yuv to y4m conversion for 4K ?

[Mourad AKLOUF]

hello !

I have troubles with converting 4k video from .yuv to .y4m , to use it
after that as input for Av1 encoder ;
I'm using mjpegtools and this is the commands :

cat Drums_3840x2160_100fps_10bit_420_jvet.yuv | ./yuv4mpeg -w 3840 -h 2160
-x 420mpeg2 -i p -r 100:1 > Drums_3840x2160_100fps_10bit_420_jvet.y4m
./yuvplay < Drums_3840x2160_100fps_10bit_420_jvet.y4m # this is for
palying

when i play the .y4m nothing appears which probably means bad conversion ,
however it works very fine with any CIF sequence. the problem i think is in
the bit-depth (10b) i couldnt find any way to put it as arg for the
converion.
do you know any other way to do the conversion ? and does the AV1 encoder
accept other extension besides .y4m as input ?

['Johann Koenig' via Codec Developers]

Post by Mourad AKLOUF
hello !
I have troubles with converting 4k video from .yuv to .y4m , to use it

after that as input for Av1 encoder ;

Post by Mourad AKLOUF
cat Drums_3840x2160_100fps_10bit_420_jvet.yuv | ./yuv4mpeg -w 3840 -h

2160 -x 420mpeg2 -i p -r 100:1 > Drums_3840x2160_100fps_10bit_420_jvet.y4m

Post by Mourad AKLOUF
./yuvplay < Drums_3840x2160_100fps_10bit_420_jvet.y4m # this is for

palying

Post by Mourad AKLOUF
when i play the .y4m nothing appears which probably means bad conversion

, however it works very fine with any CIF sequence. the problem i think is
in the bit-depth (10b) i couldnt find any way to put it as arg for the
converion.

Post by Mourad AKLOUF
do you know any other way to do the conversion ? and does the AV1 encoder

accept other extension besides .y4m as input ?

aomenc will accept .yuv files. You need to specify width, height, timebase,
and bitdepth:

--width=3840
--height=2160
--timebase= or --fps=
--bit-depth=10

i420 is the default, but if you want to encode something else like i444 you
need to specify that as well:
--yv12
--i420
--i422
--i444

[Mourad AKLOUF]

Thank you it works very good.
Do you know where i can find some documentation about the AV1 Codec , like
a user-manual and tools description( partitioning, prediction , entropy
coding ) ?!