Recording video+audio LAG

[mitsus]

Hi all, I try to record Video+Audio using my RaspiCam with i2S mic. All work fine, but during playback of recorderd video isee somethings some LAG...so I see the video that stop play for 1 sec in various point of it. I use these basic paramenters for start picam: picam -w 1920 -h 1080 --alsadev plug:dmic_sv -r 44100

I use rec directories in RAM (/run/shm). How can I solve these lags.

Thanks and best regards

[iizukanao]

@mitsus Can you use plughw: instead of plug:? Also, can you provide full console output of picam with --verbose option?

[mitsus]

Hi @iizukanao below the output with --verbose:

/home/chitchat/picam/picam -w 1920 -h 1080 -f 25 --alsadev plughw:dmic_sv -r 44100 --verbose using AVC High Profile Level 4 warn: fps > 20 might not work properly when width and height is large. Use lower --fps or use --vfr. If you still want to use this configuration, see if picam keeps up with 25.0 fps using --verbose. video_width=1920 video_height=1080 video_fps=25.000000 fr_q16=1638400 video_pts_step=3600 video_gop_size=25 video_rotation=0 video_hflip=0 video_vflip=0 video_bitrate=2000000 video_avc_profile=high video_avc_level=4 video_qp_min=-1 video_qp_max=-1 video_qp_initial=-1 video_slice_dquant=-1 alsa_dev=plughw:dmic_sv audio_channels=1 audio_sample_rate=44100 audio_bitrate=40000 audio_volume_multiply=1.000000 is_hlsout_enabled=0 is_hls_encryption_enabled=0 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_opacity=255 blank_background_color=0x0 is_audio_preview_enabled=0 audio_preview_dev=plughw:0,0 record_buffer_keyframes=5 state_dir=state hooks_dir=hooks configuring devices exposure control: auto setting exposure: eMetering: 0 xEVCompensation: 0 nApertureFNumber: 0 bAutoAperture: 0 nShutterSpeedMsec: 0 bAutoShutterSpeed: 1 nSensitivity: 0 bAutoSensitivity: 1 Set video_encode state to idle Enable port buffers for camera 71 Enable port buffers for video_encode 200 Enable port buffers for video_encode 201 Set camera state to executing Set video_encode state to executing opening ALSA device for capture: plughw:dmic_sv ALSA lib pcm_hw.c:1713:(_snd_pcm_hw_open) Invalid value for card error: cannot open audio capture device 'plughw:dmic_sv': No such device hint: specify correct ALSA device with '--alsadev <dev>' warning: audio capturing is disabled sample_rate: 44100 nb_samples: 1024 sample_fmt: 1 audio_codec_ctx->channel_layout: 4 av_frame->channel_layout: 4 audio_codec_ctx->channels: 1 av_frame->channels: 0 allocated 2048 bytes for audio samples audio_pts_step_base: 2089 start capturing video waiting for the first video buffer capturing started .[NAL7].......................... 25.63 fps k=1 a-v=4583 c-a=-1771 u=0 d=0 pts=93600 ..........^Cstop requested (signal=2) Reverting pBuffer to its original value shutdown sequence start stop capturing video shutdown_openmax: ilclient_flush_tunnels shutdown_openmax: disable port buffer for camera 71 shutdown_openmax: disable port buffer for video_encode 200 shutdown_openmax: disable port buffer for video_encode 201 shutdown_openmax: disable tunnel[0] shutdown_openmax: teardown tunnels shutdown_openmax: state transition to idle shutdown_openmax: state transition to loaded shutdown_openmax: ilclient_cleanup_components shutdown_openmax: OMX_Deinit shutdown_openmax: ilclient_destroy cam_client shutdown_openmax: ilclient_destroy ilclient shutdown_video teardown_audio_encode hls_destroy pthread_mutex_destroy teardown_socks free_encoded_packets stop_watching_hooks pthread_join hooks_thread stop requested (signal=15) free keyframe_pointers shutdown successful

it has this error:

opening ALSA device for capture: plughw:dmic_sv ALSA lib pcm_hw.c:1713:(_snd_pcm_hw_open) Invalid value for card error: cannot open audio capture device 'plughw:dmic_sv': No such device hint: specify correct ALSA device with '--alsadev <dev>' warning: audio capturing is disabled

[mitsus]

With this options: /home/chitchat/picam/picam -w 1920 -h 1080 -f 30 --alsadev plug:dmic_sv -r 44100

all work fine, but video quality is not the best. If i run raspivid with same paramenters it was best of picam. So How can I have the best quality video with this resolution (or lower resolution)? My purpose is to have best quality video possible.

Thanks a lot