<div dir="ltr">Hi Jan,<div><br></div><div>Thanks so much for the quick reply~</div><div><br></div><div>Yes, the video orientation means rotation to handle recording cellphone video's case.</div><div>And could you please provide me with some hint about what to write in the metadata box? I searched a lot but I haven't seen anything about storing rotation information in mp4.</div><div><br></div><div>Thanks so much again~:P</div><div><br></div><div>Best,</div><div>Yisheng</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Mar 28, 2016 at 4:36 PM, Jan Drabner <span dir="ltr"><<a href="mailto:jan@jdrabner.eu" target="_blank">jan@jdrabner.eu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><div><div class="h5">
<br>
Am 3/28/2016 um 10:34 PM schrieb Yisheng Zhao:<br>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">Hi Genius,
<div><br>
</div>
<div>I have a question if video orientation is supported
in3gp/mp4 in FFmpeg/libav?</div>
<div><br>
</div>
<div>In <a href="http://www.etsi.org/deliver/etsi_ts/126200_126299/126244/12.03.00_60/ts_126244v120300p.pdf" target="_blank">http://www.etsi.org/deliver/etsi_ts/126200_126299/126244/12.03.00_60/ts_126244v120300p.pdf</a>,
a "3gvo" box is used to specify the video orientation~</div>
<div><br>
</div>
<div>Thanks so much~</div>
<div><br>
</div>
<div>Best,</div>
<div>Yisheng</div>
</div>
<br>
<fieldset></fieldset>
<br>
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</blockquote>
<br>
Hello,<br>
<br>
if by video orientation you mean video rotation, then yes. I did
that with mp4/HLS and other formats.<br>
It is (usually) done using the "rotate" metadata. Not sure if 3gp
supports that as well.<br>
<br>
Regards,<br>
Jan Drabner<br>
</div>
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