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.
(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.
(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.
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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