[FFmpeg-devel] Enable two-pass encoding programatically

Mikael Hakman mhakman
Sat Dec 15 19:51:04 CET 2007


I asked this question on [FFmpeg-user] list but did not receive any answers. 
Well, I'll try here.

How do I enable two-pass encoding/rate control when using 
libavformat/libavcodec programmatically? I'm setting pass1 flag by:

   videoStream->codec->flags |= CODEC_FLAG_PASS1;

but  the stats at:


are 0 in length all the time during the run. Do I have to set some other 
fields somewhere?


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