what's the best encoder for dvdauthor?

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"FFmpeg is probably the easiest tool nowadays for generating an MPEG file i=
n the right format:=20
just specify =E2=80=9C-target pal-dvd=E2=80=9D or =E2=80=9C-target ntsc-dvd=
=E2=80=9D, and it will preset all the appropriate options.=20
[...]
Mjpeg Tools has the best multiplexer around. Others will often throw warnin=
gs with dvdauthor.=20
It also has an mpeg2 video encoder."
(<http://dvdauthor.sourceforge.net/>)
And in a recent msg (18 Mar 2015) Lawrence D'Oliveiro wrote:
"Are you using FFmpeg?s ?-target pal-dvd? or ?-target ntsc-dvd? options?
I usually find this is enough to engage all the right encoding settings."


Well, ffmpeg/avconv is the fastest tools. But after some repetita dvdauthor=
 WARNings ("WARN: unknown mpeg2 aspect ratio 1"), I've tried some little ex=
periments.
I've some mixed material to put on a DVD structure with dvdauthor.
Some of these are clip from still images, that I've obtained fast and easy =
with:

convert xc:green -resize 720x576! greenframe.png
convert xc:black -resize 720x576! blackframe.png

avconv -loop 1 -f image2 -i blackframe.png -r 25 -t 30 -f dvd -target pal-d=
vd blackvideo.mpeg

When I take a look on these video, with mplayer -identify, I obtain
[...]
Movie-Aspect is 1.25:1 - prescaling to correct movie aspect.
ID_VIDEO_ASPECT=3D1.2500
[...]

and then, in dvdauthor  they generate that WARN.
On the contrary, when you use png2yuv + mpeg2enc + mplex (RFM <http://dvdau=
thor.sourceforge.net/doc/c3.html#AEN24>) to create the mpeg file

png2yuv -n 750 -I p -f 25 -j greenframe.png | mpeg2enc -f 8 -o greenvideo.m=
2v
mplex -f 8 -o greenvideo.mpeg greenvideo.m2v silence_30s.m2a

mplayer -identify say:
[...]
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
ID_VIDEO_ASPECT=3D1.3333
[...]
and dvdauthor  don't generate any WARN.

May I conclude that is better to prepare all mpeg files in the DVD with mjp=
egtools?
And then forget the simple and fast command to create DVD material:
(avconv -i any.avi -f dvd -format pal-dvd any.mpeg)?

Best regards,
enrico

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"FFmpeg is probably the easiest tool nowadays for generating an MPEG file i=
n the right format: <br>just specify =E2=80=9C-target pal-dvd=E2=80=9D or =
=E2=80=9C-target ntsc-dvd=E2=80=9D, and it will preset all the appropriate =
options. <br>[...]<br>Mjpeg Tools has the best multiplexer around. Others w=
ill often throw warnings with dvdauthor. <br>It also has an mpeg2 video enc=
oder."<br>(&lt;http://dvdauthor.sourceforge.net/&gt;)<br>And in a recent ms=
g (18 Mar 2015) Lawrence D'Oliveiro wrote:<br>"Are you using FFmpeg?s ?-tar=
get pal-dvd? or ?-target ntsc-dvd? options?<br>I usually find this is enoug=
h to engage all the right encoding settings."<br><br><br>Well, ffmpeg/avcon=
v is the fastest tools. But after some repetita dvdauthor WARNings ("WARN: =
unknown mpeg2 aspect ratio 1"), I've tried some little experiments.<br>I've=
 some mixed material to put on a DVD structure with dvdauthor.<br>Some of t=
hese are clip from still images, that I've obtained fast and easy with:<br>=
<br>convert xc:green -resize 720x576! greenframe.png<br>convert xc:black -r=
esize 720x576! blackframe.png<br><br>avconv -loop 1 -f image2 -i blackframe=
.png -r 25 -t 30 -f dvd -target pal-dvd blackvideo.mpeg<br><br>When I take =
a look on these video, with mplayer -identify, I obtain<br>[...]<br>Movie-A=
spect is 1.25:1 - prescaling to correct movie aspect.<br>ID_VIDEO_ASPECT=3D=
1.2500<br>[...]<br><br>and then, in dvdauthor&nbsp; they generate that WARN=
.<br>On the contrary, when you use png2yuv + mpeg2enc + mplex (RFM &lt;http=
://dvdauthor.sourceforge.net/doc/c3.html#AEN24&gt;) to create the mpeg file=
<br><br>png2yuv -n 750 -I p -f 25 -j greenframe.png | mpeg2enc -f 8 -o gree=
nvideo.m2v<br>mplex -f 8 -o greenvideo.mpeg greenvideo.m2v silence_30s.m2a<=
br><br>mplayer -identify say:<br>[...]<br>Movie-Aspect is 1.33:1 - prescali=
ng to correct movie aspect.<br>ID_VIDEO_ASPECT=3D1.3333<br>[...]<br>and dvd=
author&nbsp; don't generate any WARN.<br><br>May I conclude that is better =
to prepare all mpeg files in the DVD with mjpegtools?<br>And then forget th=
e simple and fast command to create DVD material:<br>(avconv -i any.avi -f =
dvd -format pal-dvd any.mpeg)?<br><br>Best regards,<br>enrico<br>
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