[Libav-user] newb mp4 question

Atli Thorbjornsson atlithorn at gmail.com
Thu Oct 6 13:42:47 CEST 2011


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.

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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