Even Weirder Sync Issues

[koberulz]

I've captured some video from a Foxtel IQHD box via the Hauppage PVR. There was some sort of recording glitch thirty seconds in or so. If I play the M2TS file in Premiere starting before the glitch, it's fine. But if I stop it, then move the playhead anywhere else in the video, the audio is suddenly massively out of sync.

What in the blue hell is going on?

[jman98]

Sounds like dropped frames because of the glitch. VideoReDo (not free) has an option to fix corrupted MPEG streams and sometimes it can help with the dropped frames issue.

[koberulz]

Just to clarify, as I now realised I've phrased the OP poorly: if I start watching the video in Premiere before the glitch, the sound remains in sync even after the glitch. If I move the playhead anywhere after the glitch, it then goes out of sync. It plays fine in VLC, even if I jump around.

It seems more like a Premiere problem than a problem with the actual M2TS file.

[jagabo]

Editors are much less forgiving than media players when it comes to media files. Nothing unusual here.

[koberulz]

Given that it plays fine even in Premiere as long as I start watching it prior to the glitch occurring, is it still likely to be dropped frames? I would've thought were that the case that it'd unsync at the point of the glitch regardless of where you started watching it.

[hech54]

Is this H264 capture or mpeg2 capture we are talking about?....or neither?

[koberulz]

General
ID : 0 (0x0)
Format : MPEG-TS
File size : 13.1 GiB
Duration : 2h 10mn
Overall bit rate : 14.3 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 : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=1, N=64
Codec ID : 27
Duration : 2h 10mn
Bit rate mode : Variable
Bit rate : 13.2 Mbps
Maximum bit rate : 20.0 Mbps
Width : 1 920 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) : 0.254
Stream size : 12.0 GiB (92%)
Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : 129
Duration : 2h 10mn
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 5 channels
Channel positions : Front: L C R, Side: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -120ms
Stream size : 418 MiB (3%)

[jagabo]

Given that it plays fine even in Premiere as long as I start watching it prior to the glitch occurring, is it still likely to be dropped frames?

Yes, there is something wrong with the file.

[koberulz]

VideoReDo did the trick.