[FFmpeg-user] OMA playback

Tue Nov 19 23:25:57 EET 2024

Got running Windows XP in VM and app reported error so I abandoned idea to
consume more time on it.

Now that I think about it again I figured out that it might be possible to
reproduce your situation but keeping all files, if possible.
Then I could search for relevant files and bytes that are needed to decrypt
new audio files, in hope something obvious will pop up that could show a
way to recover your files too.

If I get bored again I could try this, but because searching for relevant
files  might not be trivial I may do it later than sooner.

On Tue, Nov 19, 2024 at 6:11 PM Dieter Van Hauwermeiren via ffmpeg-user <
ffmpeg-user at ffmpeg.org> wrote:

>  Hi Paul,
> Were you able to find a way to change the layout of the GEOB binary parts
> of the .OMA files?
> Best,
> Dieter
>     On Wednesday, November 13, 2024 at 07:28:54 PM GMT+1, Dieter Van
> Hauwermeiren via ffmpeg-user <ffmpeg-user at ffmpeg.org> wrote:
>
>   Okay, thank you!Maybe it's worth noting that I extracted the .oma files
> directly from the hard drive of my old Sony NW-HD1. My walkman was dead but
> I wanted to recover the audio files so I demounted the hard drive and was
> able to find an adapter on Amazon to transfer the files directly from the
> hard drive onto my pc. Maybe this is the reason why the GEOB frame is
> different.
> I was able to contact someone who helped develop ffmpeg and he wrote me
> the following:
> - It's using a different GEOB frame ("OMG_ULINF" vs. "OMG_LSI").
> - Only a KEYRING subobject is contained in the binary chunk, no header
> and no EKB.
> - It's using a different root key than the usual one from SonicStage
> (0x00010013 vs. 0x0001001d).
> He also added the following link:
> https://wiki.videolan.org/SoC_2011/OMA/Atrac_Improvements/Hope this helps.
> Best regards,
> Dieter    On Wednesday, November 13, 2024 at 10:22:29 AM GMT+1, Paul B
> Mahol <onemda at gmail.com> wrote:
>
>  Looks like ffmpeg can not process it because files lack some geob binary
> chunk that it expects.
> When inspecting files I found out similar binary chunks that appears to
> contain same data but at different layout.
> I downloaded old SonicStage and will try to find out if its OpenMG binary
> code have any mention of those binary geob chunks and try to see if it can
> be reused somehow to decrypt files.
>
> On Tue, Nov 12, 2024 at 11:29 PM Dieter Van Hauwermeiren via ffmpeg-user <
> ffmpeg-user at ffmpeg.org> wrote:
>
> >  Sorry about that, I changed the privacy settings for the files. It
> should
> > work now.
> >
> https://drive.google.com/file/d/1pQkvSAx5GaCARI7WnHHNW4uDhcHBwSZy/view?usp=drive_linkhttps://drive.google.com/file/d/1-peYBsAhYHCgFgqNCqjkx-Ij1NXvOWI3/view?usp=drive_linkhttps://drive.google.com/file/d/1iJFrFGSjtG7JNGZTpjcJRWW3d21ZrwfL/view?usp=drive_link
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >    On Tuesday, November 12, 2024 at 11:10:30 PM GMT+1, Paul B Mahol <
> > onemda at gmail.com> wrote:
> >
> >  I get Access denied. So needs some permissions change to actually
> download
> > file(s).
> >
> > On Tue, Nov 12, 2024 at 10:40 PM Dieter Van Hauwermeiren via ffmpeg-user
> <
> > ffmpeg-user at ffmpeg.org> wrote:
> >
> > >  Thanks for your response.I've provided the links to three .OMA-files:
> > >
> >
> https://drive.google.com/file/d/1pQkvSAx5GaCARI7WnHHNW4uDhcHBwSZy/view?usp=drive_linkhttps://drive.google.com/file/d/1-peYBsAhYHCgFgqNCqjkx-Ij1NXvOWI3/view?usp=drive_linkhttps://drive.google.com/file/d/1iJFrFGSjtG7JNGZTpjcJRWW3d21ZrwfL/view?usp=drive_link
> > >    On Tuesday, November 12, 2024 at 10:22:38 PM GMT+1, Paul B Mahol <
> > > onemda at gmail.com> wrote:
> > >
> > >  On Tue, Nov 12, 2024 at 8:59 PM Dieter Van Hauwermeiren via
> ffmpeg-user
> > <
> > > ffmpeg-user at ffmpeg.org> wrote:
> > >
> > > > Hi,
> > > > I have a question regarding the playback of .OMA files with
> ffmpeg.The
> > > > .OMA files I would like to play come from a recovered hard disk from
> a
> > > Sony
> > > > NW-HD1 walkman. These files were added to the walkwan using Sony
> > > > Sonicstage. As many users found out the hard way, Sonicstage
> encrypted
> > > and
> > > > DRM protected the audio files by default when transferring them to
> the
> > > > walkwam. On top of that, the audio files couldn't be played back in a
> > > newly
> > > > installed version of Sonicstage because the original installed
> version
> > > was
> > > > associated with a unique encryption key. When I changed computers, I
> > > found
> > > > out that the original encryption key was still on the computer I
> threw
> > > away.
> > > > So because of this, I have a library of .OMA files I cannot play. I
> > have
> > > > read through numerous forums and tried out various proposed solutions
> > but
> > > > so far, none of them has worked. Various solutions include the use of
> > > > ffmpeg, even when the audio files are protected but it doesn't seem
> to
> > > work
> > > > for the files I try to play.Could someone help me with this? I can
> > always
> > > > send a test .OMA file. A big thanks in advance.
> > > > Kind regards,
> > > >
> > >
> > > Feel free to provide link to uploaded .OMA file(s) that are not
> > supported.
> > >
> > >
> > > > Ronnie
> > > > _______________________________________________
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