blocks|key|428174|text|根据您使用的ffmpeg版本和编译方式，可以使用以下方法之一...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|428175|ffmpeg+-vf+"transpose=1"+-i+input.mov+output.mp4|code-block|syntax|javascript|428176|...or...|428177|ffmpeg+-vfilters+"rotate=90"+-i+input.mov+output.mp4|428178|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Depending on which version of ffmpeg you have and how it's compiled, one of the following should work...
<pre><code>ffmpeg -vf &quot;transpose=1&quot; -i input.mov output.mp4
</code></pre>
...or...
<pre><code>ffmpeg -vfilters &quot;rotate=90&quot; -i input.mov output.mp4
</code></pre>

blocks|key|642697|text|FFMPEG更改了默认行为，使用旋转元数据in+2015自动旋转视频源。这是作为v2.7发布的。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|642698|如果您的ffmpeg版本是v2.7或更高版本，但您的旋转元数据不受尊重，则问题可能是您使用的是基于元数据的自定义旋转。这将导致相同的逻辑被应用两次，改变或取消旋转。|642699|除了删除自定义旋转(推荐)外，还可以使用-noautorotate关闭自动旋转。|style|CODE|642700|ffmpeg+-noautorotate+-i+input.mp4...|642701|这在一些旧版本中也是有效的。|642702|entityMap|0|LINK|mutability|MUTABLE|url|https://trac.ffmpeg.org/ticket/515#comment:12^0|L|7|0|0|0|K|D|0|0|X|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|6|7|Z|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|10|8|@$A|11|B|12|H|I]]|9|@]|C|$]]|$1|J|3|K|5|6|7|13|8|@$A|14|B|15|H|I]]|9|@]|C|$]]|$1|L|3|M|5|6|7|16|8|@]|9|@]|C|$]]|$1|N|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|O|$P|$5|Q|R|S|C|$T|U]]]]

FFMPEG changed the default behavior to auto rotate video sources with rotation metadata <a href="https://trac.ffmpeg.org/ticket/515#comment:12" rel="noreferrer">in 2015</a>. This was released as v2.7.

If your ffmpeg version is v2.7 or newer, but your rotation metadata isn't respected, the problem is likely that you are using custom rotation based on metadata. This will cause the same logic to be applied twice, changing or cancelling out the rotation.

In addition to removing your custom rotation (recommended), there's an option to turn off auto rotation with <code>-noautorotate</code>.

<code>ffmpeg -noautorotate -i input.mp4</code>...

This will also work in some older releases.

blocks|key|428206|text|为了完整起见，发生这种情况的原因是iPhones实际上只捕获了一个固定方向的视频。然后，测量到的方向被记录在苹果特定的元数据中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|428207|其效果是，Quicktime播放器在回放期间读取元数据并将视频旋转到正确的方向，但其他软件(例如，VLC)不这样做，并将其显示为在实际编解码器数据中定向。|428208|这就是为什么rotate=90+(或vflip，或transpose等)对某些人有效，但对其他人无效。根据相机在录制过程中的手持方式，所需的旋转可能是90度、180度，甚至270度。在不读取元数据的情况下，您只是在猜测需要多少旋转，修复一个视频的更改对另一个视频将失败。|offset|length|style|CODE|428209|entityMap^0|0|0|6|9|I|5|P|9|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@$F|O|G|P|H|I]|$F|Q|G|R|H|I]|$F|S|G|T|H|I]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|K|$]]

For sake of completeness, the reason this is happening is that iPhones only actually capture video in one fixed orientation. The measured orientation is then recorded in Apple-specific metadata.

The effect is that Quicktime Player reads the metadata and rotates the video to the correct orientation during playback, but other software (e.g., VLC) does not and shows it as oriented in the actual codec data.

This is why <code>rotate=90</code> (or <code>vflip</code>, or <code>transpose</code>, or etc.) will work for some people, but not others. Depending on how the camera is held during recording, the rotation necessary could be 90, 180, or even 270 degrees. Without reading the metadata, you're just guessing at how much rotation is necessary and the change that fixes one video will fail for another.

blocks|key|642734|text|为了在网页中包含我来自iPhone的肖像格式的视频，我刚刚发现了下面的.mp4文件在肖像显示中的秘诀。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|642735|步骤1:在QuickTime播放器中，将文件导出为480p+(我假设720p或1080p也可以)。您将再次获得一个.mov文件。|642736|步骤2:在QT+Player中获取新文件，并导出到“iPad，iPhone…”。您将获得一个.m4v文件。|642737|步骤3:我正在使用Miro+Video+Converter，但可能任何现成的转换器都可以工作，以获得您的.mp4文件。|642738|就像一个(长篇大论的)咒语。|642739|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

For including into web pages my portrait-format videos from iPhone, I just discovered the following recipe for getting .mp4 files in portrait display.

Step 1: In QuickTime Player, Export your file to 480p (I assume that 720p or 1080p would work as well). You get a .mov file again.

Step 2: Take the new file in QT Player, and export to “iPad, iPhone…”. You get a .m4v file.

Step 3: I’m using Miro Video Converter, but probably any readily-available converter at all will work, to get your .mp4 file.

