Problem editting MPG video (Avidemux)

[Kiwi999]

Hi
I have a home video on DVD. Sometime ago I created an MPG video from it called "Ant MPEG1 MP2 MPEG_PS No edits.mpg". This plays perfectly in Windows Media Player.

I proceeded to edit this mpg using Avidemux, so producing "Ant Cuts.mpg". This plays perfectly in Windows Media Player.

I've recently tried to edit Ant Cuts.mpg (I wanted to create a video of just the first half of the original mpg.) called "SBase MPEG-PS(A+V).mpg" won't play (It just flashes up the message "Error downloading codec")

I tried again with different Avidemux settings to produce "SBase MPGVideo.mpg" It won't play either --- It displays "Operation failed due to a certification error"

I suspect I am not using the correct settings in Avidemux. Try as I may, I can't seem to reproduce my original settings! Can someone please tell me the correct Avidemux settings to use.

(Full details of videos below.)

Thanks in advance

PS I have read the Thread: How to get started with avidemux, edit and convert any video format

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REPORTS EXPORTED USING MediaInfo 0.7.38

This video, Ant MPEG1 MP2 MPEG_PS No edits.mpg plays OK

General
Complete name : C:\Documents and Settings\G\Desktop\Ant My Video EDIT\Ant MPEG1 MP2 MPEG_PS No edits.mpg
Format : MPEG-PS
File size : 253 MiB
Duration : 25mn 23s
Overall bit rate : 1 391 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format settings, BVOP : Yes
Format settings, Matrix : Default
Duration : 25mn 23s
Bit rate mode : Constant
Bit rate : 1 235 Kbps
Nominal bit rate : 1 152 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 5:4
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.119
Stream size : 224 MiB (89%)

Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 25mn 23s
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 23.2 MiB (9%)

Menu


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This video, Ant Cuts.mpg plays OK

General
Complete name : C:\Documents and Settings\G\Desktop\Ant My Video EDIT\Ant Cuts.mpg
Format : MPEG-PS
File size : 225 MiB
Duration : 22mn 28s
Overall bit rate : 1 397 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format settings, BVOP : Yes
Format settings, Matrix : Default
Duration : 22mn 28s
Bit rate mode : Constant
Bit rate : 1 241 Kbps
Nominal bit rate : 1 152 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 5:4
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.120
Stream size : 199 MiB (89%)

Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 22mn 28s
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 20.6 MiB (9%)

Menu

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This video, Ant cuts2.mpg plays OK

General
Complete name : C:\Documents and Settings\G\Desktop\Ant My Video EDIT\Ant cuts2.mpg
Format : MPEG-PS
File size : 192 MiB
Duration : 19mn 6s
Overall bit rate : 1 403 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format settings, BVOP : Yes
Format settings, Matrix : Default
Duration : 19mn 6s
Bit rate mode : Constant
Bit rate : 1 247 Kbps
Nominal bit rate : 1 152 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 5:4
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.120
Stream size : 170 MiB (89%)

Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 19mn 6s
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 17.5 MiB (9%)

Menu

==========
This video, SBase MPEG-PS(A+V).mpg won't play (Flashes up the message "Error downloading codec")

General
Complete name : C:\Documents and Settings\G\Desktop\Ant My Video EDIT\SBase MPEG-PS(A+V).mpg
Format : MPEG-PS
File size : 375 MiB
Duration : 5mn 34s
Overall bit rate : 9 405 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=12
Duration : 5mn 34s
Bit rate mode : Variable
Bit rate : 8 032 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.775
Stream size : 307 MiB (82%)

Audio
ID : 160 (0xA0)
Format : PCM
Format settings, Endianness : Big
Format settings, Sign : Signed
Muxing mode : DVD-Video
Duration : 5mn 34s
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 61.3 MiB (16%)

Menu

==========
This video, SBase MPGVideo.mpg won't play (Operation failed due to a certification error")

General
Complete name : C:\Documents and Settings\G\Desktop\Ant My Video EDIT\SBase MPGVideo.mpg
Format : MPEG Video
Format version : Version 2
File size : 307 MiB
Duration : 5mn 34s
Overall bit rate : 7 706 Kbps

Video
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=12
Duration : 5mn 34s
Bit rate mode : Variable
Bit rate : 7 394 Kbps
Nominal bit rate : 8 032 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.713
Stream size : 295 MiB (96%)

==========

[Bjs]

The last two are using VBR in video data ... use CBR .

The two non-working clips also have very short play length times for the file size being created .

[Kiwi999]

Thanks.

But what is CBR and where do I change it?

[Kiwi999]

I'm wondering if this thread should be in the Editing forum. I'm a newbie.

[bendixG15]

I'm wondering if this thread should be in the Editing forum. I'm a newbie.

You're okay, this forum is like the hallway, everyone comes thru here first.......

[Nelson37]

You appear to be re-encoding. If you just want to cut the video without changing it's encoding parameters, I would recommend a simple cutter like Mpeg2Cut2. No changes to the format of audio or Video.

The clip with the codec problem has the audio changed to PCM. I also see the aspect ratio changed in one of the clips. Also Progressive changes to Interlaced. IMO you are using the wrong tool for the job. Check that, you are DEFINITELY using the wrong tool.

Re-encoding loses quality with each use. Nothing at all wrong with VBR, for video.