[Libav-user] avcodec_open seg fault?

[Jeremy Graham]

I changed the code to this and it still produces a seg fault.  I changed 
the avcodec_alloc_context and avcodec_open calls to the new versions of 
the functions as well.  This is so strange to me.

   av_register_all();
   /* find the mpeg1 video encoder */
      codec = avcodec_find_encoder(CODEC_ID_MPEG1VIDEO);
      if (!codec) {
          fprintf(stderr, "codec not found\n");
          exit(1);
      }

      c= avcodec_alloc_context3(codec);
      picture= avcodec_alloc_frame();

      /* put sample parameters */
      c->bit_rate = 400000;
      /* resolution must be a multiple of two */
      c->width = 352;
      c->height = 288;
      /* frames per second */
      c->time_base= (AVRational){1,25};
      c->gop_size = 10; /* emit one intra frame every ten frames */
      c->max_b_frames=1;
      c->pix_fmt = PIX_FMT_YUV420P;
      c->codec_id   = codec->id;
      c->codec_type = AVMEDIA_TYPE_VIDEO ;

      /* open it */
      if (avcodec_open2(c, codec,NULL) < 0) {
          fprintf(stderr, "could not open codec\n");
          exit(1);
      }


On 04/09/2012 09:34 PM, Kalileo wrote:
> On Apr 10, 2012, at 04:11 , Jeremy Graham wrote:
>
>> I did try using avcodec_open2 as well but I still got a seg fault out of it. I set the third parameter to NULL, however.  Is that what I am doing wrong?
> No, NULL is ok there.
>
> Try setting these 2 values before you open the codec:
>
> c->codec_id   = codec->id;
> c->codec_type = AVMEDIA_TYPE_VIDEO ;
>
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