wrong contentType

[fxp]

I check the contentType of the video file with "file"
the output is just "data"

file test.mp4
testtest.mp4: data

[fent]

Where does the error come from?

[fxp]

Just convert a m3u8 to mp4 with

const stream = m3u8stream(url);
let videoFile = 'testtest.mp4';
stream.pipe(fs.createWriteStream(videoFile));
stream.on('progress', (segment, totalSegments, downloaded) => {
  console.log('m3u8 segment downloaded', segment.num, '/', totalSegments);
});
stream.on('error', (e) => {
  reject(e);
})
stream.on('end', () => {
  resolve(videoFile);
})

when I test the mp4 file with file testtest.mp4 I got "testtest.mp4: data"

[fent]

sorry for really late reply, what's the url?