Re: How to encode/decode using OpenMAX AL APIs present in Android4.0 (Ice Cream Sandwich) H.264 codec stream

[Glenn Kasten]

I suggest you look at this API instead, it is closer to what you need:

  http://developer.android.com/intl/fr/reference/android/media/MediaCodec.html

The subset of OpenMAX AL implemented on Android was designed for a very narrow use case:

playback of MPEG-2 transport streams.

On Monday, November 12, 2012 1:34:23 AM UTC-8, VConf wrote:

Hi,

I would like to create a video conferencing application in android. 

I am able to do the signalling using third-party SIP framework to establish the call.

But, I want to make use of OpenMAX AL APIs present in Android 4.0 (Ice Cream Sandwich) to encode and decode the streaming data. 

http://www.khronos.org/news/permalink/android-releases-updated-ndk-adding-openmax-al-and-opensl-es-apis

My requirement is like,

1) I want to capture the camera frames which are encoded in H.264 codec to send to other party in the call.

2) On the other side I want to decode the H.264 codec RTP stream using the OpenMAX AI layer APIs.

Please let me know any sample/example code for the usage of these android ICS, OpenMAX AL APIs to encode/decode the frames to do the streaming over RTP.

Thanks.

[nyronian]

Are you saying OpenMax AL will only play MPEG2-TS formats?  I have been looking for an answer to this.  I would assume I could then utilize FFMPeg libraries or something like that to transform say an MP4 but I am unsure about that as well.

[openser]

it seems there is no direct interface for hardware encode/decode , I ever  used  sansung MFC dsp for encode /decode on android , in which ,i access MFC driver directly for h264, h263 and mpeg4 encode and decode.  

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[Xiaodong Wang]

Hi Glenn,

Nice to see your comment, so far I also plan to design video chat feature based on OpenMax AL/IL, since the requirement is that video bit rate should be changed due to dynamic bandwidth shaping problem which depend on the network quality. So I wonder if MediaCodec could provide the ability to resolve such problem? Thanks!