Cannot seek mkv

[roughnecks]

Hi there.

I have recorded some gameplay with MSI Afterburner, using x264vfw as video format and mkv as container.
When I open that file with Avidemux, I cannot seek to desired position because it doesn't stick. Pressing play it always start from the beginning and advancing the timeline slider (when the "player" is stopped) doesn't get me a preview of the video.

In this situation I cannot go to some point in time to cut where I'd like to, but I only can play the video from the beginning, forcing me to watch it all.

Here's medianfo report:

Code Select Expand

General
Unique ID                                : 173278224971879922090146890675488471748 (0x825C2C1680A4F879B4B184AAF1B6BAC4)
Complete name                            : D:\Video\Temp\The Tape_2017_04_19_22_38_18_479.mkv
Format                                   : Matroska
Format version                           : Version 4 / Version 2
File size                                : 1.68 GiB
Duration                                 : 38 min 52 s
Overall bit rate                         : 6 194 kb/s
Movie name                               : The Tape_2017_04_19_22_38_18_479.mkv
Encoded date                             : UTC 2017-04-19 22:38:18
Writing application                      : MSIAfterburner.exe v4.3.0.9267
Writing library                          : RivaTuner media encoding library v1.38.0.0

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Baseline@L3.1
Format settings, CABAC                   : No
Format settings, ReFrames                : 1 frame
Codec ID                                 : V_MS/VFW/FOURCC / H264
Duration                                 : 38 min 52 s
Width                                    : 1 280 pixels
Height                                   : 720 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 30.000 FPS
Original frame rate                      : 25.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Writing library                          : x264 core 148 r2694bm 3b70645
Encoding settings                        : cabac=0 / ref=1 / deblock=0:0:0 / analyse=0:0 / me=dia / subme=0 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=3 / lookahead_threads=3 / sliced_threads=1 / slices=3 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=250 / keyint_min=25 / scenecut=0 / intra_refresh=0 / rc=crf / mbtree=0 / crf=20.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=0
Language                                 : English
Default                                  : Yes
Forced                                   : No

Audio
ID                                       : 2
Format                                   : PCM
Codec ID                                 : A_PCM/INT/LIT
Duration                                 : 38 min 52 s
Bit rate mode                            : Constant
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 kHz
Bit depth                                : 16 bits
Language                                 : English
Default                                  : Yes
Forced                                   : No



Am I doing something wrong? Thanks

[Jan Gruuthuse]

Check if you're using the latest 2.6.19 for your windows from: win32_ / win64_ support

If this is latest avidemux 2.6.19. Try a re-mux with mkvtoolnix

If still an issue, make an 10 second recording and upload this sample video as it is.
Info: Upload Hochladen Télécharger Subir

[eumagga0x2a]

Likely I-frames not marked as keyframes. I have some DVB-C recordings remuxed by older Avidemux versions which exhibit the same symptoms (they are still seekable in mpv though).

Nevertheless, please provide a sample.

[roughnecks]

Check if you're using the latest 2.6.19 for your windows from: win32_ / win64_ support

If this is latest avidemux 2.6.19. Try a re-mux with mkvtoolnix

Latest version, yeah, but mkvtoolnix worked. Thanks
Do you know why is this happening and if is there something I can do to fix it for the next recording (I mean, without being forced to re-mux it)?

[roughnecks]

Nevertheless, please provide a sample.

I'm going to do that in a couple hours.

[roughnecks]

https://www.dropbox.com/s/7p16djh1wc539sz/hl2_2017_04_20_12_03_36_402.mkv?dl=0

[eumagga0x2a]

[...] mkvtoolnix worked. Thanks

This is a different issue than with my non-seekable MKVs then. Once loaded in Avidemux and saved in copy mode (remuxed), the resulting video becomes seekable in Avidemux. No luck with my own samples.

[mirh]

In my case, trying to manually set time in this kind of unseekable files, also make the program hang.
EDIT: test case

[roughnecks]

In my case, trying to manually set time in this kind of unseekable files, also make the program hang.

It crashed to me too when I tried.

[Jan Gruuthuse]

>8 >8 Once loaded in Avidemux and saved in copy mode (remuxed), the resulting video becomes seekable in Avidemux. >8 >8

as previously stated (above quote)

Load the none seekable mkv's into avidemux.
Save the loaded video with [Copy] for both Video and Audio Output with Output Format set to [Mkv Muxer]
90% chance the saved mkv works normal again.

[mean]

It seems like it is a mp4 vs annexB issue, i.e. the two different muxing mode of h264
That file is using the non usual one for mkv

Once remuxed with mkvmerge , it works fine

[roughnecks]

It seems like it is a mp4 vs annexB issue, i.e. the two different muxing mode of h264
That file is using the non usual one for mkv

Anything I can change here to make it work?

[mean]

output mode is the key

[roughnecks]

I can only choose to save to file instead of vfw, but I need vfw to capture within Afterburner. Should I change the FourCC?

[mirh]

Once remuxed with mkvmerge , it works fine

Sure, I can confirm.
It would still be better if it was handled natively though.
If technically infeasible or too much effort-requiring, at least it should not screw up the program.