MythTV PVR-250 settings
For posterity, the resolutions and bitrates I’m now using for recording shows with the PVR-250 on my MythTV box. The “Low Quality” setting is definitely degraded, but watchable; probably because of the reduced resolution more than the reduced bitrate. The “High Quality” setting looks to be good enough for DVD transfers. “Default” produces files that are about 1.5G/hour (my old settings were producing 2.2G/hour, so this will let me record more stuff). I may change them some more, of course…
| *profile* | *resolution* | *bitrate* (avg/max) | *audio sample* | *audio bitrate* |
| Default | 720×480 | 4000/5000 | 48K | 224K |
| High Quality | 720×480 | 6000/6500 | 48K | 384K |
| Low Quality | 320×480 | 2000/2200 | 32K | 192K |
| Default | 720×480 | 4000/5000 | 48K | 224K |
| Old Default | 480×480 | 4500/6000 | 32K | 320K |
I’ve read that the audio settings don’t make any difference with the PVR-250, only the “master” bitrate. Whatever :)
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Given current CPU speed, is transcoding to DivX or something feasible? That would reduce recording disk usage to about 350 MB/hr.