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

[Venkatasubramaniam R]

Hi,

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).

Thanks,
-Venkat.

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.
>>
>> http://www.bbc.co.uk/
>> This e-mail (and any attachments) is confidential and may contain personal
>> views which are not the views of the BBC unless specifically stated.
>> If you have received it in error, please delete it from your system.
>> Do not use, copy or disclose the information in any way nor act in
>> reliance on it and notify the sender immediately.
>> Please note that the BBC monitors e-mails sent or received.
>> Further communication will signify your consent to this.
>>
>> _______________________________________________
>> ffmpeg-user mailing list
>> ffmpeg-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>
>
>
>
> --
> 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
>