[streaming] Re: Streaming mp4+AAC to mobile phones

[PERET Pierre-Hugues]

I give up !
it's time to pass to another thing... i cannot afford spending more time on 
that .
If anyone find the solution , let me know.


At 16:36 13/12/2005 +0100, you wrote:

>>...because the mobile tries to load the stream (instead of telling you 
>>that this type of stream is not supported), right? So maybe it is an sdp 
>>issue...
>>One thing to test if aac is supported at all might be:
>>1) encode a video with mp4/aac using vlc
>>2) hint the encoded file with mp4box and put it in DSS' streaming dir
>>3) access the encoded file directly without using an sdp file (e.g. 
>><rtsp://server:port/myfile.mp4>rtsp://server:port/myfile.mp4) to see if 
>>aac sound works.
>>==> If it does not work, i bet it's the phone not soppurting aac. Then we 
>>are sure that there's nothing wrong with the sdp (because it's not 
>>involved here) and it's also not the fault of VLC's mp4a packetizer 
>>(because this one is not involved when VLC encodes to file)
>>==> On the other hand, if it works, then there must be something wrong 
>>with either the sdp or the packetize_mp4a method -- or something 
>>completely different :-/
>
>I encoded a mp4/aac file, and hinted it with mp4creator , and sound is not 
>working. For this one, i think its a DSS issue, because the 
>sample_100kbit.mp4 (with aac) doesn't work either with DSS.
>I'm trying to find a streaming server that can stream mp4/aac to mobile 
>phones.
>
>>>when playing with the sdp file,i can make my mobile phone loading my aac 
>>>stream, but not playing it (player stuck at the end of loading).
>>
>>Unfortunately I can't test the stream right now, because my current 
>>provider does not allow any other traffic than http :(
>>
>>>looking at the code of the rtp module, i noticed amr / mpa4 sections 
>>>seems inappropriate for mobile streaming (looks normal). unfortunatly 
>>>i'm not able to implement such thing. Maybe i'm completely wrong ...
>>>correct me in this case.
>>
>>
>>
>>
>>>At 17:48 12/12/2005 +0100, you wrote:
>>>>Well,
>>>>back again !
>>>>streaming amr_wb is the same as amr_nb.. it doesn't play in QTplayer 
>>>>because it doesn't have the codecs, but the mobile player seems to 
>>>>accept it, but no sound is coming.
>>>>switch back to amr_nb and play with the sdp file....
>>>>
>>>>
>>>>At 11:55 12/12/2005 +0100, you wrote:
>>>>>I came to the same conclusion as you .
>>>>>For now, i'm working on the sdp stuff which i think is the problem. Or 
>>>>>it might be the reflector module of DSS (in this case i doubt i could 
>>>>>do anything for it).
>>>>>
>>>>>At 17:02 11/12/2005 -0800, Torben Knerr wrote:
>>>>>
>>>>>
>>>>>>On 12/11/05, PERET Pierre-Hugues 
>>>>>><<mailto:ph.peret at free.fr>ph.peret at free.fr> wrote:
>>>>>>>Didn't tried with ffmpeg's amr_wb.
>>>>>>>trying with http allways make my operator says wrong url, putting 
>>>>>>>the full path or not.
>>>>>>>
>>>>>>>I talked on irc with some guys, and it seems that it's not very 
>>>>>>>possible to do what i want , and someone oriented me to helix mobile 
>>>>>>>server and mobile encoder, but it's far too expensive....
>>>>>>>
>>>>>>>as i want to take an already running stream and transcode it to 3gp 
>>>>>>>, i think i cannot do that with opensource or free software.
>>>>>>
>>>>>>I think it is possible with vlc+dss, as soon as the sound issue is 
>>>>>>solved. Even though the stream might not be 100% 3gp spec compliant, 
>>>>>>it worked (at least with video only).
>>>>>>
>>>>>>>I noticed that DSS is not able to stream mp4+aac to mobile phone -> 
>>>>>>>nokia 6630 , sound is not working, even with the sample which comes 
>>>>>>>with the server. Making aac streaming working on the mobile would be 
>>>>>>>the solution.(amr is not my preference).
>>>>>>
>>>>>>I think that's not possible with the 6630, because it can not play 
>>>>>>aac streams :(
>>>>>>On the other hand DSS _is able_ to stream mp4+aac (as you can see the 
>>>>>>stream with different players, such as QT), so imho it is definitely 
>>>>>>the mobile, which is _not able_ to play rtsp-streamed aac.
>>>>>>But you are right, amr_nb is no solution because it is too crappy... 
>>>>>>amr_wb might be okay, even though not as good as aac.
>>>>>>
>>>>>>>if you know a streaming server that can do that.. pls tell me.
>>>>>>>maybe tomorrow i will try amr_wb . i will keep you informed.
>>>>>>>
>>>>>>>NB : 3gp or mp4 generated by vlc doesn't play on the mobile phone on 
>>>>>>>local playback (possibly beacause of the lack of hinted tracks)
>>>>>>
>>>>>>Right, for local playback you need to hint the files. I used mp4box 
>>>>>>for hinting and got it work to play locally with mp4+aac and mp4+amr 
>>>>>>(both encoded with vlc). Don't remember if it worked with h263 video 
>>>>>>too, but i guess so.
>>>>>>
>>>>>>Good luck with the amr_wb stuff!
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