.MTS incorrent length in Adobe Premiere PRO CS6

[shorto]

So I shot an event today with my camcorder and when I import these videos into the Adobe Premiere Pro, the length of the video is wrong; the event went on for about 1 hour and 40minutes and that is exactly what shows up in the camera if I play the files on it, even in other players (BSPlayer, VLC, Zoom, MPC) the length of the footage is correct, but in adobe it somehow gets the information that the recordings are around 5hrs in length. For test purpose I have started a test encode, but since the video is in full HD and currently being on my laptop it's going to take about 14hrs for a LQ single pass encode. So I was wondering since I'm expecting for the video to be somehow wrong due to the wrong length detected by Adobe, any clues as to what might cause this?

Another note, shot quite a few events with this camera and edited them in Adobe, no problems thus far.

Cheers

[aedipuss]

use mediainfo on the bad mts file. put mediainfo in text mode and copy/paste the results here. i'd guess something like the camera was in vfr mode though.

[poisondeathray]

What does mediainfo say about a sample source clip ? (view=>text)

What does premiere "think" the fps is (look at the clip in the clip bin) ?

Was it a continuous recording (file spanned clips) ? Did you import the clips individually or through the media browser in PP ? Is the directory structure intact (folder structure, with accessory files and metadata) ?



As a temporary workaround you could encode to a lossless intermediate (or near lossless intermediate like cineform)

[shorto]

So here it is;

General
ID                                       : 0 (0x0)
Complete name                            : C:\Users\Denis\Desktop\BDMV\STREAM\00002.MTS
Format                                   : BDAV
Format/Info                              : Blu-ray Video
File size                                : 1.90 GiB
Duration                                 : 19mn 49s
Overall bit rate mode                    : Variable
Overall bit rate                         : 13.7 Mbps
Maximum Overall bit rate                 : 18.0 Mbps

Video
ID                                       : 4113 (0x1011)
Menu ID                                  : 1 (0x1)
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.0
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 2 frames
Format settings, GOP                     : M=3, N=12
Codec ID                                 : 27
Duration                                 : 19mn 49s
Bit rate mode                            : Variable
Bit rate                                 : 12.9 Mbps
Maximum bit rate                         : 16.0 Mbps
Width                                    : 1 440 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 25.000 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan order                               : Top Field First
Bits/(Pixel*Frame)                       : 0.333
Stream size                              : 1.79 GiB (94%)

Audio
ID                                       : 4352 (0x1100)
Menu ID                                  : 1 (0x1)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Mode extension                           : CM (complete main)
Format settings, Endianness              : Big
Codec ID                                 : 129
Duration                                 : 19mn 49s
Bit rate mode                            : Constant
Bit rate                                 : 256 Kbps
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Compression mode                         : Lossy
Stream size                              : 36.3 MiB (2%)

So the length here is OK, and yes it's a continuous shot at least most of it is (and those are exactly the ones in questions) the 1st video that I ended the recording is fine and shows up in the Adobe as is 14mins in length the 2nd, 3rd and 4th are in questions since they are a continious shot, the 5th and 6th are again OK, due to the fact that they are seperate recordings.

Here is the copy paste from Adobe for the same file;

File Path: C:\Users\Denis\Desktop\BDMV\STREAM\00002.MTS
Type: MPEG Movie 
File Size: 1,9 GB
Image Size: 1440 x 1080
Frame Rate: 25,00
Source Audio Format: 48000 Hz - compressed - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
Total Duration: 00:56:41:19
Pixel Aspect Ratio: 1,3333

So as far as I can tell the 3 files in question are TOGETHER in length supposed to be 56min and 41sec, but Adobe detects each as to be this long.

[smrpix]

I'm expecting for the video to be somehow wrong due to the wrong length detected by Adobe

You've given a lot of reports on file information. But it's not clear whether you have actually dropped the files in a timeline and checked? What does that look like?

[turk690]

...So as far as I can tell the 3 files in question are TOGETHER in length supposed to be 56min and 41sec, but Adobe detects each as to be this long.

AVCHD camcorders record video in chunks of 2GB maximum each. Depending on the bitrate used, each *.mts file in the \STREAM folder can be anywhere from 10 to 20mins or longer. Two consecutive presses of the camcorder start/stop button can therefore produce a string of consecutively numbered *.mts files, each about 2GB, if the recording duration between those presses is longer than about what 2GB can fit into. Though these files can be be fished out of the \STREAM folder standalone and be used as is, metadata about how they are related to each other is contained in the \CLIPINF and \PLAYLIST folders. This metadata is dynamic and changes according to how new recordings are subsequently made with the camcorder.
When an NLE program like Adobe Premiere Pro is used to open a camcorder \BDMV folder that has all of the \CLIPINFO, \STREAM, and \PLAYLIST folders intact, it recognizes information in them to join together *.mts clips that were shot within the two consecutive presses of the start/stop button seamlessly into a whole new file. It can be confusing because this new virtual file is now the correct length of the joined 2GB *.mts chunks, but with no new file name. So for example, on a continuous 1hr shot which produced four files 0000.mts to 0003.mts, opening or dragging to the timeline any of these files in Premiere Pro will be like opening that whole continuous shot from 0000.mts to 0003.mts as one seamless whole. Opening 0000.mts, or 0002, 0003, or 0001.mts will have the same effect, so just dragging 0000.mts onto the timeline is enough. In the Premiere import bins, it will be easy to note which files have been joined: all of them will have the same long aggregated length.
This works as intended in that the files are joined seamlessly. If only the *.mts files were discretely opened in Premiere (taken from somewhere without the \CLIPINFO and \PLAYLIST folders included) and were added manually in the timeline, there is an audio glitch where they are joined, and frames may be dropped as well.
For me, I prefer importing only the *.mts files into Premiere, being careful not to drag the \CLIPINFO, etc. folders as well into the HDD capture drive. I like to retain them as the original 2GB *.mts chunks, which makes it easier for me to move them on the timeline a few frames to and fro to best align and sync them with an externally recorded audio track.