BTW, for those interested in transcoding files - this may be useful to you
(saves you looking for another tool to licensed codecs) -
http://www.asteriskguru.com/tools/audio_conversion.php
Cheers
Jason
On Thu, Dec 4, 2008 at 7:45 AM, Jason Penton <[EMAIL PROTECTED]>wrote:
> Hey Francesco
>
> Great! thanks.
>
> I am busy evaluating the best way to do this and will maybe run something
> through the list again.
>
> I assume you used the intel IPP sample app for creating g729 files? I
> managed to integrate the intel IPP g729 codec into SEMS as an exercise but
> we'd rather not pay G729 license and we'd also prefer not to have to
> transocde media on SEMS to save CPU. So ultimately we're looking at adding
> the precoded file Read and Write scenario. Lets see how far we get. Will be
> in touch with the list re. ideas, help, etc.
>
> Cheers
> Jason
>
>
> On Wed, Dec 3, 2008 at 7:41 PM, Francesco.giordano <
> [EMAIL PROTECTED]> wrote:
>
>>
>> Hi,
>>
>> I was working on the same problem as the one Jason mentioned, but I
>> managed to make it functioned. Basically, I started by the precoded_announce
>> application and I modified it a bit, in order to parse the input parameters
>> and let the user play an announcement more than one time. My file is a
>> precoded file in g729 format that the user can specify through its request.
>> Here is the most important function:
>>
>> void PrecodedDialog::onSessionStart(const AmSipRequest& req)
>> {
>> int current_payload=rtp_str.getCurrentPayload();
>> if ((current_payload == -1) && !m_payloads.empty()) {
>> current_payload = m_payloads[0]->payload_type;
>> }
>>
>> AmPlaylist* playlist = new AmPlaylist(this);
>> while(repeat--){
>> AmPrecodedFileInstance* file =
>> file_def->getFileInstance(current_payload, m_payloads);
>>
>> if (!file) {
>> ERROR("no payloadn");
>> }
>> if (!file || file->open()) {
>> ERROR("PrecodedDialog::onSessionStart: Cannot open filen");
>> dlg.bye();
>> setStopped();
>> return;
>> }
>>
>> rtp_str.setFormat(file->getRtpFormat());
>>
>> AmPlaylistItem* item = new AmPlaylistItem(file, NULL);
>> playlist->addToPlaylist(item);
>> }
>>
>> setOutput(playlist);
>> setReceiving(false);
>> }
>>
>>
>> I made use of a playlist in order to possibly repeat the file. I think
>> that the most difficult part is to retrieve the G729 files. I used a free
>> converter that intel has made available.
>>
>> In order to make it possible to manage other codecs as well, upon received
>> the INVITE and parsed the file name, my application tries to load files with
>> the same name as the specified one but with different extension, e.g.:
>> file.ul, file.al, file.g729. Maybe it's not that smart, but I wasn't able
>> to find out anything better.
>>
>> If it can be of any help, I can post my entire application, but I think
>> the most important part is the one I copied. Basically is what Stephan
>> suggested to me, when I asked him for the same problem.
>>
>> Hope it was helpful,
>>
>> Cheers,
>> - Francesco.
>>
>>
>>
>>
>>
>> --------- Original Message --------
>> Da: "Jason Penton" <[EMAIL PROTECTED]>
>> To: "Raphael Coeffic" <[EMAIL PROTECTED]>
>> Cc: "[email protected]" <[EMAIL PROTECTED]>
>> Oggetto: Re: [Semsdev] g729 native format
>> Data: 03/12/08 15:37
>>
>> Thanks Stefan, Raphael!
>>
>> I will see what I can come up with
>>
>> Cheers
>> Jason
>>
>> On Wed, Dec 3, 2008 at 4:32 PM, Raphael Coeffic <[EMAIL PROTECTED]> wrote:
>>
>>> Jason Penton wrote:
>>>
>>>> Hi Raphael,
>>>>
>>>> not sure what you mean by "WAV with g.729" but i was thinking of having
>>>> precoded files like default.g729 default.wav and depending on the codec
>>>> negotiated with each call the appropriate "bytestream" is served.
>>>>
>>>> The WAV format does not force the encoding of the bit stream. There are
>>> several encoding supported within the WAV format, among which is g729. At
>>> the moment, SEMS only supports WAV files with Ulaw, Alaw and PCM16 encoding.
>>> What you propose is indeed already included, but as Stefan pointed out,
>>> there are some bugs for codecs which are supported otherwise by SEMS.
>>>
>>> comments?
>>>>
>>>> p.s. could you elaborate on the existing "pre-coded announcements"
>>>>
>>> sems/trunk/apps/precoded_announce ;-)
>>>
>>> -Raphael.
>>>
>>>>
>>>> cheers
>>>> Jason
>>>>
>>>> On Wed, Dec 3, 2008 at 3:58 PM, Raphael Coeffic <[EMAIL PROTECTED] <mailto:
>>>> [EMAIL PROTECTED]>> wrote:
>>>>
>>>> Jason Penton wrote:
>>>>
>>>> Hi All,
>>>>
>>>> Would there be any merit adding a native g729 file format to
>>>> SEMS so that media can be streamed from the server without
>>>> having to license the g729 codec. I would be happy to work on
>>>> the code but was interested in what the guys like Stefan,
>>>> Raphael and the rest of the list think about such a feature?
>>>>
>>>> Do you mean WAV with g.729? We already have some kind of support
>>>> with the pre-coded announces, but supporting a wide deployed file
>>>> format would be better.
>>>>
>>>> -Raphael.
>>>>
>>>> cheers
>>>> Jason
>>>>
>>>> ------------------------------------------------------------------------
>>>>
>>>> _______________________________________________
>>>> Semsdev mailing list
>>>> [email protected] <mailto:[email protected]>
>>>> http://lists.iptel.org/mailman/listinfo/semsdev
>>>>
>>>>
>>>>
>>>>
>>>
>>
>>
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