[Libav-user] newb mp4 question

[Alex Cohn]

On Thu, Oct 6, 2011 at 13:42, Atli Thorbjornsson <atlithorn at gmail.com> wrote:
> I was not aware that you could access stagefright on the device or do
> you mean building and shipping it with the app? Hadn't thought of
> that.
>
> Atli.

Yes, you can access the installed stagefright from native code. Your
mileage will vary, though. Gingerbread (2.3) devices should all
provide AAC decoder, but in reality, not all will give you the
hardware codec. And your native build will include unofficial includes
and libs from the platform tree, so there is no guarantee of forward
compatibility.

Alex

> On 6 October 2011 11:30, Alex Cohn <alexcohn at netvision.net.il> wrote:
>> On Thu, Oct 6, 2011 at 12:29, Atli Thorbjornsson <atlithorn at gmail.com> wrote:
>>> Yes, I tried that and it works but software decoding means cpu usage
>>> is really heavy, not optimal for an app that is supposed to run for a
>>> while. The same stream running on the native mediaplayer is running
>>> under 1% on most devices. I tried running with this idea with FFMPEG
>>> decoders, optimised for neon but have not been able to bring the cpu
>>> usage far down enough. Probably due to my lack of experience with
>>> FFMPEG.
>>>
>>> Seeing how the Android handles m4a like a champ I jumped on that idea
>>> but I guess I'll have to go back to libavcodec decoding and see if I
>>> can't make that work better.
>>>
>>> But thanks for chipping in Alex, I'm really impressed by the level of
>>> helpfulness on this list.
>>>
>>> Atli.
>>
>> You're welcome. Also, I would give a try to
>> http://code.google.com/p/aacdecoder-android/. And if you can allow
>> that, use raw .aac for Android 3.1+, as documented in
>> http://developer.android.com/guide/appendix/media-formats.html.
>>
>> Finally, you can use stagefright or IOMX to access the hardware
>> decoder that underlies the MediaPlayer Java class.
>>
>> Hope this helps,
>> Alex
>>
>>> On 6 October 2011 10:04, Alex Cohn <alexcohn at netvision.net.il> wrote:
>>>> On Thu, Oct 6, 2011 at 12:00, Atli Thorbjornsson <atlithorn at gmail.com> wrote:
>>>>> Thanks Andrey, unfortunately the Android does not support FLV
>>>>> contained AAC. The stream I'm trying to use is actually FLV and I was
>>>>> hoping to remux to MP4 since that seems to be the only way that the
>>>>> Android can play AAC from the network.
>>>>>
>>>>> Atli.
>>>>
>>>> Have you tried the recepy at
>>>> http://vaclavb.blogspot.com/2010/06/raw-aac-player-for-android.html?
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