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L'HDR (High Dynamic Range) offre una gamma più ampia di colori e un maggiore
contrasto tra i bianchi più brillanti e le ombre più scure, con una qualità video
che si avvicina maggiormente a ciò che percepisce l'occhio nudo.
Puoi configurare la riproduzione di video HDR nella tua app per visualizzare l'anteprima e riprodurre contenuti video HDR.
Questo articolo presuppone che tu abbia già aggiunto il supporto di base per la riproduzione video alla tua app. Per ulteriori dettagli sulla riproduzione, consulta la documentazione di ExoPlayer.
Prerequisiti del dispositivo
La riproduzione HDR non è supportata da tutti i dispositivi Android. Prima di riprodurre contenuti video HDR
nella tua app, determina se il tuo dispositivo soddisfa i seguenti
prerequisiti:
Ha come target Android 7.0 o versioni successive (livello API 24).
Dispone di un decoder compatibile con HDR e di un accesso a un display compatibile con HDR.
Controllare il supporto della riproduzione HDR
Utilizza Display.getHdrCapabilities() per eseguire query sulle funzionalità HDR di un display. Il metodo restituisce informazioni sui profili HDR e sulla gamma di luminanza supportati per il display.
Il seguente codice controlla se il dispositivo supporta la riproduzione HLG10. A partire da Android 13, HLG10 è lo standard minimo che i produttori di dispositivi devono supportare se il dispositivo è in grado di riprodurre contenuti HDR:
Kotlin
// Check if display supports the HDR typevalcapabilities=display?.hdrCapabilities?.supportedHdrTypes?:intArrayOf()if(!capabilities.contains(HDR_TYPE_HLG)){throwRuntimeException("Display does not support desired HDR type");}
Java
// Check if display supports the HDR typeint[]list=getDisplay().getHdrCapabilities().getSupportedHdrTypes();Listcapabilities=Arrays.stream(list).boxed().collect(Collectors.toList());if(!capabilities.contains(HDR_TYPE_HLG)){thrownewRuntimeException("Display does not support desired HDR type");}
Se la tua app non utilizza ExoPlayer, configura la riproduzione HDR utilizzando MediaCodec tramite SurfaceView.
Configurare MediaCodec utilizzando SurfaceView
Configura un flusso di riproduzione standard MediaCodec utilizzando SurfaceView. In questo modo, puoi visualizzare contenuti video HDR senza alcuna gestione speciale per la riproduzione HDR:
MediaCodec: decodifica i contenuti video HDR.
SurfaceView: mostra i contenuti video HDR.
Il seguente codice verifica se il codec supporta il profilo HDR, quindi configura MediaCodec utilizzando SurfaceView:
Kotlin
// Check if there's a codec that supports the specific HDR profilevallist=MediaCodecList(MediaCodecList.REGULAR_CODECS)varformat=MediaFormat()/* media format from the container */;format.setInteger(MediaFormat.KEY_PROFILE,MediaCodecInfo.CodecProfileLevel.AV1ProfileMain10)valcodecName=list.findDecoderForFormat(format)?:throwRuntimeException("No codec supports the format")// Here is a standard MediaCodec playback flowvalcodec:MediaCodec=MediaCodec.createByCodecName(codecName);valsurface:Surface=surfaceView.holder.surfacevalcallback:MediaCodec.Callback=(object:MediaCodec.Callback(){overridefunonInputBufferAvailable(codec:MediaCodec,index:Int){queue.offer(index)}overridefunonOutputBufferAvailable(codec:MediaCodec,index:Int,info:MediaCodec.BufferInfo){codec.releaseOutputBuffer(index,timestamp)}overridefunonError(codec:MediaCodec,e:MediaCodec.CodecException){// handle error}overridefunonOutputFormatChanged(codec:MediaCodec,format:MediaFormat){// handle format change}})codec.setCallback(callback)codec.configure(format,surface,crypto,0/* flags */)codec.start()while(/* until EOS */){valindex=queue.poll()valbuffer=codec.getInputBuffer(index)buffer?.put(/* write bitstream */)codec.queueInputBuffer(index,offset,size,timestamp,flags)}codec.stop()codec.release()
Java
// Check if there's a codec that supports the specific HDR profileMediaCodecListlist=newMediaCodecList(MediaCodecList.REGULAR_CODECS);MediaFormatformat=/* media format from the container */;format.setInteger(MediaFormat.KEY_PROFILE,CodecProfileLevel.AV1ProfileMain10);StringcodecName=list.findDecoderForFormat(format);if(codecName==null){thrownewRuntimeException("No codec supports the format");}// Below is a standard MediaCodec playback flowMediaCodeccodec=MediaCodec.getCodecByName(codecName);Surfacesurface=surfaceView.getHolder().getSurface();MediaCodec.Callbackcallback=newMediaCodec.Callback(){@OverridevoidonInputBufferAvailable(MediaCodeccodec,intindex){queue.offer(index);}@OverridevoidonOutputBufferAvailable(MediaCodeccodec,intindex){// release the buffer for rendercodec.releaseOutputBuffer(index,timestamp);}@OverridevoidonOutputFormatChanged(MediaCodeccodec,MediaFormatformat){// handle format change}@OverridevoidonError(MediaCodeccodec,MediaCodec.CodecExceptionex){// handle error}};codec.setCallback(callback);codec.configure(format,surface,crypto,0/* flags */);codec.start();while(/* until EOS */){intindex=queue.poll();ByteBufferbuffer=codec.getInputBuffer(index);buffer.put(/* write bitstream */);codec.queueInputBuffer(index,offset,size,timestamp,flags);}codec.stop();codec.release();
ExoPlayer: scopri come configurare la tua app con la libreria ExoPlayer.
