[FFmpeg-user] FFmpeg with bt 601 issue

[Mark Himsley]

On 27/04/2012 18:36, Belinda Mak wrote:
> Hi,
>
> I have a mov file which is not broadcast safe. I am looking
 > into making a m2v file with broadcast safe filter.
>
> Here is my command
>
> ffmpeg.exe -y -i "C:\tmp\709.mov" -top 1 -flags ildct+ilme
 > -vcodec rawvideo -r 29.97 -aspect 16:9 -b:v 11500k -minrate 11500k 
-maxrate 11500k -bufsize 1835k
 > -bf 2 -mbd rd -an -s 1920x1080 -pix_fmt yuv420p -profile 4 -level 4 
-vf colormatrix=bt709:bt601
 > "C:\tmp\ffmpeg-601.m2v"
>
>   The result file is still not boardcast safe.

What makes you think that a conversion from BT709 to BT601 will make you 
HD media (which really should be in BT709 colour space) broadcast safe?

I'm also very confused by your command line - most of your parameters 
don't appear to be logical for rawvideo video codec.

 > I couldn't find much info online. I know some people use avisynth
 > then ffmpeg. Is that the only way to do it?

-- 
Mark