Function dash_init

libavformat/dashenc.c:1246–1600

}

static int dash_init(AVFormatContext *s)
{
    DASHContext *c = s->priv_data;
    int ret = 0, i;
    char *ptr;
    char basename[1024];

    c->nr_of_streams_to_flush = 0;
    if (c->single_file_name)
        c->single_file = 1;
    if (c->single_file)
        c->use_template = 0;

    if (!c->profile) {
        av_log(s, AV_LOG_ERROR, "At least one profile must be enabled.\n");
        return AVERROR(EINVAL);
    }
    if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
        av_log(s, AV_LOG_ERROR,
               "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
        return AVERROR_EXPERIMENTAL;
    }

    if (c->lhls && !c->streaming) {
        av_log(s, AV_LOG_WARNING, "Enabling streaming as LHLS is enabled\n");
        c->streaming = 1;
    }

    if (c->lhls && !c->hls_playlist) {
        av_log(s, AV_LOG_INFO, "Enabling hls_playlist as LHLS is enabled\n");
        c->hls_playlist = 1;
    }

    if (c->ldash && !c->streaming) {
        av_log(s, AV_LOG_WARNING, "Enabling streaming as LDash is enabled\n");
        c->streaming = 1;
    }

    if (c->target_latency && !c->streaming) {
        av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as streaming is not enabled\n");
        c->target_latency = 0;
    }

    if (c->global_sidx && !c->single_file) {
        av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
        c->global_sidx = 0;
    }

    if (c->global_sidx && c->streaming) {
        av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
        c->global_sidx = 0;
    }
    if (c->frag_type == FRAG_TYPE_NONE && c->streaming) {
        av_log(s, AV_LOG_VERBOSE, "Changing frag_type from none to every_frame as streaming is enabled\n");
        c->frag_type = FRAG_TYPE_EVERY_FRAME;
    }

    if (c->write_prft < 0) {