add support for 3gp

[pmlopes]

This is a video format common on some Android devices and supported by ffmpeg so I guess it could be easily added to sigal.

[saimn]

Do you mean in input or output ?
As an output format, I don't think 3gp is supported by the <video> tag.
As input, every format that is supported by ffmpeg should already be supported, and will be converted to webm or mp4.

[pmlopes]

Sorry for the confusion, I mean input only. The fix is easy as add the extension to two places.

[saimn]

Ah yes indeed, it should be added to the list of extensions.

[saimn]

@pmlopes - Done, if you want to test.

[pmlopes]

Works 👍