O som gravado do microfone é muito rápido

Question

Estou usando o Kazam para gravar vídeos. Mas quando vejo o vídeo, noto que o som gravado é muito mais rápido do que eu falo (como 10s voltaram para 2s). Eu tentei software RecordMyDesktop mas ainda o mesmo problema. Às vezes funciona normalmente, mas não o mesmo som que foi rápido.

Eu tentei alterar o fps de 15 para 5 ou de 15 para 30, mas continua o mesmo. Eu estou gravando com o microfone de uma webcam (veja a imagem abaixo). Claro que não estou usando o "Built-in Audio Stereo Analog". Todos os detalhes estão nas imagens abaixo.

Desculpe pelo meu mau inglês.

Estaéasaídadepacmdlist-sources

3source(s)available.index:0name:<alsa_output.pci-0000_00_1b.0.analog-stereo.monitor>driver:<module-alsa-card.c>flags:DECIBEL_VOLUMELATENCYDYNAMIC_LATENCYstate:IDLEsuspendcause:priority:1950volume:front-left:65536/100%/0.00dB,front-right:65536/100%/0.00dBbalance0.00basevolume:65536/100%/0.00dBvolumesteps:65537muted:nocurrentlatency:0.00msmaxrewind:64KiBsamplespec:s16le2ch44100Hzchannelmap:front-left,front-rightStereousedby:0linkedby:0configuredlatency:371.52ms;rangeis0.50..371.52msmonitor_of:0card:0<alsa_card.pci-0000_00_1b.0>module:6properties:device.description="Monitor of Built-in Audio Analog Stereo"
    device.class = "monitor"
    alsa.card = "0"
    alsa.card_name = "HDA Intel"
    alsa.long_card_name = "HDA Intel at 0xe04c0000 irq 24"
    alsa.driver_name = "snd_hda_intel"
    device.bus_path = "pci-0000:00:1b.0"
    sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
    device.bus = "pci"
    device.vendor.id = "8086"
    device.vendor.name = "Intel Corporation"
    device.product.id = "27d8"
    device.product.name = "NM10/ICH7 Family High Definition Audio Controller"
    device.form_factor = "internal"
    device.string = "0"
    module-udev-detect.discovered = "1"
    device.icon_name = "audio-card-pci"
  * index: 1
    name: <alsa_input.pci-0000_00_1b.0.analog-stereo>
    driver: <module-alsa-card.c>
    flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: IDLE
    suspend cause: 
    priority: 9959
    volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
            balance 0.00
    base volume: 17106 /  26% / -35.00 dB
    volume steps: 65537
    muted: no
    current latency: 130.77 ms
    max rewind: 0 KiB
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 Stereo
    used by: 0
    linked by: 0
    configured latency: 371.52 ms; range is 0.50 .. 371.52 ms
    card: 0 <alsa_card.pci-0000_00_1b.0>
    module: 6
    properties:
        alsa.resolution_bits = "16"
        device.api = "alsa"
        device.class = "sound"
        alsa.class = "generic"
        alsa.subclass = "generic-mix"
        alsa.name = "ALC260 Analog"
        alsa.id = "ALC260 Analog"
        alsa.subdevice = "0"
        alsa.subdevice_name = "subdevice #0"
        alsa.device = "0"
        alsa.card = "0"
        alsa.card_name = "HDA Intel"
        alsa.long_card_name = "HDA Intel at 0xe04c0000 irq 24"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:1b.0"
        sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
        device.bus = "pci"
        device.vendor.id = "8086"
        device.vendor.name = "Intel Corporation"
        device.product.id = "27d8"
        device.product.name = "NM10/ICH7 Family High Definition Audio Controller"
        device.form_factor = "internal"
        device.string = "front:0"
        device.buffering.buffer_size = "65536"
        device.buffering.fragment_size = "32768"
        device.access_mode = "mmap+timer"
        device.profile.name = "analog-stereo"
        device.profile.description = "Analog Stereo"
        device.description = "Built-in Audio Analog Stereo"
        alsa.mixer_name = "Realtek ALC260"
        alsa.components = "HDA:10ec0260,103c3011,00100400"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    ports:
        analog-input-mic: Microphone (priority 8700, latency offset 0 usec, available: unknown)
            properties:
                device.icon_name = "audio-input-microphone"
        analog-input-linein: Line In (priority 8100, latency offset 0 usec, available: no)
            properties:

active port: <analog-input-mic>
index: 2
name: <alsa_input.usb-046d_0825_20169E00-02.analog-mono>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: IDLE
suspend cause: 
priority: 9049
volume: mono: 85979 / 131% / 7.07 dB
        balance 0.00
base volume: 20724 /  32% / -30.00 dB
volume steps: 65537
muted: no
current latency: 69.22 ms
max rewind: 0 KiB
sample spec: s16le 1ch 48000Hz
channel map: mono
             Mono
used by: 0
linked by: 0
configured latency: 2000.00 ms; range is 0.50 .. 2000.00 ms
card: 1 <alsa_card.usb-046d_0825_20169E00-02>
module: 7
properties:
    alsa.resolution_bits = "16"
    device.api = "alsa"
    device.class = "sound"
    alsa.class = "generic"
    alsa.subclass = "generic-mix"
    alsa.name = "USB Audio"
    alsa.id = "USB Audio"
    alsa.subdevice = "0"
    alsa.subdevice_name = "subdevice #0"
    alsa.device = "0"
    alsa.card = "1"
    alsa.card_name = "USB Device 0x46d:0x825"
    alsa.long_card_name = "USB Device 0x46d:0x825 at usb-0000:00:1d.7-6, high speed"
    alsa.driver_name = "snd_usb_audio"
    device.bus_path = "pci-0000:00:1d.7-usb-0:6:1.2"
    sysfs.path = "/devices/pci0000:00/0000:00:1d.7/usb1/1-6/1-6:1.2/sound/card1"
    udev.id = "usb-046d_0825_20169E00-02"
    device.bus = "usb"
    device.vendor.id = "046d"
    device.vendor.name = "Logitech, Inc."
    device.product.id = "0825"
    device.product.name = "Webcam C270"
    device.serial = "046d_0825_20169E00"
    device.form_factor = "webcam"
    device.string = "hw:1"
    device.buffering.buffer_size = "192000"
    device.buffering.fragment_size = "96000"
    device.access_mode = "mmap+timer"
    device.profile.name = "analog-mono"
    device.profile.description = "Analog Mono"
    device.description = "Webcam C270 Analog Mono"
    alsa.mixer_name = "USB Mixer"
    alsa.components = "USB046d:0825"
    module-udev-detect.discovered = "1"
    device.icon_name = "camera-web-usb"
ports:
    analog-input-mic: Microphone (priority 8700, latency offset 0 usec, available: unknown)
        properties:
            device.icon_name = "audio-input-microphone"
active port: <analog-input-mic>