The VideoLAN Forums

Posted: **27 Aug 2015 08:42**

Hi EveryOne:

Hi,I am programmer from China, rencently, I just have a problem with VLC API usage in VLC SDK. I cannot found anything useful information in the Document.

I have Requirement in my software as follows:
Implement the feature of recording RTSP stream into Video file like .avi , .mp4 file and so forth.

I cannot find any Demo about this in VLC SDK. So, I just go and read/track the VLC Media Player source this Bigger Project, the UI of this software wrote in Qt, and some features wrote in a set of VLC APIs. I found the feature of converting A RTSP stream into video file just implemented by calling A function named playlist_AddExt(It is a VLC API in SDK) in "modules\gui\qt4\recents.cpp" as follows:

Code: Select all

int Open::openMRLwithOptions( intf_thread_t* p_intf,
                     const QString &mrl,
                     QStringList *options,
                     bool b_start,
                     bool b_playlist,
                     const char *title)
{
    /* Options */
    const char **ppsz_options = NULL;
    int i_options = 0;

    if( options != NULL && options->count() > 0 )
    {
        ppsz_options = new const char *[options->count()];
        for( int j = 0; j < options->count(); j++ ) {
            QString option = colon_unescape( options->at(j) );
            if( !option.isEmpty() ) {
                ppsz_options[i_options] = strdup(qtu(option));
                i_options++;
            }
        }
    }
	

    /* Add to playlist */
    int i_ret = playlist_AddExt( THEPL,
                  qtu(mrl), title,
                  PLAYLIST_APPEND | (b_start ? PLAYLIST_GO : PLAYLIST_PREPARSE),
                  PLAYLIST_END,
                  -1,
                  i_options, ppsz_options, VLC_INPUT_OPTION_TRUSTED,
                  b_playlist,
                  pl_Unlocked );

    /* Add to recent items, only if played */
    if( i_ret == VLC_SUCCESS && b_start && b_playlist )
        RecentsMRL::getInstance( p_intf )->addRecent( mrl );

    /* Free options */
    if ( ppsz_options != NULL )
    {
        for ( int i = 0; i < i_options; ++i )
            free( (char*)ppsz_options[i] );
        delete[] ppsz_options;
    }
    return i_ret;
}

And This is My code referred to above code as follows:

Code: Select all

	intf_thread_t * p_this = (intf_thread_t *)GetWindowLongPtr((HWND)this->winId(), GWLP_HINSTANCE);

				

				QString transcode = "sout=#transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128,deinterlace}";
				QString outFile = "std{access=file{overwrite},mux=avi,dst=D:/--please stay polite--.avi}";
				QStringList optionList;

				optionList.append(transcode);
				optionList.append(outFile);

				int i_options = 0;
				const char** ppsz_options = NULL;

				if (!optionList.isEmpty() && optionList.count() > 0)
				{
					ppsz_options = new const char *[optionList.count()];
					
					for (int j = 0; j < optionList.count(); j++) 
					{
						
						QString option = optionList.at(j);
						
						ppsz_options[i_options] = strdup(option.toStdString().c_str());
						i_options++;
						
					}
				}

				playlist_t *p_playlist = pl_Get(p_this);
				
				int i_ret = playlist_AddExt(p_playlist,
					m_url.toStdString().c_str(), m_url.toStdString().c_str(),
					PLAYLIST_APPEND | PLAYLIST_GO,
					PLAYLIST_END,
					-1,
					i_options, ppsz_options, VLC_INPUT_OPTION_TRUSTED,
					true,
					pl_Unlocked);

				if (i_ret == VLC_SUCCESS)
				{
					ui->record->setText("Recording");
					m_isRecording = true;
				}

so the problem comes to show, I cannot precisely figure it out ， I cannot use it precisely. the first agrument of this function playlist_t* created by what function? intf_thread_t* this varirable created by what function. I cannot find anything in VLC Media Player source (Maybe I am just a newbie for C/C++).

Could You Tell Me something Wrong in My code ? Or if you have some Demos of this , you can tell me where I can find? Or If you have better solution(use other APIs) to implement my requirement of converting(recording) RTSP stream into a video file? And How Can I stop the recording? just simply called this Stop function like this?

Code: Select all

void VLCPlayer::Stop()
{
	if (m_vlcPlayer)
	{
		libvlc_media_player_stop(m_vlcPlayer);
		libvlc_media_player_release(m_vlcPlayer);

		ui->play->setText("Play");

	}

	m_vlcPlayer = NULL;
}

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The VideoLAN Forums

A problem with VLC API called playlist_AddExt

A problem with VLC API called playlist_AddExt