Works like a (long-winded) charm.

blocks|key|642804|text|我用Ipad3拍摄了这段视频，它是颠倒的，我想这是所有苹果设备在某些版本中的常见情况。此外，3分钟长的MOV文件(1920x1090)大小约为500Mb，这使得它不容易共享。我不得不将它转换成MP4，并分析了我在stackoverflow上找到的所有线程，这是我使用的ffmpeg的最终代码字符串。2.8.4)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|642805|ffmpeg+-i+IN.MOV+-s+960x540+-metadata:s:v+rotate="0"+-acodec+libmp3lame+OUT.mp4|code-block|syntax|javascript|642806|如果你不需要改变大小和音频编解码器，我想你可以只留下'-metadata:s:v+rotate="0"‘。请注意，如果您调整视频的大小，宽度和高度应该完全除以4。|642807|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I've filmed the video with Ipad3 and it was oriented upside down, which I suppose is the common situation of all Apple devices at some versions. Besides of it, the 3-minutes long MOV file (1920x1090) took about 500 Mb in size, which made it not available to share easily. I had to convert it to MP4, and analyzing all threads I've found on stackoverflow, here's the final code string for ffmpeg I've used (ffmpeg ver. 2.8.4):

<pre><code>ffmpeg -i IN.MOV -s 960x540 -metadata:s:v rotate="0" -acodec libmp3lame OUT.mp4
</code></pre>

I suppose you may just leave '-metadata:s:v rotate="0"' if you don't need the resize and audio codec change. Note that if you resize the video, width and height should fully divide to 4.

blocks|key|642864|text|虽然这个话题很老了。希望这能对某些人有所帮助：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|642865|获取ffmpeg最新版本：https://www.ffmpeg.org/download.html|offset|length|642866|对我有效的命令(翻转180度)：|642867|ffmpeg+-noautorotate+-i+input.mp4+-filter:v+"rotate=PI"+output.mp4|code-block|syntax|javascript|642868|当度数由-filter:v+"PI/180*degrees"确定时|style|CODE|642869|例如，45度的-filter:v+"45*PI/180"|642870|这里有一个很好的解释，https://superuser.com/questions/578321/how-to-rotate-a-video-180-with-ffmpeg|642871|entityMap|0|LINK|mutability|MUTABLE|url|https://www.ffmpeg.org/download.html|1|https://superuser.com/questions/578321/how-to-rotate-a-video-180-with-ffmpeg^0|0|D|10|0|0|0|0|4|Q|0|7|L|0|B|24|1|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@$D|16|E|17|1|18]]|A|$]]|$1|F|3|G|5|6|7|19|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|1A|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1B|8|@$D|1C|E|1D|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1E|8|@$D|1F|E|1G|O|P]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1H|8|@]|9|@$D|1I|E|1J|1|1K]]|A|$]]|$1|U|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]|12|$5|X|Y|Z|A|$10|13]]]]

Although the topic is old.
Hope this will help some one:

Get ffmpeg latest version : <a href="https://www.ffmpeg.org/download.html" rel="nofollow noreferrer">https://www.ffmpeg.org/download.html</a>

The command that worked for me (to flip 180 degrees):

<pre><code>ffmpeg -noautorotate -i input.mp4 -filter:v "rotate=PI" output.mp4
</code></pre>

When the degrees are determined by <code>-filter:v "PI/180*degrees"</code>

for example 
 <code>-filter:v "45*PI/180"</code> for 45 degrees

A nice explanation is here
<a href="https://superuser.com/questions/578321/how-to-rotate-a-video-180-with-ffmpeg">https://superuser.com/questions/578321/how-to-rotate-a-video-180-with-ffmpeg</a>

blocks|key|428434|text|或者..。要更改现有文件中的标记，请执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|428435|读取当前旋转|428436|exiftool+-Rotation+<file>|code-block|syntax|javascript|428437|然后，例如：|428438|exiftool+-Rotation=180+<file>|428439|将其设置为180|428440|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Or... to simply change the tag in an existing file:

Read the current rotation

<pre><code>exiftool -Rotation &lt;file&gt;
</code></pre>

then, for example:

<pre><code>exiftool -Rotation=180 &lt;file&gt;
</code></pre>

to set it to 180

When I try to upload videos captured from my iPhone in my app, the server performs a conversion from .mov to .mp4 so that it can be played in other platforms. However the problem is that when I shoot the video (in portrait orientation) and it is converted (using ffmpeg) and then played back from the server, it appears to be rotated. Any idea?

video captured from iphone gets rotated when converted to .mp4 using ffmpeg

服务器

当我尝试在我的应用程序中上传从我的iPhone捕获的视频时，服务器执行从.mov到.mp4的转换，以便可以在其他平台上播放。然而，问题是，当我拍摄视频(在纵向)，它被转换(使用ffmpeg)，然后从服务器播放，它似乎是旋转的。有什么想法吗？

问从iphone捕获的视频在使用ffmpeg转换为.mp4时会发生旋转
EN

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问从iphone捕获的视频在使用ffmpeg转换为.mp4时会发生旋转
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