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View Full Version : Use graphedit to mux wmv/asf files, but bitrate got changed, why?


fifth5
27th July 2009, 11:30
When I muxed a wmv file I got following error message.
"The file is unsupported container format"

How could I mux wmv/asf files?
Doesn't mmg work for that?

thanks.

Keiyakusha
27th July 2009, 12:13
mmg can't do that and it never will be, as I remember from author's words.

fifth5
27th July 2009, 14:51
Anyway, I've figured out how to mux wmv with graphedit.

But the resulting file was smaller than original. Then I checked it out by using MediaInfo, then I got that video bitrate was a little lower than input file, why?

I think I just used MatroskaMuxer.ax to mux wmv, how could it change the bitrate?

Keiyakusha
27th July 2009, 15:17
If you mean overall bitrate, then it's possible. mkv probably has less container overhead. If you mean video bitrate, don't know about wmv, but with other streams this is also possible since bitstream can be slightly changed on muxing step.
But in addition to this, there can be some wierd stuff in mediainfo. I just muxed one file too using MPC-HC DS muxer and:
Original file reported to be:
Video Bit rate: 5 942 Kbps (confirmed by windows7 properties->details dialog)
Audio Bit rate: 192 Kbps (confirmed by windows7 properties->details dialog)
Overall bit rate: 6 977 Kbps
Maximum Overall bit rate: 6 183 Kbps (have no idea what is "maximum overall" and how it can be lower than 6977)
Filesize: 25.0 MiB
And muxed file:
Video Bit rate: 6 572 Kbps
Audio Bit rate: 192 Kbps
Overall bit rate: 6 902 Kbps
File size: 24.9 MiB

So I ended up with significantly higher video bitrate but lover filesize? And with all of this overall bitrate is lower? Impossible...

Edit: by the way, this is probably wrong forum for this thread...

fifth5
27th July 2009, 16:34
If you mean overall bitrate, then it's possible. mkv probably has less container overhead. If you mean video bitrate, don't know about wmv, but with other streams this is also possible since bitstream can be slightly changed on muxing step.
But in addition to this, there can be some wierd stuff in mediainfo. I just muxed one file too using MPC-HC DS muxer and:
Original file reported to be:
Video Bit rate: 5 942 Kbps (confirmed by windows7 properties->details dialog)
Audio Bit rate: 192 Kbps (confirmed by windows7 properties->details dialog)
Overall bit rate: 6 977 Kbps
Maximum Overall bit rate: 6 183 Kbps (have no idea what is "maximum overall" and how it can be lower than 6977)
Filesize: 25.0 MiB
And muxed file:
Video Bit rate: 6 572 Kbps
Audio Bit rate: 192 Kbps
Overall bit rate: 6 902 Kbps
File size: 24.9 MiB

So I ended up with significantly higher video bitrate but lover filesize? And with all of this overall bitrate is lower? Impossible...

Edit: by the way, this is probably wrong forum for this thread...

Thanks for your reply.

There's possibility for bitrate change during muxing, that's the conclusion, right?

In my case, as MediaInfo shown, not only video bitrate, but also resulting file size was smaller than original. However, audio bitrate was kept.

Anyway, it worked, and possibly MediaInfo got its own problem.

PS.
I don't know where to get this thread fitted, so... Sorry if it's bothering.