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Flickering and flashing in Tmpgene

 
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DIeselpr29



Joined: 20 Mar 2004
Posts: 3

PostPosted: Sat 20 Mar 2004, 18:43    Post subject: Flickering and flashing in Tmpgene Reply with quote

Can anybody tell me how to get an AVI file compressed to MPEG-2 without flickering here are the setting and what not about the file.

Original AVI file is-

Video
FPS- 15.000
Frame Size- 784 X 560
Length- 3036 Frames or Time-3:22.40

Audio
Sampling rate- 22050Hz
Channels- Mono
Sample precision- 16-bit


I converted the AVI file to these standards using another AVI edit program-

Video
FPS- 29.97
Frame Size- 720 X 480
Length- 6066 Frames or Time-3:22.40

Audio
Sampling Rate- 48000
Channels- 2
Sample Precision- 16-bit


Tmpgenc-

Stream Type- MPEG-2 Video
Size- 720 X 480
Aspect- 4:3 display
Frame Rate- 29.97
Rate Control mode- CBR
Bitrate- 8000
VBV buffer- Auto
Profile & Level- MP&ML
Video- NTSC
Encode- Interlace
YUV- 4:2:0
DC Component- 10 bit
Motion Search- Highest Quality
Video Source type- INterlace
Field Order- Bottom Field-B
Source Apsect Ratio- 4:3 525 line
Video Arrange- Full Screen(keep Apsect)
I-GOP= 1
P-GOP= 5
B-GOP= 0
Output interval- 1
MAX GOP= 18
Output Bitstream checked
Detect Scene change checked
Audio MPEG-1 48000
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RMN
Site Admin


Joined: 04 Feb 2003
Posts: 587
Location: Lisboa, Portugal

PostPosted: Sat 20 Mar 2004, 21:35    Post subject: Reply with quote

Your source video has a very strange resolution. Is it interlaced? If so, the flickering is probably caused by improper resizing of interlaced footage.

But it's very odd that a 15-FPS movie would be interlaced, so I'm guessing it's not.

How exactly did you convert it to 720x480, 29.97 FPS...?

RMN
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DIeselpr29



Joined: 20 Mar 2004
Posts: 3

PostPosted: Sun 21 Mar 2004, 1:42    Post subject: Reply with quote

The Source file is non-interlaced and I used Virtual-Dub
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RMN
Site Admin


Joined: 04 Feb 2003
Posts: 587
Location: Lisboa, Portugal

PostPosted: Sun 21 Mar 2004, 3:29    Post subject: Reply with quote

If the source is not interlaced, you should select "non-interlaced" in TMPGEnc's source options (in the "Advanced" tab).

Some "stuttering" will be inevitable, since you are playing something that only has 15 updates per second on a medium that normally does 60 (59.94, to be more precise) updates per second.

It's like playing a 3D computer game with a slow graphics card; the movement loses fluidity.

But there shouldn't be any flickering. Have you tried playing the movie created by VirtualDub (before using it in TMPGEnc)? Does it flicker, too?

RMN
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DIeselpr29



Joined: 20 Mar 2004
Posts: 3

PostPosted: Sun 21 Mar 2004, 18:00    Post subject: Reply with quote

Yes I have tried playing the movie in Virtual Dub and it plays great. I only getting the flickering when I encode it to MPEG2 from a AVI file. Also I already tried selecting Non-interlace in TMPGEnc
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RMN
Site Admin


Joined: 04 Feb 2003
Posts: 587
Location: Lisboa, Portugal

PostPosted: Sun 21 Mar 2004, 19:45    Post subject: Reply with quote

Well, then I have no idea what's causing the problem. If the AVI file is the correct resolution and the correct frame rate, then TMPGEnc isn't doing any sort of conversion, so the resulting MPEG file should look exactly the same (minus any normal quality loss caused by the compression).

Where did you play back the MPEG file?

RMN
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