[FFmpeg-user] using -vtag on input files

tim nicholson nichot20 at yahoo.com
Thu Apr 2 18:32:39 CEST 2015

On 02/04/15 16:45, Carl Eugen Hoyos wrote:
> tim nicholson <nichot20-at-yahoo.com <at> ffmpeg.org> writes:
>>> "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
> It was definitely an input- and output-option.
> It is currently not possible to (easily) read 
> such streams.

So it was, I see you fixed it ages ago, sorry for causing confusion by

In oreder to make amends I think I have tracked the issue down....

It looks like the merge 5743095c line 3043 from avconv made it at output
only option...

needs an " OPT_INPUT | OPT_OUTPUT" instead of "OPT_OUTPUT"

> One possible work-around is of course to remux 
> to nut with (output) option vtag.
> Carl Eugen
> [...]

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