- Missing Plug In On Mac For Amazon Video
- Missing Plug In For Amazon Video On Mac
- Missing Plug In For Amazon Video On Mac
Missing demuxer. Typically after running typefind on the data we determine the type of the file. If there is no plugin found for the type, a missing-plugin element message is posted by decodebin with the following fields: Type set to 'decoder', detail set to the caps for witch no plugin was found. Optionally the friendly name can be filled in. The Prime Video app is available on a range of televisions, Amazon devices, mobile devices, Blu-ray players, games consoles and streaming media devices. Open your device's app store to download and install the Prime Video app. Open the Prime Video app. Register your device by selecting Register on the Amazon website. You will be given a code to. Open your internet browser. You can use any desktop browser, such as Firefox, Safari, Chrome or Opera. Go to www.amazon.com in your browser. Type www.amazon.com into the address bar, and hit ↵ Enter or ⏎ Return on your. Hover over the Accounts & Lists tab. This button is located.
The mechanism and API described in this document requires GStreamer coreand gst-plugins-base versions >= 0.10.12. Further information on someaspects of this document can be found in the libgstbaseutils APIreference.
We only discuss playback pipelines for now.
A three step process:
Elements will use a 'missing-plugin' element message to reportmissing plugins, with the following fields set:
type: (string) { 'urisource', 'urisink', 'decoder', 'encoder','element' } (we do not distinguish between demuxer/decoders/parsers etc.)detail: (string) or (caps) depending on the type { ANY } ex: 'mms,'mmsh', 'audio/x-mp3,rate=48000,…'name: (string) { ANY } ex: 'MMS protocol handler',..
missing uri handler
ex. mms://foo.bar/file.asf
When no protocol handler is installed for mms://, the application will not beable to instantiate an element for that uri (gst_element_make_from_uri()returns NULL).
Playbin will post a missing-plugin element message with the type set to'urisource', detail set to 'mms'. Optionally the friendly name can be filledin as well.
missing typefind function
We don't recognize the type of the file, this should normally not happenbecause all the typefinders are in the basic GStreamer installation.There is not much useful information we can give about how to resolve thisissue. It is possible to use the first N bytes of the data to determine thetype (and needed plugin) on the server. We don't explore this option in thisdocument yet, but the proposal is flexible enough to accommodate this in thefuture should the need arise.
missing demuxer
Typically after running typefind on the data we determine the type of thefile. If there is no plugin found for the type, a missing-plugin elementmessage is posted by decodebin with the following fields: Type set to'decoder', detail set to the caps for witch no plugin was found. Optionallythe friendly name can be filled in as well.
missing decoder
The demuxer will dynamically create new pads with specific caps while itfigures out the contents of the container format. Decodebin tries to find thedecoders for these formats in the registry. If there is no decoder found, amissing-plugin element message is posted by decodebin with the followingfields: Type set to 'decoder', detail set to the caps for which no pluginwas found. Optionally the friendly name can be filled in as well. There isno distinction made between the missing demuxer and decoder at theapplication level.
missing element
Decodebin and playbin will create a set of helper elements when they set uptheir decoding pipeline. These elements are typically colorspace, sample rate,audio sinks,... Their presence on the system is required for the functionalityof decodebin. It is typically a package dependency error if they are notpresent but in case of a corrupted system the following missing-pluginelement message will be emitted: type set to 'element', detail set to theelement factory name and the friendly name optionally set to a descriptionof the element's functionality in the decoding pipeline.
Except for reporting the missing plugins, no further policy is enforced at theGStreamer level. It is up to the application to decide whether a missingplugin constitutes a problem or not.
Application level
The application's job is to listen for the missing-plugin element messagesand to decide on a policy to handle them. Following cases exist:
partially missing plugins
The application will be able to complete a state change to PAUSED but therewill be a missing-plugin element message on the GstBus.
This means that it will be possible to play back part of the media file but notall of it.
For example: suppose we have an .avi file with mp3 audio and divx video. If wehave the mp3 audio decoder but not the divx video decoder, it will be possibleto play only the audio part but not the video part. For an audio playbackapplication, this is not a problem but a video player might want to decide on:
- require the use to install the additionally required plugins.
- inform the user that only the audio will be played back
- ask the user if it should download the additional codec or only playthe audio part.
