Avisynth crop caused weird Aspect Ratio

[pooksahib]

Hi. I indexed the VOBs within a VIDEO_TS file with MeGUI (DGDecode) and left the DAR at 6480:4739. Due to a little bit of black line either side, I added 'crop(2, 0, -2, 0)'. The resulting file was very wide and very short with mediainfo saying 21.258 (as opposed to 1.333). Removing the crop instruction gave me a normal output.

Any idea what happened here? Thank you

[KarMa]

Post the script

[pooksahib]

# Set DAR in encoder to 6480 : 4739. The following line is for automatic signalling
global MeGUI_darx = 6480
global MeGUI_dary = 4739
LoadPlugin("E:\MeGUI\tools\avisynth_plugin\NicAudio.dll")
LoadPlugin("E:\MeGUI\tools\dgindex\DGDecode.dll")
a=DGDecode_mpeg2source("E:\VIDEO_TS\VTS_01_1.d2v")
b=NicAC3Source("E:\VIDEO_TS\VTS_01_1 T81 2_0ch 192Kbps DELAY 0ms.ac3")
audiodub(a,b)
crop(2, 0, -2, 0)
#Spline36Resize(712,480) # Spline36 (Neutral) ### THIS RESIZE WAS AUTO DONE BY MEGUI BUT I DIDN'T USE IT.  ORIG SIZE IS 720x480


a=loop(70,3328,3328).trim(3328,3328+69).amplify(0).fadein0(30).QTGMC(FPSDivisor=2)++trim(3328,9848).amplify(2).fin(60).fout(80).QTGMC(FPSDivisor=2)
a++loop(370,9848,9848).trim(9848,9848+369).amplify(0).fadeout0(30).QTGMC(FPSDivisor=2)

[LMotlow]

# Set DAR in encoder to 6480 : 4739. The following line is for automatic signalling
global MeGUI_darx = 6480
global MeGUI_dary = 4739
LoadPlugin("E:\MeGUI\tools\avisynth_plugin\NicAudio.dll")
LoadPlugin("E:\MeGUI\tools\dgindex\DGDecode.dll")
a=DGDecode_mpeg2source("E:\VIDEO_TS\VTS_01_1.d2v")
b=NicAC3Source("E:\VIDEO_TS\VTS_01_1 T81 2_0ch 192Kbps DELAY 0ms.ac3")
audiodub(a,b)
crop(2, 0, -2, 0)
#Spline36Resize(712,480) # Spline36 (Neutral) ### THIS RESIZE WAS AUTO DONE BY MEGUI BUT I DIDN'T USE IT.  ORIG SIZE IS 720x480


a=loop(70,3328,3328).trim(3328,3328+69).amplify(0).fadein0(30).QTGMC(FPSDivisor=2)++trim(3328,9848).amplify(2).fin(60).fout(80).QTGMC(FPSDivisor=2)
a++loop(370,9848,9848).trim(9848,9848+369).amplify(0).fadeout0(30).QTGMC(FPSDivisor=2)

Avisynth didn't cause a weird asopect ratio. You did. You told Avisynth what to do.
But, really, it's amazing the clever ways people create to ruin digital video. I'm impressed.

[pooksahib]

I take it you've identified a scripting error that I've not seen but aren't prepared to tell me. Why would you waste your own time creating a post, then?

[KarMa]

Avisynth didn't cause a weird asopect ratio. You did. You told Avisynth what to do.
But, really, it's amazing the clever ways people create to ruin digital video. I'm impressed.

Wtf, just spit it out. As I don't see anything that would cause a AR of 1:21.258

@OP, I'm not really sure what is going on besides the mediaplay you are using is interpreting the DAR wrong. Maybe try muxing it through mkvmerge and select the DAR you want before muxing a new .MKV.

[pooksahib]

Thanks for that, KarMa. Cropping 2 from either side gave me that squashed down result as I mentioned above. As an experiment, I tried cropping different values but odd things still happened. I've just left it uncropped - no big deal as the black bits are so small anyway. If there's one thing I've learned since I began video editing it's that there's often all sorts of weirdness involved...

[sneaker]

Post the MeGUI log. Like the others said the AviSynth script itself doesn't point to 1:21:258.

[SaurusX]

Avisynth didn't cause a weird asopect ratio. You did. You told Avisynth what to do.
But, really, it's amazing the clever ways people create to ruin digital video. I'm impressed.

I read the comment before looking at the name and somehow I knew.

[pooksahib]

Log as requested. The source is VOB (720x480) and my script was a simple one, something I've done many times before:

# Set DAR in encoder to 6480 : 4739. The following line is for automatic signalling
global MeGUI_darx = 6480
global MeGUI_dary = 4739
LoadPlugin("E:\Free\MeGUI\tools\avisynth_plugin\NicAudio.dll")
LoadPlugin("E:\Free\MeGUI\tools\dgindex\DGDecode.dll")
a=DGDecode_mpeg2source("E:\VTS_01_5.d2v")
b=NicAC3Source("E:\VTS_01_5 T81 2_0ch 192Kbps DELAY -24ms.ac3")
audiodub(a,b)
crop(2, 0, -2, 0)
#Spline36Resize(656,440) # Spline36 (Neutral)## COMMAND PURPOSELY DEACTIVATED BY ME
trim(1000,1300)

It'd be interesting to see if the log reveals why I get a squashed video.. Thanks for looking.

[Nilzzon]

remux it and set it to 16:9 or whatever the source is

sar get set --sar 64205:70041

Because of this?

# Set DAR in encoder to 6480 : 4739. The following line is for automatic signalling
---[NoImage] global MeGUI_darx = 6480
---[NoImage] global MeGUI_dary = 4739

----[Information] AspectRatio: 21.259

[jagabo]

My guess is it's a bug in megui, a numeric overflow with --sar 64205:70041 is causing it to write the wrong DAR value in the mkv header.

[pooksahib]

Thanks guys. I changed the script in post #10 to read darx=4 and dary=3. The output file is now perfect. I guess MeGUI couldn't handle 6480 and 4739 PLUS the crop commmand (6480 and 4739 worked fine with no cropping).