Mpeg1 files getting an mpeg2 header. Why?

[duhmez]

I just checked a bunch of mpeg1 files and I notice they now have an mpeg2 header, and don't play properly in windows. (seem to work OK on standalone unit)

Also When I locd these files in virtualdubmod it freaks out, "anachronistic or discontinuous timestamp" millions of these.

I'd like these files to not be patched wiht mpeg2 heder..........

What's up?

[ChrissyBoy]

Are you talking about your original mpgs or the output of svcd2dvd?

[duhmez]

Output of svcd2dvd. the source are definately mpeg1 (vcd) files. Mediaplayer, after making program stream with svcd2dvd, is using mpeg2 splitter and my ac3 decoder is processing the mpeg audio, which is strange too. Plius the other stuff I posted in the post above.

note this was making program streams, not elemtary, nor DVD folder.

Further investigation, I oaded tmpgenc demux, and the demuxer reports mpeg1. It's virtualdubmod and directshow that is kicking in the mpeg2 decoder. I will now try the other muxer and see if the same thing happens.

[duhmez]

Here is a logfile using bbdmux and mplex.Starting SVCD2DVD: v1.51.2.0
Begin time: 5:51:22 PM

******** Ripping BIN images to get mpegs (VCDGear -fix)

Analysing File: M:\Temp\New Folder\File.mpg
++ WARN: mpeg stream will be padded on the fly -- hope that's ok for you!

++ WARN: autopadding requires to insert additional 141036 zero bytes into MPEG stream (due to 511 unaligned packets of 512 total)



-->Processing 1 mpeg files.

############### New MPEG File ###############
File: M:\Temp\New Folder\File.mpg
Type: VCD
Horizontal Res: 352
Standard: NTSC
Audio SampleRate: 44100

******** Demultipexing original mpg file
bbDMUX - version 1.9, by Brent Beyeler (beyeler@home.com)

speed increases by, Apachez and Christian Vogelgsang

Saving stream 0xE0 into file M:\Temp\New Folder\File_DVD.mpv...

File M:\Temp\New Folder\File.mpg is an MPEG-1 Program Stream

Summary:

MPEG Packs = 22974

System headers = 1

Padding Stream packets = 3, total bytes = 5442

MPEG Audio stream 0 packets = 2895, total bytes = 5854751

Video stream 0 packets = 20078, total bytes = 40515796

bbDMUX - version 1.9, by Brent Beyeler (beyeler@home.com)

speed increases by, Apachez and Christian Vogelgsang

Saving stream 0xC0 into file M:\Temp\New Folder\File-0.mp2...

File M:\Temp\New Folder\File.mpg is an MPEG-1 Program Stream

Summary:

MPEG Packs = 22974

System headers = 1

Padding Stream packets = 3, total bytes = 5442

MPEG Audio stream 0 packets = 2895, total bytes = 5854751

Video stream 0 packets = 20078, total bytes = 40515796


(Total size: 44MB, Duration: 00:00:02, Rate(MB/Min): 1,011.74)

******** Resampling audio from 44.1 KHz to 48 KHz

(Total size: 5MB, Duration: 00:00:06, Rate(MB/Min): 49.36)

******** Multipexing elementry streams
INFO: [mplex] mplex version 2.2.2 ($Date: 2003/05/13 20:27:15 $)

INFO: [mplex] File M:\Temp\New Folder\File_DVD.mpv looks like an MPEG Video stream.

INFO: [mplex] File M:\Temp\New Folder\File_DVD.mpa looks like an MPEG Audio stream.

INFO: [mplex] Video stream 0: profile 8 selected - ignoring non-standard options!

INFO: [mplex] Found 1 audio streams and 1 video streams

INFO: [mplex] Selecting dvdauthor DVD output profile

INFO: [mplex] Multiplexing video program stream!

