The github smart-mirror project uses arecord on pi devices to capture user audio. This is a long running application,

(I expect my mirror to be on 24/7)

Anyhow, after 18 hours, we stop receiving audio data.

I have debugged it to the capture routine in aplay.c

Basically it is not intended to run forever.

rest = count; <---- get the remaining size from the count total size

// don't let the remaining data size be too big

if (rest > fmt_rec_table[file_type].max_filesize)

rest = fmt_rec_table[file_type].max_filesize;

if (max_file_size && (rest > max_file_size))

rest = max_file_size;

write the 'file' header

/* setup sample header */

if (fmt_rec_table[file_type].start)

fmt_rec_table[file_type].start(fd, rest);

/* capture */

fdcount = 0;

while (rest > 0 && recycle_capture_file == 0 && !in_aborting) {

size_t c = (rest <= (off64_t)chunk_bytes) ?

(size_t)rest : chunk_bytes;

size_t f = c * 8 / bits_per_frame;

if (pcm_read(audiobuf, f) != f) {

in_aborting = 1;

break;

}

if (xwrite(fd, audiobuf, c) != c) {

perror(name);

in_aborting = 1;

break;

}

count -= c; <--- decrement the file size

rest -= c; <---- decement the remaining data

fdcount += c;

}

Eventually rest AND count will be 0 or less than 0 (for wav this is 2 gig).

Then we loop back up, start another file, and then while rest >0, it is not any longer

Then we loop, and write a new file header, and then rest <0, so no data capture..

If this is stdout, we should NOT decrement the rest and size counters.. but let the timelimit and sample limit stop the outer loop

while ((file_type == FORMAT_RAW && !timelimit && !sampleslimit) || count > 0);

so my proposed change is

/* capture */

fdcount = 0;

while (rest > 0 && recycle_capture_file == 0 && !in_aborting) {

size_t c = (rest <= (off64_t)chunk_bytes) ?

(size_t)rest : chunk_bytes;

size_t f = c * 8 / bits_per_frame;

if (pcm_read(audiobuf, f) != f) {

in_aborting = 1;

break;

}

if (xwrite(fd, audiobuf, c) != c) {

perror(name);

in_aborting = 1;

break;

}

If(!stdout){ <---- add this test

count -= c; <--- decrement the file size

rest -= c; <---- decement the remaining data

fdcount += c;

}

}

Sam