Thank you for responding, Michael. 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? Should I also be making
a call to avcodec_init? I am not doing that currently.
Actually, I will go ahead and try to post what I think is the relevant
code. This comes almost directly from the api_example found at this
URL:
http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/api-example_8c-source.html
----------------------------------------------------------------------------------------------
//These were declared globally
static uint8_t* pixbuf_data = NULL;
static vp_os_mutex_t video_update_lock = PTHREAD_MUTEX_INITIALIZER;
static AVCodec *codec;
static AVCodecContext *c= NULL;
int out_size, size, outbuf_size;
static FILE *f;
static AVFrame *picture;
static uint8_t *outbuf;
.
.
.
.
.
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_context();
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;
/* open it */
if (avcodec_open(c, codec) < 0) {
fprintf(stderr, "could not open codec\n");
exit(1);
}
---------------------------------------------------------------------------------------------------
Jeremy
On 04/09/2012 05:01 PM, Michael Bradshaw wrote:
On Mon, Apr 9, 2012 at 2:56 PM, Jeremy Graham <[email protected]
<mailto:[email protected]>> wrote:
Hello, everyone:
I just thought that I'd start out by asking a general question.
Can anyone tell me the possible reasons why avcodec_open might
generate a segementation fault?
Just out of curiosity, are you using avcodec_open or avcodec_open2?
avcodec_open is deprecated and should be avoided if possible.
--Michael
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