Creating OP1A file for Omneon - no audio

[darren....@gmail.com]

Hi 

I am trying to create OP1A IMX50 files for playback in an Omneon. 

Whilst i can get the pictures looking great and working well, the Omneon cannot see the Audio so I get no sound.

The Mediainfo dump on the Audio of what I am creating is:

Audio

ID                                       : 3

Format                                   : PCM

Format settings, Endianness              : Little

Format_Settings_Wrapping                 : Frame (D-10)

Duration                                 : 10mn 35s

Bit rate mode                            : Constant

Bit rate                                 : 12.3 Mbps

Channel(s)                               : 4 channels

Sampling rate                            : 48.0 KHz

Bit depth                                : 24 bits

Stream size                              : 930 MiB (20%)

Delay_SDTI                               : 68000

I have sample target files and the same audio info from them is:

Audio

ID                                       : 3

Format                                   : PCM

Format settings, Endianness              : Little

Format_Settings_Wrapping                 : Frame (BWF)

Duration                                 : 9mn 58s

Bit rate mode                            : Constant

Bit rate                                 : 4 608 Kbps

Channel(s)                               : 4 channels

Sampling rate                            : 48.0 KHz

Bit depth                                : 24 bits

Stream size                              : 329 MiB (8%)

Delay_SystemScheme1                      : 120000

Everything is the same with really the exception of the delay and the type of format_settings_wrapping

Would the differences between the two stop the audio playback? I am guessing that the BWF wrapping shown is causing the problem.

ideally I would rather migrate the client away from BWF anything and into a more widely accepted format.

Has anyone come across this issue before or can steer me to a solution.

thanks

Darren Breeze

[Baptiste Coudurier]

Hi Darren,

-target imx50 has been working all accross the board for quite some time now, it's strange
that omneon would not play it. Did you try using 16 bits ?
If you send me the file that plays, I'll have a look.

--
Baptiste COUDURIER
Key fingerprint 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA
FFmpeg maintainer http://www.ffmpeg.org

[Darren Breeze]

Hi Anil

 

My issue is creating the audio as a 4 channel stream, frame wrapped (bfw).

 

No the client needs to load the file into FCP as well via the Sony plugin.

 

I used the BMX library to re-wrap the op1a-d10 and this made Omneon happy, but FCP still chucked the file out.

 

Darren B.

 

 

From: Anil Tanwade [mailto:anilkuma...@gmail.com]
Sent: 31 January 2013 9:48 PM
To: ffmbc-...@googlegroups.com
Cc: darren....@gmail.com
Subject: Re: Creating OP1A file for Omneon - no audio

 

Hi Darren,

 

Omneon support either AES or BWF audio.

 

I believe you are encoding in SONY XDCAM IMX50 format with D10 audio wrapper. I faced same issue last week.

 

Depending on Omneon video server playout port configuration, with advance configuration, it will support MXF or MOV wrapped IMX50.

 

Omneon also support discrete audio channels. Choice is - 1 channel per track or multi channel per track.

 

FFMBC can do both for you.

 

Thanks and Regards,

Anil Tanwade,

Mumbai, India.

[darren....@gmail.com]

Hi Baptiste

This is a delivery to a client that has a particular use case. The files must play in their Omneon servers and also import into FCP via a Sony plugin. i have to create files that fit into this existing ecosystem.

using -target IMX50 gave me a file audio with the D10 wrapping (1 audio stream, 4 channels). The Omneon played the file OK but could not play back the audio.

I then took that file and re wrapped it with the BBC wrapping tool bmxtranswrap, this gave me the file with 4 mono audio streams with the bfw wrapping. The Omneon could play this fine and recover the audio too.

The FCP import failed (I have no detail of the failure I was told it just didn't load).

The clients sample files are created on an Omneon and have a single audio stream of 4 channels in the bfw wrapping.

I have now used ffmbc without the target and set all the parameters to create an IMX50 file with the -f mxf switch. This creates a file with a single audio stream of 4 channels with aes wrapping. I will take this to the clients site on Monday for testing.

Is there a way to force ffmbc to wrap audio in bfw? I am guessing (Hoping) that the AES wrapped audio will work in both use cases but if it doesn't, it's back to teh drawing board.

Thanks for getting back to me.

regards

Darren B.

[Darren Breeze]

Thanks

 

I will give that cmd line a try first thing tomorrow however, further research seems to suggest that the AES wrapping will be a winner.

 

I have to check up on the various wrappings, I have the "MXF book" at the office so I can have a read tomorrow.

 

Thanks Again.

 

Darren B.

 

 

 

From: Anil Tanwade [mailto:anilkuma...@gmail.com]
Sent: 03 February 2013 8:22 PM
To: ffmbc-...@googlegroups.com
Cc: darren....@gmail.com
Subject: Re: [ffmbc-discuss] Creating OP1A file for Omneon - no audio

 

Hi Darren,

 

Please ignore earlier CMD and use this one.

 

ffmbc -i SOURCE.mxf -vcodec copy -acodec pcm_s16le -timecode 10:00:00:00 OMNEON.mxf -map_audio_channel 0:1:0:0:1:0 -map_audio_channel 0:1:1:0:2:0 -map_audio_channel 0:1:2:0:3:0 -map_audio_channel 0:1:3:0:4:0 -newaudio -newaudio -newaudio

 

Thanks and Regards,

Anil Tanwade.

Mumbai, India.