MediaInfo(Lib) 0.7 - Reading information about media files

[Keiyakusha]

Originally Posted by Zenitram

the headache you had is due to a value roundig issue (sometimes the delta is 41 ms, sometimes 42 ms) and MediaInfo was sometimes catching the CFR, sometimes not.

Yes, this works way better! Thank you for such a quick fix!

[Keiyakusha]

Zenitram
Hi. About the issue I reported earlier. With 24000/1001 framerates it was fixed indeed, but it looks like 60000/1001 and 15000/1001(yes I have one thing that was released on dvd and bd and have this real fps) framerates are affected too. I can make some samples, but it looks like exactly the same issue.
Edit: I'm using mediainfo 0.7.60 release version

[ikuban]

Hi Zenitram,
what about the DTS bitrate issue? Did you forget to fix it?

[Brazil2]

Two APE files with APEv2 tags, MediaInfo is showing the tags of one of the files but not for the other one, while players are showing the tags of both files. Sample files: http://www.embedupload.com/?d=6RIYCHIWRF

[Zenitram]

Originally Posted by Keiyakusha

About the issue I reported earlier. With 24000/1001 framerates it was fixed indeed, but it looks like 60000/1001 and 15000/1001

Please provide samples, it is easier for me to find the issue.

Originally Posted by ikuban

Hi Zenitram,
what about the DTS bitrate issue? Did you forget to fix it?

Oh... Yes. Still on my ToDo-list.

Originally Posted by Brazil2

Two APE files with APEv2 tags, MediaInfo is showing the tags of one of the files but not for the other one, while players are showing the tags of both files.

I see tags in both files, but the parser fails on the second file, right. i'll dig the issue.

[Keiyakusha]

Originally Posted by Zenitram

Please provide samples, it is easier for me to find the issue.

Here is 3 samples: http://www.mediafire.co/?pmewtf38g1gw822
1) I expect to see constant framerate, but it shows variable. Real framerate is (should be) 15000/1001
2) Same as first case, just framerate is 60000/1001
3) New problem, it shows constant framerate but reports that container and stream framerate differ (it shows 59.880 for container). HeaderEditor from mkvtoolnix reports that container framerate is the same as in sample 2 (16683333 nanoseconds which is 59.94...). If I remux stream with mkvmerge and will manually specify container framerate 60000/1001, then mediainfo shows exact 60 fps for container. I expect it to show constant framerate 60000/1001

Hope this helps...

[Keiyakusha]

Uhh... here is 4th sample. I expect to see 24000/1001 constant fps...
http://www.mediafire.com/?i2ybcdwbgbwxy9h

[manolito]

I do not know if this was brought up before, I noticed a problem with versions 07.59 and 07.60 for MPEG2 files.

My source is a DVD compliant MPEG2 file (one video track, one AC3 audio track, nothing else). Muxing was done with either mplex or Imago. In any case MediaInfo shows a second (non-existing) MPEG audio track with a bitrate of 0 kbps.

Going back to version 07.58 fixes this issue.


Cheers
manolito


//Edit
This problem does not occur if the MPEG2 file is very small.

[Zenitram]

Originally Posted by manolito

In any case MediaInfo shows a second (non-existing) MPEG audio track with a bitrate of 0 kbps.

I need the file (PM if you don't want to have it public)

[manolito]

Originally Posted by Zenitram

I need the file (PM if you don't want to have it public)

Hi Zenitram,
this seems to be a little difficult...

As I said before, the problem only occurs for bigger files. I did some more tests to determine the size threshold, but I stopped at a file size of 1.3 GB. This file still caused no problems, but MPEG2 files at DVD-5 size (above 4 GB) always throw off Mediainfo 7.59 or 7.60.

I certainly cannot upload a file of this size (it would take more than 12 hours), but it should be easy enough to make an MPEG2 file of this size yourself.


Some more info about the offending files:

Source: PAL TV capture via DVB-T to a .ts file
Demux with ProjectX
Edit with Cuttermaran
Reencode using HCenc and Aften (audio format AC3 CBR 2-channel 224 kbps)
Demux DVD using DGIndex
Mux to MPEG2 using either mplex or Imago (made no difference).



Cheers
manolito

[Zenitram]

Originally Posted by manolito

But it should be easy enough to make an MPEG2 file of this size yourself.

