[FFmpeg-user] Capturing from DVB-T card

Carl Eugen Hoyos cehoyos at ag.or.at
Fri Nov 2 13:03:34 CET 2012


Miroslav Rovis <m.rovis <at> inet.hr> writes:

>  $ ffmpeg  -f pulse -i default -f v4l2 -channel 1 
> -i /dev/video0 Ffm_`date +C%m%d_%H%M`.avi
> ffmpeg version 0.10.5

This is a bit old, BUT...

[...]

> Input #0, pulse, from 'default':
>   Duration: N/A, start: 0.001065, bitrate: N/A

> Input #1, video4linux2,v4l2, from '/dev/video0':
>   Duration: N/A, start: 1351821629.835768, bitrate: 176947 kb/s

the problem is that the start times are incompatible;-(

The problem was reported before, I cannot reproduce it 
(since here, the start times are both in the same range), 
you could try alsa instead of pulse (but that is just 
guessing).

The v4l2 input driver has a few timestamp options (see 
ffmpeg -h full and search for "V4L2 indev AVOptions"), 
I don't know if they help in your case, testing and 
feedback would be very welcome!

Carl Eugen



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