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View Full Version : MOV to WMV encoding with FFMPEG poor quality

Houmie

4th June 2009,

Hello,

I need to convert MOV files to WMV and thought of the powerful FFMPEG converter. However by doing

ffmpeg -i test.mov test.wmv

I would get a small and very poor quality output.

I dont understand how to figure out the best switches for WMV settings and can t find anything on google. It seems everyone is converting WMV to MOV for their Ipods. But no one the other way around.

Can please someone knowledgeable help me with this how to encode HQ with WMV.

Many Thanks,

buzzqw

just raise the bitrate ffmpeg will use otherwise 200kbs

BHH

Thanks for the answer.

I tried this last night:

ffmpeg -i test.mov -b 8000 test.wmv

But it didnt have whatsoever effect on the output. Am I using the switch correctly or was the value simply too high.

better to write 8000k :

ohh I missed the K. Makes sense. I give it a go tonight. :

Many Thanks

On a second thought, is there any tool that could read my MOV file and letting me know how much bitrate its encoded in first place. so that I match the WMV s output s bitrate as the same value as the MOV input file.

try with mediainfo

or.. but i don t know if works with wmv codec try the -sameq switch

With this commandline, ffmpeg defaults to its msmpeg4 v3 encoder. FFmpeg also has wmv1 Windows Media Video v7 and wmv2 WMV v8 codecs but they have pretty much the same quality as msmpeg4. There are no wmv3 WMV v9 or VC-1 encoders -- use Microsoft s tools for them.

In addition to using a higher bitrate, you should also encode in 2-pass mode -pass 1 for the first pass and -pass 2 for the second. There are also many encoding parameters to tweak. FFmpeg FAQ suggests these for high-quality MPEG-4 encoding SEC26 :

-mbd rd -flags 4mv aic -trellis 2 -cmp 2 -subcmp 2 -g 300

Why do you want to encode to WMV, is there some device you re targeting, or perhaps Silverlight.

Hi,

Thanks for your response.

Hmm I think its because MS doesn t like anyone else using their encoding. Hence the old maybe still free version of WMV v3. Hmmm I will try your settings tonight and hope its good quality. But how could I use MS tools. MS doesn t like MOV and Quicktime Pro doesnt like WMV. So I would have to make a 2 pass XVID avi and then convert it with a MS tool but where do I get it. to WMV, right.

Actually no. I am so used to MS Movie Maker 2.6, and my Lumix DIgital Camera records in MOV. Movie Maker can t read MOV nor XVID Avis. I have to fallback to WMV. Unless there is any other free authoring tool like Movie Maker, I have no choice.

Thanks

Hmm I think its because MS doesn t like anyone else using their encoding.

Nope, it s just because nobody has bothered to write an encoder for FFmpeg. I d guess Microsoft would be only happy to see more support for their formats.

But how could I use MS tools. MS doesn t like MOV and Quicktime Pro doesnt like WMV.

See the WMV9/VC-1 sticky 112634. For example, WMNicEnc uses AviSynth for input, so it should work with your files. This might be a bit more tricky than using ffmpeg though, and definitely much slower.

Actually no. I am so used to MS Movie Maker 2.6, and my Lumix DIgital Camera records in MOV. Movie Maker can t read MOV nor XVID Avis. I have to fallback to WMV.

Ok, since you don t really need a specific size or high compression, it is better to encode with a constant quantizer instead of setting an average bitrate. Use -qscale 3 msmpeg4 might overflow if -qscale 2 was used. That gives you decent quality for every source.

Unless there is any other free authoring tool like Movie Maker, I have no choice.

It depends on what you need exactly. AviDemux is a nice VirtualDub-like tool that should do some of the things Movie Maker does and a lot more. Then there s Kdenlive, which should be quite similar to Movie Maker, but it only works on Linux/ BSD for now.

Hi nm,

I have tried many things. But situation is still far from resolved.

I have downloaded WMNicEnc and installed also AviSynth. However the former accepts only AVS files encoded in AviSynth. I have no idea how to encode in that. I googled a bit and apparently Virtualdubmod should be able to do that, but it couldn t. It doesnt allow MOV files to be as input. It is a vicious circle.

