[FFmpeg-user] 'print:file=foo.txt' fails

Paul B Mahol onemda at gmail.com
Thu Feb 6 13:39:39 EET 2020

On 2/6/20, Mark Filipak <markfilipak.windows+ffmpeg at gmail.com> wrote:
> On 02/06/2020 03:35 AM, Paul B Mahol wrote:
>> On 2/6/20, Mark Filipak <markfilipak.windows+ffmpeg at gmail.com> wrote:
>>> The command line below creates 'foo.txt' but the file is empty (i.e.,
>>> zero length).
>>> Any clues why?
>> Because your file does not have any _frame_ metadata.
> What am I missing here? The file is VTS_02_2.VOB. It contains all the
> metadata that a VOB usually contains.
> It contains one pack per sector. The packs are aggregated into GOPs with
> I-frames and P-frames and B-frames. Each frame has a PES & MPEG2
> sequence header and all the metadata. I can see them with VOBEdit.
> Why can't I list the metadata with ffmpeg?

You are deeply confused. Frame metadata is not what you think it is.
You are looking for packet metadata, while frame metadata is something
completely else.

> Can ffmpeg list metadata?


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