how to convert wmv to mp4?

[jqzw]

hi,who can tell me how to conver wmv to mp4? I think, first decoder wmv file to get the yuv or rgb data and the audio data,and then encode the data decoded by wmv decoder .my problem is how i can get wmv decoder? or could you tell me another solution to the problem? thanks.

[bond]

create an avisynth script with
directshowsource("c:\path to\input.wmv",fps=23.976) use whatever framerate the wmv has of course

if you can see the video when opening that .avs in virtualdub everything worked ok and you can feed x264 with it (eg via megui)

if you dont see the video you propably also cant see it in a directshow player (like media player classic), which means you need to install the dshow filters from m$

[jqzw]

create an avisynth script with

Code:
directshowsource("c:\path to\input.wmv",fps=23.976)


use above method,can i get the decoded data? I prefer to get the decoded data first ,then encode the data to the file format I want. so how can I get the decoded wmv data? thanks a lot!

[bond]

why do you need the data in a file? avisynth is a frameserver, which means the decoder decodes the data and it gets right away passed to the encoder, without the need to create a raw video file inbetween

if you still want the raw .yuv file you can use the avs2yuv tool (google) with the -raw switch

[jqzw]

thank bond!

i will try it.

thanks

[jqzw]

i tried it,but i can only get the raw video data and the video data is not correct :(

[bond]

i tried it,but i can only get the raw video data and the video data is not correct :(why do you think so?

[SenorKaffee]

I don´t think there is a way to just remux a WMV file in the MP4 container.
So use AVISynth and then open it in MEGui. Both tools are heavily used in the forums.


DirectShowSource("D:\Downloads\kh2prom.WMV")
ConvertToYV12

[SeeMoreDigital]

The newest version of VirtualDub-MPEG2 will open WMV files now.

Once there and with the correct filters, you should be able to re-encode WMV to MPEG-4 in AVI. The WMA audio stream would have to be re-encoded to AAC separately.

Both new streams could then be muxed into the .MP4 container using YAMB

[bond]

jqzw, read the rules again, no double post

striked and merged

[jqzw]

is there someone familar with directshow? can I use directshow get the decoded wmv data ?

[bond]

doesnt this answer your question:

create an avisynth script with
directshowsource("c:\path to\input.wmv",fps=23.976) use whatever framerate the wmv has of course

if you can see the video when opening that .avs in virtualdub everything worked ok and you can feed x264 with it (eg via megui)

if you dont see the video you propably also cant see it in a directshow player (like media player classic), which means you need to install the dshow filters from m$

[dyssident]

doesnt this answer your question:

man i love this forum. answered my question before i even had a chance to start mumbling to myself about how much i hate microsoft.

now i just have to figure out the audio encoding. since besweet cant use wma as a source, maybe ill just dump to pcm then encode that.

or i could do something crazy like search this forum for the answer.

[LoRd_MuldeR]

I have experienced that most WMV files get unsynchron in VirtualDub-MPEG2. So I usually use that tool called "ASF Tools", which can directly convert WMV files to AVI (synchron!). So far this seems to work fine and it doesn't need to re-encode the video. AVI is not MP4, but I think this could be the first step. Converting the AVI to MP4 should not be so hard...