Comments on: FOMS 2009: video introductions available

By: Mark H Weaver

Mark H Weaver — Wed, 27 May 2009 16:15:54 +0000

Thanks for making these videos available in a free format, and for your work on Ogg!

By: silvia

silvia — Wed, 27 May 2009 10:44:22 +0000

OK, they should all be updated now. Let me know if there are any more issues. And … thanks for being persistent.

By: Mark H Weaver

Mark H Weaver — Tue, 26 May 2009 03:15:43 +0000

The new video of Chaals looks great, all problems solved!

By: silvia

silvia — Tue, 26 May 2009 00:47:56 +0000

The input is dv.I even used the “–sync” parameter, but it seems that was the one screwing it up. It worked fine for my original test material and the sync is drifting, so the files are fine at the beginning (which is what I tested). I now have re-encoded the same video again – give it another shot. If ok, I will re-do the rest.

By: Mark H Weaver

Mark H Weaver — Mon, 25 May 2009 16:32:30 +0000

I sorry to report that the Thusnelda-based video of Chaals has the same problems: audio/video is way out of sync, and the video ends in the middle of a sentence. Also, I tried several different video players on Debian lenny, based on different libraries, and all showed the same problems: MPlayer, VLC, Totem-xine, and Totem-gstreamer. What video format are you feeding into ffmpeg2theora? I’ve noticed A/V sync problems with certain source formats when using ffmpeg2theora. What video player(s) have you tried, that don’t show these problems?

By: silvia

silvia — Mon, 25 May 2009 14:24:33 +0000

Mark, I just re-encoded one of the videos with the new thusnelda-based ffmpeg2theora. Can you check if you have problems with http://www.foms-workshop.org/foms2009/pmwiki.php/Main/Chaals ? Thanks.

By: Mark H Weaver

Mark H Weaver — Wed, 20 May 2009 04:16:41 +0000

A Thusnelda-based version of ffmpeg2theora for the Mac can be downloaded from:

http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.24-thusnelda.pkg.zip

By: silvia

silvia — Tue, 19 May 2009 23:29:03 +0000

I gave a very slack reply – I did actually use ffmpeg2theora for encoding. But I used an old-ish version on the Mac. I’m still wondering about feedback from others before I go and spend another weekend on re-transcoding.

By: Mark H Weaver

Mark H Weaver — Tue, 19 May 2009 18:29:14 +0000

I’m using MPlayer on Debian GNU/Linux 5.0 (lenny). I recommend using ffmpeg2theora, which uses ffmpeg to decode the original file, but uses libtheora and libvorbis for the encoding. Although ffmpeg is capable of encoding Theora, it is known to do a very poor job.

By: silvia

silvia — Tue, 19 May 2009 00:31:33 +0000

That would have been ffmpeg on my Mac. Seeing as Thusnelda is out, mabye I should install the latest codebase of that and re-encode them.

Incidentally, I have no issues watching these videos. What platform are you watching them on? Do others have issues, too?