h264 encoding "divisible by 2"

Igors igors at eias3d.com
Sat Mar 30 15:40:14 UTC 2019

Hi All

My test pipleline is

gst-launch-1.0 videotestsrc num-buffers=100 ! videoconvert !
video/x-raw,width=640,height=480,format=YV12 ! x264enc ! qtmux ! filesink

It works fine but only for even image sizes, setting height=479 gives
x264enc error (height not divisible by 2). This restriction can be removed
if change format to Y444 (High Profile 4:4:4) but in this case the created
movies won't open with standard  video players (QT Player for example), and
it irritates user a lot.

After googling it looks like a standard prob, but other apps can do this.
e.g. create h264 files with odd sizes that are opened ok via standard
players. I compared caps for these and thouse files, both have profile
"high" 4:2:0 and all fields are same except of one

1) File with odd video size created in other app

2) File with even video size created with pipeline above

I've tried to specify codec_name in command line but it has no effect. Any
idea? Or I need other encoder instead of x264enc?


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