Retreive dwnload url of web playab;e flavor

How to retreive download url of web playable entry?

        Kaltura.KalturaClient client = getKalturaClient();

        IList<KalturaFlavorAsset> asts = client.FlavorAssetService.GetByEntryId(entryId);
        for (int i = 0; i < asts.Count; i++)
        {
            KalturaFlavorAsset anAst = asts[i];
            if (asts[i].Status!=KalturaFlavorAssetStatus.READY)
            {
                continue;
            }
       
            try
            {
                url = client.FlavorAssetService.GetDownloadUrl(anAst.Id);
            }

}

How can we find entry Id. Is it same or different for every url?