[FFmpeg-user] iphone auto-rotation?

[Mark Hahn]

I run a service that publishes videos.  Amazon does the actual conversion
to h264 but I'm using ffmpeg to capture frames to make thumbnails.  I have
a problem now where iPhone 4 videos have a weird rotation that amazon
handles properly but ffmpeg is ignoring.  So i'm getting rotated thumbnails.

I checked the file with mediainfo and the metadata says there is a 90
degree rotation.  What can I do to get ffmpeg to auto-rotate using this
information?

My version info is ...

> ffmpeg -version

ffmpeg version git-2013-01-17-b454c64
built on Jan 17 2013 05:46:15 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration: --enable-gpl --enable-libass --enable-libfaac
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx
--enable-libx264 --enable-nonfree --enable-version3

libavutil          52. 15.100 / 52. 15.100
libavcodec     54. 89.100 / 54. 89.100
libavformat    54. 60.101 / 54. 60.101
libavdevice    54.  3.102 / 54.  3.102
libavfilter          3. 32.100 /  3. 32.100
libswscale         2.  1.103 /  2.  1.103
libswresample   0. 17.102 /  0. 17.102
libpostproc      52.  2.100 / 52.  2.100

Any help would be greatly appreciated ...