MKV aspect ratio - Page 2

SeeMoreDigital · 9th February 2006, 22:56

Quote:

Originally Posted by robU*4

To make sure your file is OK, try playing your file with VLC (non DirectShow), the AR should be correct if the file is correct.

As I mentioned earlier, I muxed the same MPEG-4 stream into the MKV container using VirtualDubMod and AVI-Mux GUI.

When both are played in VLC player the AVI-Mux GUI mux is correctly displayed but the VirtualDubMod mux is incorrectly displayed

I don't know for sure but doesnt VLC player access and detect AR signalling at stream level?

Can you confirm whether the aspect ratio signallng information of MKV files is stored at the container level or at the stream level. And what level should software media players be looking for?

Cheers

foxyshadis · 10th February 2006, 01:00

MKV stores aspect ratio in the container, and it should stay there. However, the bitstream can contain ARS; mmg will detect and remove it in that case (will push it to the container level). Could be that VDub doesn't do that, while VLC never checks the bitstream for AR.

So it's quite possible for double decoding to happen, or container-level when only bitstream-level AR is present, which is why I always use mmg. =p

Seb.26 · 10th February 2006, 10:03

I have re-install all my PCHC ... And all work fine now ?!

I don't know how but it's working ... I must make a ghost of this install !!!

Thanks a lot

That's all folks !!!
Seb.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

10th February 2006, 01:00	#22 \| Link
foxyshadis Angel of Night Join Date: Nov 2004 Location: Tangled in the silks Posts: 9,559	MKV stores aspect ratio in the container, and it should stay there. However, the bitstream can contain ARS; mmg will detect and remove it in that case (will push it to the container level). Could be that VDub doesn't do that, while VLC never checks the bitstream for AR. So it's quite possible for double decoding to happen, or container-level when only bitstream-level AR is present, which is why I always use mmg. =p

10th February 2006, 10:03	#23 \| Link
Seb.26 20-35 a win for Revolver. Join Date: Mar 2004 Location: FR.26 Posts: 221	I have re-install all my PCHC ... And all work fine now ?! I don't know how but it's working ... I must make a ghost of this install !!! Thanks a lot That's all folks !!! Seb.