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    <p><img src="https://i.stack.imgur.com/h8joa.jpg" alt="6 video overlay with drawtext"></p> <h3>overlay</h3> <pre><code>ffmpeg -i input0 -i input1 -i input2 -i input3 -i input4 -i input5 \ -filter_complex \ "[0:v]pad=iw*3:ih*2[tl]; \ [tl][1:v]overlay=w[tc]; \ [tc][2:v]overlay=w*2[tr]; \ [tr][3:v]overlay=0:h[bl]; \ [bl][4:v]overlay=w:h[bc]; \ [bc][5:v]overlay=w*2:h[out]" \ -map "[out]" output.mp4 </code></pre> <p><code>[0:v]</code> is a <a href="https://ffmpeg.org/ffmpeg.html#Stream-specifiers-1" rel="noreferrer">stream specifier</a> and refers to the video stream of the first input. Since ffmpeg counts from 0 then <code>[4:v]</code> is the video stream of the fifth input.</p> <p><code>[tl]</code> is an example of a link label. In this example it was my way of saying "top left" and <code>[bc]</code> is short for "bottom center", but you can use just about any arbitrary name.</p> <h3>overlay with <code>setpts</code></h3> <p>Be aware that frames are taken from each input video in timestamp order, so if their initial timestamps differ it is a a good idea to use <code>setpts=PTS-STARTPTS</code> for each input to have them begin in the same zero timestamp:</p> <pre><code>ffmpeg -i input0 -i input1 -i input2 -i input3 -i input4 -i input5 \ -filter_complex \ "[0:v]setpts=PTS-STARTPTS[v0]; \ [1:v]setpts=PTS-STARTPTS[v1]; \ [2:v]setpts=PTS-STARTPTS[v2]; \ [3:v]setpts=PTS-STARTPTS[v3]; \ [4:v]setpts=PTS-STARTPTS[v4]; \ [5:v]setpts=PTS-STARTPTS[v5]; \ [v0]pad=iw*3:ih*2[tl]; \ [tl][v1]overlay=w[tc]; \ [tc][v2]overlay=w*2[tr]; \ [tr][v3]overlay=0:h[bl]; \ [bl][v4]overlay=w:h[bc]; \ [bc][v5]overlay=w*2:h[out]" \ -map "[out]" output.mp4 </code></pre> <h3>overlay with <code>setpts</code> and text</h3> <pre><code>ffmpeg -i input0 -i input1 -i input2 -i input3 -i input4 -i input5 \ -filter_complex \ "[0:v]setpts=PTS-STARTPTS,drawtext=fontfile=/Library/Fonts/Arial.ttf:fontsize=30:text='vid0':x=(w-text_w)/2:y=(h-text_h-line_h)/2[v0]; \ [1:v]setpts=PTS-STARTPTS,drawtext=fontfile=/Library/Fonts/Arial.ttf:fontsize=30:text='vid1':x=(w-text_w)/2:y=(h-text_h-line_h)/2[v1]; \ [2:v]setpts=PTS-STARTPTS,drawtext=fontfile=/Library/Fonts/Arial.ttf:fontsize=30:text='vid2':x=(w-text_w)/2:y=(h-text_h-line_h)/2[v2]; \ [3:v]setpts=PTS-STARTPTS,drawtext=fontfile=/Library/Fonts/Arial.ttf:fontsize=30:text='vid3':x=(w-text_w)/2:y=(h-text_h-line_h)/2[v3]; \ [4:v]setpts=PTS-STARTPTS,drawtext=fontfile=/Library/Fonts/Arial.ttf:fontsize=30:text='vid4':x=(w-text_w)/2:y=(h-text_h-line_h)/2[v4]; \ [5:v]setpts=PTS-STARTPTS,drawtext=fontfile=/Library/Fonts/Arial.ttf:fontsize=30:text='vid5':x=(w-text_w)/2:y=(h-text_h-line_h)/2[v5]; \ [v0]pad=iw*3:ih*2[tl]; \ [tl][v1]overlay=w[tc]; \ [tc][v2]overlay=w*2[tr]; \ [tr][v3]overlay=0:h[bl]; \ [bl][v4]overlay=w:h[bc]; \ [bc][v5]overlay=w*2:h[out]" \ -map "[out]" output.mp4 </code></pre> <h3>other stuff</h3> <ul> <li><p>Using <code>shortest=1</code> in the <code>overlay</code> filter will force the output to terminate when the shortest input terminates.</p></li> <li><p>Adding <code>format=yuv420p</code> at the end of your <a href="https://ffmpeg.org/ffmpeg-filters.html#Filtergraph-description" rel="noreferrer">filtergraph</a> will ensure your output uses a compatible pixel format for "dumb" players like QuickTime (this is not usually required but depends on the encoder and your input formats). Alternatively, you could use the <code>-pix_fmt yuv420p</code> output option but is less flexible than placing it wherever you want in your filtergraph.</p></li> <li><p>See the <a href="https://ffmpeg.org/ffmpeg-filters.html#pad" rel="noreferrer"><code>pad</code></a>, <a href="https://ffmpeg.org/ffmpeg-filters.html#overlay-1" rel="noreferrer"><code>overlay</code></a>, <a href="https://ffmpeg.org/ffmpeg-filters.html#setpts_002c-asetpts" rel="noreferrer"><code>setpts</code></a> and <a href="https://ffmpeg.org/ffmpeg-filters.html#drawtext-1" rel="noreferrer"><code>drawtext</code></a> filter documentation for more information and examples.</p></li> </ul>
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    1. COwow great, this perfect!
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    2. CO@Jarg Thanks (although your edit got rejected unfortunately). I updated the answer to explicitly map the filtergraph output. It is not always required, but it is recommended to do so.
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