As I read about altref frames they mayn't be used for display. Aren't
we wasting bandwidth by sending them. Equivalent bits can be
distributed to shown frame and PSNR can be increased.
What is the recommended frequency of sending altref? Is reference
encoder is generating altref frames?
The question of whether or not one is wasting bandwidth is based on how the alt-ref frame is generated and used for prediction of other frames. It is possible to increase bitrate if one inserts a alt-frame with not much information and which no other frame refers to. But in general a judicious use of alt-ref frame is intended to reduce the bitrate.
Recommended frequency - Depends on application, complexity and the content. And I think ref encoder can generate alt-ref frames.
On Thu, Apr 12, 2012 at 2:35 PM, vijay <vkumarban...@gmail.com> wrote: > Hello experts,
> As I read about altref frames they mayn't be used for display. Aren't > we wasting bandwidth by sending them. Equivalent bits can be > distributed to shown frame and PSNR can be increased.
> What is the recommended frequency of sending altref? Is reference > encoder is generating altref frames?
> Thanks in advance, > Vijay.
> -- > You received this message because you are subscribed to the Google Groups > "WebM Discussion" group. > To post to this group, send email to webm-disc...@webmproject.org. > To unsubscribe from this group, send email to > webm-discuss+unsubscr...@webmproject.org. > For more options, visit this group at > http://groups.google.com/a/webmproject.org/group/webm-discuss/?hl=en.
-- Rajesh Pamula Post Graduate Student Analogue and Digital Integrated Circuit Design Imperial College London. Residence Phone: +44-20-78522056
> The question of whether or not one is wasting bandwidth is based on how the
> alt-ref frame is generated and used for prediction of other frames. It is
> possible to increase bitrate if one inserts a alt-frame with not much
> information and which no other frame refers to. But in general a judicious
> use of alt-ref frame is intended to reduce the bitrate.
> Recommended frequency - Depends on application, complexity and the content.
> And I think ref encoder can generate alt-ref frames.
> Best regards,
> rajesh
> On Thu, Apr 12, 2012 at 2:35 PM, vijay <vkumarban...@gmail.com> wrote:
> > Hello experts,
> > As I read about altref frames they mayn't be used for display. Aren't
> > we wasting bandwidth by sending them. Equivalent bits can be
> > distributed to shown frame and PSNR can be increased.
> > What is the recommended frequency of sending altref? Is reference
> > encoder is generating altref frames?
> > Thanks in advance,
> > Vijay.
> > --
> > You received this message because you are subscribed to the Google Groups
> > "WebM Discussion" group.
> > To post to this group, send email to webm-disc...@webmproject.org.
> > To unsubscribe from this group, send email to
> > webm-discuss+unsubscr...@webmproject.org.
> > For more options, visit this group at
> >http://groups.google.com/a/webmproject.org/group/webm-discuss/?hl=en.
> --
> Rajesh Pamula
> Post Graduate Student
> Analogue and Digital Integrated Circuit Design
> Imperial College London.
> Residence Phone: +44-20-78522056- Hide quoted text -
Are you talking about live streaming over network? I do not know if
there was some changes, but alt-ref frames are generated only on two
pass encoding.
On Thu, Apr 12, 2012 at 8:14 AM, fishor <lexa.fis...@gmail.com> wrote: > Are you talking about live streaming over network? I do not know if > there was some changes, but alt-ref frames are generated only on two > pass encoding.
> -- > You received this message because you are subscribed to the Google Groups "WebM Discussion" group. > To post to this group, send email to webm-disc...@webmproject.org. > To unsubscribe from this group, send email to webm-discuss+unsubscr...@webmproject.org. > For more options, visit this group at http://groups.google.com/a/webmproject.org/group/webm-discuss/?hl=en.
