Marwan Daar wrote:
On 11/11/2015 10:18 AM, Andy Furniss wrote:
Possibly because it did work but every video player by default
will assume limited range for yuv so stretch and not display
anything above/below the video levels. It will also be pot luck
whether by default you will get to see 10 bit 444 or whether the
player ends up converting it to 8 bit 420.
I'm using media player classic with madVR. It's configured for 10 bit
output and full range. More importantly, when I view the png file
using madVR, it renders perfectly (full range, and in 10 bit), which
leads me to believe the issue is with the encoded mp4 file, rather
than the madVR playback. I could be missing something critical here,
though. Perhaps the decoding requirements for a png and an mp4 file
are dissociated in such a way that 10 bit playback is respected for
one but not the other. I really don't know. I'll look into imagemagic
and see if I can get any more information.
OK, I don't know about windows software.
FWIW using your 1.png I can convert to full range yuv44410le and
back to png and the result is very similar to the master (=+1 on
the values as shown by imagemagic display).
That's very encouraging! Did you use Zeranoe's 10 bit build to do
this?
No, I am testing on Linux and was specifically looking at whether it was
possible to get full range working with 48 bit png -> yuv and back. I
didn't go as far as actually encoding with x264. If I had the only test
I would be able to do was get a screen dump (8/24 bit) of the output of
a player which would have made looking at numbers compared to the master
more difficult. Just because you are using 10bit the result of playing
will still be 8 bit as that's what most computer screens are.
This doesn't mean that 10 bit yuv is pointless as X bit rgb -> 8 bit yuv
and back looses loads of colours, so 10 bit yuv is better even if your
source is only 8 bit rgb.
p.s. I haven't been able to figure out what "le" vs "be" refers to
(e.g. yuv44410le). Do you know what it means?
little endian and big endian.
_______________________________________________
ffmpeg-user mailing list
[email protected]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user
