Good afternoon,

When I tried to run the metadata extraction function I got the following error for the transcoded projects and cannot for the life of me figure out why it occurred. Any thoughts?

2016-05-18T01:59:21.900Z 2209eb39-1c9c-11e6-9555-fb19d12be99e
{
"errorMessage": "Command failed: /bin/sh -c bin/ffprobe -v quiet -print_format json -show_format \"/tmp/video1.mp4-1080p.mp4\"\n/bin/sh: bin/ffprobe: Permission denied\n",
"errorType": "Error",
"stackTrace": [
"/bin/sh: bin/ffprobe: Permission denied",
"",
"ChildProcess.exithandler (child_process.js:213:12)",
"emitTwo (events.js:87:13)",
"ChildProcess.emit (events.js:172:7)",
"maybeClose (internal/child_process.js:821:16)",
"Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)"
]
}

Thank you,
Arlen Duncan III

Hi Arlen, thank you for your question! Are you using Linux/Mac or Windows?

If you are on Linux/MacOX could you run chmod 775 on ffprobe and then re-upload the function again?

chmod 775 ffprobe

If you are using Windows modify cmd in the extractMetadata function. Change cmd to be the following:

var cmd = 'chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format "/tmp/' + localFilename + '"';

Please let me know if it works for you and if you are still getting errors.

Hi,

I am running it from a Windows box. I made the change in extraction function and the function proceeded to error out with the following so that tells me that I need to modify the IAM policy in regards to S3 for the lambda-excute role. I am going to figure this out as this seems like a good project to get my feet in the world of serverless architecture.

 Filter: chmod
 Date/Time: 2016/06/01 01:34:57  
			
Creation Time
Event Data
Ingestion Time
2016-06-01 01:34:59 UTC
2016-06-01T01:34:59.358Z	0b417eab-2799-11e6-9017-dbe7ce5ec688	chmod: changing permissions of 'bin/ffprobe': Operation not permitted  
2016-06-01 01:35:12 UTC
2016-06-01 01:34:59 UTC
2016-06-01T01:34:59.361Z	0b417eab-2799-11e6-9017-dbe7ce5ec688
{
    "errorMessage": "Command failed: /bin/sh -c chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format \"/tmp/video2.mp4-720p.mp4\"\nchmod: changing permissions of 'bin/ffprobe': Operation not permitted\n",
    "errorType": "Error",
    "stackTrace": [
        "chmod: changing permissions of 'bin/ffprobe': Operation not permitted",
        "",
        "ChildProcess.exithandler (child_process.js:213:12)",
        "emitTwo (events.js:87:13)",
        "ChildProcess.emit (events.js:172:7)",
        "maybeClose (internal/child_process.js:821:16)",
        "Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)"
    ]
}
2016-06-01 01:35:12 UTC
2016-06-01 01:35:56 UTC
2016-06-01T01:35:56.358Z	0b417eab-2799-11e6-9017-dbe7ce5ec688	chmod: changing permissions of 'bin/ffprobe': Operation not permitted  
2016-06-01 01:36:10 UTC
2016-06-01 01:35:56 UTC
2016-06-01T01:35:56.358Z	0b417eab-2799-11e6-9017-dbe7ce5ec688
{
    "errorMessage": "Command failed: /bin/sh -c chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format \"/tmp/video2.mp4-720p.mp4\"\nchmod: changing permissions of 'bin/ffprobe': Operation not permitted\n",
    "errorType": "Error",
    "stackTrace": [
        "chmod: changing permissions of 'bin/ffprobe': Operation not permitted",
        "",
        "ChildProcess.exithandler (child_process.js:213:12)",
        "emitTwo (events.js:87:13)",
        "ChildProcess.emit (events.js:172:7)",
        "maybeClose (internal/child_process.js:821:16)",
        "Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)"
    ]
}
2016-06-01 01:36:10 UTC
2016-06-01 01:36:00 UTC
2016-06-01T01:36:00.018Z	0b409539-2799-11e6-bb2e-3f3e0feddc73	chmod: changing permissions of 'bin/ffprobe': Operation not permitted  
2016-06-01 01:36:10 UTC
2016-06-01 01:36:00 UTC
2016-06-01T01:36:00.018Z	0b409539-2799-11e6-bb2e-3f3e0feddc73
{
    "errorMessage": "Command failed: /bin/sh -c chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format \"/tmp/video2.mp4-web-720p.mp4\"\nchmod: changing permissions of 'bin/ffprobe': Operation not permitted\n",
    "errorType": "Error",
    "stackTrace": [
        "chmod: changing permissions of 'bin/ffprobe': Operation not permitted",
        "",
        "ChildProcess.exithandler (child_process.js:213:12)",
        "emitTwo (events.js:87:13)",
        "ChildProcess.emit (events.js:172:7)",
        "maybeClose (internal/child_process.js:821:16)",
        "Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)"
    ]
}
2016-06-01 01:36:10 UTC
2016-06-01 01:36:01 UTC
2016-06-01T01:36:01.038Z	0b3a52cd-2799-11e6-b0eb-333966a6aa46	chmod: changing permissions of 'bin/ffprobe': Operation not permitted  
2016-06-01 01:36:10 UTC
2016-06-01 01:36:01 UTC
2016-06-01T01:36:01.039Z	0b3a52cd-2799-11e6-b0eb-333966a6aa46
{
    "errorMessage": "Command failed: /bin/sh -c chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format \"/tmp/video2.mp4-1080p.mp4\"\nchmod: changing permissions of 'bin/ffprobe': Operation not permitted\n",
    "errorType": "Error",
    "stackTrace": [
        "chmod: changing permissions of 'bin/ffprobe': Operation not permitted",
        "",
        "ChildProcess.exithandler (child_process.js:213:12)",
        "emitTwo (events.js:87:13)",
        "ChildProcess.emit (events.js:172:7)",
        "maybeClose (internal/child_process.js:821:16)",
        "Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)"
    ]
}
2016-06-01 01:36:10 UTC
2016-06-01 01:37:56 UTC
2016-06-01T01:37:56.758Z	0b409539-2799-11e6-bb2e-3f3e0feddc73	chmod: changing permissions of 'bin/ffprobe': Operation not permitted  
2016-06-01 01:38:11 UTC
2016-06-01 01:37:56 UTC
2016-06-01T01:37:56.758Z	0b409539-2799-11e6-bb2e-3f3e0feddc73
{
    "errorMessage": "Command failed: /bin/sh -c chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format \"/tmp/video2.mp4-web-720p.mp4\"\nchmod: changing permissions of 'bin/ffprobe': Operation not permitted\n",
    "errorType": "Error",
    "stackTrace": [
        "chmod: changing permissions of 'bin/ffprobe': Operation not permitted",
        "",
        "ChildProcess.exithandler (child_process.js:213:12)",
        "emitTwo (events.js:87:13)",
        "ChildProcess.emit (events.js:172:7)",
        "maybeClose (internal/child_process.js:821:16)",
        "Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)"
    ]
}
2016-06-01 01:38:11 UTC
2016-06-01 01:38:09 UTC
2016-06-01T01:38:09.978Z	0b417eab-2799-11e6-9017-dbe7ce5ec688	chmod: changing permissions of 'bin/ffprobe': Operation not permitted  
2016-06-01 01:38:11 UTC
2016-06-01 01:38:09 UTC
2016-06-01T01:38:09.978Z	0b417eab-2799-11e6-9017-dbe7ce5ec688
{
    "errorMessage": "Command failed: /bin/sh -c chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format \"/tmp/video2.mp4-720p.mp4\"\nchmod: changing permissions of 'bin/ffprobe': Operation not permitted\n",
    "errorType": "Error",
    "stackTrace": [
        "chmod: changing permissions of 'bin/ffprobe': Operation not permitted",
        "",
        "ChildProcess.exithandler (child_process.js:213:12)",
        "emitTwo (events.js:87:13)",
        "ChildProcess.emit (events.js:172:7)",
        "maybeClose (internal/child_process.js:821:16)",
        "Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)"
    ]
}
2016-06-01 01:38:11 UTC
2016-06-01 01:38:14 UTC
2016-06-01T01:38:14.818Z	0b3a52cd-2799-11e6-b0eb-333966a6aa46	chmod: changing permissions of 'bin/ffprobe': Operation not permitted  
2016-06-01 01:38:29 UTC
2016-06-01 01:38:14 UTC
2016-06-01T01:38:14.820Z	0b3a52cd-2799-11e6-b0eb-333966a6aa46
{
    "errorMessage": "Command failed: /bin/sh -c chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format \"/tmp/video2.mp4-1080p.mp4\"\nchmod: changing permissions of 'bin/ffprobe': Operation not permitted\n",
    "errorType": "Error",
    "stackTrace": [
        "chmod: changing permissions of 'bin/ffprobe': Operation not permitted",
        "",
        "ChildProcess.exithandler (child_process.js:213:12)",
        "emitTwo (events.js:87:13)",
        "ChildProcess.emit (events.js:172:7)",
        "maybeClose (internal/child_process.js:821:16)",
        "Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)"
    ]
}
2016-06-01 01:38:29 UTC

