wordbox
28th March 2002, 18:12
Hello:
I have been using bbMpeg for some time. I like it. But, I have a question. How does one get a finished resolution of 720X480 or 704X480 in mpeg2 or DVD? I use bbMpeg 12418.
I have finally worked my way up to creating DVD mpegs. I started out making VCDs, and then SVCDs, all with very little trouble. But for the past week or so, I have tried to create standard NTSC DVD mpegs and have not been able to get them to come out at the correct resolution.
The stumbling block seems to be the "Aspect Ratio" setting in the "Video Stream Settings" tab.
I use bbMpeg as a plugin in Adobe Premiere generally, but I have also tried the avi2mpg2 with the same result. I capture analog video from VHS or Hi-8 to AVI. I generally capture at 480X480, (it has worked well for me to this point). I edit my footage in Premiere and then call up bbMpeg to do the encoding to whatever type of mpeg that I want. Up to this point, I had always gotten the size, (resolution), mpeg that I intended. In trying to encode to 720X480 resolution, in the "DVD" setting, I have gotten one of the following finish resolution sizes:
720X540 with the 4:3 Aspect Ratio
720X720 with the Square sel Aspect Ratio
825X480 with the 16:9 Aspect Ratio
1060X480 with the 2.21:1 Aspect Ratio
I have to say that it was a little funny watching my video in a couple of these resolutions. They all encode OK, and play on the computer. And in fact, I even made a SVCD using some 720X540 "DVD" mpegs that I encoded, and that works OK in my Apex 500 DVD player. But, I'm not able to get the correct resolutions in my finished mpegs.
"How do you know that your finished mpegs are the above sizes?" you might ask. Well, I play them in the WMplayer on my computer and pause the video, then right click, and click "Properties." The "Properties" box comes up and the resolution is listed. Also, I can see that the Aspect Ratio is not what one would expect, (visually), when played in the WMplayer or on my TV, (the SVCD that I created fills the TV screen).
*Here is the info from a short mpeg that I created.
-----------
"Properties" dialog box
Alex_short.mpg
-----------
"Details" Tab
Type:
Size: 15.1MB (15,890,432 bytes)
Media Length: 00:35
Video Size: 720 x 540
Created: Friday, March 22, 2002 11:04:49 AM
-----------
You see that the "Video Size" is 720x540. It plays fine and looks good, but it's not 720X480.
The strange thing is that bbMpeg will warn the operator with a notation in the text of the "Message" file, (the "Message" dialog box), if the operator didn't set the parameters correctly for DVD. I have set the parameters correctly and still I get a finished mpeg of 720X540 resolution even though the saved text "Message" shows that the output will be 720X480.
**See Example text "Message" below from the short mpeg that I created.
I have tried all of the settings that I believed to be even remotely related to the problem. I have tried feeding the encoder the video at several different resolutions. I encoded first to a 720X480 AVI, and then to bbMpeg. All with the same result; the finished "mpeg" video always comes out at one of the above resolutions, never at 720X480.
I have also tried using TMPGEnc, and have gotten the same result with it.
Can I turn off the "Aspect Ratio"? Have I missed something? Can you help me to get the correct resolution in my DVD mpegs? Or, are these the results that everyone gets and I just didn't know that?
Also, can anyone tell me what happened to Brent Beyeler's WEB site, or what's going on with him?
My computer info is:
Windows 98 SE
Celeron 800
Shuttle AE25 motherboard
256MB PC133 SDRAM
WinTV-Go capture card
ATI Expert 2000 video card, 32MB
------------------------
**Example text "Message."
------------------------
Input information
Video:
width: 720, height: 480
first frame: 0, number of frames: 1066
Audio:
sample rate: 48.0 kHz
channels: stereo
bits per sample: 16
Output MPEG information
Video: D:\Alex_short.m2v, deleted if multiplexed
DVD, 720x480 @ 29.970 fps, variable bitrate, quant value = 4
Audio: D:\AlexGabMoon_short.mp2, deleted if multiplexed
Layer 2, 224 kbps, 48.0 kHz, stereo
Multiplexing: video and one audio stream
program stream type: DVD with pulldown auto-detection
video file: D:\Alex_short.m2v
audio 1 file: D:\Alex_short.mp2
program file: D:\Alex_short.mpg
Encoding Video:
Min bitrate of any one frame = 2306 bits
Max bitrate of any one frame = 274630 bits
Min bitrate over any one second = 2524793 bps
Avg bitrate over any one second = 2936710 bps
Max bitrate over any one second = 4756401 bps
Total time: 671 seconds (00:11:11), 1.59 frames/sec, 0.629 sec/frame.
