[FFmpeg-user] Help needed to work around incorrect DTS when capturing H264 from a Logitech C920

[Peter Rabbitson]

On 12/16/2014 01:11 PM, Carl Eugen Hoyos wrote:
> Peter Rabbitson <rabbit+list <at> rabbit.us> writes:
>
>>> I've used Logitech C920 and noticed that the camera
>>> drops it's frame rate without signaling it.
>
> Then "-r" is definitely wrong: It assumes a constant
> from rate.
>

Does ffmpeg even have a provision for "variable frame rate" input? I.e. 
"blindly trust the PTS values"?