INFO: [mplex] Scanning for header info: Video stream e0 (M:\Temp\New Folder\File_DVD.mpv)

INFO: [mplex] VIDEO STREAM: e0

INFO: [mplex] Frame width : 352

INFO: [mplex] Frame height : 240

INFO: [mplex] Aspect ratio : forbidden

INFO: [mplex] Picture rate : 29.970 frames/sec

INFO: [mplex] Bit rate : variable

INFO: [mplex] Vbv buffer size : 40960 bytes

INFO: [mplex] CSPF : 0

INFO: [mplex] Scanning for header info: Audio stream c0 (M:\Temp\New Folder\File_DVD.mpa)

INFO: [mplex] MPEG AUDIO STREAM: c0

INFO: [mplex] Audio version : 1.0

INFO: [mplex] Layer : 2

INFO: [mplex] CRC checksums : no

INFO: [mplex] Bit rate : 28672 bytes/sec (224 kbit/sec)

INFO: [mplex] Frequency : 48000 Hz

INFO: [mplex] Mode : 0 stereo

INFO: [mplex] Mode extension : 0

INFO: [mplex] Copyright bit : 0 no copyright

INFO: [mplex] Original/Copy : 1 original

INFO: [mplex] Emphasis : 0 none

INFO: [mplex] SYSTEMS/PROGRAM stream:

INFO: [mplex] rough-guess multiplexed stream data rate : 0234048

INFO: [mplex] target data-rate specified : 10080000

INFO: [mplex] Setting specified specified data rate: 10080000

INFO: [mplex] Run-in Sectors = 89 Video delay = 13019 Audio delay = 13019

INFO: [mplex] New sequence commences...

INFO: [mplex] Video e0: buf= 237568 frame=000000 sector=00000000

INFO: [mplex] Audio c0: buf= 4096 frame=000000 sector=00000000

++ WARN: [mplex] Discarding incomplete final frame MPEG audio stream c0!

INFO: [mplex] Scanned to end AU 6266

INFO: [mplex] STREAM e0 completed @ frame 6266.

INFO: [mplex] STREAM c0 completed @ frame 8709.

INFO: [mplex] Multiplex completion at SCR=18816000.

INFO: [mplex] Video e0: buf= 217689 frame=006266 sector=00020295

INFO: [mplex] Audio c0: buf= 1408 frame=008709 sector=00002898

INFO: [mplex] VIDEO_STATISTICS: e0

INFO: [mplex] Video Stream length: 40515796 bytes

INFO: [mplex] Sequence headers: 526

INFO: [mplex] Sequence ends : 1

INFO: [mplex] No. Pictures : 6266

INFO: [mplex] No. Groups : 526

INFO: [mplex] No. I Frames : 526 avg. size 20238 bytes

INFO: [mplex] No. P Frames : 2614 avg. size 8529 bytes

INFO: [mplex] No. B Frames : 3127 avg. size 2422 bytes

INFO: [mplex] Average bit-rate : 1550000 bits/sec

INFO: [mplex] Peak bit-rate : 2137600 bits/sec

INFO: [mplex] BUFFERING min 17 Buf max 143219

INFO: [mplex] AUDIO_STATISTICS: c0

INFO: [mplex] Audio stream length 5853124 bytes.

INFO: [mplex] Syncwords : 8711

INFO: [mplex] Frames : 8711 padded

INFO: [mplex] Frames : 0 unpadded

INFO: [mplex] BUFFERING min 15 Buf max 683

INFO: [mplex] MUX STATUS: no under-runs detected.


(Total size: 46MB, Duration: 00:00:23, Rate(MB/Min): 116.36)

Analysing File: M:\Temp\New Folder\File_DVD.mpg
++ WARN: mpeg stream will be padded on the fly -- hope that's ok for you!

++ WARN: mpeg stream contained no scan information (user) data

++ WARN: autopadding requires to insert additional 141036 zero bytes into MPEG stream (due to 511 unaligned packets of 512 total)


============ Complete ============


============ Duration: 00:00:32

[duhmez]

next, for giggles, I ran SVCD2DVD on the file that I previously outputted. Here is the log in case it helps. (thinks it's svcd.. strange.)

