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<body><br /><p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">Hi. When I try to compile the following line of code</p>
<br /><p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">av_channel_layout_copy(&c->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO);</p>
<br /><p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">taken from mux.c example I obtain the error:</p>
<br /><p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">/home/denis/Cpp/ffmpeg-6.0/libavutil/channel_layout.h:362: <strong>error: taking address of rvalue [-fpermissive]</strong></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">../../ffmpeg-6.0/libavutil/channel_layout.h:362:5: error: taking address of rvalue [-fpermissive]</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> 362 | { .order = AV_CHANNEL_ORDER_NATIVE, .nb_channels = (nb), .u = { .mask = (m) }}</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">../../ffmpeg-6.0/libavutil/channel_layout.h:369:45: note: in expansion of macro ‘AV_CHANNEL_LAYOUT_MASK’</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> 369 | #define AV_CHANNEL_LAYOUT_STEREO AV_CHANNEL_LAYOUT_MASK(2, AV_CH_LAYOUT_STEREO)</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> | ^~~~~~~~~~~~~~~~~~~~~~</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">../ffmpegTest/main.cpp:157:65: note: in expansion of macro ‘AV_CHANNEL_LAYOUT_STEREO’</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> 157 | av_channel_layout_copy(&c->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO);</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> | ^~~~~~~~~~~~~~~~~~~~~~~~</p>
<br /><p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">How can I translate it to work in Windows, Linux and Mac?</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">Something like this?</p>
<br /><p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> AVChannelLayout a= AV_CHANNEL_LAYOUT_STEREO;</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> av_channel_layout_copy(&c->ch_layout, &a);</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br />-- </p>
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