[FFmpeg-user] '-show_frames' is broken

[Paul B Mahol]

On Wed, Apr 3, 2024 at 6:10 AM Mark Filipak <markfilipak.imdb at gmail.com>
wrote:

> Dear Developers,
>
> Thank you for adding 'pkt_dts' and 'pict_type' to '-show_frames'. Those
> will make things easier.
> Now, could you fix it?
>
> '-show_frames' shows pts < dts.
>
> frames.frame.133975.pts=503957216      <-+ These are actually 3 frames
> frames.frame.133975.pkt_dts=503968477  <-+ apart in the wrong direction
> frames.frame.133975.pict_type="I"
>
> '-show_frames' shows pts < dts for ALL frames (all frames are in open
> GOPs).
>
> =====
>
> '-f framecrc' is correct I think -- I can't confirm because I can't parse
> M2TS.
>
>      dts         pts
> 0,  503945955,  503957216,     3753,   640646, 0x90f222e3, S=1,        1
>
> =====
>
> And '-vf showinfo' is now finding 6 DTS discountinuities instead of 165.
> (But I don't believe there are any DTS discountinuities.)
>
> =====
>
> Is the problem with 'show_frames' and '-vf showinfo's due to something
> more internal, more basic?
> Could it explain why I'm having so much trouble with cutting & joining?
>
> I reckon the issue is with open GOPs. I hope that's all.
>
> Regards,
> Mark.
>
> PS: You know, when you change/fix something, it would be nice to tell us.
> That way we could all work
> together to test/validate the code and track bugs.
>

Sure, in mean time we will consume thin air to stay alive.


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