[theora] Bad results, encoding keynote presentation videos
gabriel_teixeira at sdesigns.eu
Wed Aug 11 08:53:11 PDT 2010
On 11/08/2010 16:54, Michael wrote:
> 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 source, which plays smooth:
> my result:
> I am using:
> ffmpeg2theora 0.27 - Xiph.Org libtheora 1.1 20090822 (Thusnelda)
> Here is the output of ffmpeg2theora:
> $ ffmpeg2theora /Users/michi/Desktop/test_vid01.mp4
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/michael/Desktop/test_vid01.mp4':
> major_brand : isom
> minor_version : 512
> compatible_brands: isomiso2avc1mp41
> encoder : Lavf52.78.1
> Duration: 00:00:23.96, start: 0.000000, bitrate: 245 kb/s
> Stream #0.0(eng): Video: h264, yuv420p, 640x360, 241 kb/s, 25.04
> fps, 25 tbr, 600 tbn, 1200 tbc
> 0:00:24.00 audio: 0kbps video: 151kbps, time elapsed: 00:00:19
> 0:00:23.96 audio: 0kbps video: 151kbps, time elapsed: 00:00:19
> Perhaps you have an ideam what's going on here..
> Thanks in advance, Michael.
> theora mailing list
> theora at xiph.org
This video plays nice for me on Mozilla Firefox 3.6.8 and on Totem
2.30.2 on Ubuntu Linux 10.04 x64 although VLC 1.0.6 has difficulties to
control the time of play. I think the problem is in the VLC which
sometimes doesn't play my ogg videos correctly. Try other player and
tell the results.
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