I cannot start recording

[nahuel915]

Hello, first of all thank you for doing this great job!

Since a couple of days I tried to solve all the issues. Unfortunately, I have the following problem: After installing bullseye I followed all the steps and I run picam with my ALSA device name it says "capturing started". But when I run "$ touch hooks/start_record" nothing happens. I took a look in the corresponding folder and there is not file created.

Basically, I want to stream audio and video, so recording is not so important for but I think there is something wrong.

Maybe I am missing something, It would be great if someone can help me.

Thank you!

[iizukanao]

Thank you for your message. To investigate the issue, try running picam with the --verbose option. If touch hooks/start_record command is accepted correctly, you will see a message like start rec to in the picam's verbose output.

[nahuel915]

Thank you iizukanao, sorry if I am doing dumb mistakes I am trying my best.

Below is what I get after the command: pi@babypi:~/picam $ ./picam --alsadev plughw:2,0 -c 2 --verbose

video_width=1920 video_height=1080 video_fps=30.000000 video_pts_step=3000 video_gop_size=30 video_hflip=0 video_vflip=0 video_bitrate=3000000 video_avc_profile=high video_avc_level=4.1 video_qp_min=-1 video_qp_max=-1 video_qp_initial=-1 video_slice_dquant=-1 video_brightness=0 video_contrast=0 video_saturation=0 video_sharpness=0 video_autofocus_mode=continuous video_lens_position=-1.000000 alsa_dev=plughw:2,0 audio_channels=2 audio_sample_rate=48000 audio_bitrate=40000 audio_volume_multiply=1.000000 ng_thresh_volume=1.000000 ng_attack_time=0.200000 ng_hold_time=1.000000 ng_release_time=0.500000 is_hlsout_enabled=0 is_hls_encryption_enabled=0 hls_keyframes_per_segment=1 hls_number_of_segments=3 hls_encryption_key_uri=stream.key hls_encryption_key=0x75b0a81de17487c88a47507a7e1fdf73 hls_encryption_iv=0x000102030405060708090a0b0c0d0e0f hls_output_dir=/run/shm/video rtsp_enabled=0 rtsp_video_control_path=/tmp/node_rtsp_rtmp_videoControl rtsp_audio_control_path=/tmp/node_rtsp_rtmp_audioControl rtsp_video_data_path=/tmp/node_rtsp_rtmp_videoData rtsp_audio_data_path=/tmp/node_rtsp_rtmp_audioData tcp_enabled=0 tcp_output_dest= auto_exposure_enabled=0 auto_exposure_threshold=5.000000 is_vfr_enabled=0 white_balance=auto exposure_control=auto awb_red_gain=0.000000 awb_blue_gain=0.000000 metering=average manual_exposure_compensation=0 exposure_compensation=0.000000 manual_exposure_aperture=0 exposure_aperture=0 manual_exposure_shutter_speed=0 exposure_shutter_speed=0 manual_exposure_sensitivity=0 exposure_sensitivity=0 roi_left=0.000000 roi_top=0.000000 roi_width=1.000000 roi_height=1.000000 min_fps=-1.000000 max_fps=-1.000000 is_timestamp_enabled=0 timestamp_format=%a %b %d %l:%M:%S %p timestamp_layout=15 timestamp_horizontal_margin=10 timestamp_vertical_margin=10 is_timestamp_abs_pos_enabled=0 timestamp_pos_x=0 timestamp_pos_y=0 timestamp_text_align=1 timestamp_font_name=FreeMono:style=Bold timestamp_font_file= timestamp_font_face_index=(null) timestamp_font_points=14.000000 timestamp_font_dpi=96 timestamp_color=ffffff timestamp_stroke_color=000000 timestamp_stroke_width=1 timestamp_letter_spacing=0 is_preview_enabled=0 is_previewrect_enabled=0 preview_x=0 preview_y=0 preview_width=0 preview_height=0 preview_hdmi=0 is_audio_preview_enabled=0 audio_preview_dev=plughw:0,0 record_buffer_keyframes=5 state_dir=state hooks_dir=hooks HDR mode enabled opening ALSA device for capture: plughw:2,0 disable_audio_capturing: 0 final microphone channels: -1 configuring devices Running without preview window Opening camera... [0:30:38.591302234] [1496] INFO Camera camera_manager.cpp:297 libcamera v0.0.5+83-bde9b04f [0:30:38.753451299] [1499] INFO RPI vc4.cpp:437 Registered camera /base/soc/i2c0mux/i2c@1/imx708@1a to Unicam device /dev/media0 and ISP device /dev/media1 Acquired camera 2127774168 Configuring video... [0:30:38.754538767] [1496] INFO Camera camera.cpp:1033 configuring streams: (0) 1920x1080-YUV420 [0:30:38.755150573] [1499] INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1/imx708@1a - Selected sensor format: 2304x1296-SBGGR10_1X10 - Selected unicam format: 2304x1296-pBAA Camera streams configured Available controls: Sharpness : [0.000000..16.000000] ScalerCrop : [(0, 0)/128x128..