Conversion error from 1080p to 720p with Svt-Av1

[ignace72]

Hello everyone.
Normally with all my videos it works, but one of them crashes.
I use the following command:

ffmpeg -i video.1080p.mkv -map 0:v:0 -pix_fmt yuv420p10le -vf scale=1280:-1 -f yuv4mpegpipe -strict -1 - | SvtAv1EncApp -i stdin --preset 6 --keyint 240 --input-depth 10 --crf 30 --rc 0 --passes 1 --film-grain 0 -b av1.ivf

And now it tells me:

Failed to read proper y4m frame delimeter. Read broken

.
However, if I tell it to convert without changing the resolution, it works.
Does anyone have an idea?
Thanks.
Ignace.

[jagabo]

Change vertical scale to -2 or -4.

[ignace72]

Hello, jagabo.
Okay, I'll try that.
For now, I have an encoding in progress but I promise, I'll test after.
Thanks for your quick and accurate answer.
Ignace.

[ignace72]

I changed the vertical scale to -2 and it works perfectly.
Thanks a lot.
Ignace.

[jagabo]

You should almost never use -1 for the width or height. YV12 video can't have odd value widths or heights. And some players can't handle mod 2. I stick with mod 4.

[ignace72]

So if I set the value -4, it will pass all the time.
Good to know.
For players, I use Smplayer with MPV engine as main player and VLC to check my conversions while encoding.
Thank you.
Ignace.