老虎会游泳

# 开
echo -en '\xA0\x02\x01\xA3' > /dev/ttyUSB1;
# 关
echo -en '\xA0\x02\x00\xA2' > /dev/ttyUSB1

# 安装依赖包
sudo apt install --no-install-recommends --no-install-suggests gstreamer1.0-plugins-bad

export GST_DEBUG=2

VIDEO_DEVICE="/dev/video0"
VIDEO_WIDTH="640"
VIDEO_HEIGHT="480"
VIDEO_FPS="30"

# 视频编码：h264 或 h265
VIDEO_CODEC="h264"

AUDIO_DEVICE="$(pactl get-default-source)"
AUDIO_SAMPLE_RATE="44100"
AUDIO_CHANNEL="2"

# 输出格式：matroska (mkv), mpegts 或 mp4
# 建议使用 matroska 或 mpegts，因为 mp4 未正常结束录制会无法观看
OUTPUT_FORMAT="matroska"
OUTPUT_FILE="./output.mkv"

echo "-------------------------------------"
echo "Video: $VIDEO_DEVICE (resolution: ${VIDEO_WIDTH}x${VIDEO_HEIGHT}, fps: $VIDEO_FPS, codec: $VIDEO_CODEC)"
echo "Audio: $AUDIO_DEVICE (sample rate: $AUDIO_SAMPLE_RATE, channel: $AUDIO_CHANNEL)"
echo "Output: $OUTPUT_FILE (format: $OUTPUT_FORMAT)"
echo "-------------------------------------"

gst-launch-1.0 -e \
    v4l2src device="$VIDEO_DEVICE" \
        ! video/x-raw,width="$VIDEO_WIDTH",height="$VIDEO_HEIGHT",framerate="$VIDEO_FPS"/1 \
        ! tee name=preview \
        ! queue \
        ! videoconvert \
        ! mpp"$VIDEO_CODEC"enc \
        ! "$VIDEO_CODEC"parse \
        ! mx. \
    preview. \
        ! queue \
        ! videoconvert \
        ! autovideosink sync=false \
    pulsesrc device="$AUDIO_DEVICE" \
        ! audio/x-raw,rate="$AUDIO_SAMPLE_RATE",channels="$AUDIO_CHANNEL" \
        ! queue \
        ! audioconvert \
        ! voaacenc \
        ! mx. \
    "$OUTPUT_FORMAT"mux name=mx \
        ! filesink location="$OUTPUT_FILE"