(0, 0)/4608x2592] AfMetering : [0..1] Contrast : [0.000000..32.000000] Brightness : [-1.000000..1.000000] ExposureValue : [-8.000000..8.000000] NoiseReductionMode : [0..4] AeExposureMode : [0..3] AeConstraintMode : [0..3] AfPause : [0..2] FrameDurationLimits : [33331..56268404] AfRange : [0..2] AfWindows : [(0, 0)/0x0..(65535, 65535)/65535x65535] AfTrigger : [0..1] AwbEnable : [false..true] AwbMode : [0..7] Saturation : [0.000000..32.000000] ColourGains : [0.000000..32.000000] AeEnable : [false..true] LensPosition : [0.000000..32.000000] AnalogueGain : [1.122807..16.000000] ExposureTime : [6..0] AfSpeed : [0..1] AeMeteringMode : [0..3] AfMode : [0..2] Buffers allocated and mapped preview: startPreview begin preview: startPreview end Video setup complete Opened VideoEncoder on /dev/video11 as fd 28 Got 6 output buffers Got 12 capture buffers Codec streaming started Requests created Using crop cfr frame_time=33333 camera_set_metering_mode: average camera_set_exposure_control: auto camera_set_white_balance: auto enable AWB: 0 camera_set_custom_awb_gains: red=0.0, blue=0.0 camera_set_brightness: 0.0 camera_set_contrast: 1.0 camera_set_saturation: 1.0 camera_set_sharpness: 0.0 camera_set_autofocus_mode: continuous Camera started! audio setup sample_rate: 48000 nb_samples: 1024 format: 1 audio_codec_ctx->ch_layout: 4294967297 av_frame->channel_layout: 4294967297 buffer_size=2048 allocated 2048 bytes for audio samples audio_pts_step: 1920 configuring audio capture device audio_sample_rate: 48000 (48000) actual sample rate=48000 dir=0 setting microphone buffer size to 102400 (buffer_size=2048 alsa_buffer_multiply=50) failed to set buffer size for microphone: buffer_size=2048 multiply=50 trying smaller buffer size for microphone: buffer_size=2048 multiply=25 microphone: buffer size: 51200 frames (channels=1 buffer_size=2048 multiply=25) microphone: setting period size to 1024 actual_period_size=1024 dir=0 audio capture device: Plug PCM: Hardware PCM card 2 'Samson Go Mic' device 0 subdevice 0 Its setup is: stream : CAPTURE access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 51200 period_size : 1024 period_time : 21333 tstamp_mode : NONE tstamp_type : MONOTONIC period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 1 stop_threshold : 51200 silence_threshold: 0 silence_size : 0 boundary : 1677721600 appl_ptr : 0 hw_ptr : 0 audio device configured [microphone started]capturing started ............................... 29.75 fps k=1 a-v=4080 c-a=-25254 u=0 d=0 pts=114960 .............................. 28.59 fps k=2 a-v=8160 c-a=-24889 u=0 d=0 pts=204960 .............vSPEED_UP(video_pts_step=3000 audio_pts_step=1920 pts_diff=10320)................. 28.76 fps k=3 a-v=9690 c-a=-25070 u=1 d=0 pts=297510 .............................. 28.79 fps k=4 a-v=9270 c-a=-25356 u=1 d=0 pts=392010 .............................. 28.75 fps k=5 a-v=8850 c-a=-25493 u=1 d=0 pts=486510 .............................. 28.89 fps k=6 a-v=8430 c-a=-26063 u=1 d=0 pts=581010 .............................. 28.99 fps k=7 a-v=6090 c-a=-25064 u=1 d=0 pts=675510 .............................. 28.94 fps k=8 a-v=5670 c-a=-25788 u=1 d=0 pts=770010 ........................vNORMAL...... 29.19 fps k=9 a-v=4230 c-a=-25402 u=1 d=0 pts=863610 .............................. 28.89 fps k=10 a-v=8310 c-a=-25977 u=1 d=0 pts=953610 ......................vSPEED_UP(video_pts_step=3000 audio_pts_step=1920 pts_diff=10350)........ 28.81 fps k=11 a-v=9270 c-a=-24363 u=2 d=0 pts=1044810 .........disk_usage=13% start rec to rec/archive/2023-12-29_12-31-42.ts ...............caught up...... 28.82 fps k=12 a-v=8850 c-a=-24745 u=2 d=0 pts=1139310 .............................. 29.09 fps k=13 a-v=8430 c-a=-25991 u=2 d=0 pts=1233810 .............................. 28.85 fps k=14 a-v=6090 c-a=-24540 u=2 d=0 pts=1328310 .............................. 28.78 fps k=15 a-v=5670 c-a=-24797 u=2 d=0 pts=1422810 .............................. 29.07 fps k=16 a-v=5250 c-a=-25980 u=2 d=0 pts=1517310

