linux下，使用ffmpeg解码h264，出错，怎么解决？？？__include_outfilename_codec_avctx_frame_

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linux下，使用ffmpeg解码h264，出错，怎么解决？？？

来源: 互联网发布时间：2017-04-28

本文导语: #include #include #include #include #include #include #include #include #define INBUF_SIZE 4096 /* * Video decoding example */ static void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize, cha...

#include

#include
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#include
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#include

#define INBUF_SIZE 4096

/*
* Video decoding example
*/

static void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize,
                     char *filename)
{
    FILE *f;
    int i;

    f=fopen(filename,"ab+");
   // fprintf(f,"P5n%d %dn%dn",xsize,ysize,255);
    for(i=0;ilinesize[0],
                 avctx->width, avctx->height, outfilename);
        pgm_save(frame->data[1], frame->linesize[1],
                 avctx->width/2, avctx->height/2, outfilename);
        pgm_save(frame->data[2], frame->linesize[2],
                 avctx->width/2, avctx->height/2, outfilename);
        (*frame_count)++;
    }
    if (pkt->data) {
        pkt->size -= len;
        pkt->data += len;
    }
    return 0;
}

static void video_decode_example(const char *outfilename, const char *filename)
{
    AVCodec *codec;
    AVCodecContext *c= NULL;
    int frame_count;
    FILE *f;
    AVFrame *frame;
    uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
    AVPacket avpkt;

    av_init_packet(&avpkt);

    /* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
    memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);

    printf("Decode video file %s to %sn", filename, outfilename);

    /* find the mpeg1 video decoder */
    codec = avcodec_find_decoder(AV_CODEC_ID_H264);
    if (!codec) {
        fprintf(stderr, "Codec not foundn");
        exit(1);
    }

    c = avcodec_alloc_context3(codec);
    if (!c) {
        fprintf(stderr, "Could not allocate video codec contextn");
        exit(1);
    }

    if(codec->capabilities&CODEC_CAP_TRUNCATED)
        c->flags|= CODEC_FLAG_TRUNCATED; /* we do not send complete frames */

    /* For some codecs, such as msmpeg4 and mpeg4, width and height
       MUST be initialized there because this information is not
       available in the bitstream. */

    /* open it */
    if (avcodec_open2(c, codec, NULL)  0)
            if (decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 0)