MKV playback, recompression, remuxing, codec packs, players, howtos, etc.
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dragonstar0828
- Posts: 18
- Joined: Wed Apr 09, 2014 10:56 pm
#1
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by dragonstar0828 » Sun Apr 13, 2025 3:20 pm
Hey all...
I'm trying to open a .mkv file that plays on my Windows PC and my Oppo console blu-ray player, but when I try and open it with MakeMkv I get error "V_MS/VFW/FOURCC/DX50 not recognized" followed by "file has no video tracks".
Well it does have video because I can play the file, is there some codec I need for MakeMkv to understand the video format in the file or is this something that will be suppoted in a later release?
Thanks in advance for any help.
drc

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Coopervid
- Posts: 2792
- Joined: Tue Feb 19, 2019 10:32 pm
#2
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by Coopervid » Sun Apr 13, 2025 4:54 pm
dragonstar0828 wrote: ↑Sun Apr 13, 2025 3:20 pm
Hey all...
I'm trying to open a .mkv file that plays on my Windows PC and my Oppo console blu-ray player, but when I try and open it with MakeMkv I get error "V_MS/VFW/FOURCC/DX50 not recognized" followed by "file has no video tracks".
Well it does have video because I can play the file, is there some codec I need for MakeMkv to understand the video format in the file or is this something that will be suppoted in a later release?
Thanks in advance for any help.
drc
...and what do you want to achieve by doing this???
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dragonstar0828
- Posts: 18
- Joined: Wed Apr 09, 2014 10:56 pm
#3
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by dragonstar0828 » Sun Apr 13, 2025 6:56 pm
The file has a Russian audio track as the primary and English secondary, so I'm trying to make a new .mkv file leaving that outthe Russian one so the English track is the only one remaining.
Not sure why what I want to do with the file has any beaing on the error I'm reporting.
drc

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bmillham
- Posts: 168
- Joined: Mon Mar 27, 2017 12:42 am
#4
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by bmillham » Sun Apr 13, 2025 11:41 pm
Use MKVToolNix. It can strip out unwanted audio, or switch what is the primary audio.
All without re-encoding. It just re-muxes the MKV so it's much faster.
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dragonstar0828
- Posts: 18
- Joined: Wed Apr 09, 2014 10:56 pm
#5
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by dragonstar0828 » Tue Apr 15, 2025 12:43 am
Thanks for the software tip, it'll probably be this weekend before I get a chance to take it for a test spin.
drc