- …
completely unplayable stream
The application will receive an ERROR message from GStreamer informing it thatplayback stopped (before it could reach PAUSED). This happens because none ofthe streams is connected to a decoder. The error code and domain should be oneof the following in this case:
GST_CORE_ERROR_MISSING_PLUGIN(domain:GST_CORE_ERROR)GST_STREAM_ERROR_CODEC_NOT_FOUND(domain:GST_STREAM_ERROR)
The application can then see that there are a set of missing-plugin elementmessages on the GstBus and can decide to trigger the download procedure. Itdoes that as described in the following section.
missing-plugin element messages can be identified using the functiongst_is_missing_plugin_message().
Plugin download stage
At this point the application has
- collected one or more
missing-pluginelement messages - made a decision that additional plugins should be installed
Missing Plug In On Mac For Amazon Video
It will call a GStreamer utility function to convert each missing-pluginmessage into an identifier string describing the missing capability. This isdone using the function gst_missing_plugin_message_get_installer_detail().
The application will then pass these strings to gst_install_plugins_async()or gst_install_plugins_sync() to initiate the download. See the APIdocumentation there (libgstbaseutils, part of gst-plugins-base) for moredetails.
When new plugins have been installed, the application will have to initiatea re-scan of the GStreamer plugin registry using gst_update_registry().
Format of the (UTF-8) string ID passed to the external installer system
The string is made up of several fields, separated by '|' characters.The fields are:
plugin system identifier, ie. 'gstreamer' This identifier determinesthe format of the rest of the detail string. Automatic plugininstallers should not process detail strings with unknownidentifiers. This allows other plugin-based libraries to use thesame mechanism for their automatic plugin installation needs, or forthe format to be changed should it turn out to be insufficient.
plugin system version, e.g. '1.0' This is required so that whenthere is a GStreamer-2.0 or GStreamer-3.0 at some point in future,the different major versions can still co-exist and use the sameplugin install mechanism in the same way.
application identifier, e.g. 'totem' This may also be in the form of'pid/12345' if the program name can’t be obtained for some reason.
human-readable localised description of the required component, e.g.'Vorbis audio decoder'
identifier string for the required component, e.g.
urisource-(
PROTOCOL_REQUIRED) e.g.urisource-httporurisource-mmselement-(
ELEMENT_REQUIRED), e.g.element-videoconvertdecoder-(
CAPS_REQUIRED) e.g.decoder-audio/x-vorbisordecoder-application/oggordecoder-audio/mpeg, mpegversion=(int)4ordecoder-video/mpeg, systemstream=(boolean)true, mpegversion=(int)2encoder-(
CAPS_REQUIRED) e.g.encoder-audio/x-vorbisoptional further fields not yet specified
An entire ID string might then look like this, for example:
gstreamer|0.10|totem|Vorbis audio decoder|decoder-audio/x-vorbisPlugin installers parsing this ID string should expect further fields alsoseparated by '|' symbols and either ignore them, warn the user, or errorout when encountering them.
The human-readable description string is provided by the libgstbaseutilslibrary that can be found in gst-plugins-base versions >= 0.10.12 and canalso be used by demuxers to find out the codec names for taglists from givencaps in a unified and consistent way.
Applications can create these detail strings using the function
gst_missing_plugin_message_get_installer_detail()on a given missing-pluginmessage.
Using missing-plugin messages for error reporting:
Missing-plugin messages are also useful for error reporting purposes, either inthe case where the application does not support libgimme-codec, or the externalinstaller is not available or not able to install the required plugins.
When creating error messages, applications may use the functiongst_missing_plugin_message_get_description() to obtain a possibly translateddescription from each missing-plugin message (e.g. 'Matroska demuxer' or'Theora video depayloader'). This can be used to report to the user exactlywhat it is that is missing.
Notes for packagers
An easy way to introspect plugin .so files is:
The output will be something like:
BUT could also be like this (from the faad element in this case):
Missing Plug In For Amazon Video On Mac
NOTE that this does not exactly match the caps string that the installerwill get from the application. The application will always ever ask forone of
When introspecting, keep in mind that there are GStreamer pluginsthat in turn load external plugins. Examples of these are pitfdll,ladspa, or the GStreamer libvisual plugin. Those plugins will onlyannounce elements for the currently installed external plugins atthe time of introspection! With the exception of pitfdll, this isnot really relevant to the playback case, but may become an issue infuture when applications like buzztard, jokosher or pitivi startrequestion elements by name, for example ladspa effect elements orso.
This case could be handled if those wrapper plugins would also provide agst-install-xxx-plugins-helper, where xxx={ladspa|visual|...}. Thus if thedistro specific gst-install-plugins-helper can't resolve a request for e.g.element-bml-sonicverb it can forward the request togst-install-bml-plugins-helper (bml is the buzz machine loader).