[Libav-user] 转发: ask for help

勃 王 wb4701 at yahoo.com.cn
Wed Jul 6 02:58:26 CEST 2011

 Hello, I'm a new user of FFMPEG. It's
 a such strong program. When I use it, I meet a problem. I
 want to create a file with H264(video encoder) and MP3(audio
 encoder) using C language. I made use of part of code in
 output_example, but it didn't work. The file created only
 had video iformation without audio information. I think
 there must be some problem here. 
 AVOutputFormat *fmt=guess_format ("h264", NULL, NULL); 
 AVFormatContext pFormatCtx=av_alloc_format_contex(); 
 pFormatCtx-> oformat = fmt; 
 Could you help me solve this problem? Thanks a lot!

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