[FFmpeg-user] Is it possible to write a DOLBY-E metadata flag to specific PCM Audio Streams in a MXF File?

[Carles Vila]

Sorry, I can only help you by saying that I've delivered a fair amount of
mxf files (d-10, imx, XDCAM...) with embedded DolbyE and I've never been
asked to provide this metadata info.
Of course I encode according to broadcaster specs, Dolby E is always on
CH5-6 and 7-8, so I assume they know what they're doing, for example not
playing back dolby E as regular PCM.

Have you been specifically asked to provide this metadata or is it just for
"courtesy"?



On 5 July 2016 at 10:17, Christoph Gerstbauer <christophgerstbauer at gmail.com
> wrote:

> Hi
>
> I am trying this a second time, because nobody answered to my mail in June.
>
> I am using FFmpeg for generating a D-10 file with 8ch audio (16bit).
> Typicall the Audio is always PCM but sometimes some dualchannels are is
> a Dolby-E pair.
>
> Is it possible to overwrite a metadata flag for PCM Audio channels to give
> the
> decoder (which opens the MXF) the information that it should decode
> Dolby E and not PCM on e.g Ch5 and Ch6?
>
> Example D10 file with Dolby E is
>
> 1 stream video (0:0)
> 1 stream audio with 8ch (0:1):
> ch1 PCM
> ch2 PCM
> ch3 PCM
> ch4 PCM
> ch5 Dolby E (encoded as PCM), needs  a "Dolby E"-flag
> ch6 Dolby E (encoded as PCM), needs  a "Dolby E"-flag
> ch7 PCM
> ch8 PCM
>
> -----
>
> In mediainfo this would look approx. like following:
>
>
> Audio #1
> ID                                       : 3
> Format                                   : PCM
> Format settings, Endianness              : Little
> Format settings, wrapping mode           : Frame (AES)
> Codec ID                                 : 0D01030102060300
> Duration                                 : 59s 640ms
> Bit rate mode                            : Constant
> Bit rate                                 : 1 152 Kbps
> Channel(s)                               : 1 channel
> Sampling rate                            : 48.0 KHz
> Frame rate                               : 25.000 fps (1920 spf)
> Bit depth                                : 24 bits
> Stream size                              : 8.19 MiB (2%)
>
> Audio #2
> ID                                       : 4
> Format                                   : PCM
> Format settings, Endianness              : Little
> Format settings, wrapping mode           : Frame (AES)
> Codec ID                                 : 0D01030102060300
> Duration                                 : 59s 640ms
> Bit rate mode                            : Constant
> Bit rate                                 : 1 152 Kbps
> Channel(s)                               : 1 channel
> Sampling rate                            : 48.0 KHz
> Frame rate                               : 25.000 fps (1920 spf)
> Bit depth                                : 24 bits
> Stream size                              : 8.19 MiB (2%)
>
> Audio #3
> ID                                       : 5 / 6-1
> Format                                   : Dolby E
> Mode                                     : 24
> Format settings, Endianness              : Little
> Format settings, wrapping mode           : Frame (AES)
> Muxing mode                              : SMPTE ST 337
> Codec ID                                 : 0D01030102060300
> Duration                                 : 59s 640ms
> Bit rate mode                            : Constant
> Encoded bit rate                         : 2 304 Kbps
> Channel(s)                               : 6 channels
> Channel positions                        : Front: L C R, Side: L R, LFE
> Sampling rate                            : 48.0 KHz
> Frame rate                               : 25.000 fps (1920 spf)
> Bit depth                                : 20 bits
> Delay relative to video                  : 10h 0mn
> Encoded stream size                      : 16.4 MiB (4%)
>
> Audio #4
> ID                                       : 5 / 6-2
> Format                                   : Dolby E
> Mode                                     : 24
> Format settings, Endianness              : Little
> Format settings, wrapping mode           : Frame (AES)
> Muxing mode                              : SMPTE ST 337
> Codec ID                                 : 0D01030102060300
> Duration                                 : 59s 640ms
> Bit rate mode                            : Constant
> Encoded bit rate                         : 0 bps
> Channel(s)                               : 2 channels
> Channel positions                        : Front: L R
> Sampling rate                            : 48.0 KHz
> Frame rate                               : 25.000 fps (1920 spf)
> Bit depth                                : 20 bits
> Delay relative to video                  : 10h 0mn
> Encoded stream size                      : 0.00 Byte (0%)
>
> Audio #5
> ID                                       : 7
> Format                                   : PCM
> Format settings, Endianness              : Little
> Format settings, wrapping mode           : Frame (AES)
> Codec ID                                 : 0D01030102060300
> Duration                                 : 59s 640ms
> Bit rate mode                            : Constant
> Bit rate                                 : 1 152 Kbps
> Channel(s)                               : 1 channel
> Sampling rate                            : 48.0 KHz
> Frame rate                               : 25.000 fps (1920 spf)
> Bit depth                                : 24 bits
> Stream size                              : 8.19 MiB (2%)
>
> Audio #6
> ID                                       : 8
> Format                                   : PCM
> Format settings, Endianness              : Little
> Format settings, wrapping mode           : Frame (AES)
> Codec ID                                 : 0D01030102060300
> Duration                                 : 59s 640ms
> Bit rate mode                            : Constant
> Bit rate                                 : 1 152 Kbps
> Channel(s)                               : 1 channel
> Sampling rate                            : 48.0 KHz
> Frame rate                               : 25.000 fps (1920 spf)
> Bit depth                                : 24 bits
> Stream size                              : 8.19 MiB (2%)
>
> ----
>
>
> Any hints and tipps are welcome :)
>
> Best Regards
> Chris
>
>
>
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".