[Ffmpeg-devel] [ bug ] converting png to dv gives solid black
Mon Mar 13 20:32:53 CET 2006
Erik Slagter <erik at slagter.name> writes:
> On Mon, 2006-03-13 at 14:28 +0000, M?ns Rullg?rd wrote:
>> > I am sure conventional analogue TV sets can display 30 fps
>> > equally well as 30000/1001 fps.
>> The reason for using 30000/1001 fps remains as long as NTSC TV sets are in use.
>> If 30 fps is used the chroma and audio subcarriers can beat at a multiple of
>> the horizontal scan frequency causing stationary dots in the picture. If
>> the scan rate is lowered slightly these dots will move around and become less
>> visible. Then again, maybe modern electronics have better separation of the
>> signals and would cope with 30 fps; I don't know.
> I was thinking of a digital set top box connected properly using a scart
Do you call scart proper? No, let the French keep that silly
invention along with SECAM. A scart input has pins for some selection
of RGB, composite and svideo, but never all since they share some
pins. If your STB happens to use a different flavor of scart than
your TV you'll end up with a B/W picture or even worse things.
> or component cable. No subcarriers applicable then :-) Luckily having an
> analogue TV set doesn't force you to use legacy technology ;-)
I consider any analog connection a legacy technology.
mru at inprovide.com
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