SubtitleEdit/subtitleedit · error · Exception

{e.Message}

Error message

{e.Message}

What it means

Thrown by DCinemaSmpte2014.ValidationCallBack during ToText export when the generated DCinema XML fails validation against SMPTE-428-7-2014-DCST.xsd. Identical mechanism to the 2007/2010 variants: a ValidationEventArgs message is re-thrown as a bare Exception. The 2014 schema adds further constraints on top of 2010.

Source

Thrown at src/libse/SubtitleFormats/DCinemaSmpte2014.cs:604

                    xmld.LoadXml(result);
                    using (var xr = XmlReader.Create(zip))
                    {
                        xmld.Schemas.Add(null, xr);
                        xmld.Validate(ValidationCallBack);
                    }
                }
                catch (Exception exception)
                {
                    Errors = "Error validating xml via SMPTE-428-7-2014-DCST.xsd: " + exception.Message;
                }
            }

            return DCinemaSmpte2010.FixDcsTextSameLine(result);
        }

        private void ValidationCallBack(object sender, ValidationEventArgs e)
        {
            throw new Exception(e.Message);
        }

        public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
        {
            _errorCount = 0;
            var sb = new StringBuilder();
            lines.ForEach(line => sb.AppendLine(line));
            var xml = new XmlDocument { XmlResolver = null };
            xml.LoadXml(sb.ToString().Replace("<dcst:", "<").Replace("</dcst:", "</").Replace("xmlns=\"http://www.smpte-ra.org/schemas/428-7/2014/DCST\"", string.Empty)); // tags might be prefixed with namespace (or not)... so we just remove them

            var ss = Configuration.Settings.SubtitleSettings;
            try
            {
                ss.InitializeDCinemaSettings(true);
                XmlNode node = xml.DocumentElement.SelectSingleNode("Id");
                if (node != null)
                {
                    ss.CurrentDCinemaSubtitleId = node.InnerText;

View on GitHub (pinned to 17a9f07487)

Solutions

1. Read e.Message in the exception to identify the precise schema rule and element.
2. Add the missing 2014-specific attributes/elements (language, Region, etc.).
3. If 2014 features are not needed, export using the 2010 or 2007 profile.
4. Cross-check with an external SMPTE 428-7-2014 XSD validator.

// Pre-validate against SMPTE-428-7-2014-DCST.xsd with a collecting handler
var schemas = new XmlSchemaSet();
schemas.Add(null, "SMPTE-428-7-2014-DCST.xsd");
var settings = new XmlReaderSettings { ValidationType = ValidationType.Schema, Schemas = schemas };
var errors = new List<string>();
settings.ValidationEventHandler += (s, e) => errors.Add(e.Message);

try
{
    var text = format.ToText(subtitle, title);
}
catch (Exception ex) when (ex.Message.Contains("validation"))
{
    logger.Error(ex, "DCinema 2014 validation failed");
}

When it happens

Trigger: Exporting to DCinema 2014 XML whose content violates the 2014 schema — additional required attributes, stricter time code or language rules, or Font/Region constraints not present in earlier versions.

Common situations: Subtitles without the newer required metadata (e.g. Region dimensions, language tags); content targeting the 2010 or 2007 profile that does not satisfy 2014 additions.

Related errors

• {e.Message}
• {e.Message}
• MXF KLV packet - stream does not have 16 bytes available for
• NameList: Unable to read name list file: {fileNameOrUrl}
• Invalid ASSA time code: {time}

AI-assisted analysis of SubtitleEdit/subtitleedit@17a9f07487 (2026-08-13). Data as JSON: /api/errors/1b03ab3ec881e46c. Report an issue: GitHub.