[FFmpeg-user] Regarding -pix_fmt yuvj422p for the output yuv file.

[Venkatasubramaniam R]

Hi Dave,

Thanks for the idea, and surely uyvy format is documented in a more detailed
manner. Thanks for the links, they are really helpful.

I chose yuvj422p because I have an original yuv video in the same format and
so I will be able to compare the original yuv with the modified yuv easily.

I will try with this uyvy format suggestion. If I come across any useful
ideas, I will post it in this mail chain.

Thanks again,
-Venkat.

On Thu, Jul 21, 2011 at 6:17 PM, Dave Bevan <dave.bevan at bbc.co.uk> wrote:

>
> >Hi,
>
> >First of all, I would like to thank the FFmpeg authors for the
> software. It has been a great help for my work.
>
> >I am currently using ffmpeg (version SVN-r23401) for my video encoding
> and decoding process. I have some mp4 files which I decode to yuvj422
> format for using the output yuv files for quality processing.
>
> >I am writing a c++ code to automate the processing of the yuv files,
> but I am completely not sure about the format in which the yuv pixels
> are stored..
>
> >Please let me know what would be the actual format structure of the yuv
> file byte stream when I use the '-pix_fmt yuvj422p' tag for decode the
> mp4 to yuv422 file. Whether it is YUV422 (progressive/interlaced,
> packed/planar).
> This would be of great help.
>
>
>
>
> Personally, I'd suggest using "-pix_fmt uyvy422" - it's documented at
> http://www.fourcc.org/yuv.php, and http://www.fourcc.org/yuv.php#UYVY in
> particular.
>
> --D.
>
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-- 
Regards,

Venkatasubramaniam Ramshankar,
Graduate Student - M.Sc Communication Engg
TU München.
(00.49.176.624.11480)
LinkedIn :
http://www.linkedin.com/pub/venkatasubramaniam-ramshankar/5/b7b/ab7