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

Venkatasubramaniam R kct.venkat at gmail.com
Mon Jul 25 11:34:18 CEST 2011


The '-pix_fmt uyvy422' idea worked out well. Now I am able to properly
process the YUV files. Thanks a lot for reply.

(If anyone is interested in a code example to process uyvy422 format,
checkout the example C code in this link :
http://www.wotsit.org/list.asp?al=Y , authored by Scott Scriven).


On Thu, Jul 21, 2011 at 6:35 PM, Venkatasubramaniam R
<kct.venkat at gmail.com>wrote:

> 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.
> (
> LinkedIn :
> http://www.linkedin.com/pub/venkatasubramaniam-ramshankar/5/b7b/ab7

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