MeGUI: General Questions and Troubleshooting Thread

[simonhowson]

I've used MeGUI to encode a Blu-ray sourced HD VC1 file to x264, using the iPhone video profile and AAC audio. I used the MeGUI MP4 muxer, but the file won't import into iTunes. When I try to play it in Quicktime, it gives the following error:



I tried muxing the files with NicMP4box (the modified version of MP4box that was hacked together specifically to enable the creation of iTunes compatible MP4 files), but again, it couldn't produce an MP4 that would play in Quicktime or import into iTunes.

So, could this mean that the 23.976 frame rate is incompatible with the iPhone? I've never encoded a Blu-ray to iPhone profile h264 before, but have encoded many DVDs and have never had this problem of the file being incompatible.

If the problem is with the frame rate, how would I go about converting the frame rate to one that will encode properly?

[Kurtnoise]

http://wjarrettc.blogspot.com/2007/0...blic-atom.html
http://www.aoamedia.com/mp4patch.htm

[Keiyakusha]

On Win7, Drag n Drop into main Megui window stops working for me. Is this some compatibility issue?

[simonhowson]

Originally Posted by Kurtnoise

http://wjarrettc.blogspot.com/2007/0...blic-atom.html
http://www.aoamedia.com/mp4patch.htm

I tried using AoA MP4 Patch but it still didn't work. The new file gives exactly the same error when I tried to play it in QuickTime.

The other application Tagger was a dead link, and I don't have Java installed so I didn't try it.

Could it have something to do with the way the file was encoded?

All I did was resize the image from 1920 x 1080 to 640 x 368 anamorphic

# Set DAR in encoder to 16 : 9. The following line is for automatic signalling
global MeGUI_darx = 16
global MeGUI_dary = 9
DirectShowSource("L:\howthe\howthe.track_4113-muxed.mkv", fps=23.976, audio=false, convertfps=true)
#deinterlace
crop( 2, 0, -2, 0)

LanczosResize(640,368) # Lanczos (Sharp)
#denoise

The only other problem I can think of is the frame rate, but aren't most well encoded NTSC DVDs encoded as 23.976, then soft telecined?

Is there a tool that can extract the raw h264 video from the file so I can try remuxing it again from scratch?

[b66pak]

@simonhowson use mp4box or mp4creator to demux the .mp4 to raw (.264 + .acc)

use mp4box or mp4creator to remux .264 + .aac to a new .mp4

this will solve the problem...

to avoid this problem in the future ALWAYS encode to .264 (NOT .mp4) and in the final step mux to .mp4...
_

@Kurtnoise do you have another link for Tagger (it looks interesting)...
_

[MrVideo]

Originally Posted by skystrife

Was this perhaps the case on your end as well?

Nope, immediate crash at pass one.

[Sharktooth]

Originally Posted by Keiyakusha

On Win7, Drag n Drop into main Megui window stops working for me. Is this some compatibility issue?

win7 is not finished and still unsupported.

[simonhowson]

Originally Posted by b66pak

@simonhowson use mp4box or mp4creator to demux the .mp4 to raw (.264 + .acc)

use mp4box or mp4creator to remux .264 + .aac to a new .mp4

this will solve the problem...

to avoid this problem in the future ALWAYS encode to .264 (NOT .mp4) and in the final step mux to .mp4...

I extracted the raw video and remuxed it using MP4box and it worked! Thanks for your advice, I'll change my MeGUI settings.

[rapscallion]

I have a question not related to a problem, but just curiosity.

I'm somewhat new to the HD video arena but have done SD video encodes the last few years (DVD Rebuilder being one)

From what I understand, an SD video has a certain max avg bitrate. In other words a smaller than dvd5 group of vob's won't encode to a higher avg bitrate than the original, just because there's more room. At least that is my understanding.

By accident, the other day, I entered a higher bitrate than I intended for a input m2ts and the resulting avg bitrate in the 264 file was higher than the original and, of course, the file size was larger. (rawavc output, using X264 standalone avchd profile)

I didn't think that was possible, but maybe in the world of m2ts HD it is ?...and Iwonder does that mean the picture quality is improved (sort of like getting something from nothing ?), or maybe the opposite, it's degraded?

Comments from the experts much appreciated because my searches turned up nothing.

[karasu]

My X264 process eat a lot of Ram (process usage vary between 500'000K and 1'500'000K )
The source is a DVD. Such a huge memory usage is normal ?

Edit: here is my settings : Job commandline: "C:\Program Files\megui\tools\x264\x264.exe" --crf 21.5 --ref 4 --mixed-refs --no-fast-pskip --bframes 2 --b-pyramid --weightb --trellis 2 --partitions p8x8,b8x8,i4x4,i8x8 --8x8dct --me umh --threads auto --thread-input --sar 3185:2911 --progress --no-ssim --output "H:\Movies\taste of tea.mp4" "H:\Movies\taste of tea.avs"

[buzzqw]

is using tesa ... yes

BHH

[Sharktooth]

TESA is a PLACEBO. Use UMH... you wont see ANY difference and will get a nice speed boost.

@rapscallion: bitrate is not limited by the resolution. x264 can produce files bigger than the original as well as xvid or any other encoders. also, that doesnt mean it can "improve" the source... it cant be done. every time you re-encode you WILL loose some quality (unless you're re-encoding with a lossless method).

[karasu]

I'm not using tesa. Can the avs content affect the amount of memory used by the x264 process?

[rapscallion]

Originally Posted by Sharktooth

@rapscallion: bitrate is not limited by the resolution. x264 can produce files bigger than the original as well as xvid or any other encoders. also, that doesnt mean it can "improve" the source... it cant be done. every time you re-encode you WILL loose some quality (unless you're re-encoding with a lossless method).

That makes sense and what I would expect. So, if the resulting bitrate is higher than the source, what are those "extra" bits doing, other than increasing the file size ?

[karasu]

Originally Posted by rapscallion

That makes sense and what I would expect. So, if the resulting bitrate is higher than the source, what are those "extra" bits doing, other than increasing the file size ?

Your source is the decompressed output of your file, If you save that output in raw and lossless format you will end with a HUGE file. Lossy compression will produce a filesize between 0 and the size of your raw output. So if you set an higher bitrate than the compressed source, you will end with a file larger than this source.

I dont know what happens if you set a bitrate higher than the raw source.

[pihug12]

I finally solve my problem with the update.

I delete these keys :




And I delete the file "C:\Users\Pierre\Desktop\Streamy\proxy.pac".

I don't know how this file was a part of the registry. It was just unzipped from an archive, no installer.

[rack04]

The latest x264 update is extracted with the following file name:

x264.

Therefore it doesn't replace the existing version.

[Sharktooth]

bah! i really need to replace the keyboard.
however it's extracted as x264..exe ....

[Taddeusz]

Recently I noticed that the Cyberlink H.264 decoder does not properly report 1080 lines for AVC encoded video so I've been trying different decoders. CoreAVC works very well but it seems to cause MeGUI's interface to stop responding if you click anywhere on the encoding monitor window. x264.exe still continues to run but you can no longer tell the statistics of the conversion. Any ideas?

[Inspector.Gadget]

Taddeusz - why are you using DirectShowSource for H.264 instead of DGAVCIndex/DGAVCDecNV?