[gst-devel] Huffyuv encoding problems

[Julien Isorce]

2009/8/20 Greg Logan <greg.logan at usask.ca>

> Hi List,
>
> I'm having trouble getting valid encodes from the ffenc_huffyuv plugin
> for one of my two encoding devices.  The two devices are a Hauppauge PVR
> 500 card (which works fine) and an Epiphan VGA2USB capture device (which
> does not).
>
> The pipeline I'm using for the Epiphan card is the following:
>
> sudo gst-launch -e v4lsrc device=/dev/video2 ! ffmpegcolospace !
> ffenc_huffyuv ! avimux ! filesink location=test.avi
>
> which generates a file like http://aries.usask.ca/test.avi.  Note that
> I've been having trouble getting the files to play on linux, but the
> latest version of VLC on windows works.
>
> If you can't see the contents of that video it's looks like the bottom
> 1/3 of the video is pieces (~20 pixels high) of the top 2/3 repeated and
> color shifted.  The odd thing is the other encoders (x264enc,
> ffenc_mpeg2video) work fine with this device - it's just the Huffyuv
> plugins.
>
> Does anyone know what's causing this?  Or better yet, how to go about
> fixing it?


Hi,

I can see that the resolution is 1024*768

So try to increase buffer size:

ffenc_huffyuv buffer-size=2000000

(default is 524288 using gst-inspect-0.10 ffenc_huffyuv)

Note that normally, using ffenc_ljpeg the result file has a smaller size.
(then use ffedc_ljpeg to decode)


>
> Thanks,
> G
>
>
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