I campioni di contenuti e codice in questa pagina sono soggetti alle licenze descritte nella Licenza per i contenuti. Java e OpenJDK sono marchi o marchi registrati di Oracle e/o delle sue società consociate.
Ultimo aggiornamento 2025-08-27 UTC.
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Mancano le informazioni di cui ho bisogno","missingTheInformationINeed","thumb-down"],["Troppo complicato/troppi passaggi","tooComplicatedTooManySteps","thumb-down"],["Obsoleti","outOfDate","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Problema relativo a esempi/codice","samplesCodeIssue","thumb-down"],["Altra","otherDown","thumb-down"]],["Ultimo aggiornamento 2025-08-27 UTC."],[],[],null,["# HDR video playback\n\nHDR, or High Dynamic Range, provides a wider range of colors and greater\ncontrast between the brightest whites and darkest shadows, resulting in video\nquality that more closely resembles what the naked eye perceives.\n\nYou can set up HDR video playback in your app to preview and play back HDR video\ncontent.\n\nThis article assumes that you've already added basic video playback support to\nyour app. See the [ExoPlayer](/guide/topics/media/exoplayer) documentation for\nmore details on playback.\n\nDevice prerequisites\n--------------------\n\nNot all Android devices support HDR playback. Before playing back HDR\nvideo content in your app, determine if your device meets the following\nprerequisites:\n\n- Targets Android 7.0 or higher (API layer 24).\n- Has a HDR-capable decoder and access to a HDR-capable display.\n\nCheck for HDR playback support\n------------------------------\n\nUse [`Display.getHdrCapabilities()`](/reference/android/view/Display#getHdrCapabilities()) to query a display's HDR capabilities. The method returns information about the supported HDR profiles and luminance range for the display.\n\nThe following code checks if the device supports HLG10 playback. Starting in Android 13, HLG10 is the minimum standard that device makers must support if the device is capable of HDR playback: \n\n### Kotlin\n\n```kotlin\n// Check if display supports the HDR type\nval capabilities = display?.hdrCapabilities?.supportedHdrTypes ?: intArrayOf()\nif (!capabilities.contains(HDR_TYPE_HLG)) {\n throw RuntimeException(\"Display does not support desired HDR type\");\n}\n```\n\n### Java\n\n```java\n// Check if display supports the HDR type\nint[] list = getDisplay().getHdrCapabilities().getSupportedHdrTypes();\nList capabilities = Arrays.stream(list).boxed().collect(Collectors.toList());\nif (!capabilities.contains(HDR_TYPE_HLG)) {\n throw new RuntimeException(\"Display does not support desired HDR type\");\n}\n```\n\nSet up HDR playback in your app\n-------------------------------\n\nIf your app uses [ExoPlayer](https://exoplayer.dev/), it supports HDR playback by default. See [Check for HDR playback support](#check_for_hdr_playback_support) for next steps.\n\nIf your app does not use ExoPlayer, set up HDR playback using `MediaCodec` via `SurfaceView`.\n| **Note:** HDR playback has limited support on [`TextureView`](/reference/android/view/TextureView) in Android 13 (API layer 33) and higher. When playing back HDR video content, `TextureView` transcodes the video from HDR to SDR, resulting in playback with possible loss of detail including clipped colors and video banding. If at all possible, you should use `SurfaceView` for HDR playback.\n\n### Set up MediaCodec using SurfaceView\n\nSet up a standard [`MediaCodec`](/reference/android/media/MediaCodec) playback flow using [`SurfaceView`](https://developer.android.com/reference/android/view/SurfaceView). This allows you to display HDR video content without any special handling for HDR playback:\n\n- `MediaCodec`: Decodes HDR video content.\n- `SurfaceView`: Displays HDR video content.