I'm using a Hauppauge WinTV-HVR 1900 under Ubuntu 04.10 LTS. This device needs a 16 KB firmware, so I had to compile the pvrusb2 kernel module.
The device works reasonably well, except for the following problem: A few weeks ago, I made my first timer-controlled recordings (from the composite input) using crontab, simply by copying /dev/video0 to a file. Every 20 - 30 recordings, the audio is distorted. This distortion remains during the entire recording. The next recording (with the same audio settings) is normal again. I wrote a small stress test script which records small files with a duration of 30 secs with a pause of 10 secs. The result is similar: Most recordings are ok. Audio distortion in every 20th to 30th file. Lowering the v4l2 volume setting had no effect. I was able to test a second unit, with similar results. The distortion does not sound like clipping (audio input level too high). I presume the audio encoder in the device does not start properly at times. Is this a known problem? Any hints on how to prevent it? My current work-around is a script that "records" all the time, but only writes to disk according to a time schedule. I create a test file after starting the script. If the distortion is present (which happens here as well), I restart the script (thus closing and reopening the connection to /dev/video0). If the audio is clear, all other recordings during that session are ok, too (at least so far). Mike _______________________________________________ pvrusb2 mailing list [email protected] http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
