similar to: Bad memory access in libtheora beta3

Hi, I sent the message below a couple of months ago but I got no reply. Now that there's more activity perhaps someone could kindly provide me some guidance. Theora is great and the developers are doing a wonderful job, so I'd like to implement the codec in a way which does it justice... Original post: I wrote a plugin to enable LiVES (a video editor) to encode theora/vorbis/ogg files.

https://roundup.ffmpeg.org/roundup/ffmpeg/issue1197 I had originally encountered this problem using ffmpeg2theora. I switched to ffmpeg proper in an attempt to identify where the problem was at, and found that the problem persisted. As a result I had thought this was a problem with ffmpeg, but the ffmpeg folks seem to indicate that this is specific to Theora (too much finger pointing I think.) I

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

Hello, hope you can help me. I want to encode a video, which I have exported from Keynote (a program for presentation like MS Power Point) using ffmpeg2theora for html5 web delivery. The result only plays very buggy - frames are dropped, the video hangs and vlc can not output the correct length of the ogv video. Here is the source and the result for download, if you want to reproduce it: the

this sample is very blocky, the older version seems to do much better and less blocky video. i'm not sure if my 1.9ghz 1 gb ram is the problem here or the encoder has hicups on this new libtheora 1.1 20090806 (Thusnelda). please advice how to fix this or should i use the older version. this encode was 2 pass with horrible output. http://www.megaupload.com/?d=NDGY0EAL General ID

Has anyone noticed this? I have a video made with Final Cut Pro, which I convert to .mov via Compressor. This .mov file plays back fine in Quicktime. But when I then use ffmpeg2theora to convert to ogv, the video seems to play back too fast compared to the audio (I'm using VLC 1.0.2, the latest I believe, to play back the ogv file, and I also have an app that uses the recently

Hi, I'm new here - thanks for having me. (Sorry if I'm in the wrong place or a noob.) I downloaded the Theora encoder sample (ver 1.1.1), modified it to encode a sequence of bitmaps, and created an OGV file. The OGV file plays fine in the latest VLC (1.0.5), but I can't do much else with it: I tried uploading to YouTube, and the video just comes out really corrupt:

hi, there is a problem when i convert some mpeg files to ogv with libthusnelda I 20090527... i don't know it this helps you but i am sending information about it... when i convert an mpeg file ro ogv, there are macro block artifacts on the lower part of the video... but it doesn't happen all the time... description is below and you can download the video files form the link below if you

1. "dump_video.c" got reverted back by 5 years into 2004: https://trac.xiph.org/browser/trunk/theora/examples/dump_video.c https://trac.xiph.org/log/trunk/theora/examples/dump_video.c 2. "png2theora.c" (subminor) https://trac.xiph.org/browser/trunk/theora/examples/png2theora.c 207 /* Must hold: yuv_w >= w */ 208 yuv_w = (w + 15) & ~15; 209 210 /* Must hold:

After a bunch of cumbersome testing I was able to transcode a Quicktime MOV file to OGG with theora and Vorbis. The method's a bit fumbly, but it works... It is automatable except for the initial audio decoding. Software used: Xine, oggenc, ffmpeg, ffmpeg2theora, oggzmerge Step 1: Get the video out of Quicktime ffmpeg -i infile.mov -b 5000 -f mpeg2video outfile.mpg Step 2: Get the video

hi yorn and all, thank you oggvideo tools for windows. it is great... i can live with the command line for now myself but i will need to make some art students work with oggvideotools and they may not be happy with that:D anyway your video tutorial is also good (but it also crashed my firefox 3.5 beta 4 for two times on windows and i have reported that to mozilla), i would love to help for that

hello. as many times before i ran into troubles to encode with ffmpeg2theora from a 3gp file. the example files are here: original: http://startx.plentyfact.org/media/theorastuff/test.3gp ffmpeg2theora: http://startx.plentyfact.org/media/theorastuff/test.ogv the 3gp file ( from some phone ) is Video: mpeg4, yuv420p, 800x480 [PAR 1:1 DAR 5:3], 2962 kb/s, 23.95 fps, 60 tbr, 1k

I tested the new FFMPEG2THEORA 0.26 and some players. 1. Biggest bug: http://freefile.kristopherw.us/uploads/temp/push5tru.zi7 encodes into http://freefile.kristopherw.us/uploads/temp/push5tru.ogv the problem: it doesn't play well. MPLAYER reacts very badly, reports "invalid frames" and HANGS (known issue ???). But in VLC there is also a problem, less severe:

Hello, Could you kindly point me to some instruction, how to encode demuxed files (.m2v and .mp2) to .ogg (Theora + Vorbis)? I was trying to use ffmpeg2theora, but I don't know, how to put two files to ffmpeg2theora (one audio an one video) and did not found, how to mux them into one file? Exist a way, how to do two pass encoding? I'm using Ubuntu Fiesty Linux. Thank you, Jiri Navratil

Hi J., We are using ffmpeg2theora to produce an introduction video from a series of images: ffmpeg2theora-0.26.linux32.bin images/img-%03d.png -o intro.ogv The video that we get is huge and horrible, with lots of blinking colors: http://free-electrons.com/issues/ffmpeg2theora-mar5-2010/intro.ogv Here's what we had in the past:

hi all, i have been trying to export some videos using firefogg in two pass mode. the problem i get recently with various files is that when i choose a low bitrate (for example 1200kbps for a 512x224 25fps video with so many details) the video quality is very very good at the beginning (much better then my quality based -v 5 export which produces a 1204kbps video with the same build) and then

Hi Beorn, 1. replace "-v 7" to "--optimize --two-pass --soft-target -V 2000" you will get about 200MB file size with no changes in quality. 2. try to use libtheora ptalarbvorm, it is in alpha state but has some improvements. You can find comparison here: http://people.xiph.org/~xiphmont/demo/theora/demo9.html if you use ubuntu 10.10 you can download precompiled libtheora and

So to which group should I foward my question? I thought this was the most appropriate of them all. Please guide me On Thu, Dec 10, 2009 at 8:59 PM, Monty Montgomery <monty at xiph.org> wrote: > I have the impression only a small piece of this conversation is being > forwarded to ogg-dev. We can't answer questions when we have no idea > what's going on :-) > >

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