[FFmpeg-user] [help]libx264 and mp3

[wb4701]

Hi, everyone. I'm a new user of FFMPEG. It's a so strong program. When I use
it, I meet an 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
out_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); 
fmt->audio_codec=CODEC_ID_MP3;
AVFormatContext pFormatCtx=av_alloc_format_contex();
pFormatCtx-> oformat = fmt; 

Could anybody help me solve this problem? Thanks a lot!

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