When upgrading to 5.10 , the includes a new and improved transcode system is automatically used. The old transcode system can still be used in 5.10, but it is considered deprecated and will not be available in future releases. Customers must therefore be migrated to the new transcode system before upgrading to a 6-version.
If you are a consultant, please see DC 5.10 Formats - Migration for more information on how the migration to the new transcode system is handled and things to be aware of in relation to this migration.
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In the previous version of the old transcode system, it was possible to embed EXIF metadata in the generated qualitiesrenditions/transcodes. This is not supported in the new transcode system.
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It has been ensured that the automatic switch to the new transcode system is seamless in all applications and integrations developed by Digizuite. However, the new transcode system has a few caveats to be aware of for anyone who uses the Digizuite API or SDK.
Handling of unavailable qualitiesrenditions.
Search2.
New thumbnail formats.
Source formats.
jpg
/jpeg
formats
Handling of unavailable
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renditions
Previously, asset streamer URLs would never be returned for qualities renditions that hadn’t been generated yet. However, with the new transcode system, asset streamer URLs are returned for qualities renditions that can be generated but are not necessarily ready yet.
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By default, when requesting a quality rendition of an asset with the asset streamer, the request will not terminate before the quality rendition is available. This process can take a while. If you do not want to wait for qualities renditions to become available, it is possible to get a fallback image returned with the HTTP status code 202 if the requested quality rendition is not immediately available. This can be done in the following way:
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Note that most modern browsers limit the maximum number of simultaneous HTTP connections. Thus, if you show a lot of qualities renditions simultaneously (e.g., thumbnails in an asset list), strongly consider using the mode
argument to limit the number of simultaneous HTTP connections. Please be careful that you do not cache the fallback image as the requested image.
In rare cases, the generation of a rendition might fail. In the old transcode system, an asset streamer URL would not be returned in this case. In the new transcode system, an asset streamer URL is returned in this case, but the asset streamer request returns an HTTP 502 error. If the mode
is set to getFallbackImageIfUnavailable
, a fallback image is still returned in this case.
If you are using the SDK, be aware that the default HTTP client used by the SDK has a timeout of 100 seconds. Thus, if you request a quality rendition that takes more than 100 seconds to become available with the INewAssetStreamerService.GetAssetDownloadStream
method, your request will time out before the quality rendition is returned. To disable this timeout, use the following setup in your application startup logic:
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Note that this removes the default timeout of 100 seconds from all HTTP requests performed with the SDK. However, it is still possible to control the timeout per-request by passing a cancellation token to the SDK method used. The effective timeout is always the smallest of the passed cancellation tokens token and the timeout configured for the HTTP client used by the SDK.
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Search2 allows the tables
media_transcode_proxy_destination
andmedia_transcode_proxy
to be referenced in both input and output, providing access to information about qualitiesrenditions. Information about qualities renditions generated with the new transcode system can not be accessed through these tables.Search2 allows URLs for qualities renditions of old media formats to be retrieved with the functions
urlAbsolut
,urlRelative
,downloadUrlAbsolut
, anddownloadUrlRelative
. It has been ensured that this still works, even if the targeted old media format has been mapped to a new format. If an old media format has not been mapped to a new format, these functions work in exactly the same way as previously. However, a few caveats should be mentioned in the case where an old media format is mapped to a new format:A URL is always returned, even though a quality rendition of the asset in the old media format can not be generated. As an example, this means that a
thumb
URL is included for an asset in the defaultGetAssets
search, even if it can not be generated. Previously, thethumb
URL would benull
in this case. Thus, it must be ensured that clients do not rely on the URL in a search to benull
when it can't be generated.If the
urlRelative
ordownloadUrlRelative
function is used, the returned relative URL will be relative to<api-url>
instead of<api-url>/dmm3bwsv3
as it was before.
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The new transcode system now supports a special SourceFormat
that can be used to refer to and get the source files of assets. A special “Original” format of this type is now defined out-of-the-box. If you have previously hard-coded the “Original” format in a list of available download qualitiesrenditions, this can lead to two “Original” formats being shown. It should no longer be necessary to have any special-case handling for getting source formats.
jpg
/jpeg
formats
The new transcode system uses the jpeg
extension for jpg
/jpeg
files and renditions. Existing renditions that have not been generated with the new transcode system will have the same extension as before. Thus, existing jpg
/jpeg
files and renditions will still be returned with the jpg
extension if this was the behavior before upgrading to 5.10. New jpg
/jpeg
renditions that are generated with the new transcode system will have the jpeg
extension.
Please be aware of this if you have any custom logic that relies on the jpg
extension and does not handle the jpeg
extension.