Why is the resulting file unplayable when I use FFMPEG to convert a MP4 video to ASF?

Posted by Fuupoo on Super User See other posts from Super User or by Fuupoo
Published on 2013-07-03T16:22:53Z Indexed on 2013/07/03 17:09 UTC
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I want to convert an .mp4 file to an .asf file, but I need to keep the size of the file below 150 mb (the server I need to upload the file to can only take files under 150 mb). Basically I want to recontain the .mp4 in an .asf file. The code I'm using currently is

ffmpeg input.mp4 -c copy output.asf

The command runs, however when I try to play the file on windows media player (I'm on windows xp) I get an error message saying "Windows media player has encountered a problem while playing the file."

Anyone have any idea why this is happening? And what other ways I can accomplish this task?

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