In short: Is it normal that I can use the v4l2-ctl command to adjust brightness, saturation, hue, etc but not to adjust more interesting parameters like bitrate, aspect ration, etc? Working: pi@raspberrypi:~ $ cat /sys/class/pvrusb2/sn-4034395926/ctl_hue/cur_val 0 pi@raspberrypi:~ $ v4l2-ctl -c hue=1 pi@raspberrypi:~ $ cat /sys/class/pvrusb2/sn-4034395926/ctl_hue/cur_val 1 Not working: pi@raspberrypi:~ $ cat /sys/class/pvrusb2/sn-4034395926/ctl_video_bitrate/cur_val 6000000 pi@raspberrypi:~ $ v4l2-ctl -c bitrate=6000000 unknown control 'bitrate' pi@raspberrypi:~ $ v4l2-ctl -c video_bitrate=6000000 unknown control 'video_bitrate' pi@raspberrypi:~ $ v4l2-ctl -c ctl_video_bitrate=6000000 unknown control 'ctl_video_bitrate' the pvrusb2 driver has created all sysfs parameters and they work using the "echo" method but I thought this was also the purpose of the v4l2-ctl command, correct? Some details, let me know if you need more. Regards, Koen pi@raspberrypi:~ $ uname -a Linux raspberrypi 4.4.13+ #894 Mon Jun 13 12:43:26 BST 2016 armv6l GNU/Linux pi@raspberrypi:~ $ pi@raspberrypi:~ $ v4l2-ctl --all Driver Info (not using libv4l2): Driver name : pvrusb2 Card type : WinTV HVR-1900 Model 73xxx Bus info : usb-20980000.usb-1.3 Driver version: 4.4.13 Capabilities : 0x81270001 Video Capture Tuner Audio Radio Read/Write Extended Pix Format Device Capabilities Device Caps : 0x01230001 Video Capture Tuner Audio Read/Write Extended Pix Format Priority: 2 Frequency for tuner 0: 980 (61.250000 MHz) Tuner 0: Name : Capabilities : 62.5 kHz multi-standard stereo lang1 lang2 freq-bands Frequency range : 44.000 MHz - 958.000 MHz Signal strength/AFC : 0%/0 Current audio mode : stereo Available subchannels: mono lang2 Video input : 0 (television: ok) Audio input : 0 (PVRUSB2 Audio) Video Standard = 0x00000000 Format Video Capture: Width/Height : 720/480 Pixel Format : '' Field : Interlaced Bytes per Line: 0 Size Image : 32768 Colorspace : Unknown (00000000) Flags : Crop Capability Video Capture: Bounds : Left 0, Top 0, Width 0, Height 0 Default : Left 0, Top 0, Width 0, Height 0 Pixel Aspect: 0/0 Crop: Left 0, Top 0, Width 720, Height 480 Streaming Parameters Video Capture: Frames per second: 25.000 (25/1) Read buffers : 2 brightness (int) : min=0 max=255 step=1 default=128 value=128 contrast (int) : min=0 max=127 step=1 default=68 value=68 saturation (int) : min=0 max=127 step=1 default=64 value=64 hue (int) : min=-128 max=127 step=1 default=0 value=0 volume (int) : min=0 max=65535 step=1 default=62000 value=62000 balance (int) : min=-32768 max=32767 step=1 default=0 value=0 bass (int) : min=-32768 max=32767 step=1 default=0 value=0 treble (int) : min=-32768 max=32767 step=1 default=0 value=0 mute (bool) : default=0 value=0 dmesg output: [ 4.162258] scsi host0: usb-storage 1-1.2:1.0 [ 4.258220] usb 1-1.3: new high-speed USB device number 5 using dwc_otg [ 4.382814] usb 1-1.3: New USB device found, idVendor=2040, idProduct=7300 [ 4.391713] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 4.400866] usb 1-1.3: Product: WinTV [ 4.406259] usb 1-1.3: Manufacturer: Hauppauge [ 4.412471] usb 1-1.3: SerialNumber: 7300-00-F077FF16 ... [ 10.463517] media: Linux media interface: v0.10 [ 