VLC 2.XX - Issue with merged mpg2 files

[Dave-C]

Hello,

I got an issue (since vlc 2.0, 1.9 no problems) with merged mpg2 files, where vlc only recognizes the first 2 hours of a 4 hour file.

Years ago i digitized all my 4 hour VHS tapes via my Panasonic DVD Recorder (2 Discs for 1 4h Tape).
The 2 Discs in vob format i merged via nero vision express back to 1 big 4hour mpg2 file.

VLC, Media Player, Power DVD aswell as some DVR's all had no problems, playing that files.
Yesterday i wanted to watch some of those treasures and realized that instead of 4 hours, vlc only recognized about the first 1h 55min, which is the point, where the 2nd part of the file was added.

Since i knew that vlc back then worked fine with these files, i tried some older versions and the issue starts at 2.0.

System Win XP and 7
Version VLC 2.00 - VLC 2.06

[Lotesdelere]

We need a short sample, can you make one ?
50 MB max will be enough.

Then upload it to EmbedUpload.com, so it will upload the file for you to several other hosts and then post the link to the file here.

[Dave-C]

Sorry for the late response, had been off due to work...

It looks like it's not an issue that the file was merged, i found out that VLC since 2.0 doesn't show any of my Nero edited files the correct length.

I followed your advice and uploaded an test clip with the correct length of 2:54.
But VLC shows only 1:20.

This was not an issue until 2.0.
Power DVD and WMP have no issue with this file.

http://www.embedupload.com/?d=8JJGCFFEFP

Hope that upload was correctly done, doing this the first time, if not, let me know...

[Lotesdelere]

I followed your advice and uploaded an test clip with the correct length of 2:54.
But VLC shows only 1:20.

Confirmed, it also occurs with VLC 2.1.0-pre1.
The 'funny' thing is that VLC seems to count half the time, I mean when VLC counts 1 second in fact it lasts 2 seconds.
I think you should create a new ticket on the VLC Trac with your messages log and the links to your file and to this thread.

[Rémi Denis-Courmont]

Hmm, it might very well be that the file is broken. Please check that the problem also happens with a proper muxer software before you file a bug against VLC.

[Dave-C]

Hmm, it might very well be that the file is broken. Please check that the problem also happens with a proper muxer software before you file a bug against VLC.

I'm not an expert, but why did all my files work correctly til VLC 2.0 ?
Also they are shown correctly in Power DVD, WMP and WMP Classic..

If it maybe helps you, i usually edit my files this way (since years)...

Copy Files from either my Panasonic HDD/DVD (vob/mpg2) or Dreambox (ts/mpg2) to PC.
Demux with Project X and merge with Cuttermaran.
Edit (Cut at start and end) with Nero Vision Express 6 (i know it's old but it's just enough for me).

[Lotesdelere]

Any other player I've tried is reporting the correct length.
Including FFPlay:

Code: Select all

Input #0, mpeg, from 'Nero-test.mpg': Duration: 00:02:53.82, start: 0.322511, bitrate: 4653 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 704x576 [SAR 12:11 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s