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respeaker / seeed-voicecard

2 Mic Hat, 4 Mic Array, 6-Mic Circular Array Kit, and 4-Mic Linear Array Kit for Raspberry Pi
GNU General Public License v3.0
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[Bug]: seeed-voicecard can't play mp3 #343

Open kanglue opened 3 months ago

kanglue commented 3 months ago

Describe the bug

mplayer -ao alsa:noblock:device=plughw=2,0 xxx.mp3

Expected behavior

mp3 file can be played.

Platform

Raspberry Pi 4b Linux raspberrypi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 aarch64 GNU/Linux

Raspberrypi 4b, Installed card success.

aplay -l 2: seeed2micvoicec [seeed-2mic-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 [bcm2835-i2s-wm8960-hifi wm8960-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0

use mplay can play wav file normally, like this

mplayer -ao alsa:noblock:device=plughw=2,0 /home/ianglei/music/test.wav MPlayer 1.4 (Debian), built with gcc-10 (C) 2000-2019 MPlayer Team do_connect: could not connect to socket connect: No such file or directory Failed to open LIRC support. You will not be able to use your remote control.

Playing /home/ianglei/music/test.wav. libavformat version 58.45.100 (external) Audio only file format detected. Load subtitles in /home/ianglei/music/

Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 16000 Hz, 1 ch, s16le, 256.0 kbit/100.00% (ratio: 32000->32000) Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)

AO: [alsa] 16000Hz 1ch s16le (2 bytes per sample) Video: no video Starting playback… A: 4.5 (04.5) of 5.0 (05.0) 0.1%

Exiting… (End of file)

but play m4a or mp3 failed, I want to know why?

mplayer -ao alsa:noblock:device=plughw=2,0 /home/ianglei/music/horse.mp3 MPlayer 1.4 (Debian), built with gcc-10 (C) 2000-2019 MPlayer Team do_connect: could not connect to socket connect: No such file or directory Failed to open LIRC support. You will not be able to use your remote control.

Playing /home/ianglei/music/horse.mp3. libavformat version 58.45.100 (external) Audio only file format detected. Load subtitles in /home/ianglei/music/

Opening audio decoder: [mpg123] MPEG 1.0/2.0/2.5 layers I, II, III AUDIO: 44100 Hz, 2 ch, s16le, 32.0 kbit/2.27% (ratio: 4000->176400) Selected audio codec: [mpg123] afm: mpg123 (MPEG 1.0/2.0/2.5 layers I, II, III)

[AO_ALSA] alsa-lib: pcm_hw.c:386:(snd_pcm_hw_hw_params) SNDRV_PCM_IOCTL_HW_PARAMS failed (-22): Invalid argument [AO_ALSA] Unable to set hw-parameters: Invalid argument Failed to initialize audio driver ‘alsa:noblock:device=plughw=2’ No such audio driver ‘0’ Could not open/initialize audio device → no sound. Audio: no sound Video: no video

Relevant log output

No response

HinTak commented 3 months ago

It is what it says "SNDRV_PCM_IOCTL_HW_PARAMS" invalid hardware parameters - when you interact with the hardware directly, with "device=plughw=2,0", only a few specific bit rates etc are supported. You need to either re-sample the audio before putting the data through, or use one of the "transcoding" virtual devices created by the driver.

Or you might be missing the alsa transcoding plug in?

Something to do with https://github.com/respeaker/seeed-voicecard/tree/master/ac108_plugin , I think. Anyway, it is rather a generic alsa question - let alsa do the re-sampling for you (choose one of the re-sampling "devices"), or you do the re-sampling yourself.

Have you tried just doing -ao alsa ? It probably will goes to the right place.

Btw, the two-mics device hasn't got any playback ability, so you are just using the pi's own on-board sound chip, which isn't a seeedstudio device!

HinTak commented 3 months ago

A 3rd option: mplayer itself has audio re-sampling functionality, I think under -af or something. Look at "audio filtering" in the mplayer documentation.