search for: interframe

...this has already been rehashed before. There seems to be something very odd about how the PP_INSTANCE::PrevFragments array is handled during keyframes. I'm not a video codec expert so I'm not entirely sure what the reason for keeping a history of blocks updated in the last few previous interframes and adding them to the blocks to be updated in the current interframe is, but I'm sure there's a good one (perhaps it's to further refine the updated fragments). However, the way keyframes are handled in this history seems very counter-intuitive to me. When PrevFragments is initia...

...ppose TAP MTU = 1500-8(UDP)-20(IP)-18(Ethernet) = 1454. So I'd set 1454 for tap device: "ip link set mtu 1454 dev eth0" I'm not shure about what is the exact size of ethernet frame header, which tap device use in switch mode? Is there FCS field? - Sure it should be. But is there InterFrame Space and Preamble in the "switch environment"? And how this correlate with PMTU and PMTUDiscovery options? Should I really manually change MTU for tap device? I very appreciate your help. Thanks!

At 17:05 8/11/2001 -0400, you wrote: >you tell me. Works alright here, except in xmms which has a bug in its >shoutcast metadata handler. I've submitted a patch at bugs.xmms.org >for it. Hmm.. well with the current version of winamp and the previous two it would and does skip if I have metadata enabled.. it'll start anywhere from ten minutes to an hour into the stream and then

...nted in libavcodec). I see that most of the code cribs the original VP3 source code, including the misspelled comments. Moving right along, I can't reconcile the way bits are packed in the stream. In VP3, the first byte of an encoded frame is supposed to contain: bit 7: 0 = golden frame, 1 = interframe bit 6: unused bits 5-0: Quality index (0..63) According to {theora}/lib/decode.c, it goes frame type (1 bit), Q index (6 bits), then spare bit (1 bit). With some strategically-placed printf()'s, I'm seeing data like this: hey! Theora packet has 9 bytes first 8 bytes: 32 00 0B D7 6...

Hello, I have some code that encodes PCM data into a vorbis stream, using the workflow shown in http://www.xiph.org/vorbis/doc/libvorbis/overview.html. By analyzing that process with valgrind/cachegrind I found out that 95% of the time used for encoding is spent in the function "vorbis_analysis(&vb, 0)". My question now is: would it be technically possible to parallelize this? I

??????? I've rewritten my theora player using liboggz. I've stumbled upon a few issues though. First of all liboggz exposes oggz_read and oggz_run, but how can i read only sound data, or only video data using liboggz, say something like this: oggz_read_sound(1024), oggz_read_video(1024). ? ? ? ?? Second of all i tried using liboggz's seek function. Immediately after the seek i get some

...pdateFrame() out of the (MotionScore > 0) conditional block. I've also included my change that prevents the encoder from spending WAY to many bits on keyframes. This helps prevent the artifact where the video suddenly gets very clear when keyframes occur but gets progressively blurry for interframes. This change helps minimize some of the drastic Q changes that cause this artifact. Aaron Index: encoder_toplevel.c =================================================================== --- encoder_toplevel.c (revision 9007) +++ encoder_toplevel.c (working copy) @@ -739,12 +739,12 @@ /* Incre...

...the beginning of their > >> data? > > > >probably not, but nothing would read it. > > How do you figure? ID3s are supposed to be the last 128 bytes of the file. So I would expect most MP3 players just jump to the end of the file and grab the ID3, rather than parsing any interframe garbage they run across to see if it might be an ID3 tag. Streams of course have no end of file. I haven't actually tried to embed ID3 tags between frames in a stream - you are welcome to prove me wrong. > >> I don't see any reason to send it at a particular interval, just >...

I hope this list is small enough for not beeing banned when introducing oneself. So... Hi, I just subscribed to the theora-lists. I'm from the XVID project, so I know a deal about video and MPEG-4 in particular, but nothing about Vorbis/Theora etc., That's why I'm here, because I'm interested in patent-free alternatives. I guess there is no documentation of the current status

Im using a Linux machine with standard pc hardware with 3 seperate PCI network interfaces to operate as a DiffServ core router using Linux traffic control. The machine is a P4 2.8ghz, 512mb RAM running fedora core 3 with the 2.6.12.3 kernel. All links and network interfaces are full duplex fast ethernet. IP forwarding is enabled in the kernel. All hosts on the network have their time sychronised