https://aznot.com/index.php?action=history&feed=atom&title=Linux%2Fffmpeg 2026-05-02T15:26:13Z Revision history for this page on the wiki MediaWiki 1.41.0 https://aznot.com/index.php?title=Linux/ffmpeg&diff=9180&oldid=prev 2025-11-21T05:10:24Z

<p><span dir="auto"><span class="autocomment">Extract Music from mp4</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 05:10, 21 November 2025</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l18">Line 18:</td> <td colspan="2" class="diff-lineno">Line 18:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>m4a:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>m4a:</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  ffmpeg -i input.mp4 -vn -c:a copy output.m4a</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  ffmpeg -i input.mp4 -vn -c:a copy output.m4a</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">== fade in music ==</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"> ffmpeg -i input.mp3 -af "afade=type=in:start_time=0:duration=5" output.mp3</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">-af "afade=type=in:start_time=0:duration=5": Applies the audio fade filter.</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">*    type=in: Indicates a fade-in effect.</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">*    start_time=0: Specifies the time in seconds where the fade-in should begin (in this case, the beginning of the audio).</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">*    duration=5: Sets the duration of the fade-in in seconds.</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== jpeg slideshow ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== jpeg slideshow ==</div></td></tr> </table>

Kenneth https://aznot.com/index.php?title=Linux/ffmpeg&diff=5699&oldid=prev 2020-08-17T02:05:50Z

<p><span dir="auto"><span class="autocomment">Extract Music from mp4</span></span></p> <p><b>New page</b></p><div>== Installation ==<br /> <br /> Ubuntu: [https://github.com/adaptlearning/adapt_authoring/wiki/Installing-FFmpeg] [https://askubuntu.com/questions/691109/how-do-i-install-ffmpeg-and-codecs] [https://www.faqforge.com/linux/how-to-install-ffmpeg-on-ubuntu-14-04/]<br /> sudo add-apt-repository ppa:mc3man/trusty-media <br /> sudo apt-get update <br /> sudo apt-get install ffmpeg <br /> # sudo apt-get install frei0r-plugins<br /> # sudo apt-get install ffmpeg gstreamer0.10-ffmpeg<br /> <br /> == convert flv to mp4 ==<br /> <br /> See [[flv]]<br /> <br /> == Extract Music from mp4 ==<br /> <br /> See [[mp4]]<br /> <br /> m4a:<br /> ffmpeg -i input.mp4 -vn -c:a copy output.m4a<br /> <br /> == jpeg slideshow ==<br /> <br /> mkdir show<br /> x=1 ; for i in *jpg; do counter=$(printf %05d $x); ln &quot;$i&quot; show/img&quot;$counter&quot;.jpg; x=$(($x+1)); done<br /> cd show<br /> ffmpeg -r 10 -i img%05d.jpg -c:v libx264 out.mp4<br /> <br /> ffmpeg -r 1/5 -start_number 2 -i img%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4<br /> ffmpeg -r 1/5 -i img%03d.png -c:v libx264 -vf fps=25 -pix_fmt yuv420p out.mp4<br /> <br /> ffmpeg -framerate 1/5 -i img%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4<br /> <br /> ffmpeg -f image2 -i /tmp/img%03d.jpg /tmp/a.mpg<br /> <br /> ffmpeg -r 60 -f image2 -s 1920x1080 -i pic%04d.png -vcodec libx264 -crf 25 -pix_fmt yuv420p test.mp4<br /> # %04d means that zeros will be padded until the length of the string is 4<br /> # -r is the framerate (fps)<br /> # -crf is the quality, lower means better quality, 15-25 is usually good<br /> # -s is the resolution<br /> # -pix_fmt yuv420p specifies the pixel format, change this as needed<br /> <br /> References:<br /> * Using ffmpeg to convert a set of images into a video - http://hamelot.io/visualization/using-ffmpeg-to-convert-a-set-of-images-into-a-video/<br /> * FFmpeg create video from images - Stack Overflow - http://stackoverflow.com/questions/24961127/ffmpeg-create-video-from-images<br /> * linux - ffmpeg: create a video from images - Super User - http://superuser.com/questions/624567/ffmpeg-create-a-video-from-images<br /> * How to losslessly encode a jpg image sequence to a video in ffmpeg? - Video Production Stack Exchange - http://video.stackexchange.com/questions/7903/how-to-losslessly-encode-a-jpg-image-sequence-to-a-video-in-ffmpeg<br /> * Create a video slideshow from images – FFmpeg - http://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images<br /> <br /> == keywords ==</div>

Kenneth