On 20-Sep-2002 Bob McElrath wrote: | Ralf Oehler [R.Oehler@xxxxxxxxxx] wrote: | > Hello, List. | > | > I managed to record a video from TV to disk with lavrec now. | > Works. | > Only one stain left: When I record without sound, I get no | > lost/deletet/inserted frames at all. Great. | > When I record sound, too, I get inserted frames. (20-30 frames per | > 10 | > seconds) Every few seconds, without rhythm, the record-time-display | > stops | > for a few frames, then continues. A few tenths of a second the | > inserted-frames-count increases a few frames. When playing the video | > with | > lavplay or mplayer the video jumps at theese places. | | And when you record without sound it plays ok too? No skips? Perfect video if no sound. (at least over the 30 seconds I tried) | | Mjpeg folks: do we look for vblank interrupts when doing software | encoding? I know NuppelVideo was hacked up to somehow get | frame-accurate info out of bttv cards. Do we do that too? If not, | this | is meaningless since sync info is only generated when there is audio | present. (and this would be a nice feature to add) | | > The effect occures with the same strength with OSS, with ALSA, and | > independently of sample rate/width. | > | > Hardware: K6-III/450, 512MB, WinTV-GO(bt878), SB128(es1371) | > CPU-Load while recording is never higher than 50% | | Can you reliably record audio-only with a tool like 'record'? Yes. I digitized many hours of music cassettes via this sound card without any problem. And the audio output of WinTV is only another analog input for the soundcard. | | Your CPU is probably barely able to handle this. On my computer the | driver uses up a lot of CPU so I see around 50% load, but this is | meaningless since the driver uses the other 50%. (600 MHz alpha, was But xosview does NOT show 50 "red" percents for system activity. And "top" shows 50% idle. So I think the driver does not use the remaining 50%, or am I wrong? | on | the market about the same time as yours, but is probably a bit | faster...i remember deciding between the K6-III and the alpha) | | Cheers, | -- Bob -- -------------------------------------------------------------------------- | Ralf Oehler | | GDA - Gesellschaft fuer Digitale _/ | Archivierungstechnik mbH & CoKG _/ | Ein Unternehmen der Bechtle AG #/_/_/_/ _/_/_/_/ _/_/_/_/ | _/ _/ _/ _/ _/ | E-Mail: R.Oehler@xxxxxxxxxx _/ _/ _/ _/ _/ _/ | Tel.: +49 6182-9271-23 _/_/_/_/ _/_/_/#/ _/_/_/#/ | Fax.: +49 6182-25035 _/ | Mail: GDA, Bensbruchstraße 11, _/_/_/_/ | D-63533 Mainhausen | HTTP: www.GDAmbH.com -------------------------------------------------------------------------- time is a funny concept
