[vlc-devel] File dumping for PSNR computation

[Kaarlo Räihä]

PSNR calculation should be possible even with missing frames (at least when we did PSNR calculation in Uni we randomly removed some packets using rtp_loss from JM Reference software to simulate errors and most of time we got PSNR from decoder). "previous frame can be redisplayed" approach is problematic if you lose your first frame (usually a I-frame), what are you going to display in that case?

Samir Selman kirjoitti 06.05.2008 kello 14:30:
> Hi,
> 
> I am streaming MPEG-2 video from a server to a client over RTP using
> MPEG/ts.
> The video at the client contains losses due to the channel. I need to
> calculate
> the quality(PSNR) of the received file wrt the sent file at the client,
> HOWEVER
> the received file at the client contains much less number of frames
>  than the
> original file which is not allowing me to compute PSNR correctly.
> 
> Does anyone know how I can make VLC use error concealment in a way that
> allows
> the final number of frames at the client to be the same as the
>  original file
> regardless of the losses on the channel? So for example if a frame
>  was lost
> on
> the channel the previous frame can be redisplayed and thus the total
>  number
> of
> frames will remain the same.
> 
> Thank you in advance for your help and I really hope you can help me in
> this.
> 
> Best Regards,
> 
> ~Samir Selman
> _______________________________________________
> vlc-devel mailing list
> To unsubscribe or modify your subscription options:
> http://mailman.videolan.org/listinfo/vlc-devel


...................................................................
Luukku Plus paketilla pääset eroon tila- ja turvallisuusongelmista.
Hanki Luukku Plus ja helpotat elämääsi. http://www.mtv3.fi/luukku