similar to: How to do Theora playback efficiently ?

Hi Ralph, thanks for your posting. Yes, the standard example player in the theora distribution could also do it when theora would not need so much time. I removed the frame dropping from the example because it's based on some audio stuff under Linux that isn't available on Windows. Currently I've no frame dropping handling build in because the first goal is a good raw performance of

Hi all, I'm mixing logical streams at the page level. One stream has vorbis data, the other has my own data. Do I need two ogg_sync_states or just one? Thanks, Martin --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word

Hi,Olaf, I have some questions about event channel in Xenpaging to ask you. 1) In xenpaging it uses Inter-Domainain Commnication (IDC) between dom0 and domU to build bidirectional connection,but I found there is only an event channel notification from xen to dom0 when page faults happens.It seems that xenpaging_resume_page()->xc_evtchn_notify() doesn''t make any difference.So why

I guess I'm missing something since the following minimized test case is failing: >>> #include "ogg/ogg.h" main() { ogg_sync_state the_ogg_sync_state; ogg_sync_init(&the_ogg_sync_state); ogg_sync_destroy( &the_ogg_sync_state ); } >>> $ gcc -g -logg test.c $ ./a.out *** glibc detected *** ./a.out: munmap_chunk(): invalid pointer:

hi all: i downloaded libtheora1.0.tar.gz from xiph.org, and when i compile it, such error message popped. i tried to run player_example.c under /libtheora_1.0/examples/. error message: ivysummer at ivysummer-desktop:~/??/libtheora-1.0/examples$ gcc -o player player_example.c /tmp/ccpyle3c.o: In function `buffer_data': player_example.c:(.text+0x15): undefined reference to

Hopefullly this is once again something trivial I'm missing. I'm still trying to figure out how to pull a part a stream. I get two out the three theora headers I can see in the file (http://v2v.cc/~j/theora_testsuite/320x240.ogg) if I use the buffer in the page struct and nothing usable if I try to use the packet structs. Hopefully this is once again something something trivial I've

I tried encoding http://home.tange.dk/theora/stream.dump with http://home.tange.dk/theora/optag-dvd 4. From that I got http://home.tange.dk/theora/dvd-4.theora.ogg. mplayer stream.dump works fine, but when playing the theora encoded file on my 2 GHz computer both mplayer and xine take 85% of my CPU while X takes the remaining 15% (i.e. 0% idle time) and the playback is no way near smooth. Using:

Hello, currently I'm working on a vorbis based encoder that adds multiple single wave sounds into one vorbis stream (and put every sound in one or more ogg pages). During the process an index is written in an extra file so later you can locate a sound's position easily by a file position and length value. The problem is the sample-exact separation between those encoded wave sounds: If I

Hi, I am actually working on a c++ wrapper for ogg/theora. It will be a small library to easily create command line tools to cut/cat video-files and to extract and join the video and audio stream etc. However, I started the project and found some very strange behaviors: I stored some ogg_packet objects (which are created on the heap) in a list. When I make several calls to ogg_stream_pagein()

1.) after initializing a ogg_stream_state may I just keep calling ogg_stream_packetin with valid ogg_packet's until no more ogg_packets needs to be added? Or do I need to call ogg_stream_pageout after every ogg_stream_packetin? Iaw may I delay calling ogg_stream_pageout until there are no more packets to be added? 2.) I assume I have call ogg_stream_pageout until no more pages can be

Hey all, If my understanding is right, there's a serious big in vorbisfile.c, in the routine _fetch_headers(), which will only show up when comment packet spans multiple pages. The code to read the first 3 Vorbis packets ogg_stream_pagein() once, then calls ogg_stream_packetout(). The problem is that ogg_stream_pagein() only adds a single page to the ogg stream state, whereas

It seems to me that running ogg_sync_pageout doesn't automatically advance the page. This is good if you haven't worked with the given page, makes coding somewhat easier. However, when does a page advance. Is it after a call to ogg_stream_pagein? On a side note, I need to do seeking on top of libvorbis, I'd love to use vorbisfile but sadly I can't. Is there a reasonable way to

Ok, related to the replys from Eric and Monty there are 3 possible solutions - 1. use lossless encoding like FLAC - 2. insert large chunks of silence between the wave sounds - 3. use completely seperate chained streams -> 1. Flac can't be used because of disk space and bandwidth limitations. -> 2. I also tried this variant but in that case my sounds don't start immediately

Hello Conrad, I'm trying to seek the way you told but I'm facing a problem. ogg_page_packets returns 164 and following code returns 189. Shouldn't it be the same, what does that means ? int res; while (true) { res = ogg_stream_packetout(&os, &op); if (res == 1) nPackets++; if (res == -1)

Hi there again.. I'm still writing my particular-case-vorbis-encoder-and-player, and it worked fine until now. I'm having a problem trying to encoding the audio. I need to send the data very quickly, as soon as i capture it from the sound card. Currently i have the following (audio captured 16 bits, mono): void VorbisEncoder::encode(void *data, int r) { char *buf = (char *)

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. You can see this in code

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. You can see this in code

Hello, > (1) Split the content into chain segments > (2) extract the first and last data packet from each segment, for all tracks > (3) recover / calculate the granulepos values for the first and last data packets (*) > (4) convert the granulepos values from the first and last data packets into time values > (5) take the largest difference between start and end time as the total

Hello, I'm new to this list, and pretty much also to the codec universe. In a computer game I'm working on, there is an 3D TV-screen onto which I project the frames of a movie. The movie is of course stored as theora, no audio as it's not needed yet. I have it working so far, extracting a frame and uploading it to the graphics card when the scene is drawn. The example file

Hello all Can anyone point me to some form of description for the fields in the following structures : 1/ vorbis_dsp_state 2/ vorbis_block Thank you. regards ~previr _____________________________________________________________ Previr Rangroo STMicroelectronics Associate Systems Lab Engineer Plot No. 2 & 3, Audio Competence Center Sector 16A,