Mixing Audio and Video

[dchiaramello]

Hi all.

I just tried to mix Audio and Video (to make them play together at the same time), and noticed that it was not possible.

Using CVideoPlayerUtility and CMdaAudioPlayerUtility leads to CMdaAudioPlayerUtility stopping as soon as the video starts with a KErrDied error - even if both completed their initialization without error.

Well, nothing really surprising there, even if the Video is NOT containing any Audio data - but is there a way to achieve that using standard Symbian? Or do I have to "manually" insert the Audio in the Video and play only the Video?

Video is a mp4 file, and audio a .wav one. All that on Series60 2nd Edition phone.

Thanks for your attention,
Daniel

[symbianyucca]

have you tried to start playing video first, and then construting the audio player with higher priority and trying to play the sound. Was wondering if it would kill the video's audio player, thou it could also make the whole video playing to stop. Anyway, just one idea to try on.

yucca

[dchiaramello]

have you tried to start playing video first, and then construting the audio player with higher priority and trying to play the sound. Was wondering if it would kill the video's audio player, thou it could also make the whole video playing to stop. Anyway, just one idea to try on.

yucca

The whole Video stops, with a KErrSessionClosed error...

So, if both have the same priority, the order of start has no importance: the Audio is not played, only the Video.
And if the Audio has an higher priority, the Video is not played

It was worth trying... Thanks.

Daniel

[S.S.Sudhakar]

Hi,

Today I faced the same problem. when I try to play video after audio play started i got the error KErrSessionClosed. Actually my video file doesn't contain any audio and I need to play video only after audio is started

the problem i am facing is with NOKIA 6630.

the same concept working well with NOKIA 6600.

Any clues why this is happening with NOKIA 6630 only.

Regards,
SSS

[dchiaramello]

Well...

In fact I was using a video file which HAD a sound track - an empty one, but it was present. That was the reason of my problems!

Now I am able to play both Video and Audio files simultaneously - even if I am faced to synchronization problems...

Daniel

[S.S.Sudhakar]

Hi Daniel,

Thanx for your reply.
Can you share how you are doing it.

Regards,
Sudhakar

[dchiaramello]

The principle is relatively simple:

- Create CVideoPlayerUtility and CMdaAudioPlayerUtility objects
- Call CVideoPlayerUtility::OpenFileL and CMdaAudioPlayerUtility::NewFilePlayerL
- On CVideoPlayerUtility::MvpuoOpenComplete, call CVideoPlayerUtility::Prepare
- On CVideoPlayerUtility::MvpuoPrepareComplete, WAIT FOR AUDIO TO BE COMPLETED TOO
- On CMdaAudioPlayerUtility::MapcInitComplete, WAIT FOR VIDEO TO BE COMPLETED TOO

When both are completed, I call CMdaAudioPlayerUtility::Play and CVideoPlayerUtility::Play, and I start a CHeartbeat to achieve synchronization

On CHeartbeat::Beat, I do the synchronization, using CVideoPlayerUtility::PositionL/SetPositionL and CMdaAudioPlayerUtility::GetPosition/SetPosition

All that seems well, except that I'm not satisfied by the synchronization...

Note that if the video contains an audio track, this will not work...

Daniel

[S.S.Sudhakar]

Thank you very much.

Sudhakar