I have several TS files of more than 10 GB and I don't have this problem. I'll do nothing if I can not reproduce easily the issue.

[Kurtnoise]

Originally Posted by manolito

Some more info about the offending files:

Source: PAL TV capture via DVB-T to a .ts file
Demux with ProjectX
Edit with Cuttermaran
Reencode using HCenc and Aften (audio format AC3 CBR 2-channel 224 kbps)
Demux DVD using DGIndex
Mux to MPEG2 using either mplex or Imago (made no difference).

could you try to use muxman as DVD muxer for your last step ?

[LoRd_MuldeR]

Originally Posted by Zenitram

I have several TS files of more than 10 GB and I don't have this problem. I'll do nothing if I can not reproduce easily the issue.

AFAIK, the video files an a Video-DVD (VOB files) are muxed as Program Streams (with a few DVD-specific extensions), not Transport Streams.

Maybe that makes the difference...

[Zenitram]

Originally Posted by LoRd_MuldeR

AFAIK, the video files an a Video-DVD (VOB files) are muxed as Program Streams (with a few DVD-specific extensions), not Transport Streams.

Maybe that makes the difference...

The soruce is TS, I agree the format is not precise for the analyzed file (PS or TS). Anyway, without file, no correction on my side.

[manolito]

@kurtnoise

could you try to use muxman as DVD muxer for your last step ?

Muxman does not create MPEG2 files, it can only make a DVD structure. But the DVD I extracted the streams from was authored with Muxman.

@Zenitram

Anyway, without file, no correction on my side.

OK, I'll bite. Here is the link to an offending MPEG2 file. Size is 2.7 GB, smaller files did not show this issue.
http://www.sendspace.com/filegroup/f...TKhgYstvgjXgwg

As I said before, Mediainfo versions up to 7.58 have no problems with this file, versions 7.59 and 7.60 report a nonexistent second MPG audio stream.


Cheers
manolito

[Kurtnoise]

Originally Posted by manolito

Muxman does not create MPEG2 files, it can only make a DVD structure. But the DVD I extracted the streams from was authored with Muxman.

Well, I don't understand what you've done...mplex or Imago aren't dvd muxer ?

[manolito]

Originally Posted by Kurtnoise

Well, I don't understand what you've done...mplex or Imago aren't dvd muxer ?

I needed an MPEG2 file for some testing. To mux the elementary streams (.m2v and .ac3) I used either mplex or Imago. Muxman would have been useless in this case, because it is NOT a pure dvd muxer. It muxes and authors in one step, there is no way to get an MPEG2 file out of Muxman.


Cheers
manolito

[SeeMoreDigital]

Originally Posted by manolito

Muxman would have been useless in this case, because it is NOT a pure dvd muxer.

Now I'm confused...

Muxman generates 'pure' DVD compliant muxes from compliant elementary streams and places these streams within the .VOB container. You can't get more 'DVD compliant' than this.

Originally Posted by manolito

It muxes and authors in one step, there is no way to get an MPEG2 file out of Muxman.

There are quite a few tools to get the MPEG-2 stream out of the .VOB container (as an elementary .M2V stream). There are even tools to re-mux from the .VOB container to the .MPG container.

There are also tools to re-mux from the .VOB to the .TS container, .M2TS container, .MKV container, MP4 container, .MOV container and even the .AVI container!

[manolito]

Originally Posted by manolito

Some more info about the offending files:

Source: PAL TV capture via DVB-T to a .ts file
Demux with ProjectX
Edit with Cuttermaran
Reencode using HCenc and Aften (audio format AC3 CBR 2-channel 224 kbps)
Author DVD using Muxman
Demux DVD using DGIndex
Mux to MPEG2 using either mplex or Imago (made no difference).

We are moving in circles...
Maybe I should have added the red line in my description.

The DVD was authored with Muxman. To get an MPEG2 file from this DVD I demuxed it and muxed it again. You are not really telling me that I should have used Muxman a second time, are you ?

Kurtnoise's point seems to be that the muxer might be to blame. This is not the case. I also tried to make the MPEG2 directly from the VOBs with VOB2MPEG (uses ffmpeg), but it made no difference regardless which muxer I had used. Again: This is not a muxer issue, it is a Mediainfo issue!



Cheers
manolito

[Zenitram]

Originally Posted by manolito

it is a Mediainfo issue!

In order to stop the conversion about something useless: I confirm it is a MediaInfo issue.