capturing analog-tv with h.264 on the fly possible?

[servass]

has anyone ever tried this? which codec?

I know, it needs tought hardware, but also this is ok, my encoded file is corrupt.

[chipzoller]

I suppose you could provided your hardware is really fast (including a capture card that does most of it's work on-board instead of off-loading work to the CPU) in lossless mode. No matter what you do, you'll probably have to re-encode some point down the line to further compress. AVC right now is too intense for on-the-fly final recording I believe.

[servass]

yesterday I did capturing on the fly from tv-analog-card with lead h.264. it was no problem. only cpu-power is needed. but this h.264 codec did no better work than xvid. h.264 only a medienhype?

[chipzoller]

At this point I don't think the major focus is optimizing the codec for on-the-fly compression but rather in-depth modes. This is why I capture using HuffYUV and then recompress later with something like a 1-pass xvid if space is becoming an issue.

[servass]

I tested encoding on the fly and also on the "ground" - 1 pass, between 200 kbs .... 1000 kbs. result
pic-quality same as xvid. h.264 is smoother but not more details artefacts one moving-scenes same as xvid.

cpu-power: 2.. 3 x Xvid

codec: lead 264, mainconcept, x264.

I hope my experience is not representatively. If someone had better experience, please tell me. :D

[Blue_MiSfit]

Using x264 (IMO the best H.264 codec out there), You could capture using CRF mode at like 15-20, and it would probably work for a strong dual core system and SD material - provided you turn down the options a bit. This would probably look better than capturing with XviD.