Encoding Audio:
Avg slots/frame = 672.000; b/smp = 4.67; br = 224.000 kbps.
Multiplexing video and audio:
Scanning video stream for a sequence header and pulldown type ...
no pulldown detected ...
Scanning video stream for pictures ...
Found 1076 picture headers.
Video stream information
Stream length : 13829154
Total time (seconds) : 35
Sequence start : 72
Sequence end : 1
No. Pictures : 1076
No. Groups : 72
No. I Frames : 72 avg. size 23742 bytes
No. P Frames : 287 avg. size 14156 bytes
No. B Frames : 717 avg. size 11237 bytes
No. D Frames : 0 avg. size 0 bytes
Horizontal size : 720
Vertical size : 480
Aspect ratio : 1.0000
Picture rate : 29.970 frames/sec
Bit rate : 612500 bytes/sec (4900000 bits/sec)
Computed avg rate : 386250 bytes/sec (3090000 bits/sec)
Computed max rate : 609950 bytes/sec (4879600 bits/sec)
Vbv buffer size : 229376 bytes
CSPF : 0
Scanning audio stream for access units information
Found 1484 audio frame headers.
MPEG audio stream information
Stream length : 997248
Syncwords : 1484
Frames : 1484 size 672 bytes
Frames : 0 size 673 bytes
Layer : 2
CRC checksums : yes
Bit rate : 28000 bytes/sec (224 kbit/sec)
Frequency : 48.0 kHz
Mode : 0 stereo
Mode extension : 0
Copyright bit : 0 no copyright
Original/Copy : 0 copy
Emphasis : 0 none
Multiplexing information
Video stream data rate : 609950 bytes/sec (4879600 bits/sec)
Audio stream 1 data rate : 28000 bytes/sec (224000 bits/sec)
Total data rate : 1260000 bytes/sec (10080000 bits/sec)
Multiplexing file d:\alex_short.mpg
Finished multiplexing d:\alex_short.mpg
------------------------------------------
I have been using bbMpeg for some time. I like it. But, I have a question. How does one get a finished resolution of 720X480 or 704X480 in mpeg2 or DVD? I use bbMpeg 12418.
I have finally worked my way up to creating DVD mpegs. I started out making VCDs, and then SVCDs, all with very little trouble. But for the past week or so, I have tried to create standard NTSC DVD mpegs and have not been able to get them to come out at the correct resolution.
The stumbling block seems to be the "Aspect Ratio" setting in the "Video Stream Settings" tab.
I use bbMpeg as a plugin in Adobe Premiere generally, but I have also tried the avi2mpg2 with the same result. I capture analog video from VHS or Hi-8 to AVI. I generally capture at 480X480, (it has worked well for me to this point). I edit my footage in Premiere and then call up bbMpeg to do the encoding to whatever type of mpeg that I want. Up to this point, I had always gotten the size, (resolution), mpeg that I intended. In trying to encode to 720X480 resolution, in the "DVD" setting, I have gotten one of the following finish resolution sizes:
720X540 with the 4:3 Aspect Ratio
720X720 with the Square sel Aspect Ratio
825X480 with the 16:9 Aspect Ratio
1060X480 with the 2.21:1 Aspect Ratio
I have to say that it was a little funny watching my video in a couple of these resolutions. They all encode OK, and play on the computer. And in fact, I even made a SVCD using some 720X540 "DVD" mpegs that I encoded, and that works OK in my Apex 500 DVD player. But, I'm not able to get the correct resolutions in my finished mpegs.
"How do you know that your finished mpegs are the above sizes?" you might ask. Well, I play them in the WMplayer on my computer and pause the video, then right click, and click "Properties." The "Properties" box comes up and the resolution is listed. Also, I can see that the Aspect Ratio is not what one would expect, (visually), when played in the WMplayer or on my TV, (the SVCD that I created fills the TV screen).
*Here is the info from a short mpeg that I created.
-----------
"Properties" dialog box
Alex_short.mpg
-----------
"Details" Tab
Type:
Size: 15.1MB (15,890,432 bytes)
Media Length: 00:35
Video Size: 720 x 540
Created: Friday, March 22, 2002 11:04:49 AM
-----------
You see that the "Video Size" is 720x540. It plays fine and looks good, but it's not 720X480.
