[Kdenlive-devel] Rendering interlaced video to HuffYUV

[jb]

On Friday 25 January 2013 09.04:35 Dan Dennedy wrote:
> On Fri, Jan 25, 2013 at 6:17 AM, Steven Boswell II <ulatekh at yahoo.com> 
wrote:
> >>> I'm getting the same problem with HuffYUV rendering -- my interlaced
> >>> video
> >>> ends up progressive.
> >>> To be fair, "ffmpeg -i input.yuv -vcodec huffyuv output.avi" also loses
> >>> my
> >>> interlaced flag (at least according to "ffmpeg -i output.avi -vcodec
> >>> rawvideo -f yuv4mpegpipe - | head -1").
> >>> I don't suppose this would be another quick, easy fix...?
> >>
> >>I looked into it a bit, and I am not sure what is going on.
> >>[...]
> >>
> >>If you can figure out
> >>ffmpeg command lines that show how to output interlaced huffyuv and
> >>verify it (preferably with ffprobe and not mediainfo's magic), that
> >>would help. Otherwise, I have something big I am working on for MLT at
> >>the moment and cannot give this much attention at this time.
> >>
> > I understand.  Thanks for looking so deeply into this!  At least you
> > verified that it's not an mlt/kdenlive bug.
> > I'll let you know if I can get any better results out of ffmpeg.
> > 
> > One thing I noticed in kdenlive is the "Advanced" tab in the "Properties"
> > window of the imported clips.  It says I can override various properties,
> > and I tried to turn off the "progressive" flag on my imported HuffYUV
> > clips, but it didn't seem to take.  However, if I hand-edit the .kdenlive
> > file, and change >>progressive="1"<< to >>progressive="0"
> > top_field_first="0"<<, then reload it in kdenlive, the Properties window
> > now says that the clip is interlaced.  Is this a valid workaround?  And
> > should the Properties window
> Perhaps not because there is a MLT portion of the XML document (the
> majority) and a kdenlive part. It is not using XML namespaces, but
> everything <kdenlivedoc> and below belongs to kdenlive. MLT's
> properties to override those things begin their name with a "force_":
> 
> http://www.mltframework.org/bin/view/MLT/ProducerAvformat#force_progressive
> 
> > have let me do this without hand-editing the file?
> 
> Yes, I noticed some quirkiness here as well. It seems I have to visit
> the dialog twice for it to take effect.

Should be better now with my last commit.

regards
jb