Problem with quality after rendering

[Nikephoros768]

Hello there :
I'm trying to make an E-Learning course. So i recorded my desktop (1366x768) using Kazam in Ubuntu at 15 fps. It is saved in a mp4 file. I imported that file in Sony Vegas Pro 12 and it displayed a message, it asked me if I wanted to match the video settings with the project settings or something like that, and I clicked "yes".

When I was done editing I clicked "render" using the profile 6 MBps HD 720-30p wmv Video. Here's the output

http://postimage.org/image/5z9dgzvtx/full/

The original quality.

http://postimage.org/image/lk0c2agrn/full/

As you can see the output video looks awful. Is this a problem with the source video itself? Am I choosing the wrong profile? If so, What profile should I choose?

Thanks in advance for your answer(s)

[poisondeathray]

sometimes it will guess incorrectly about matching the settings

what were the video specs? use mediainfo (view=>text), copy & paste the info back here

what were the project settings that it "guessed?" file=>project properties

what were the exact render settings?

For some types of setups you might need to apply a Studio RGB to computer RGB filter before exporting, or vice versa (this wil help fix the levels issue, where black doesn't look black)

[Nikephoros768]

@ poisondeathray:
The source video specs are: http://pastebin.com/kfjjfTU9

Project Properties:

http://postimage.org/gallery/5bb1kxcy/33deaf3f/

Render Profile:
http://postimage.org/gallery/cp4w7xko/7273b3f8/

[poisondeathray]

Your recording was 15fps, but your render settings were 30fps. By default, vegas will add those extra frames by using a blended frame of the previous and next frame (looks like "ghosting" or double image). You can change this by right clicking the clip and changing resample to "off" instead of "smart resample) . This will make duplicates instead of blends . Or better yet just export a 15fps file instead of 30fps (change that in the render settings)

The levels issue should be "fixed" by using studioRGB to ComputerRGB filter before rendering (test this you by rendering a short loop region)

I don't know why you're getting the "combing" or "interlaced" look as everything is progressive (file properties, project settings, export settings). You might try exporting a different format like h.264/aac/mp4

[Nikephoros768]

Here's what I did:
Changed the Render Profile frame rate to 15fps
Set the resample to "off"
Applied Sony Levels effect - Preset studioRGB to ComputerRGB

It looks like this:

http://postimage.org/image/dkull3mub/full/

I'm still getting that interlaced look, OOOHH GOOD!!!

[poisondeathray]

I'm not sure why... that shouldn't be happening...

Did you try another export format (other than wmv)? maybe something buggy with wmv exports

It shouldn't have any effect, but you can try project properties, deinterlace method=>interpolate , or maybe set it to "none". But in theory this shouldn't do anything on a progressive file

[Nikephoros768]

I tried rendering to various formats. Same result!. It's odd ... Same thing happens in KDenLive.

[poisondeathray]

Can you upload a sample of the original file? There might be a problem with the recording not reflected by the mediainfo information

[Nikephoros768]

Sure, but it's gonna take a while due to my internet connection

[poisondeathray]

You don't need to upload the entire thing, just cut a sample e.g. using avidemux . video=>copy , audio=>copy, format=> mp4. Navigate to a section and cut on the nearest keyframe (push the "<<" or ">>" button in the gui), mark in, mark out that selection, ctrl+s to save

I find it improbable that both vegas and kdenlive would treat the file in exactly the same way - it doesn't make sense. This suggests that something might be amiss with original recording

[Nikephoros768]

Sorry, I messed up XD, how can I split a portion of the video without re-encoding? I did it with YAMB and it changed several things

[poisondeathray]

Sorry, I messed up XD, how can I split a portion of the video without re-encoding? I did it with YAMB and it changed several things

yamb (mp4box) shouldn't change anything. Exactly what did it change?

Or you can try avidemux suggested above^

[Nikephoros768]

https://www.dropbox.com/s/1j6fak7q2fj5qd1/Conocer_Ubuntu_001.mp4

[Cauptain]

This file use X264 with Fourcc AVC1. Try change to H264.




Claudio

[poisondeathray]

There is nothing "wrong" with it. I don't know why it's happening

In vegas , right click the clip in the clip bin, what does it say about the file properties

[Cauptain]

Easy way to correct this.

Open your file in Virtualdub using directshow filter, select direct stream copy for audio and video and save avi file.

The new file work perfect in Vegas in any resolution.




Claudio

[Nikephoros768]

How can I do that?

[Nikephoros768]

^^ Sorry for the last comment, I'll try what Cauptain suggested

[Cauptain]

How can I do that?

