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Summary:ASTERISK-27360: Audio file from ffmpeg pops in AGI (but not dialplan)
Reporter:Naftoli Gugenheim (nafg)Labels:
Date Opened:2017-10-18 19:50:53Date Closed:2020-01-14 11:13:56.000-0600
Priority:MajorRegression?
Status:Closed/CompleteComponents:
Versions:13.13.1 14.3.0 Frequency of
Occurrence		Constant
Related
Issues:
Environment:Reproduced in all of: * Ubuntu 17.04 official package installed directly on laptop * cleardevice/docker-asterisk-latest-pjsip-fail2ban docker image on laptop and on ubuntu 16.04.3 * cleardevice/docker-cert-asterisk13-ubuntu docker image on laptop and on ubuntu 16.04.3Attachments:
Description:1. Using a custom webapp and recorder.js, I record an audio file. A specimen can be accessed here: https://drive.google.com/open?id=0B2SmgnDyV1aEWjBDTzJxRVh3dHM

2. I run ffmpeg -i /tmp/upload7121127648236719621.wav -ac 1 -ar 8000 -y /tmp/test1.wav. The result can be accessed here: https://drive.google.com/open?id=0B2SmgnDyV1aEckJKZWxtRHJ6RUU

3. I run sox /tmp/test1.wav /tmp/test.wav. The result can be accessed here: https://drive.google.com/open?id=0B2SmgnDyV1aEYmNIbkNOaDhwMjA

The Problem:

The file from step 2 plays fine using Playback and Background in the dialplan. However when using the AGI command STREAM FILE, there is a terrible popping sound at the beginning.

Here is what it sounds like listening to test1 repeated: https://drive.google.com/open?id=0B2SmgnDyV1aEZzFLczdQaXNYVTg

Here is what it sounds like listening to test repeated: https://drive.google.com/open?id=0B2SmgnDyV1aEWk9KZFgxNkc5WXc

The testing was done with this AGI script (changing the filename as needed):

{code}
#!/bin/bash


checkresults() {
while read line
do
case ${line:0:4} in
"200 " ) echo $line >&2
        return;;
"510 " ) echo $line >&2
        return;;
"520 " ) echo $line >&2
        return;;
*      ) echo $line >&2;; #keep on reading those Invlid command
#command syntax until "520 End ..."
esac
done
}


declare -a array
while read -e ARG && [ "$ARG" ] ; do
array=(` echo $ARG | sed -e 's/://'`)
export ${array[0]}=${array[1]}
done


# following variables are available from asterisk
echo $agi_request >&2
echo $agi_channel >&2
echo $agi_language >&2
echo $agi_type >&2
echo $agi_uniqueid >&2
echo $agi_callerid >&2
echo $agi_dnid >&2
echo $agi_rdnis >&2
echo $agi_context >&2
echo $agi_extension >&2
echo $agi_priority >&2
echo $agi_enhanced >&2


echo 'ANSWER'

checkresults

while true; do
sleep 1
echo begin >&2
echo 'STREAM FILE /tmp/test ""'
echo end >&2
sleep 1
checkresults
done
{code}
Comments:By: Asterisk Team (asteriskteam) 2017-10-18 19:50:54.484-0500

Thanks for creating a report! The issue has entered the triage process. That means the issue will wait in this status until a Bug Marshal has an opportunity to review the issue. Once the issue has been reviewed you will receive comments regarding the next steps towards resolution.

A good first step is for you to review the [Asterisk Issue Guidelines|https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines] if you haven't already. The guidelines detail what is expected from an Asterisk issue report.

Then, if you are submitting a patch, please review the [Patch Contribution Process|https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process].
By: Joshua C. Colp (jcolp) 2017-10-20 12:13:51.888-0500

Please attach the console output and the dialplan that does not exhibit the problem.
By: Naftoli Gugenheim (nafg) 2017-10-21 20:10:07.269-0500

The dialplan that did not exhibit the problem was essentially:

```
exten => 555,1,Answer
exten => 555,n,While(true)
exten => 555,n,Background(/sounds/test1)
exten => 555,n,EndWhile
exten => 555,n,Hangup
```

What do you mean by the console output?
By: Joshua C. Colp (jcolp) 2017-10-22 06:01:36.809-0500

The Asterisk console output, what is seen from "asterisk -rvvvvvvvvvc".

As well if you add a Wait(1) or Wait(2) to the dialplan logic do you hear a pop? And what are you using to hear the pops on? A SIP phone? ITSP? Analog phone? Analog card?
By: Asterisk Team (asteriskteam) 2017-11-05 12:00:01.023-0600

Suspended due to lack of activity. This issue will be automatically re-opened if the reporter posts a comment. If you are not the reporter and would like this re-opened please create a new issue instead. If the new issue is related to this one a link will be created during the triage process. Further information on issue tracker usage can be found in the Asterisk Issue Guidlines [1].

[1] https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines