Continue counting down until we reach the target frame, we are now<br> decoding each

I scanned the website with linkchecker and found quite a lot of dead links. This commit fixes or removes them. --- developers.html | 2 +- documentation_tasks.html | 2 +- download.html | 12 ++++++------ faq.html | 2 +- features.html | 2 +- feeds/feed.xml | 8 ++++++++ format.html | 8 ++++----

I scanned the website with linkchecker and found quite a lot of dead links. This commit fixes or removes them. --- developers.html | 2 +- documentation_tasks.html | 2 +- download.html | 14 +++++++------- faq.html | 2 +- features.html | 2 +- feeds/feed.xml | 8 ++++++++ format.html | 8 ++++----

Shows that as the MCU increases, the OpenMP extra overhead is amortized and OpenMP becomes as fast as the pthreads implementation. The last chart http://lampiao.lsc.ic.unicamp.br/~piga/gsoc_2008/systime.png Shows that both pthreads and OpenMP overhead decreases as what seems to be a logarithmic function of the MCU size. This was a great experiment, and from what I can conclude, the OpenMP

Internal sip UAs are registered in local SIP Proxy. When there is an incoming call from external network some extension in dialplan is invoked. After this asterisk verifies mapping between dialed external user (invoked extension) and target user in internal network it dials internal user with the usage of following marco: exten => s,1,NoOp(-- Internal call to: ${MACRO_EXTEN}) exten =>

Hi, I try to use the video tag to post videos on my blog I'm using ffmeg2theora to transcode videos in theora Resolution of 320x240 pixels and constant bitrate (CBR) of ~400 kbps seems to be ok for publishing on my blog. I've read that CBR is a better choice than VBR for web publishing regarding the way TCP/IP works. ("In TCP it takes a while for a connection to increase its