The policy I created to attach to the lambda-s3-execution-role. I am fairly certain when I test this later it will not help with the chmod error.
Summary

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetObject",
                "s3:PutObject"
            ],
            "Resource": "arn:aws:lambda:us-east-1:236314643822:function:extract-metadata"
        }
    ]
}

Thank you,
Arlen

Peter Sbarski wrote:Hi Arlen, thank you for your question! Are you using Linux/Mac or Windows?

If you are on Linux/MacOX could you run chmod 775 on ffprobe and then re-upload the function again?

chmod 775 ffprobe

If you are using Windows modify cmd in the extractMetadata function. Change cmd to be the following:

var cmd = 'chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format "/tmp/' + localFilename + '"';

Please let me know if it works for you and if you are still getting errors.

I like the effort of chmod inside lambda, but that doesnt work, only /tmp is writable in lambda. perhaps the ffprobe could be moved there and chmod would then work. I got it to work by setting up an ec2 instance to create the zip file on and upload from.
A missing step is to add permissions needed to be added to the lambda function to read from and write to the transcoded directory

i tested it and changing the lambda function command to this works from windows
var cmd = 'cp bin/ffprobe /tmp/ && chmod 775 /tmp/ffprobe && /tmp/ffprobe -v quiet -print_format json -show_format "/tmp/' + localFilename + '"';

472618 wrote:

Peter Sbarski wrote:Hi Arlen, thank you for your question! Are you using Linux/Mac or Windows?

If you are on Linux/MacOX could you run chmod 775 on ffprobe and then re-upload the function again?

chmod 775 ffprobe

If you are using Windows modify cmd in the extractMetadata function. Change cmd to be the following:

var cmd = 'chmod 775 bin/ffprobe && bin/ffprobe -v quiet -print_format json -show_format "/tmp/' + localFilename + '"';

Please let me know if it works for you and if you are still getting errors.