[FFmpeg-user] converting 1080 to 720 mpeg2

[Andy Sheen]

On 29 February 2012 05:21, Ian Evans <dheianevans at gmail.com> wrote:

> On Tue, Feb 28, 2012 at 9:51 PM, Ian Evans <dheianevans at gmail.com> wrote:
> > It looks great! Is that the proper yadif line to deinterlace it? Gotta
> > figure out how to get the audio track(s) over as well.
>
> Duh...okay just realized I need to drop the -an.
>
> So I did the 10 minute test and it looks good.
>
> Do I run the same command line on the 720 file as well to make sure
> it's the same as the 1080 one?
>
>
What does ffprobe (or similar) say the  file formats are now. I think
specifying the yadif=1 will give 1 frame for every field which would give
you 59.99 fps, but you've probably overriden that with the -r line.

Basically, you need to get the two files with exactly the same size, same
rate (which will be ~60fps), same interlacing (i.e. none as the 720 is
progressive)

You should be able to get the 1080i file in the same format as the 720p
file. You shouldn't need to transcode the 720p file.

Andy