The strange thing is that bbMpeg will warn the operator with a notation in the text of the "Message" file, (the "Message" dialog box), if the operator didn't set the parameters correctly for DVD. I have set the parameters correctly and still I get a finished mpeg of 720X540 resolution even though the saved text "Message" shows that the output will be 720X480.
**See Example text "Message" below from the short mpeg that I created.
I have tried all of the settings that I believed to be even remotely related to the problem. I have tried feeding the encoder the video at several different resolutions. I encoded first to a 720X480 AVI, and then to bbMpeg. All with the same result; the finished "mpeg" video always comes out at one of the above resolutions, never at 720X480.
I have also tried using TMPGEnc, and have gotten the same result with it.
Can I turn off the "Aspect Ratio"? Have I missed something? Can you help me to get the correct resolution in my DVD mpegs? Or, are these the results that everyone gets and I just didn't know that?
Also, can anyone tell me what happened to Brent Beyeler's WEB site, or what's going on with him?
My computer info is:
Windows 98 SE
Celeron 800
Shuttle AE25 motherboard
256MB PC133 SDRAM
WinTV-Go capture card
ATI Expert 2000 video card, 32MB
------------------------
**Example text "Message."
------------------------
Input information
Video:
width: 720, height: 480
first frame: 0, number of frames: 1066
Audio:
sample rate: 48.0 kHz
channels: stereo
bits per sample: 16
Output MPEG information
Video: D:\Alex_short.m2v, deleted if multiplexed
DVD, 720x480 @ 29.970 fps, variable bitrate, quant value = 4
Audio: D:\AlexGabMoon_short.mp2, deleted if multiplexed
Layer 2, 224 kbps, 48.0 kHz, stereo
Multiplexing: video and one audio stream
program stream type: DVD with pulldown auto-detection
video file: D:\Alex_short.m2v
audio 1 file: D:\Alex_short.mp2
program file: D:\Alex_short.mpg
Encoding Video:
Min bitrate of any one frame = 2306 bits
Max bitrate of any one frame = 274630 bits
Min bitrate over any one second = 2524793 bps
Avg bitrate over any one second = 2936710 bps
Max bitrate over any one second = 4756401 bps
Total time: 671 seconds (00:11:11), 1.59 frames/sec, 0.629 sec/frame.
Encoding Audio:
Avg slots/frame = 672.000; b/smp = 4.67; br = 224.000 kbps.
Multiplexing video and audio:
Scanning video stream for a sequence header and pulldown type ...
no pulldown detected ...
Scanning video stream for pictures ...
Found 1076 picture headers.
Video stream information
Stream length : 13829154
Total time (seconds) : 35
Sequence start : 72
Sequence end : 1
No. Pictures : 1076
No. Groups : 72
No. I Frames : 72 avg. size 23742 bytes
No. P Frames : 287 avg. size 14156 bytes
No. B Frames : 717 avg. size 11237 bytes
No. D Frames : 0 avg. size 0 bytes
Horizontal size : 720
Vertical size : 480
Aspect ratio : 1.0000
Picture rate : 29.970 frames/sec
Bit rate : 612500 bytes/sec (4900000 bits/sec)
Computed avg rate : 386250 bytes/sec (3090000 bits/sec)
Computed max rate : 609950 bytes/sec (4879600 bits/sec)
Vbv buffer size : 229376 bytes
CSPF : 0
Scanning audio stream for access units information
Found 1484 audio frame headers.
MPEG audio stream information
Stream length : 997248
Syncwords : 1484
Frames : 1484 size 672 bytes
Frames : 0 size 673 bytes
Layer : 2
CRC checksums : yes
Bit rate : 28000 bytes/sec (224 kbit/sec)
Frequency : 48.0 kHz
Mode : 0 stereo
Mode extension : 0
Copyright bit : 0 no copyright
Original/Copy : 0 copy
Emphasis : 0 none
Multiplexing information
Video stream data rate : 609950 bytes/sec (4879600 bits/sec)
Audio stream 1 data rate : 28000 bytes/sec (224000 bits/sec)
Total data rate : 1260000 bytes/sec (10080000 bits/sec)
Multiplexing file d:\alex_short.mpg
Finished multiplexing d:\alex_short.mpg
------------------------------------------