[gst-devel] Can't play raw YV12 file

[Stefan Kost]

hi,

raw yuv files can't be played easily as the framesize is unknown. One  
thing that works is
gst-launch filesrc location=file.yuv blocksize=38016 !  
video/x-raw-yuv,format='(fourcc)'I420,width=176,height=144,framerate='(fraction)'15/1 !  
xvimagesink

blocksize is: w*h*1.5
> echo "176*144*1.5" | bc
38016.0

Stefan

Quoting Florent THIERY <florent.thiery at partycast.eu>:

> Hello,
>
> I hope this is the right place to ask...
>
> I am trying to take a raw yuv file into gstreamer. With playbin
> (gst-launch-0.10 playbin) element i get:
> ** Message: don't know how to handle application/x-yuv4mpeg,   
> y4mversion=(int)1
>
> What i don't get is that mplayer can read it ok:
> ==========================================================================
> Opening video decoder: [raw] RAW Uncompressed Video
> VDec: vo config request - 400 x 400 (preferred colorspace: Planar YV12)
> VDec: using Planar YV12 as output csp (no 0)
> Movie-Aspect is undefined - no prescaling applied.
> VO: [xv] 400x400 => 400x400 Planar YV12
> Selected video codec: [rawyv12] vfm: raw (RAW YV12)
> ==========================================================================
>
> And the gst-ffmpeg plugin seems to be here:
> $ gst-inspect-0.10 | grep y4m
> ffmpeg: fftype_yuv4mpegpipe: y4m
>
> I looked for documentation about how to use gst-ffmpeg without
> success. Could anyone point me to how to specify the right options
> (without relaying on the autodetection), once i'll get it playing it
> will be much more easier...
>
> I can provide a file sample if needed.
>
> Thanks a lot
>
> Florent
>
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