\n\nThe following code checks if the codec supports the HDR profile, then sets up `MediaCodec` using `SurfaceView`: \n\n### Kotlin\n\n```kotlin\n// Check if there's a codec that supports the specific HDR profile\nval list = MediaCodecList(MediaCodecList.REGULAR_CODECS) var format = MediaFormat() /* media format from the container */;\nformat.setInteger(MediaFormat.KEY_PROFILE, MediaCodecInfo.CodecProfileLevel.AV1ProfileMain10)\nval codecName = list.findDecoderForFormat (format) ?: throw RuntimeException (\"No codec supports the format\")\n\n// Here is a standard MediaCodec playback flow\nval codec: MediaCodec = MediaCodec.createByCodecName(codecName);\nval surface: Surface = surfaceView.holder.surface\nval callback: MediaCodec.Callback = (object : MediaCodec.Callback() {\n override fun onInputBufferAvailable(codec: MediaCodec, index: Int) {\n queue.offer(index)\n }\n\n override fun onOutputBufferAvailable(\n codec: MediaCodec,\n index: Int,\n info: MediaCodec.BufferInfo\n ) {\n codec.releaseOutputBuffer(index, timestamp)\n }\n\n override fun onError(codec: MediaCodec, e: MediaCodec.CodecException) {\n // handle error\n }\n\n override fun onOutputFormatChanged(\n codec: MediaCodec, format: MediaFormat\n ) {\n // handle format change\n }\n})\n\ncodec.setCallback(callback)\ncodec.configure(format, surface, crypto, 0 /* flags */)\ncodec.start()\nwhile (/* until EOS */) {\n val index = queue.poll()\n val buffer = codec.getInputBuffer(index)\n buffer?.put(/* write bitstream */)\n codec.queueInputBuffer(index, offset, size, timestamp, flags)\n}\ncodec.stop()\ncodec.release()\n```\n\n### Java\n\n```java\n// Check if there's a codec that supports the specific HDR profile\nMediaCodecList list = new MediaCodecList(MediaCodecList.REGULAR_CODECS);\nMediaFormat format = /* media format from the container */;\nformat.setInteger(\n MediaFormat.KEY_PROFILE, CodecProfileLevel.AV1ProfileMain10);\nString codecName = list.findDecoderForFormat(format);\nif (codecName == null) {\n throw new RuntimeException(\"No codec supports the format\");\n}\n\n// Below is a standard MediaCodec playback flow\nMediaCodec codec = MediaCodec.getCodecByName(codecName);\nSurface surface = surfaceView.getHolder().getSurface();\nMediaCodec.Callback callback = new MediaCodec.Callback() {\n @Override\n void onInputBufferAvailable(MediaCodec codec, int index) {\n queue.offer(index);\n }\n\n @Override\n void onOutputBufferAvailable(MediaCodec codec, int index) {\n // release the buffer for render\n codec.releaseOutputBuffer(index, timestamp);\n }\n\n @Override\n void onOutputFormatChanged(MediaCodec codec, MediaFormat format) {\n // handle format change\n }\n\n @Override\n void onError(MediaCodec codec, MediaCodec.CodecException ex) {\n // handle error\n }\n\n};\ncodec.setCallback(callback);\ncodec.configure(format, surface, crypto, 0 /* flags */);\ncodec.start();\nwhile (/* until EOS */) {\n int index = queue.poll();\n ByteBuffer buffer = codec.getInputBuffer(index);\n buffer.put(/* write bitstream */);\n codec.queueInputBuffer(index, offset, size, timestamp, flags);\n}\ncodec.stop();\ncodec.release();\n```\n\nFor more `MediaCodec` implementations using `SurfaceView`, see the [Android Camera samples](https://github.com/android/camera-samples).\n| **Note:** Android takes screenshots in SDR. HDR content is tonemapped to SDR in screenshots.\n\nResources\n---------\n\nFor more information related to HDR playback, see the following resources:\n\n### HDR\n\n- [HDR video capture](/training/camera2/hdr-video-capture): learn how to set up HDR video capture using the Camera2 APIs.\n- [Camera2Video sample on Github](https://github.com/android/camera-samples/tree/main/Camera2Video): see a working app with HDR capture and playback functionality.\n\n### Media\n\n- [Media API reference](/reference/android/media/package-summary): learn more about the Media APIs.\n- [ExoPlayer](https://exoplayer.dev/): learn how to set up your app with the ExoPlayer library."]]