From: Kevin Yager I am using an MPEG 1 steam encoder called ffmpeg to encode from a Hauppauge PVR. I can run xawtv and it works just fine ( though I need to boot in windows in order to get sound enabled.. ) I can switch video sources, change channels and so on. ffmpeg was set up to use a bttv video card and always got its signal from composite1. I succesfully added code so it will set the input source to Televison, and set the channel before it starts encoding. I can run this and it works just fine. I added more code to allow ffmpeg to change channels WHILE IT IS encoding, after startup. This doesn't work so well. It's flakey, acts as though it can't change while it is encoding. I'm using ioctl(video_fd,VIDIOCSFREQ,&chan) to set the channel, and then using VIDIOCGFREQ to query it. It seems to "take" the new frequency, but the encoder just keeps on grinding away on that old channel, as if nothing has changed. Does anyone have any ideas on what I am doing wrong? Do I need to do something else in order to let the change take effect? Any ideas or suggestions on how to troubleshoot this will be appreciated. Thanks Kevin PS: here is some information about the system this is on: [yager@tesla yager]$ uname -a Linux tesla 2.4.7-10custom #2 Wed Apr 3 16:59:25 EST 2002 i686 unknown [root@tesla log]# grep -i bttv mess* messages.1:Jun 3 11:34:14 tesla kernel: bttv: driver version 0.7.91 loaded messages.1:Jun 3 11:34:14 tesla kernel: bttv: using 2 buffers with 2080k (4160k total) for capture messages.1:Jun 3 11:34:14 tesla kernel: bttv: Host bridge is Intel Corporation 82820 820 (Camino) Chipset Host Bridge (MCH) messages.1:Jun 3 11:34:14 tesla kernel: bttv: Bt8xx card found (0). messages.1:Jun 3 11:34:14 tesla kernel: bttv0: Bt878 (rev 17) at 02:01.0, irq: 9, latency: 128, mmio: 0xefffe000 messages.1:Jun 3 11:34:14 tesla kernel: bttv0: detected: Hauppauge WinTV/PVR [card=10], PCI subsystem ID is 0070:4500 messages.1:Jun 3 11:34:14 tesla kernel: bttv0: using: BT878(Hauppauge (bt878)) [card=10,insmod option] messages.1:Jun 3 11:34:14 tesla kernel: bttv0: Hauppauge/Voodoo msp34xx: reset line init [5] messages.1:Jun 3 11:34:14 tesla kernel: bttv0: i2c attach [client=MSP3435G-B6,ok] messages.1:Jun 3 11:34:14 tesla kernel: bttv0: i2c attach [client=Philips NTSC,ok] messages.1:Jun 3 11:34:14 tesla kernel: bttv0: Hauppauge eeprom: model=45231, tuner=Philips FM1236 (2), radio=yes messages.1:Jun 3 11:34:14 tesla kernel: bttv0: i2c: checking for MSP34xx @ 0x80... found messages.1:Jun 3 11:34:15 tesla kernel: bttv0: i2c: checking for TDA9875 @ 0xb0... not found messages.1:Jun 3 11:34:15 tesla kernel: bttv0: i2c: checking for TDA7432 @ 0x8a... not found messages.1:Jun 3 11:34:15 tesla kernel: bttv0: registered device video0 messages.1:Jun 3 11:34:15 tesla kernel: bttv0: registered device vbi0 messages.1:Jun 3 11:34:15 tesla kernel: bttv0: registered device radio0 messages.1:Jun 3 11:34:15 tesla kernel: bttv0: PLL: 28636363 => 35468950 ... ok messages.1:Jun 3 11:42:22 tesla kernel: bttv0: PLL: switching off messages.1:Jun 3 11:57:00 tesla kernel: bttv0: irq: SCERR risc_count=0f3b1810 messages.1:Jun 3 11:57:00 tesla kernel: bttv0: irq: SCERR risc_count=0f3b1808
