[FFmpeg-user] using -vtag on input files

[Roee Kashi]

first, since my rawvideo input is YV12 and there's no such pix_fmt, yuv420p
without vtag results with a blue-pink video output.
second, before vtag supported input files, i had to convert the file first
to avi with -vcodec copy, and then convert it to mpeg4 or something, which
takes forever.

i think this thread could shed some light on this matter (last message is
the most important i think):
http://ffmpeg-users.933282.n4.nabble.com/convert-YV12-stream-to-ProRes-td4665890.html

Roee.

2015-04-02 17:53 GMT+03:00 tim nicholson <nichot20-at-yahoo.com at ffmpeg.org>:

> On 02/04/15 15:22, Roee Kashi wrote:
> > Hi,
> >
> > with the older ffmpeg version (described earlier), my command line looks
> > like this:
> > "ffmpeg.exe -f rawvideo -vcodec rawvideo -s 704x576 -r 25 -pix_fmt
> yuv420p
> > -vtag YV12 -i raw.yuv -f avi -qscale 0 out.avi"
>
> Ahh, so you are using the pix_fmt to specify the input...
>
> What happened on the older version if you left the -vtag off? I think
> its always only been an output only option, and istr a patch to fail
> options put in the wrong place.
>
> What happens if you move the option to the output side on a current build?
>
> >
> > with newer version, the output of the same command is:
> > [...]
>
>
> --
> Tim.
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