-qscale is not recognized for some reason. Didnt change anything. It worked with -b 27000. Its same quality as MOV and same size. However it still cannot be opened by Movie Maker. What a crap has MS produced there again. Oh man.

I downloaded AviDemux, but didnt understand what I could there really. I checked out a video about Kdenlive and must say it looks really good and close to Movie Maker. A pity I understand so little about Linux. And installing an OS just a tool is too much.

Stuck again :

-sameq didnt work. However the tip with Mediainfo was very good. i figured out its 27000k bit. So I did a -b 27000k and quality and size are the same. Its wonderful.

However the way the file is produced isn t MS friendly. Movie Maker 2 rejects the file. Damn it. :

Inspector.Gadget

You can try to load MOV files into an Avisynth script with DirectShowSource, DSS2, ffmpegsource, or QTSource. The first two options require QT Lite or Quicktime Alternative, the third requires only the plugin, and the last requires Quicktime.

I have downloaded WMNicEnc and installed also AviSynth. However the former accepts only AVS files encoded in AviSynth. I have no idea how to encode in that.

AVS files are scripts: text files that control AviSynth. You need to write one yourself with a text editor or AvsP

Perhaps Movie Maker doesn t like msmpeg4 in WMV, only in AVI. Try these instead:

ffmpeg -i test.mov -vcodec msmpeg4 -qscale 3 test.avi

ffmpeg -i test.mov -vcodec wmv2 -qscale 3 test.wmv

6th June 2009,

Thanks for the answer. I have downloaded DirectShowSource. I hope this is correct: result

Now, if I start AvsP, it should see MOV extensions. but it still doesn t. neither can VirtualDub see the MOV extension. What do I have to do next please.

hi,

The first one doesnt execute due missing parameters but the second one is running fine and yet it cant be loaded into MM. :

I have downloaded AVsP as you suggested. But it only accepts AVIs as input. It doesnt accept a MOV file. The plugins from above such as DirectShowSource, still didnt help.

Does it work this way on your system. What am I missing.

That s not the software you need. DirectShowSource is a built-in Avisynth function that uses the same filters that your media players would use to load files. Please read the Avisynth documentation, it isn t that difficult to write a script calling DirectShowSource.

DirectShowSource assumes you have a MOV splitter and at least ffdshow s compatible audio and video decoders enabled

DirectShowSource F: test.mov, fps 24, pixel_type YV12

DSS2

DSS2 F: test.mov use if DSS doesn t deliver correct frames

QTSource needs Quicktime 7

with audio in many cases possible with QuickTime 7

QTInput FileName.mov, color 2, audio true

ffmpegsource2

FFmpegSource2 source.mov

benwaggoner

In fact we would. But VC-1 isn t really our codec any more; it s licensed by MPEG-LA with SMPTE as the standardization body. FFmpeg supporting that wouldn t be any different than it doing MPEG-2 or H.264.

There are a number of 3rd party VC-1 implementations, and several more in active development. Elemental Technologies has one they announced at NAB, and Enciris has a very cool looking one that can do two 1080p60 live streams using a FPGA.

And FWIW, this would be a LOT easier with the 30-day trial version of Expression Encoder 2, which has a nice GUI, QuickTime source support, and the best VC-1 implementation available at the moment.

WoW, I cant express my gratitude in words. It actually worked.

No Quality loss at 720HD, simply importing the mov file and encoding it into WMV. Movie maker understood the output and could import it as well.

Amazing. The only downside is the price. I dont need all the functionality but only importing MOV to WMV.

200 is a lot money for just a converter for a personal home user. I could as well buy for only 119 Adobe Premiere Elements, which can import MOV files straight away and provides a lot more functionality than Movie Maker on top of it.

We had a big discussion here a few months ago about the importance of having a free encoder for consumer scenarios, like Windows Media Encoder. You re quite right that there s a big market who need encoding but don t need to pay 199 for it. Given the age of Windows Media Encoder, it either needs a big upgrade or a replacement, and whatever we do really should have a no-cost option.

So, enjoy the trial version; maybe we ll get a better pricing model for consumer use figured out before your 30 days are up .

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Cross-platform solution to record, convert and stream audio and video. It includes libavcodec - the leading audio/video codec library.