[Ffmpeg-devel] Capturing every keyframe from a DVD

[Måns Rullgård]

Rich Felker <dalias at aerifal.cx> writes:

> On Mon, Jun 13, 2005 at 04:50:06PM +0200, M?ns Rullg?rd wrote:
>> Clayton Brown <clayton.brown at digitalrum.com> writes:
>> 
>> > Does anyone know how to save every keyframe from a DVD into a format
>> > such as JPG/TIFF etc.
>> 
>> Extract the video stream, and send it through an AVParser.  Discard
>> any non-I frames, and decode the I frames using libavcodec as usual.
>> Save the decoded frames to separate images using your favorite library
>> for your format of choice (libavcodec/libavformat handles some of
>> them).
>
> Actually there should be a way to convert mpeg1(/2/4?) keyframes into
> jpeg files losslessly without decoding and reencoding, shouldn't
> there? :)

Probably, but libavcodec certainly doesn't do it.  There are also some
color space issues.

-- 
M?ns Rullg?rd
mru at inprovide.com