[x264-devel] Error when height not divisible by 2

[Ketil Froyn]

On Fri, May 28, 2010 at 1:01 AM, Jason Garrett-Glaser
<darkshikari at gmail.com> wrote:
> On Thu, May 27, 2010 at 3:42 PM, Ketil Froyn <ketil at froyn.name> wrote:
>> Hi,
>>
>> I'm trying to use ffmpeg with x264 to create some h.264 video clips
>> that are pretty small, just 144x81. When I try to create this with
>> ffmpeg, I get this error:
>>
>> [libx264 @ 0x8902d10]width or height not divisible by 2 (144x81)
>>
>> However, I am able to generate clips with those dimensions with
>> another commercial tool. Is there anything I can tune to get this to
>> work with ffmpeg/x264? Here's my ffmpeg command line:
>
> Such a resolution is not legal with YV12 in H.264.  There are only two
> legal ways to generate such a stream:
>
> 1) Add container-level cropping beyond the bitstream-level crop flag.
> No sane container should support non-mod2 cropping in YV12 either
> though.
> 2) Encode in 4:2:2, which x264 doesn't support (nor does ffmpeg's decoder).
>
> Dark Shikari

Thank you! It turns out that the commercial tool silently upscales to
146x82, but I wouldn't have guessed that before you told me this...
Sorry for the noise.

Cheers, Ketil