http://blog.gmane.org/gmane.comp.multimedia.ogg.theora.general hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4053 <pre>Hello, Just contact you quickly as I have improved precision of my codec (a little) and I have updated my demo page: http://nhwcodec.blogspot.com/ .This version seems a little better. I will also certainly have to do an image comparison with other codecs, Google WebP for example, which has a very impressive precision, and to show that my codec would have less precision but maybe a little more neatness. Any comment would be really appreciated. Many thanks, Raphael _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Raphael Canut 2012-05-25T17:26:18 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4052 <pre>Hello, Can anyone help me write Ogg Theora files player in Visual C++ 2008? I built and added to the CLR Empty Project: - libogg-1.3.0, libtheora-1.1.1, libvorbis-1.3.2 (http://www.xiph.org/downloads/) - PortAudio_v19_20111121 (http://portaudio.com/archives/pa_stable_v19_20111121.tgz) - SDL-1.2.15 (http://www.libsdl.org/release/SDL-devel-1.2.15-VC.zip) What next? First I would like to play the *.ogv file. I know that in revision 11431 of Theora (http://svn.xiph.org/trunk/theora) there is splayer.c (win32\experimental\splayer\), but when I try to compile it Visual C++ shows many errors. Besides this in the revision 11431 there aren't all required libraries (for example ogg, vorbis, PortAudio). Best regards, Maciej Mączyński_______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Maciej Mączyński 2012-05-14T08:49:43 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4050 <pre>Hello, Just contact you quickly again, for those interested, I have made a new version of my codec with a little more precision.This version seems a little better, -I have updated my demo page: http://nhwcodec.blogspot.com/ -.If you would have time, any comment (or critics) from the Xiph Community would be really very appreciated. (Also I made a previous update to correct a bug, if there would be some images where my codec bugs, do not hesitate to let me know, would be also very helpful)... Many thanks, Raphael _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Raphael Canut 2012-05-11T16:11:16 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4047 <pre>Hello there, I have been working on an alternative version of the png2theora example: The basic idea is to change the input of the program, using a QImage [1] variable instead of a png array. This is my base file: http://www.maefloresta.com/tmp/example.cpp The point where I am stuck starts at this comment: // LOOK HERE (line 313) And here is the issue: QImage supports RGB images, so my first task is to transform the content of the QImage variable from RGB to YUV. Here is the code I already use to do the trick with a ffmpeg API and it works: http://www.maefloresta.com/tmp/rgb2yuv.txt The function prototype is this: void RGBtoYUV420P(const uint8_t *bufferRGB, uint8_t *yuv, uint iRGBIncrement, bool bSwapRGB, int width, int height) Now, to write a theora frame I'm trying to use the function from the example (png2theora.c): static int theora_write_frame(unsigned long w, unsigned long h, unsigned char *yuv, int last) So, what is my problem? In the function RGBtoYUV420P(), my input variable to save the YUV data is: uint8_t *yuv In the function theora_write_frame(), my input variable for the YUV data must be: unsigned char *yuv As you already noticed it, I have to deal with a conflict of types. I was trying to cast the yuv variable from "uint8_t" to "unsigned char" and vice versa with no luck. The ogv file exported is always corrupted. How can I fix my example file to make it work? Any suggestion? Thanks. [1] http://qt-project.org/doc/qt-5.0/qimage.html </pre> Gustav González 2012-04-18T02:15:24 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4045 <pre>(Mail translated from French) Hello, I would like to receive news on the development of libtheora 1.2 (Theora 1.2) For nothing for 17 months, since the availability of version alpha1. I ask because I have to choose a codec. And theora 1.2 alpha1 is fine. But I do not want to use, if it is abandoned. Thank you in advance for your response. Claude Beytrison </pre> BUP 2012-03-31T09:18:04 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4043 <pre>Hello, Is is a great pleasure to post on a Xiph IRC Channel.I contacted you to have your advice and comment about wavelets for image/video compression, as I have made a wavelet-based image compression codec. I know that currently the best image/video compression codecs use the DCT block-based transform, like JPEG, Ogg Theora and the recent Google WebP, for example, but what would you think of wavelet transform? Here is the link for my wavelet-based image compression codec: http://nhwcodec.blogspot.com/ I am still trying to improve my codec, and so any comments and advice are very welcome.I had few, but great discussions with Monty Montgomery and he also encouraged me to post and present my work on the channel. Very quickly, the main features would be a fast decoder and maybe a good neatness.You can find few results on the demo page.You can also download the win32 binaries to test it. -I am planning to give the source code and algorithm detail rather quickly, but currently the codec is absolutely not finalized, I am changing algorithm every month currently(...), would also have to adapt the codec to any size of image, code 30-40 quality settings,... the current version is just a very first (but functional) one.