Audio delay before handover to codec (1 Viewer)

[sepp776]

Hey there,

I was wondering whether it is possible to generate an audio delay inside Mediaportal before the audio stream is handed over to the audio codec. Currently I have to let my audio codec decode the signal, add a delay and then encode it to AC3 again, which causes video stuttering sometimes.
Maybe there is an option to add a delay in the TS synchronization process already?

Best regards,
Sepp.

 

[Yami_Bas]

I had the same problem it is possible you can find an option in FFDShow Audio decoder that will enable you to delay the audio by a few ms (+ and -). You can also use AC3Filter to achieve the same . I myself use SAF in combination with AC3Filter

 

[sepp776]

you are right. I was actually using AC3Filter, but it caused some stuttering due to the de- and encoding that is required to be able to use the delay option.
I was hoping that the de- and encoding would not be required when adding the delay in a very early step of the stream processing, i.e. the demux process.

 

[Yami_Bas]

Well I don't know if this is the best possible solution but you can offset the audio track with x milliseconds en dan mux them together again (MKVMerge is a nifty tool for that). Hoped it helped.

 

[sepp776]

hm, this sounds very interesting. MKVMerge itself will not help as it is a command line tool dealing with complete files. I would need something that can be included in Mediaportal.
But at least it seems to be possible to do such data processing. Maybe someone can look into this?

 

[Yami_Bas]

Umm mkvmerge als has a GUI to make your problem a bit simpler
You can download it here:
mkvtoolnix -- Matroska tools for Linux/Unix and Windows

Hoped it helped a little