[Libav-user] get RGB values from ffmpeg frame

Carl Eugen Hoyos cehoyos at ag.or.at
Wed Nov 21 12:47:42 CET 2012

Navin <nkipe at ...> writes:

> Am using the latest ffmpeg-win32-dev and I've tried with a wmv, many mp4 
> (from youtube, h264 (high) (avc1/0x31637661), yuv420p 1280x720, 
> 1139kb/s, 24fps) files and avi too, but they're all crashing with 
> Unhandled exception, Access violation writing location 0x002a3000 at the 
> line "sws_scale".

Did you look at doc/examples/scaling_video.c?
Because I don't see the call to av_image_alloc() in your code...

Partly related:
If you are really interested in working with FFmpeg libraries, 
instead of downloading pre-compiled libraries, you should either 
install msys and mingw (which provide a debugger that would 
have helped you) or compile FFmpeg with msvc.

Carl Eugen

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