Starting SVCD2DVD: v1.51.2.0
Begin time: 5:50:00 PM

******** Ripping BIN images to get mpegs (VCDGear -fix)

Analysing File: M:\Temp\New Folder\New Folder\File_DVD.mpg
++ WARN: mpeg stream will be padded on the fly -- hope that's ok for you!

++ WARN: mpeg stream contained no scan information (user) data

++ WARN: autopadding requires to insert additional 141036 zero bytes into MPEG stream (due to 511 unaligned packets of 512 total)



-->Processing 1 mpeg files.

############### New MPEG File ###############
File: M:\Temp\New Folder\New Folder\File_DVD.mpg
Type: SVCD
Horizontal Res: 352
Standard: NTSC
Audio SampleRate: 48000
- Leaving File_DVD.mpg alone. File has Nav Packs

============ Complete ============


============ Duration: 00:00:00

[duhmez]

Now here is a logfile using the other muxer and demuxer.

Starting SVCD2DVD: v1.51.2.0
Begin time: 5:55:20 PM

******** Ripping BIN images to get mpegs (VCDGear -fix)

Analysing File: M:\Temp\New Folder\File.mpg
++ WARN: mpeg stream will be padded on the fly -- hope that's ok for you!

++ WARN: autopadding requires to insert additional 141036 zero bytes into MPEG stream (due to 511 unaligned packets of 512 total)



-->Processing 1 mpeg files.

############### New MPEG File ###############
File: M:\Temp\New Folder\File.mpg
Type: VCD
Horizontal Res: 352
Standard: NTSC
Audio SampleRate: 44100

******** Demultipexing original mpg file

(Total size: 44MB, Duration: 00:00:01, Rate(MB/Min): 1,373.66)

******** Resampling audio from 44.1 KHz to 48 KHz

(Total size: 5MB, Duration: 00:00:06, Rate(MB/Min): 50.00)

******** Multipexing elementry streams
INFO: [???] mplex version 2.2.2 ($Date: 2003/05/13 20:27:15 $)

INFO: [???] File M:\Temp\New Folder\File_DVD.mpv looks like an MPEG Video stream.

INFO: [???] File M:\Temp\New Folder\File_DVD.mpa looks like an MPEG Audio stream.

INFO: [???] Video stream 0: profile 8 selected - ignoring non-standard options!

INFO: [???] Found 1 audio streams and 1 video streams

INFO: [???] Selecting dvdauthor DVD output profile

INFO: [???] Multiplexing video program stream!

INFO: [???] Scanning for header info: Video stream e0 (M:\Temp\New Folder\File_DVD.mpv)

INFO: [???] VIDEO STREAM: e0

INFO: [???] Frame width : 352

INFO: [???] Frame height : 240

INFO: [???] Aspect ratio : forbidden

INFO: [???] Picture rate : 29.970 frames/sec

INFO: [???] Bit rate : variable

INFO: [???] Vbv buffer size : 40960 bytes

INFO: [???] CSPF : 0

INFO: [???] Scanning for header info: Audio stream c0 (M:\Temp\New Folder\File_DVD.mpa)

INFO: [???] MPEG AUDIO STREAM: c0

INFO: [???] Audio version : 1.0

INFO: [???] Layer : 2

INFO: [???] CRC checksums : no

INFO: [???] Bit rate : 28672 bytes/sec (224 kbit/sec)

INFO: [???] Frequency : 48000 Hz

INFO: [???] Mode : 0 stereo

INFO: [???] Mode extension : 0

INFO: [???] Copyright bit : 0 no copyright

INFO: [???] Original/Copy : 1 original

INFO: [???] Emphasis : 0 none

INFO: [???] SYSTEMS/PROGRAM stream:

INFO: [???] rough-guess multiplexed stream data rate : 0234048

INFO: [???] target data-rate specified : 10080000

INFO: [???] Setting specified specified data rate: 10080000

INFO: [???] Run-in Sectors = 89 Video delay = 13019 Audio delay = 0

INFO: [???] New sequence commences...

