[FFmpeg-devel] Does FFplay support HEVC interlaced bitstream display?

[wm4]

On Tue, 1 Dec 2015 12:12:13 +0000
Andy Furniss <adf.lists at gmail.com> wrote:

> Fan Yingming wrote:
> > Hi, everyone.
> >
> > I noticed that HEVC support interlaced field encoding, but FFplay
> > didn't support HEVC interlaced bitstream display.
> >
> > We know FFplay play h264 interlaced bitstream perfectly.
> >
> > I'd like to know if FFplay support HEVC interlaced bitstream
> > display. And will FFmpeg support that?  
> 
> I don't think so.
> 
> It is possible to play hevc interlaced with ffmpeg via mpv but you'll
> have to set up your own filter chain and possibly adjust for field order.
> 
> I've done it on a homemade (libx265) test. libx265 only takes a certain
> field order and expects fields, plus interlaced support is (was) flagged
> as experimental. It did seem to work though, it was a while ago so this
> is just a paste from notes on the playback side - basically you need to
> weave the fields that the decoder outputs as weaved frames is what other
> decoders output.
> 
> mpv -fs --vf=lavfi=[tinterlace=merge,setsar=1/1,yadif=1] hevc-interl-5M.mkv

Exactly the same (without the lavfi wrapper of course) should work on
ffplay.

So does this mean the HEVC decoder outputs separate fields only? This
is really odd, although I can understand why.