[wmv2 @ 0xb42400] warning, clipping 1 dct coefficients to -255..255

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[wmv2 @ 0xb42400] warning, clipping 1 dct coefficients to -255..255

BlueHat
Any one got any idea what this is? I'm making some changes to a C/AS3 API to use ffmpeg to encode some videos with audio and I'm trying to use wmv, I'm wondering what this error is all about and if anyone had any idea how to sort it? It's causing my video to return with 0 frames.
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Re: [wmv2 <at> 0xb42400] warning, clipping 1 dct coefficients to -255..255

Carl Eugen Hoyos
BlueHat <elliotb <at> sparkol.com> writes:

> Any one got any idea what this is?

Use -mbd 2

For future questions:
Please always post the command line you are using
together with the complete, uncut console output.

Carl Eugen

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Re: [wmv2 <at> 0xb42400] warning, clipping 1 dct coefficients to -255..255

BlueHat
I'm doing this in C not in the command line so a single command isn't massively helpful =/
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Re: [wmv2 <at> 0xb42400] warning, clipping 1 dct coefficients to -255..255

Moritz Barsnick
On Wed, Jun 18, 2014 at 04:17:15 -0700, BlueHat wrote:
> I'm doing this in C not in the command line so a single command isn't
> massively helpful =/

That's why you should have told us in the first place what you are
actually trying! ;-)

Check ./doc/examples/muxing.c, and see the block of code containing
mb_decision. (And use the define FF_MB_DECISION_RD instead of 2. :-))

Moritz
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Re: [wmv2 <at> 0xb42400] warning, clipping 1 dct coefficients to -255..255

BlueHat
This post was updated on .
Sorry guys I should have been more clear. I'm re-building an API between ffmpeg and an AS3 Air application, never done anything with ffmpeg before and this is my first time so I'm not always sure what information is useful and which isn't as well! :P

Thanks! That's fixed the warnings, it's still not creating the video but that's my C code which I'm feebly attempting to debug right now.

Awesome :)