INFO: [???] Video e0: buf= 237568 frame=000000 sector=00000000

INFO: [???] Audio c0: buf= 4096 frame=000000 sector=00000000

INFO: [???] Scanned to end AU 6266

++ WARN: [???] Discarding incomplete final frame MPEG audio stream c0!

INFO: [???] STREAM e0 completed @ frame 6266.

INFO: [???] STREAM c0 completed @ frame 8709.

INFO: [???] Multiplex completion at SCR=18819072.

INFO: [???] Video e0: buf= 218601 frame=006266 sector=00020295

INFO: [???] Audio c0: buf= 1408 frame=008709 sector=00002898

INFO: [???] VIDEO_STATISTICS: e0

INFO: [???] Video Stream length: 40515796 bytes

INFO: [???] Sequence headers: 526

INFO: [???] Sequence ends : 1

INFO: [???] No. Pictures : 6266

INFO: [???] No. Groups : 526

INFO: [???] No. I Frames : 526 avg. size 20238 bytes

INFO: [???] No. P Frames : 2614 avg. size 8529 bytes

INFO: [???] No. B Frames : 3127 avg. size 2422 bytes

INFO: [???] Average bit-rate : 1550000 bits/sec

INFO: [???] Peak bit-rate : 2137600 bits/sec

INFO: [???] BUFFERING min 17 Buf max 143219

INFO: [???] AUDIO_STATISTICS: c0

INFO: [???] Audio stream length 5853124 bytes.

INFO: [???] Syncwords : 8711

INFO: [???] Frames : 8711 padded

INFO: [???] Frames : 0 unpadded

INFO: [???] BUFFERING min 15 Buf max 683

INFO: [???] MUX STATUS: no under-runs detected.


(Total size: 46MB, Duration: 00:00:03, Rate(MB/Min): 799.28)

Analysing File: M:\Temp\New Folder\File_DVD.mpg
++ WARN: mpeg stream will be padded on the fly -- hope that's ok for you!

++ WARN: mpeg stream contained no scan information (user) data

++ WARN: autopadding requires to insert additional 141036 zero bytes into MPEG stream (due to 511 unaligned packets of 512 total)


============ Complete ============


============ Duration: 00:00:11

[ChrissyBoy]

what does avicodec think the _DVD.mpg files are?

[duhmez]

very strange indeed. not all ive processed are like this, howevcer MANY of them are. Here is what AVIcodec says.

V. Codec name Mpeg 2 (SVCD/DVD)

A.1 codec name Mpeg-1 audio Layer 1 [0xc0]

This file was an mpeg1 vcd ready file.

[duhmez]

Any idea?

[ChrissyBoy]

No. I will need to see a sample (of the original mpeg). Can you use the MakeSample tool (from the Tool Menu) to make a sample & ftp it to:

ftp://svcd2dvd:Upload@ftp.svcd2dvdmpg.com:7676/duhmez


CB

[duhmez]

I was in error with my previous statement, it is doing it to each and every mpeg file I throw at it. (The sample I sent is funny, check it out)

[ChrissyBoy]

Well a few things were discovered...

Yes the file now has a mpg2 header and so programs which only look at this header report it to be a mpg2 program stream. Others look a bit more closely and report it correctly.

Whilst this isn't an issue when authoring with SVCD2DVD i can see how other applications may choke.

I wiill fix it in v2

[duhmez]

Good job! A question if you wouldn't mind. Why does this happen? Does it only happen when making PS ? And is this why you didn't detect this issue because ES and Author modes don't do it?
Or does it always do it and no one ever realized because the output files always work?

[ChrissyBoy]

ES doesn't do it. Authoring does but the _DVD.mpg files are not usually reused. So it would only be noticed in PS/VCD.... Anyway going forward this won't be an issue.

CB