[x264-devel] Re: Problems with PTS and b frames

[bond]

lo bill

are you saying x264's .mp4 output is not correct with b-pyramid? if yes can
you plz post the exact cmdl to use to reproduce this, cause in my tests x264
always produced the same pts/dts than mp4creator with any b-frame/pyramid
settings

cheers
bond

----- Original Message ----- 
From: "Bill May" <wmay at cisco.com>
To: <x264-devel at videolan.org>
Sent: Wednesday, December 21, 2005 7:25 PM
Subject: [x264-devel] Re: Problems with PTS and b frames


> Hi, again,
>
> A couple of days ago, I asked the below, in reference to the amount to add
> to the output.i_pts to get the correct PTS.
>
> Bill May wrote:
> > Is there a way to get max_reorder_buffer_size programmatically ?  It
looks
> > like p_mp4->i_init_delay is what I want - is that correct ?  It uses
> > p_param->i_bframe ? (p_param->b_bframe_pyramid ? 2 : 1) : 0.
>
> Without b frame pyramid, this works correctly.
>
> However with a b_frame_pyramid (set by:
>     m_param.i_bframe = 3;
> +  m_param.i_frame_reference = 5;
> +  if (m_param.i_bframe >= 2)
> +    m_param.b_bframe_pyramid = 1;
>
> the pts is not getting set correct.
>
> pts offsets: (should be values determined by mp4creator (Laurent's code)
>
> should be:      is:
> 12000         12000   (IDR-I)
> 30000         26400   (NIDR-P)
> 12000         12000   (NIDR-B)
> 0              1200   (NIDR-B)
> 6000           8400   (NIDR-B)
> 30000         30000   (NIDR-P)  ***
> 12000         12000   (NIDR-B)
> 0              1200   (NIDR-B)
> 6000           4800   (NIDR-B)
> 30000         30000   (NIDR-P)
> 12000         12000   (NIDR-B)
> 0              1200   (NIDR-B)
> 6000           4800   (NIDR-B)
> 30000         30000   (NIDR-P)
> 12000         12000   (NIDR-B)
> 0                 0   (NIDR-B)
> 6000           8400   (NIDR-B)
>
> repeats from *** above.
>
> Any idea ?
>
> Thanks, and happy holidays.
>
> Bill May
>
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