1 - Download Virtualdub
2 - Download a Directshow filter here: http://www.virtualdub.org/beta/DShowInputDriver-0.93.zip
3 - Extract to Virtualdub\Plugins32 - (If no exist this folder, make it.)
4 - Look screenshots below and get your work file:

Claudio

[Nikephoros768]

http://postimage.org/gallery/1dg6bk0u/d7f1e3a7/

The clip properties

[poisondeathray]

I'm very confused as to why you are getting those results...

Does the preview within vegas look ok ? (ie. before exporting out)

Try what Cauptain suggested

[Cauptain]

I'm very confused as to why you are getting those results...

Does the preview within vegas look ok ? (ie. before exporting out)

No Poison. In preview its wrong too.





Claudio

[Nikephoros768]

Yes, it does look good. Now I'm having problems with the directshow filter LOL!, Virtualdub won't open the mp4!

[Nikephoros768]

Oh, mine looks good...I'll check agian

[Nikephoros768]

Maybe I'll just try recording it again, the only problem is that Kazam only supports mp4 and webm formats, and Vegas doesn't support webm files

[Nikephoros768]

Fullscreen preview looks awful; same as rendered video D:

[poisondeathray]

So both of you have the decoding issue? I currently don't have vegas installed on any of my computers so I can't test it (and I didn't upgrade to 12 as I moved completely to Adobe)

You can try other recording software, maybe camstudio (on windows), it supports all VFW codecs/formats you have installed on your system

[Nikephoros768]

Hi; unfortunately virtualdub crashes when I try to open the mp4; It says it's a problem with quick time, can't open the files with DS filter either. Any one knows how to read assembly language?

VirtualDub crash report -- build 32842 (release)
--------------------------------------

Disassembly:
040915c0: 01e8 add eax, ebp
040915c2: ad lodsd
040915c3: 37 aaa
040915c4: 0000 add [eax], al
040915c6: 8bf0 mov esi, eax
040915c8: 85f6 test esi, esi
040915ca: 59 pop ecx
040915cb: 59 pop ecx
040915cc: 7434 jz 04091602
040915ce: 56 push esi
040915cf: ff3580170a04 push dword ptr [040a1780]
040915d5: ff35a42c0a04 push dword ptr [040a2ca4]
040915db: e8eafaffff call 040910ca
040915e0: 59 pop ecx
040915e1: ffd0 call eax
040915e3: 85c0 test eax, eax
040915e5: 741b jz 04091602
040915e7: 6a00 push 00h
040915e9: 56 push esi
040915ea: e8c1fbffff call 040911b0
040915ef: 59 pop ecx
040915f0: 59 pop ecx
040915f1: ff15a4c00904 call dword ptr [0409c0a4]
040915f7: 834e04ff or dword ptr [esi+04h], 0ffh
040915fb: 8906 mov [esi], eax
040915fd: 33c0 xor eax, eax
040915ff: 40 inc eax
04091600: eb07 jmp 04091609
04091602: e86cfbffff call 04091173
04091607: 33c0 xor eax, eax
04091609: 5e pop esi
0409160a: 5f pop edi
0409160b: c3 ret
0409160c: 8b442404 mov eax, [esp+04h]
04091610: a3b42c0a04 mov [040a2cb4], eax
04091615: c3 ret
04091616: 55 push ebp
04091617: 8bec mov ebp, esp
04091619: 83ec08 sub esp, 08h
0409161c: 897dfc mov [ebp-04h], edi
0409161f: 8975f8 mov [ebp-08h], esi
04091622: 8b750c mov esi, [ebp+0ch]
04091625: 8b7d08 mov edi, [ebp+08h]
04091628: 8b4d10 mov ecx, [ebp+10h]
0409162b: c1e907 shr ecx, 07h
0409162e: eb06 jmp 04091636
04091630: 8d9b00000000 lea ebx, [ebx+00]
04091636: 660f6f06 movdqa xmm0, [esi]
0409163a: 660f6f4e10 movdqa xmm1, [esi+10h]
0409163f: 660f6f5620 movdqa xmm2, [esi+20h]
04091644: 660f6f5e30 movdqa xmm3, [esi+30h]
04091649: 660f7f07 movdqa [edi], xmm0 <-- FAULT
0409164d: 660f7f4f10 movdqa [edi+10h], xmm1
04091652: 660f7f5720 movdqa [edi+20h], xmm2
04091657: 660f7f5f30 movdqa [edi+30h], xmm3
0409165c: 660f6f6640 movdqa xmm4, [esi+40h]
04091661: 660f6f6e50 movdqa xmm5, [esi+50h]
04091666: 660f6f7660 movdqa xmm6, [esi+60h]
0409166b: 660f6f7e70 movdqa xmm7, [esi+70h]
04091670: 660f7f6740 movdqa [edi+40h], xmm4
04091675: 660f7f6f50 movdqa [edi+50h], xmm5
0409167a: 660f7f7760 movdqa [edi+60h], xmm6
0409167f: 660f7f7f70 movdqa [edi+70h], xmm7
04091684: 8db680000000 lea esi, [esi+80]
0409168a: 8dbf80000000 lea edi, [edi+80]
04091690: 49 dec ecx
04091691: 75a3 jnz 04091636
04091693: 8b75f8 mov esi, [ebp-08h]
04091696: 8b7dfc mov edi, [ebp-04h]
04091699: 8be5 mov esp, ebp
0409169b: 5d pop ebp
0409169c: c3 ret
0409169d: 55 push ebp
0409169e: 8bec mov ebp, esp
040916a0: 83ec1c sub esp, 1ch
040916a3: 897df4 mov [ebp-0ch], edi
040916a6: 8975f8 mov [ebp-08h], esi
040916a9: 895dfc mov [ebp-04h], ebx
040916ac: 8b5d0c mov ebx, [ebp+0ch]
040916af: 8bc3 mov eax, ebx
040916b1: 99 cdq
040916b2: 8bc8 mov ecx, eax
040916b4: 8b4508 mov eax, [ebp+08h]
040916b7: 33ca xor ecx, edx
040916b9: 2bca sub ecx, edx
040916bb: 83e10f and ecx, 0fh
040916be: 33ca xor ecx, edx

