[FFmpeg-user] vpxenc-vp9 row-mt

Moritz Barsnick barsnick at gmx.net
Sat Oct 21 18:47:58 EEST 2017


On Sat, Oct 21, 2017 at 16:15:04 +0200, Szucsik Gy├Ârgy wrote:
> Hello,
> 
> I understand that row-mt has been implemented into ffmpeg with this patch:
> https://patchwork.ffmpeg.org/patch/2745/
> 
> However, I build ffmpeg and it doesn't show up in the options, not even in
> -h full. If I'm not mistaken (by looking at libvpxenc.c), this has to be
> enabled during compile time. How can this be done without modifying the
> source code? Did I just stumble upon a bug?

This feature depends on an implementation in libvpx, which was
introduced there in February, but hasn't been included in a release of
theirs yet:
https://github.com/webmproject/libvpx/commit/5881601488ef4278d7ca2b06e2ad4d44b3063620

The named ffmpeg patch checks for availability/advertisement of this
feature when building.

> Also, there seems to be a mix of row-mt and row_mt in the source which is a
> bit confusing. Please advise.

What do you mean? Feel free to quote a line (refer to a proper version
of the file though).

Moritz


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