[Libav-user] Grabbing desktop at a framerate of 25 fps

[Taha Ansari]

A quick look at your code, you are opening up the encoder each time you
write to disk:

png_encoder_codec = avcodec_find_encoder_by_name ("png");

Do it just once, like at startup time, and use encoding routines on this
png_encoder_codec later.

Hope this helps
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