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Steven_M_3
Beginner
78 Views

sample_vpp

I'm able to run sample_vpp on an rgb4 input file.  However,  whether I make the output file rgb4 (via the -dcc  option), or nv12  the output file is unplayable.  The program seems to execute correctly and a file is written.  However in GraphEdit the  file has GUID = GUID_NULL.  Is this by design?

Even if I make no changes  (i.e.  I don't use any of the options),  the file is still unplayable  and slightly shorter than the original file.  Are there some headers not written??

   mags

 

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3 Replies
Surbhi_M_Intel
Employee
78 Views

Hi Mags, 

I am able to get do color conversion with sample_vpp and able to play the o/p. I am using a YUV player to play the o/p with the help of changing the color option. 
There are few things I would like you to check 
1. Can you try any basic test like frame rate or denoising and see if you are able to play the o/p.
2. Please let me know what all changes you have made in the code and please send us your input. If it's too big, you can share it through syncplicity. 

Thanks,
-Surbhi

 

Steven_M_3
Beginner
78 Views

Hi:

   here is my command line

        sample_vpp.exe -lib hw -sw 640 -sh 480 -dw 640 -dh 480 -scc rgb4 -dcc nv12 -i a.avi -o nv12

  The nv12 file is created,  but I cannot play the file in any of the following programs:

       Window Media Player,  VLC, SourFourge's yuvplayer  (dated 6/27/2014)

   I made no modifications to sample_vpp, and in general the programs seems to work fine.  So perhaps the feature (i.e. to write headers to the created file) is not there by design?

   If you have a yuv file player you'd recommend (instead of SourFourge's) let me know.

   Mags

 

Surbhi_M_Intel
Employee
78 Views

Hi Steven, 

You can use ffplay to play a nv12 input. With this you can play yuv,rgb,nv12 file. 
To play nv12 format, use this cmd  "ffplay.exe -s wxh -pix_fmt nv12 out.yuv"
VLC, windows media player needs container to play a file, due to which you are not able to play nv12 o/p. 
Hope that will help.

Thanks,
-Surbhi

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