In general, MediaCodec is the one that would be recommended. The OpenMAX AL API was added as a stopgap measure in Android Stagefright is a successor to OpenCore on Android platform compliant to OpenMAX IL, shipped in GB and later android distributions. gst-openmax for android. Contribute to prajnashi/gst-openmax development by creating an account on GitHub.

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Forums – MediaCodec vs OpenMAX as implementation interface

OpenMAX AL is the interface between multimedia applications, such as a media player, and the platform media framework. OpenMAX is used mostly by hardware vendors to provide decoders but it is almost useless at higher level.

From Wikipedia, the free encyclopedia. Media architecture Application Framework At the application framework level is application code that utilizes android.

Initially announced in July Standards androidd the Khronos Group. If you need to do openmaz of the decoded frames, MediaCodec is probably the only way to go. It does not support any container format at all on its own, but you as a caller are supposed to take care of that. Stagefright comes with built-in software codecs for common media formats, but you can also add your own custom hardware codecs as OpenMAX components.

I saw that OpenMAX is not fully implemented and lacks support in terms of documentation, examples etc. Login or Register to post a comment.

Build your plugin as a shared library opwnmax the name libstagefrighthw. Archived from the original PDF on Archived copy as title Pages using deprecated image syntax.

Is this assumption correct? Requires you to handle sync manually Quite low level, requires you to do a lot of work For extracting individual packets of data, there’s the MediaExtractor class, which will be useful with some common androic formats for static files.

For extracting individual packets of data, there’s the MediaExtractor class, which will be useful with some common file formats for static files. Up 0 Down 0.

To add your own codecs: I will double check. If you use MediaCodec. Hi Poenmax, Here are the answers to your questions.


I fully agree that there’s an exterme lack of documentation and support for a lot of media playback, especially in the OpenMAX world. It does not give you direct access to the decoded data either, but it is played back directly. Please note that if you use OpenMAX, you’re tacetly going to have to remember that it’s not an audio renderer; you will have to take the decoded audio and play it via OpenSLES to get something working.

Adnroid makes no representations, warranties, or other commitments whatsoever about any non-Qualcomm sites or third-party resources that may be referenced, accessible from, or linked to this site. Components can be sources, sinks, codecs, filters, splitters, mixers, or any other sndroid operator. Is this the best way to use hardware decoders on mobile Snapdragon on Android?

It provides abstractions for routines that are especially useful for processing of audio, video, and still images. There was a nice presentation I saw QC give a while ago on how to recompile the Android system to give you QC libraries you can package with your application that androd full support for OpenMAX but I can no longer find that presentation.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Avoid writing own time sync for audio and video. The content is provided for informational purposes only and is not meant to be an endorsement or representation by Qualcomm or any other party.

The interface abstracts the hardware and software architecture in the system. It is an application-level, C-languagemultimedia API designed for resource-constrained devices. It does not support other container formats. This plugin links Stagefright with your custom codec components, which must be implemented according to the OpenMAX IL component standard.

OpenMAX AL hardware video decoding for OF Android – android – openFrameworks

Everything else With MediaCodec, you need to provide individual ansroid of data to decode. Hope this kpenmax to other people. As usual nothing relevant at Qualcomm site. To set a hardware path to encode and decode media, you must implement a hardware-based codec as an OpenMax IL Integration Layer component. OpenMAX provides three layers of interfaces: It allows companies to easily integrate new hardware that supports OpenMAX DL without reoptimizing their low level software.


OpenMAX AL accommodates common multimedia application use cases by standardizing a set of representative objectsas well as interfaces on those objects, to control and configure them. You can get full implementations from 3rd parties, but in general, expect that if you want to display mp4 ts files, you’re going to use OpenMAX and MediaCodec for everything else.

If you use MediaCodec, you would need to handle sync of audio and video during playback.

OpenMAX – Wikipedia

Syncing worked out fine till I can get decode and play done within budget. Implementing custom codecs Stagefright comes with built-in software codecs for common media formats, but you can also add your own custom hardware codecs as OpenMAX components. I am hoping that you can support streaming decoding of video mp4 etc. Webarchive template wayback links CS1 maint: Depending on the implementation, a component could possibly represent a piece of hardware, a software codec, another processor, or a combination thereof.

So if you want to do streaming playback of a format other than MPEG TS, you need to handle extracting of the packets yourself or use opnemax other library, such as libavformat, for that task. One more question – Does MediaCodec guarantee that it will use hardware decoders and if fails then fallbacks to sw mode?

OpenMAX AL for Android

It allows companies that develop applications to easily migrate their applications to different platforms customers that support the OpenMAX AL application programming interface API. I am open to any other framework free or commercial that would accomplish above. Stagefright comes with a default list of supported software codecs and you can implement your own hardware codec by using the OpenMax integration layer standard.

Stagefright audio and video playback features include integration with OpenMAX codecs, session management, time-synchronized rendering, transport control, and DRM.