Built on Aegis on Fri Dec 24 13:18:44 2010 using compiler version 1400

Windows 6.1 (Windows Vista x64 build 7600) []

EAX = 85180000
EBX = 08681040
ECX = 00000020
EDX = 00000000
EBP = 0853fc70
ESI = 08681040
EDI = 85180000
ESP = 0853fc68
EIP = 04091649
EFLAGS = 00010202
FPUCW = 027f
FPUTW = ffff

Crash reason: Access Violation

Crash context:
An out-of-bounds memory access (access violation) occurred in module 'Quicktime'...

...writing address 85180000...

...while running thread "Dub-I/O" (thread.cpp:163).

Pointer dumps:

EBX 08681040: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
ESI 08681040: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
ESP 0853fc68: 00001000 00000000 0853fca0 040916ef 85180000 08681040 00001000 0408b1df
0853fc88: 00000002 08681020 08681040 00000001 04212870 80000000 85180000 0408903b
0853fca8: 85180000 08681040 00001002 00000000 04212870 00000000 00000000 08680020
0853fcc8: 00000004 00000190 00000000 00000064 00000000 00000001 00000001 040865ff
EBP 0853fc70: 0853fca0 040916ef 85180000 08681040 00001000 0408b1df 00000002 08681020
0853fc90: 08681040 00000001 04212870 80000000 85180000 0408903b 85180000 08681040
0853fcb0: 00001002 00000000 04212870 00000000 00000000 08680020 00000004 00000190
0853fcd0: 00000000 00000064 00000000 00000001 00000001 040865ff 00000000 00000001

Thread call stack:
04091649: Quicktime!VDGetPluginInfo [04080000+22a0+f3a9]
040916ef: Quicktime!VDGetPluginInfo [04080000+22a0+f44f]
0408b1df: Quicktime!VDGetPluginInfo [04080000+22a0+8f3f]
0408903b: Quicktime!VDGetPluginInfo [04080000+22a0+6d9b]
040865ff: Quicktime!VDGetPluginInfo [04080000+22a0+435f]
04082b57: Quicktime!VDGetPluginInfo [04080000+22a0+8b7]
004d3891: VDVideoSourcePlugin::_read()
004c81b5: DubSource::read()
0041cea3: VDDubIOThread::ReadRawVideoFrame()
0051cd04: VDPostCheckExternalCodeCall()
0041d14e: VDDubIOThread::MainAddVideoFrame()
0041d8e6: VDDubIOThread::ThreadRun()
005190d2: VDThread::StaticThreadStart()
005b808e: _callthreadstartex()
005b8133: _threadstartex@4()
77283677: kernel32!BaseThreadInitThunk [77270000+13665+12]
779c9d72: ntdll!RtlInitializeExceptionChain [77990000+39d0f+63]
779c9d45: ntdll!RtlInitializeExceptionChain [77990000+39d0f+36]

-- End of report

[Nikephoros768]

I think I'll give up and use Camstasia

[Cauptain]

Yes, it does look good. Now I'm having problems with the directshow filter LOL!, Virtualdub won't open the mp4!

Easy. Install FFDSHOW, go to VFW config and select like this:






Claudio