- Do not hesitate to leave any comment and advice on this work, if you would have time, would be really so much appreciated, and/or in general what do you think of wavelets for image compression? Many thanks! Best regards, Raphael _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Raphael Canut 2012-03-14T13:11:01 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4042 <pre>Hi, has anybody checked this out? http://icculus.org/theoraplay/ Quote: TheoraPlay is a simple library to make decoding of Ogg Theora videos easier. --- It looks like it could be very useful. Cheers, Kyungjoon Lee </pre> Kyungjoon Lee 2012-01-02T10:12:15 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4038 <pre>I have vorbis audio files on a remote server. I want to be able to listen to these files on my local machine using something like winamp. If I point winamp directly at the file using its url (something like http://www.example.com/file.ogg), the file plays, but is not seekable. If I do the same with .mp3 files, seeking works fine. I thought this might be a winamp issue, but trying to seek on a remote .ogg file using Firefox’s implementation of html5 audio element also fails; it works fine locally. What is going on and how can I fix it? Thanx very much for any info... </pre> Rich Caloggero 2011-11-30T20:05:34 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4036 <pre>Hi I'm trying to understand how to change framerate in an ogg/theora file. I'm recording a stream from a chat (RTP/THEORA) but frame rate of recorded stream is not correct. Reading theora documentation it seems that frame rate (FRN and FRD) only affects granulepos/timestamp but changing it (manually) in the ogg files causes bad decoded frames while playing (I've also tried other ogg videos). Obviously I'm missing something, is there some way to change frame rate (I need to slow the playing of file) using ogg or oggz api? Thank you, Stefano _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Stefano Luceri 2011-08-25T11:57:25 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4032 <pre> I need some info on how can I read the audio data from an .ogv video. I'm creating an in-game player and so far I'm only able to read and render the frames of the video (no audio). Tried splitting the video from the sound but it got out of synch really quickly. Thanks, _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Nuno Moreira 2011-08-17T18:10:08 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4027 <pre>Hi, We are a online media company and are developing a new product that uses theora for video streaming. We used your free Visonair OGG streamer to test and it worked perfect . We would like to find out if your experts can help us complete our OGG streamer software. We are able to connect to icecast but the stream is unstable and buffers 90% of the time. We just need to get the streaming to the point where it is streaming smoothly with very little buffering . Regards Peter Lewis_______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> WCI Peter Lewis 2011-06-26T13:44:12 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4026 <pre>I'm having problems with doSeek. Unless the key frame interval in the video is 1 or 2, I cannot seek accurately to the place in the video I wish to go. The larger the interval, the greater the (random) error. However, these key frame intervals make the file unacceptably large. What can I do? Harry Keller _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Harry Keller 2011-07-17T19:29:59 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4025 <pre>Hi, I'm new to this mailing list. I'm trying to save a theora stream into an OGG file (or something else). I've the theora packets received from a VoIp application (over RTP). I'm able to convert a single frame to a jpeg image but I've no idea about how to write video file. Maybe this is not the right place to answer this question but I'm loosing my mind reading specs about file formats and conversion tools . any help appreciated. Thank you very much Stefano _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Stefano Luceri 2011-08-10T13:46:00 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4023 <pre>All, I've released a new libogg today. Version 1.3.0 includes Greg Maxwell's ogg_stream_flush_fill() call, which does the same thing as ogg_stream_flush() but allows the caller to specify the page spill threshold if pages outside the usual 4k target are desirable. This is used by the new opus tools to better control latency. The codebase is otherwise the same at the 1.2 series. We recommend this code for new deployments. Links: * http://downloads.xiph.org/releases/ogg/libogg-1.3.0.tar.xz * http://downloads.xiph.org/releases/ogg/libogg-1.3.0.tar.gz * http://downloads.xiph.org/releases/ogg/libogg-1.3.0.zip SHA-1 checksums: d74e7514f268d58a171b4b9baf15602fd8060c33 libogg-1.3.0.tar.xz a900af21b6d7db1c7aa74eb0c39589ed9db991b8 libogg-1.3.0.tar.gz 9615f8037e1cf462ab2fc4237c0ec2dc0ff77b8a libogg-1.3.0.zip Thanks everyone for your contributions, and let us know if you find any issues with this release. Cheers, -r </pre> Ralph Giles 2011-08-04T20:22:14 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4015 <pre>Hi All, I realise that this is the wrong sort of question for this mailing list. One of my UK customers is finding it difficult to find someone to implement video over IP using lwIP V1.3.2. If any one is interested or knows of someone that may be interested in this work then please contact me.mailto:ardware&lt; at &gt;gmail.com Cheers, Adam. _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Adam Fullerton 2011-07-31T17:00:43 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4014 <pre>ffmpeg2theora 0.28 - http://v2v.cc/~j/ffmpeg2theora/ Some changes that went into this release: - select resize method via commandline - fix 5.1 channel ordering - update to FFmpeg 0.7 branch - additional bug fixes Source: http://v2v.cc/~j/ffmpeg2theora/downloads/ffmpeg2theora-0.28.tar.bz2 svn co https://svn.xiph.org/tags/ffmpeg2theora/ffmpeg2theora-0.28  Binaries: Linux 32bit http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.28.linux32.bin Linux 64bit http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.28.linux64.bin Mac OS X http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.28.pkg Windows http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.28.exe _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> j< at >v2v.cc 2011-07-31T16:28:50 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4013 <pre>LinkedIn ------------ Joseph Miller requested to add you as a connection on LinkedIn: ------------------------------------------ Adrian, I'd like to add you to my professional network on LinkedIn. - Joseph Accept invitation from Joseph Miller http://www.linkedin.com/e/9cto2-gozkftmc-6r/XEG4O8UmODowffpdG3L8ya4B4e/blk/I119660718_15/1BpC5vrmRLoRZcjkkZt5YCpnlOt3RApnhMpmdzgmhxrSNBszYRclYUcjsMdzoVcj59bQ5WsQRLmmdobPcVc3ANdPoPczcLrCBxbOYWrSlI/EML_comm_afe/ View invitation from Joseph Miller http://www.linkedin.com/e/9cto2-gozkftmc-6r/XEG4O8UmODowffpdG3L8ya4B4e/blk/I119660718_15/3kNnPwNdP0SdzANckALqnpPbOYWrSlI/svi/ ------------------------------------------ DID YOU KNOW that LinkedIn can find the answers to your most difficult questions? Post those vexing questions on LinkedIn Answers to tap into the knowledge of the world's foremost business experts: http://www.linkedin.com/e/9cto2-gozkftmc-6r/ask/inv-23/ </pre> Joseph Miller via LinkedIn 2011-06-16T10:27:28 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4009 <pre>To my recollection, there hasn't been any talk about Ptalarbvorm. Is Ptalarbvorm development ditched? (I have noticed some commits for it every now and then, but nothing like the amount of commits last year) </pre> Daniel Hendrycks 2011-05-28T03:22:19 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4007 <pre>As far as my very limited knowledge goes the Theora video format is less complex than H.264 (High Profile for example). Please correct me if I am wrong. Does this also mean that I can expect that decoding a Theora stream is easier/faster to decode than a H.264 stream with comparable quality / or comparable bitrate? My (very practical) tests do show that it's easier for my computer to decode the same video as Theora than H.264 which stutters more easily. It would make sense that decoding something less complex is faster than something more complex. At least as long as no hardware video acceleration comes into play. Can someone confirm this or has someone perhaps verified this in the past? Regards, Franz </pre> fboehm 2011-05-18T06:38:04 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4002 <pre>Hi, is there a good concept to lower the quality of a Theora stream without completely reencoding it? For example to make a lower bitrate stream out of a higher bitrate stream on the fly on some sort of proxy server. I am thinking about something like requantization. If you think requantization is also the best (or the only) option for Theora please let me know. Kind regards, Franz </pre> fboehm 2011-05-17T22:08:46 http://comments.gmane.org/gmane.comp.multimedia.ogg.theora.general/4001 <pre>Hi,We are using Theora and gstreamer  for our group video chat product LuciTalk-MP (http://www.lucivid.com).  We are now trying to port LuciTalk-MP to Mac OS (Snow Leopard). The Theora-1.1  configuration strings across Linux  and Mac OS don't seem to be compatible while they work fine on the respective platforms. We get the following error from gstreamer (rtptheoradepay)- "Could not switch codebooks" Any insights into this problem will be very valuable. Thanks,Srini _______________________________________________ theora mailing list theora&lt; at &gt;xiph.org http://lists.xiph.org/mailman/listinfo/theora </pre> Srinivas Mandavilli 2011-04-22T07:21:08 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.comp.multimedia.ogg.theora.general