static int read_header(AVFormatContext *s1) { VideoDemuxData *s = s1->priv_data; int first_index, last_index, ret = 0; int width = 0, height = 0; AVStream *st; enum PixelFormat pix_fmt = PIX_FMT_NONE; AVRational framerate; s1->ctx_flags |= AVFMTCTX_NOHEADER; st = avformat_new_stream(s1, NULL); if (!st) { return AVERROR(ENOMEM); } if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) { av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format); return AVERROR(EINVAL); } if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) { av_log(s, AV_LOG_ERROR, "Could not parse video size: %s.\n", s->video_size); return ret; } if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) { av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate); return ret; } av_strlcpy(s->path, s1->filename, sizeof(s->path)); s->img_number = 0; s->img_count = 0; /* find format */ if (s1->iformat->flags & AVFMT_NOFILE) s->is_pipe = 0; else{ s->is_pipe = 1; st->need_parsing = AVSTREAM_PARSE_FULL; } avpriv_set_pts_info(st, 60, framerate.den, framerate.num); if (width && height) { st->codec->width = width; st->codec->height = height; } if (!s->is_pipe) { s->use_glob = is_glob(s->path); if (s->use_glob) { #if HAVE_GLOB char *p = s->path, *q, *dup; int gerr; dup = q = av_strdup(p); while (*q) { /* Do we have room for the next char and a \ insertion? */ if ((p - s->path) >= (sizeof(s->path) - 2)) break; if (*q == '%' && strspn(q + 1, "%*?[]{}")) ++q; else if (strspn(q, "\\*?[]{}")) *p++ = '\\'; *p++ = *q++; } *p = 0; av_free(dup); gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate); if (gerr != 0) { return AVERROR(ENOENT); } first_index = 0; last_index = s->globstate.gl_pathc - 1; #endif } else { if (find_image_range(&first_index, &last_index, s->path, s->start_number, s->start_number_range) < 0) { av_log(s1, AV_LOG_ERROR, "Could find no file with with path '%s' and index in the range %d-%d\n", s->path, s->start_number, s->start_number + s->start_number_range - 1); return AVERROR(ENOENT); } } s->img_first = first_index; s->img_last = last_index; s->img_number = first_index; /* compute duration */ st->start_time = 0; st->duration = last_index - first_index + 1; } if(s1->video_codec_id){ st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = s1->video_codec_id; }else if(s1->audio_codec_id){ st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = s1->audio_codec_id; }else{ const char *str= strrchr(s->path, '.'); s->split_planes = str && !av_strcasecmp(str + 1, "y"); st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = ff_guess_image2_codec(s->path); if (st->codec->codec_id == AV_CODEC_ID_LJPEG) st->codec->codec_id = AV_CODEC_ID_MJPEG; } if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != PIX_FMT_NONE) st->codec->pix_fmt = pix_fmt; return 0; }