static int opt_input_file(OptionsContext *o, const char *opt, const char *filename) { AVFormatContext *ic; AVInputFormat *file_iformat = NULL; int err, i, ret; int64_t timestamp; uint8_t buf[128]; AVDictionary **opts; int orig_nb_streams; // number of streams before avformat_find_stream_info if (o->format) { if (!(file_iformat = av_find_input_format(o->format))) { av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format); exit_program(1); } } if (!strcmp(filename, "-")) filename = "pipe:"; using_stdin |= !strncmp(filename, "pipe:", 5) || !strcmp(filename, "/dev/stdin"); /* get default parameters from command line */ ic = avformat_alloc_context(); if (!ic) { print_error(filename, AVERROR(ENOMEM)); exit_program(1); } if (o->nb_audio_sample_rate) { snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i); av_dict_set(&format_opts, "sample_rate", buf, 0); } if (o->nb_audio_channels) { snprintf(buf, sizeof(buf), "%d", o->audio_channels[o->nb_audio_channels - 1].u.i); av_dict_set(&format_opts, "channels", buf, 0); } if (o->nb_frame_rates) { av_dict_set(&format_opts, "framerate", o->frame_rates[o->nb_frame_rates - 1].u.str, 0); } if (o->nb_frame_sizes) { av_dict_set(&format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0); } if (o->nb_frame_pix_fmts) av_dict_set(&format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0); ic->video_codec_id = video_codec_name ? find_codec_or_die(video_codec_name , AVMEDIA_TYPE_VIDEO , 0)->id : CODEC_ID_NONE; ic->audio_codec_id = audio_codec_name ? find_codec_or_die(audio_codec_name , AVMEDIA_TYPE_AUDIO , 0)->id : CODEC_ID_NONE; ic->subtitle_codec_id= subtitle_codec_name ? find_codec_or_die(subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, 0)->id : CODEC_ID_NONE; ic->flags |= AVFMT_FLAG_NONBLOCK; ic->interrupt_callback = int_cb; if (loop_input) { av_log(NULL, AV_LOG_WARNING, "-loop_input is deprecated, use -loop 1\n"); ic->loop_input = loop_input; } /* open the input file with generic avformat function */ err = avformat_open_input(&ic, filename, file_iformat, &format_opts); if (err < 0) { print_error(filename, err); exit_program(1); } assert_avoptions(format_opts); /* apply forced codec ids */ for (i = 0; i < ic->nb_streams; i++) choose_decoder(o, ic, ic->streams[i]); /* Set AVCodecContext options for avformat_find_stream_info */ opts = setup_find_stream_info_opts(ic, codec_opts); orig_nb_streams = ic->nb_streams; /* If not enough info to get the stream parameters, we decode the first frames to get it. (used in mpeg case for example) */ ret = avformat_find_stream_info(ic, opts); if (ret < 0) { av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename); av_close_input_file(ic); exit_program(1); } timestamp = o->start_time; /* add the stream start time */ if (ic->start_time != AV_NOPTS_VALUE) timestamp += ic->start_time; /* if seeking requested, we execute it */ if (o->start_time != 0) { ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD); if (ret < 0) { av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n", filename, (double)timestamp / AV_TIME_BASE); } } /* update the current parameters so that they match the one of the input stream */ add_input_streams(o, ic); /* dump the file content */ av_dump_format(ic, nb_input_files, filename, 0); input_files = grow_array(input_files, sizeof(*input_files), &nb_input_files, nb_input_files + 1); input_files[nb_input_files - 1].ctx = ic; input_files[nb_input_files - 1].ist_index = nb_input_streams - ic->nb_streams; input_files[nb_input_files - 1].ts_offset = o->input_ts_offset - (copy_ts ? 0 : timestamp); input_files[nb_input_files - 1].nb_streams = ic->nb_streams; input_files[nb_input_files - 1].rate_emu = o->rate_emu; for (i = 0; i < o->nb_dump_attachment; i++) { int j; for (j = 0; j < ic->nb_streams; j++) { AVStream *st = ic->streams[j]; if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1) dump_attachment(st, o->dump_attachment[i].u.str); } } for (i = 0; i < orig_nb_streams; i++) av_dict_free(&opts[i]); av_freep(&opts); reset_options(o, 1); return 0; }