Alsa - Invalid Argument

[paolohu]

I've been using picam quite awhile with a USB microphone. I've been playing around with the audioinjector sound card (http://www.audioinjector.net/#!/rpi-hat).

The card seems to work find with arecord and aplay - and with ffmpeg using raspivid | ffmpeg.

When I try and start picam using it I get the following error:

Set video_encode state to executing opening ALSA device for capture: hw:0,0 cannot use mono audio; trying stereo final audio_channels: 2 sample_rate: 48000 nb_samples: 1024 sample_fmt: 1 audio_codec_ctx->channel_layout: 3 av_frame->channel_layout: 3 audio_codec_ctx->channels: 2 av_frame->channels: 0 allocated 4096 bytes for audio samples audio_pts_step_base: 1920 error: cannot set access type (Invalid argument)

If I go back to the usb mic then it's fine - so I'm assuming it has something to to with the card - anything I can try to troubleshoot further?

[paolohu]

more information - if i set the alsadev to: plughw:CARD=audioinjectorpi,DEV=0

it will startup (ie, not crash) but there's no actual audio and the video freezes. For a comparison here's the log of the startup with the usb microphone and one with the audio card...

usb mic:

allocated 2048 bytes for audio samples audio_pts_step_base: 1920 actual sample rate=48000 dir=0 microphone: buffer size: 204800 frames (channels=1 buffer_size=2048 multiply=100) microphone: setting period size to 1024 actual_period_size=1024 dir=0 audio capture device: Plug PCM: Hardware PCM card 1 'USB Audio Device' device 0 subdevice 0 Its setup is: stream : CAPTURE access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 204800 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 1 stop_threshold : 204800 silence_threshold: 0 silence_size : 0 boundary : 1677721600 appl_ptr : 0 hw_ptr : 0 start capturing video waiting for the first video buffer start capturing audio [microphone started]capturing started

audio injector card:

opening ALSA device for capture: plughw:CARD=audioinjectorpi,DEV=0 final audio_channels: 1 sample_rate: 48000 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: 1920 actual sample rate=48000 dir=0 failed to set buffer size for microphone: buffer_size=2048 multiply=100 trying smaller buffer size for microphone: buffer_size=2048 multiply=50 microphone: buffer size: 102400 frames (channels=1 buffer_size=2048 multiply=50) microphone: setting period size to 1024 actual_period_size=1024 dir=0 audio capture device: Plug PCM: Route conversion PCM (sformat=S16_LE) Transformation table: 0 <- 00.5 + 10.5 Its setup is: stream : CAPTURE access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 102400 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 1 stop_threshold : 102400 silence_threshold: 0 silence_size : 0 boundary : 1677721600 Slave: Mmap emulation PCM 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 : 102400 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 1 stop_threshold : 102400 silence_threshold: 0 silence_size : 0 boundary : 1677721600 Slave: Hardware PCM card 0 'audioinjector-pi-soundcard' device 0 subdevice 0 Its setup is: stream : CAPTURE access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 102400 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 1677721600 stop_threshold : 102400 silence_threshold: 0 silence_size : 0 boundary : 1677721600 appl_ptr : 0 hw_ptr : 0 start capturing video waiting for the first video buffer start capturing audio [microphone started]not first audionot first

[iizukanao]

@paolohu Looks like Audio Injector does not support mmap access. Can you set mmap_emulation to true in your ALSA config file?

[paolohu]

i'm working through this one - right now i'm just getting:

Unknown field mmap_emulation

when I true and set that value in the config file. I'll try a few more things and let you know.

[paolohu]

So I couldn't figure out a way to make mmap_emulation work - but I did find a way to make the Audio Injector card support mmap.

In case it helps anyone in the future that uses that card (http://www.audioinjector.net) the fix is pretty simple:

Edit the /boot/config.txt file on the Raspberry Pi and include:

dtoverlay=i2s-mmap

once I did that everything started working properly with the picam app.

[czarina]

I have this same issue. I'm using an i2s MEMS mic. I get:

'error: cannot set access type (Invalid argument)'

When I do sudo ./picam --alsadev mic_mono

I have already added dtoverlay=i2s-mmap to /boot/config.txt but this did not help.

[czarina]

Here is my verbose output. This looks like an mmap issue. I've set mmap_emulation true in my ALSA config files, but this gives an error that mmap_emulation is not recognized:

$ sudo ./picam --alsadev mic_mono --verbose video_width=1280 video_height=720 video_fps=30.000000 fr_q16=1966080 video_pts_step=3000 video_gop_size=30 video_rotation=0 video_hflip=0 video_vflip=0 video_bitrate=2000000 video_avc_profile=constrained_baseline video_avc_level=3.1 video_qp_min=-1 video_qp_max=-1 video_qp_initial=-1 video_slice_dquant=-1 alsa_dev=mic_mono audio_channels=1 audio_sample_rate=48000 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: mic_mono ALSA lib pcm_multi.c:1223:(_snd_pcm_multi_open) Unknown field mmap_emulation error: cannot open audio capture device 'mic_mono': Invalid argument hint: specify correct ALSA device with '--alsadev ' warning: audio capturing is disabled sample_rate: 48000 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: 1920 start capturing video waiting for the first video buffer capturing started .[NAL7][NAL8]............................... 31.10 fps k=1 a-v=1080 c-a=-518 u=0 d=0 pts=93000 .............................. 29.96 fps k=2 a-v=1320 c-a=-413 u=0 d=0 pts=183000 .............................. 30.10 fps k=3 a-v=1560 c-a=-690 u=0 d=0 pts=273000 .............................. 30.17 fps k=4 a-v=1800 c-a=-1242 u=0 d=0 pts=363000 .............................. 29.85 fps k=5 a-v=2040 c-a=-750 u=0 d=0 pts=453000 .............................. 30.08 fps k=6 a-v=2280 c-a=-941 u=0 d=0 pts=543000 .............................. 30.13 fps k=7 a-v=2520 c-a=-1207 u=0 d=0 pts=633000 .............................. 30.09 fps k=8 a-v=2760 c-a=-1408 u=0 d=0 pts=723000 ......^Cstop requested (signal=2) shutdown sequence start waiting for the camera to finish .Reverting pBuffer to its original value 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 stop requested (signal=15) pthread_join hooks_thread free keyframe_pointers shutdown successful