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While trying to convert wmv to animated gif using ffmpeg in Windows 7, I ran into an issue.
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\>ffmpeg -i test.wmv test.gif
ffmpeg version N-39877-g4fa706a Copyright (c) 2000-2012 the FFmpeg developers
built on Apr 16 2012 14:57:12 with gcc 4.6.3
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass
--enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable
-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libope
njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth
eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --e
nable-zlib
libavutil 51. 46.100 / 51. 46.100
libavcodec 54. 14.101 / 54. 14.101
libavformat 54. 3.100 / 54. 3.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 70.100 / 2. 70.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 11.100 / 0. 11.100
libpostproc 52. 0.100 / 52. 0.100
[asf @ 0000000001f3ead0] Could not find codec parameters (Video: none (MTS2 / 0x
3253544D), 800x400, 30000 kb/s)
test.wmv: could not find codec parameters
What does this mean and how can I solve it?
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Can you please download the latest static build for Windows from here and try again? Is there any way you could supply the original source file for us to download? Can you successfully convert other videos, e.g. with a different container like MP4 or MOV? Am I correct assuming these videos were created with Microsoft Expression Encoder?
– slhck – 2012-09-19T15:25:12.517Now it's working good. But it creates a very big animated gif. I need ffmpeg to compress it while it converts. What are the parameters should I use to reach it? – Oskar K. – 2012-09-19T16:15:46.070
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Depends on the dimension you want to scale. Do you want to keep the 800x400 size? If not, change it like
– slhck – 2012-09-19T17:22:32.800ffmpeg -i test.wmv … -s:v 400x200 out.gif
. Look at the answer you should have already seen for compression options: http://superuser.com/a/436109/48078