similar to: Bitrate expectations for encoding or decoding

Hi everybody, me again. I'm trying to write my own VFW-like dll... It doesn't need to do much. 1.) compress a single frame and give it back to the host application 2.) host applications sends the frame 3.) client application receives frame 4.) client application tells the dll to decompress the data So if I try to do this, something is going wrong... Perhaps someone could have a look at my

Hello, I'm not sure if this list is the proper place for this post; please correct me if it is not. I am attempting to use libtheora and I have been looking through the examples in the distribution Excerpt from encoder_example.c -- case 'V': video_r=rint(atof(optarg)*1000); if(video_r<45000 || video_r>2000000) { fprintf(stderr,"Illegal

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.

I've got my encoder working now... and i put a proeprty page interface to allow the user to set a few encoding paramters to start off with... but changing the paramters doesn't seem to make barely any difference... These are the defaults i'm using... mTheoraInfo.target_bitrate=400000; mTheoraInfo.quality=30; mTheoraInfo.dropframes_p=0; mTheoraInfo.quick_p=1;

Hi all. I would really like to use Theora for the commercial product I work on... It's a Linux based DVR. Actually we use ffmpeg to produce MPeg4 short clips from 4 BNC channels in CIF resolution. I made a small module for our project that uses Theora... but I see that it gets a lot of CPU :( So I'm here to ask for any kind tips to reduce the CPU usage. - Hardware... do you think there

Michael, > I had a bug report that it was crashing though - I haven't looked into it > yet. Might be only with mis-configured setups. > > Just specify (instead of <quality>3</quality>), any of: > <nominal-bitrate>value in bits per seconds</nominal-bitrate> > <maximum-bitrate>val</maximum-bitrate> >

At 06:34 PM 7/29/02 +1000, you wrote: >I have got ices running with quality -1 (and on my roommates crappy computer >speakers it sounds damn near the real thing - better than FM radio anyway)... > >I'm just wondering if it's posible to configure it with a maximum bitrate, or >a nominal bitrate. i.e. to use managed bitrates instead of quality (I know >it's a no no,

At 06:29 PM 7/29/02 -0400, you wrote: >Michael, > >> I had a bug report that it was crashing though - I haven't looked into it >> yet. Might be only with mis-configured setups. >> >> Just specify (instead of <quality>3</quality>), any of: >> <nominal-bitrate>value in bits per seconds</nominal-bitrate> >>

Hi all. In my test application I saw that the encoding process with Theora is too CPU expensive ( compared to FFmpeg - MP4 ) ... Perhaps I'm using wrong parameters: ti.fps_numerator = fps * 11 + 1; // var framerate ti.fps_denominator = 11; ti.aspect_numerator = 1; ti.aspect_denominator = 1; ti.colorspace = OC_CS_ITU_REC_470BG; //

I am trying to write a sample app that uses Theora for encoding/decoding a network video stream. Unfortunately, I keep running into this error: Run-Time Check Failure #3 - The variable 'MVect' is being used without being defined. It always happens on decryption, line 467 in decode.c. The issue is that CodingMethod is equal to 5 (CODE_GOLDENFRAME), which doesn't initialize the

Unity3D seems to be working in wine fairly well, despite a few non-critical problems. One such problem is that when a .blend is imported, Unity complains with "Blender could not be found" and instructs me to "Make sure that Blender is installed and the .blend file has Blender as its 'Open with' application!" I installed the windows version of Blender in wine (first

Hi! Some background: I am trying to create an application that would encode video taken by USB camera using Theora and then send it to the client. I have almost succeeded, but I have one problem. When I grab video frames from the camera and encode them they form 4KB OGG pages, then I send them over TCP/IP to the client application. Since I want to achieve as small latency as possible I

In testing, I have found that both MP3 and RealAudio 3(!) are much better sounding at bitrates from 8 to 40-something kbps than Ogg Vorbis. This definatly needs drastic improvents and I know that 1.1 will be focusing on improvements in those areas but that seems pretty far off(a few months minimum) which leaves low-bitrate streams sounding pretty bad. --- >8 ---- List archives:

Hi, all. I'm new to this list, and I know that my question touches on a FAQ. I'm just hoping to get more information than "it's a priority item, but it's not done yet." (Basically what the FAQ says.) I've been encoding about 20 minutes of mono audio each week to as small a file as I can, so it can be served via html. As long as the result is understandable,

I have got ices running with quality -1 (and on my roommates crappy computer speakers it sounds damn near the real thing - better than FM radio anyway)... I'm just wondering if it's posible to configure it with a maximum bitrate, or a nominal bitrate. i.e. to use managed bitrates instead of quality (I know it's a no no, but this is streaming!). Mark <p>--- >8 ---- List

Hi, i know this mailing list is basically dead but i try anyways because i've got a problem and i'm nearly desperate. I'm writing a realtime voice chat application, with a centralized server (dedicated) architecture, using C# (dedicated server is a .net core app while for the client i'm using C# to script the game engine Unity3D). For the encoding/decoding part i'm using

I've just done some rudimentary testing to see how Vorbis degrades at absurdly low bitrates without downsampling. In summary, don't hope for anything decent below -q 0 for now. I tried oggenc -b <bitrate> -M <bitrate> for the below and a few in between: 24k - spectral energy "floor" captured decently, but many pure-tone blips (think old computer movie sound effects)

Hello, Today I was benchmarking DV video on a AMD64: skinkie@zwartepiet ~ $ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 47 model name : AMD Athlon(tm) 64 Processor 3500+ stepping : 0 cpu MHz : 2210.197 cache size : 512 KB fpu : yes fpu_exception : yes cpuid level : 1 wp : yes

Hi, I'm doing a VoIP related project where at some point i need to decode speex data gathered from a flash client, and then encode it to ulaw or alaw pcm so i can send it in rtp packets. On the other way, i get rtp packets with ulaw and alaw pcm data, then i need to decode them to linear pcm and feed the speex encoder, so i can send the data to the flash player. I'm using JSpeex, i know

This patch adds a static bitrate allocation for ambisonics encoded with the multistream API. We allocate 4 bits to the mono channel (channel index 0) for every 3 bits allocated to other channels. The allocation is static because it does not depend on the input audio. This patch also forces the underlying encoders to use CELT only for ambisonics. -- Thanks, Michael Graczyk -------------- next