[libbluray-devel] JRE for Android part 3

[Vitor Dall'Acqua]

This problem is true for every disc, regular or uhd.
Since the shield is doing all the hard work with software rendering the
entire menu becomes slow.
But this isn't perceptible with the shield on 1080p because it has the
power to render it and display the menu.

Both cases you present might be the reason for that.

But I would say that the missing ts packets have a higher chance of being
the one.

The good news is that I tried several regular blurays and everything plays
just fine.

This is probably the last step we have to work with, after that is just
preparing for release.

Also, Petri, do you think you could share the changes you made on JRE to
allow it to run without JAVA_HOME?

And did you create a make file to compile it? Or did it by hand?

And finally, the changes needed on libbluray are just a few lines of code
on bdj.c.
Do you think a #ifdef android would be a good idea?

I believe that even VLC could play full disks on Android too.


On Sat, Jan 30, 2021, 1:58 PM Petri Hintukainen <
phintuka at users.sourceforge.net> wrote:

> la, 2021-01-30 kello 18:27 +0200, Shaya Potter kirjoitti:
> > On Sat, Jan 30, 2021 at 12:14 AM Vitor Dall'Acqua <veggav at gmail.com>
> > wrote:
> > > Nailed it
> > > 2021-01-29 20:07:07.860 T:13984    INFO <general>:
> > > CBitstreamConverter::Open Invalid hvcC
> > > 2021-01-29 20:07:07.862 T:13984   ERROR <general>:
> > > CDVDVideoCodecAndroidMediaCodec:: Failed to create Android
> > > MediaCodec
> > > 2021-01-29 20:07:07.863 T:13984    INFO <general>:
> > > CDVDVideoCodecFFmpeg::Open() Using codec: HEVC (High Efficiency
> > > Video Coding)
> > >
> >
> > have you tried it without the jvm and does it initiate the hardware
> > cosdec correctly?  and therefore play the uhd fine?  (i.e. by using
> > kodi just to select a title/playlist)
>
> Yes, could check that too (or even playing directly the problematic
> .m2ts file). I remember there was an issue where few first ts packets
> were skipped. That could cause issues while initializing HW codec ?
>
> > the fact that it works well with regular blurays, but not UHD, makes
> > me wonder if kodi is initiating the hevc hardware codec incorrectly
> > for the UHD bluray or if the hevc codec doesn't support a mode it
> > needs if its going to have to "draw over" the screen, while the AVC
> > codec does.  Dont know anything about android and built in codecs and
> > their capabilities, so just thinking out loud about what could be the
> > differences.
>
> Maybe HW codec is disabled intentionally ? Vitor, you mentioned
> something about DVD menus earlier. Could it be HW decoding in menus is
> disabled because of DVD/MPEG2 still images ?
> BluRay menus usually use background video, so this is not needed. Those
> few that use still images should be easy to detect from playlist
> metadata.
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> > libbluray-devel at videolan.org
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>
>
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