While the command is running it keeps showing this fps data. You said to try the command "touch hooks/start_record" but the process is running and I did not know how to run that, so I opened a new terminal and run in /picam (while the other terminal was running) and nothing happened.

I had to put the modified command for my microphone "plughw:2,0 -c 2" as I read in one of the comments.

So I tried the following steps to see how far I can get. In the part of Usage I did not do the steps "Create symbolic links (optional, but strongly recommended)". I did the steps for "HTTP Live Streaming (HLS)" and it is working but with the 4 seconds lag that is normal for this method. Then I tried to configure the "Using picam in combination with nginx-rtmp-module" I think I configured everything okay but is not running and I read in one of the comments that if the "touch hooks/start_record" is not working this might be an issue so I am back to 0.

PD: sometimes when I try again to run the picam command I get the error: ./state is a broken symbolic link. But this I solve it doing all the steps again from "# Create directories and symbolic links".

Thank you for your patience.

[nahuel915]

[Update]

Sorry I do not know if I can continue with something related in this thread.

But I think I got the "Using picam in combination with nginx-rtmp-module" also running. I think because the video delay is exactly the same as HLS and the audio in both (HLS, rtmp) is impossible to understand is like the audio speed is 0.5x. But the rtmp streaming I cannot see it on the web browser. I copy paste it in VLC (like for HLS). The command I used to run the rtmp is: ./picam --tcpout tcp://127.0.0.1:8181 --alsadev plughw:2,0 -c 2

I am new to this and I like to learn, sorry if I do something wrong.

Thank you again.

[nahuel915]

[update]

I fix the audio speed doing the steps in the link below:

https://github.com/iizukanao/picam/issues/183#issuecomment-1353141207

But I still have the audio and video delay in both methods.

[iizukanao]

Thanks for your feedback. The audio-video delay is a known limitation in the current picam version. I'm planning to introduce a command line option for adjusting this delay in a future update.

As for the recording, touch hooks/start_record worked successfully as indicated by the start rec to rec/archive/2023-12-29_12-31-42.ts message. Use touch hooks/stop_record to finalize the recording file located at rec/archive/2023-12-29_12-31-42.ts

Feel free to reach out if you have more questions or need further assistance.