[theora] ffmpeg2theora: issue converting from a png image list

Michael Opdenacker michael at free-electrons.com
Wed Jul 15 14:24:03 PDT 2009


Hi Jan, all

I am trying to generate a video introduction with a fade-in / fade-out
effect. To do this with ffmpeg2theora only, I generated a list of PNG
images: img001.png, img002.png... img299.png

The ffmpeg2theora man page says:

Encode a series of images:
         ffmpeg2theora frame%06d.png -o output.ogv

That's exactly what I tried with the latest 0.24 release of ffmpeg2theora:

ffmpeg2theora-0.24.linux32.bin img-%03d.png -o output.ogv
Input #0, image2, from 'img-%03d.png':
  Duration: 00:00:12.00, start: 0.000000, bitrate: N/A
    Stream #0.0: Video: png, yuv420p, 1280x720, 25 tbr, 25 tbn, 25 tbc
  Resize: 1280x720
Segmentation fault

The same problem happens with the release in Ubuntu 9.04, and with the
0.22 release. I haven't tried earlier releases yet.

To reproduce this issue, you can get the images from the tarball on
http://free-electrons.com/issues/ffmpeg2theora-jul15-2009/

I would like to avoid using mencoder + ffmpeg2theora to do the job
(unless I manage to generate the theora video directly from mencoder).

I hope this helps to fix this issue... Don't hesitate to get back to me
if you have any question.

Cheers,

Michael.

-- 
Michael Opdenacker, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com
+ 33 621 604 642



More information about the theora mailing list