int mpeg4video_parse_init(AVCodecParserContext *s)
static int mpeg4video_parse_init(AVCodecParserContext *s)
int mpeg4video_parse_init(AVCodecParserContext *s){    ParseContext1 *pc = s->priv_data;    pc->enc = av_mallocz(sizeof(MpegEncContext));    if (!pc->enc)        return -1;    pc->first_picture = 1;    return 0;}