10.547654] Linux video capture interface: v2.00 [ 10.660771] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) [ 10.781359] pvrusb2: Hardware description: WinTV HVR-1900 Model 73xxx [ 10.798664] usbcore: registered new interface driver pvrusb2 [ 10.798702] pvrusb2: V4L in-tree version:Hauppauge WinTV-PVR-USB2 MPEG2 Encoder/Tuner [ 10.798721] pvrusb2: Debug mask is 1 (0x1) [ 11.484744] systemd-journald[117]: Received request to flush runtime journal from PID 1 [ 11.782401] pvrusb2: Device microcontroller firmware (re)loaded; it should now reset and reconnect. [ 11.974683] usb 1-1.3: USB disconnect, device number 5 [ 13.748236] usb 1-1.3: new high-speed USB device number 6 using dwc_otg [ 13.858748] usb 1-1.3: New USB device found, idVendor=2040, idProduct=7300 [ 13.858790] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 13.858810] usb 1-1.3: Product: WinTV [ 13.858827] usb 1-1.3: Manufacturer: Hauppauge [ 13.858844] usb 1-1.3: SerialNumber: 7300-00-F077FF16 [ 13.868612] pvrusb2: Hardware description: WinTV HVR-1900 Model 73xxx [ 13.921561] pvrusb2: Binding ir_rx_z8f0811_haup to i2c address 0x71. [ 13.921787] pvrusb2: Binding ir_tx_z8f0811_haup to i2c address 0x70. [ 14.099430] cx25840 3-0044: cx25843-24 found @ 0x88 (pvrusb2_a) [ 14.118546] pvrusb2: Attached sub-driver cx25840 [ 14.415416] tuner 3-0042: Tuner -1 found with type(s) Radio TV. [ 14.415503] pvrusb2: Attached sub-driver tuner ... [ 16.664488] cx25840 3-0044: loaded v4l-cx25840.fw firmware (16382 bytes) [ 16.786299] tveeprom 3-00a2: Hauppauge model 73219, rev D2F5, serial# 4034395926 [ 16.786337] tveeprom 3-00a2: MAC address is 00:0d:fe:77:ff:16 [ 16.786356] tveeprom 3-00a2: tuner model is NXP 18271C2 (idx 155, type 54) [ 16.786377] tveeprom 3-00a2: TV standards PAL(B/G) PAL(I) SECAM(L/L') PAL(D/D1/K) ATSC/DVB Digital (eeprom 0xf4) [ 16.786393] tveeprom 3-00a2: audio processor is CX25843 (idx 37) [ 16.786410] tveeprom 3-00a2: decoder processor is CX25843 (idx 30) [ 16.786426] tveeprom 3-00a2: has radio, has IR receiver, has IR transmitter [ 16.786522] pvrusb2: Device initialization completed successfully. [ 16.833872] pvrusb2: registered device video0 [mpeg] [ 16.833917] DVB: registering new adapter (pvrusb2-dvb) [ 17.724319] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup [ 17.725055] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 19.185810] cx25840 3-0044: loaded v4l-cx25840.fw firmware (16382 bytes) [ 19.318894] tda829x 3-0042: setting tuner address to 60 [ 19.336993] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1 [ 19.348636] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 19.408700] tda18271 3-0060: creating new instance [ 19.458819] TDA18271HD/C2 detected @ 3-0060 [ 20.358789] tda18271: performing RF tracking filter calibration [ 39.498969] tda18271: RF tracking filter calibration complete [ 39.568994] tda829x 3-0042: type set to tda8295+18271 [ 46.439239] cx25840 3-0044: 0x0000 is not a valid video input! [ 46.498783] usb 1-1.3: DVB: registering adapter 0 frontend 0 (NXP TDA10048HN DVB-T)... [ 46.507172] tda829x 3-0042: type set to tda8295 [ 46.547113] tda18271 3-0060: attaching existing instance -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html