[FFmpeg-user] does flv support the metadata of rotation as mov ?

Steven Liu lingjiujianke at gmail.com
Fri Jan 6 00:47:42 EET 2017

2017-01-06 4:56 GMT+08:00 Moritz Barsnick <barsnick at gmx.net>:

> On Thu, Jan 05, 2017 at 15:08:09 +0800, qw wrote:
> > I have read the source code of movenc.c, which supports the metadata
> > of rotation. Does flv support 'rotation' like mov?
> From what I read in the FLV specification:
> https://www.adobe.com/content/dam/Adobe/en/devnet/flv/pdfs/
> video_file_format_spec_v10.pdf
> FLV also supports the MVHD and TKHD atoms, like MOV, including the
> TransformMatrix, which seems repsonsible for the rotation. So in
> general, FLV seems to support rotation "tags", and ffmpeg can interpret
> (decode) them. And from what I can tell (at a quick glance), the code
> for generation FLVs in movenc.c also used the MOV rotation code.
> So, probably: Yes. :-)
> Have you tried?

Hi Moritz,

      Do you mean  Andrew can use f4v format? I saw the tag in f4v. :-D

> Moritz
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