On Apr 15, 7:11 am, chuan <terr...@gmail.com> wrote:
> Dear Ravi:
> Thank so much for your quickly reply, as i am try hard to figure it
> out .
> Now i wish to share my plan and wish get help from you.
> 1. modify mp4 parer src code to support the audio codec(modify
> atomdefs.h sampledescriptionatom.h and some other .cpp).
> 2. modify mp4parser node code ,add audio codec type support.
> 3. use OpenCORE OMX-core to register my new omx component, add
> codec type or registration to omx related file.
> from above steps, i have some question:
> (1) as you know opencore version 1.x has a simpler omx component
> interface, but in 2.0 the interface is more complex, why? it make me
> to wrap the interface
> in cpp file.
Actually, I don't know this. I am not aware of any change of OMX
component interface. Can you please point me to an example?
> (2) and if i want use my own OMX-core (i'm going to do so), how
> can i do the job as you say? i read the omx intergrate doc, but i
> could not understand it fully.
Here is a thread where someone was able to do so.
http://groups.google.com/group/android-framework/browse_thread/thread/f449fc4dc16003de/.
Let us know if you still have questions.
> (3) today i try to get the pv log out to debug ,but failed to do
> so, as you know in version 1.x i can modify two head files and one cpp
> to get the log out, i have try to make with
> ENABLE_PV_LOGGING=1 and even try to modify some log related
> head files, but i got nothing. you know it cost a lot of time, and
> can't use log message to debug make me upset.
This should still work. Folks here have also been able to get logs
through this method. Let me see if I can patch up something to get the
logs more easily.
>
> looking forward for your reply expecial question(3) , thx!
>
> On Apr 15, 4:10 pm, Ravi <yend...@pv.com> wrote:
>
> > I don't know enough about QCELP to comment on how and if to modify the
> > mp4 parser. I can try to find out.
>
> > In general, the steps to add a new OMX codec would be:
> > (i) Add the required format, if not present, in pvmi/pvmf/include/
> > pvmf_format_type.h.
> > (ii) Add the mime type in the capability of PVMFOMXAudioDecNode()
> > or PVMFOMXVideoDecNode() [see the constructor].
> > if you are going to use the OpenCORE OMX-core ...
> > (iii) Register the component in the omx registry - codecs_v2/omx/
> > omx_common/src/pv_omxregistry.cpp.
> > or
> > if you are going to provide your own OMX-core ...
> > (iii) Have your OMX-core register this new component.
> > (iv) Have your OMX-core dynamically loadable.
>
> > Not sure about your build failures. Can you post snippets of
> > failures?
>
> > On Apr 14, 11:27 pm, chuan <terr...@gmail.com> wrote:
>
> > > Dear Ravi:
> > > question 1:
> > > if i want intergrate other audio codec in opencore 2.0 such as
> > > qcelp in 3gp/3g2 file, how can i modify mp4 parser to let it work?
> > > this audio codec omx components are perpared, new codec types are
> > > already define in pvmi\pvmf\include\pvmf_format_type.h, any where i
> > > can add this codec is added
> > > if you have any sugestion , pls let me knew
> > > question2:
> > > to enable looger i use cmd below
> > > rm -rf out/target/product/generic/obj/include/libpv
> > > make -j ENABLE_PV_LOGGING=1
>
> > > but i find it cannot compile through, a lot of killed appears, why?
>
> > > looking farward for your kindly reply.
>
> > > On Feb 27, 10:27 pm, rktb <yend...@pv.com> wrote:
>
> > > > It should be a new format in the existing container. Go through the
> > > > existing mp4 parser and try to understand how it is structured. We can
> > > > help you with specific questions.
>
> > > > Btw, I am assuming that you would be contributing this work back to
> > > > OHA community.
>
> > > > -Ravi
>
> > > > On Feb 27, 1:21 am, Lucien <loisen0...@gmail.com> wrote:
>
> > > > > Hi,
> > > > > Is there any documents,hints,or suggestions for me if I want
> > > > > to implement mp3 codec in mp4 ?
> > > > > How to start this work ?
> > > > > And is the effort hugeous ?
> > > > > In addition, does PV have plan or roadmap to support this
> > > > > functionality
> > > > > Thanks for your response
>
> > > > > On 2月24日, 下午9時13分, rktb <yend...@pv.com> wrote:
>
> > > > > > Hi,
>
> > > > > > There is no special concern in supporting mp3 in mp4. It has not
> > > > > > been
> > > > > > done yet. OpenCORE currently supports 3gpp fileformats in it's mp4
> > > > > > parser.
>
> > > > > > -Ravi
>
> > > > > > On Feb 23, 7:10 am, Andy Quan <androidr...@gmail.com> wrote:
>
> > > > > > > Ravi,
> > > > > > > Is there any special concern about not supporting MP3 in MP4
> > > > > > > format? I mean
> > > > > > > whether there are any legal issues or is this simply a technical
> > > > > > > issue? It
> > > > > > > seems MP3 held by MP4 is not a corner case.
>
> > > > > > > On Sat, Feb 14, 2009 at 12:15 AM, rktb <yend...@pv.com> wrote:
>
> > > > > > > > On Feb 13, 4:34 am, Lucien <loisen0...@gmail.com> wrote:
> > > > > > > > > Dear all :
>
> > > > > > > > > I have some problems to consult
>
> > > > > > > > > First,
> > > > > > > > > Can music player list a music file with amr-wb codec
> > > > > > > > > in 3gp
> > > > > > > > > file
> > > > > > > > > format ?
> > > > > > > > > I have tried to push a test file(only audio with
> > > > > > > > > amr-wb codec
> > > > > > > > > in 3gp) into
> > > > > > > > > sdcard , but music player list didn't show it
> > > > > > > > > In addition , when I used browser to connect a web
> > > > > > > > > server, I
> > > > > > > > > can download
> > > > > > > > > the test file but still can't play it
> > > > > > > > > Moreover, if the video part of the test file(.3gp) is
> > > > > > > > > encoded
> > > > > > > > > with h.263 and
> > > > > > > > > audio encoded with amr-wb codec, the media player can
> > > > > > > > > display
> > > > > > > > > without audio
> > > > > > > > > output.
> > > > > > > > > What is the problem of this issue ?
>
> > > > > > > > I tried playing 3gp files with amr-wb encoded data. It works
> > > > > > > > for me.
> > > > > > > > You need to file a bug with your specific clip so that somebody
> > > > > > > > can
> > > > > > > > take a look at it.
>
> > > > > > > > > Second problem,
> > > > > > > > > Can music player play a music file encoded with mp3
> > > > > > > > > codec in
> > > > > > > > > mp4 file
> > > > > > > > > format ?
>
> > > > > > > > OpenCORE currently doesn't support mp3 codec in a mp4 container.
>
> > > > > > > > > At last, opencore 2.0 have been released.
> > > > > > > > > Are those two issues supported?
>
> > > > > > > > > Thanks!!
>
> > > > > > > > > Best regards,
> > > > > > > > > Lucien
>
> > > > > > > --
> > > > > > > Thanks,
> > > > > > > Andy- 隱藏被引用文字 -
>
> > > > > > - 顯示被引用文字 -- Hide quoted text -
>
> > > > - Show quoted text -- Hide quoted text -
>
> > - Show quoted text -
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