mirror of
https://github.com/amiaopensource/ffmprovisr.git
synced 2025-10-17 19:30:00 +02:00
Compare commits
26 Commits
v2017-03-0
...
v2017-04-0
| Author | SHA1 | Date | |
|---|---|---|---|
|
db202300e4 | ||
|
bf55928a63 | ||
|
|
6cea5862d6 | ||
|
|
dca518a9b6 | ||
|
|
45828357c9 | ||
|
10765da46a | ||
|
|
ab2e6fb789 | ||
|
|
e3e48ded1a | ||
|
|
9d58f313d4 | ||
|
|
1371b380c9 | ||
|
|
dcb74e8da6 | ||
|
|
bd0ac73d78 | ||
|
|
7e7da29093 | ||
|
|
47acc400ce | ||
|
|
c117e18c0c | ||
|
|
0921bd68d5 | ||
|
|
d0e13f3eb6 | ||
|
|
82a1cfeb8b | ||
|
472fcfe833 | ||
|
|
0907590913 | ||
|
|
0ed5cfff65 | ||
|
|
e3deb3af4e | ||
|
|
5869850d4b | ||
|
|
a5a49e1f28 | ||
|
|
cdd65fd765 | ||
|
|
c85d6c5874 |
24
css/css.css
24
css/css.css
@@ -1,4 +1,4 @@
|
||||
h1,h2,h3,h4,h5,h6 {
|
||||
h1, h2, h3, h4, h5, h6 {
|
||||
font-family: 'Montserrat', sans-serif;
|
||||
}
|
||||
|
||||
@@ -11,13 +11,14 @@ dd {
|
||||
}
|
||||
|
||||
dt {
|
||||
font-family: Menlo,Monaco,Consolas,"Courier New",monospace;
|
||||
font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
|
||||
}
|
||||
|
||||
img {
|
||||
display: block;
|
||||
margin-left: auto;
|
||||
margin-right: auto;
|
||||
width: 100%;
|
||||
}
|
||||
|
||||
.sample-image {
|
||||
@@ -37,9 +38,6 @@ div {
|
||||
|
||||
.btn {
|
||||
margin: 8px;
|
||||
}
|
||||
|
||||
.btn {
|
||||
display: inline-block;
|
||||
vertical-align: middle;
|
||||
-webkit-transform: translateZ(0);
|
||||
@@ -53,6 +51,7 @@ div {
|
||||
-webkit-transition-duration: 0.3s;
|
||||
transition-duration: 0.3s;
|
||||
}
|
||||
|
||||
.btn:before {
|
||||
content: "💫";
|
||||
position: absolute;
|
||||
@@ -67,6 +66,7 @@ div {
|
||||
-webkit-transition-timing-function: ease-out;
|
||||
transition-timing-function: ease-out;
|
||||
}
|
||||
|
||||
.btn:hover:before, .btn:focus:before, .btn:active:before {
|
||||
-webkit-transform: scale(1.3) translateZ(0);
|
||||
transform: scale(1.3) translateZ(0);
|
||||
@@ -78,7 +78,7 @@ div {
|
||||
font-size: 90%;
|
||||
color: #c7254e;
|
||||
background-color: #f9f2f4;
|
||||
border-radius: 4px
|
||||
border-radius: 4px;
|
||||
}
|
||||
|
||||
.beware {
|
||||
@@ -88,3 +88,15 @@ div {
|
||||
.footnote {
|
||||
font-size: 90%;
|
||||
}
|
||||
|
||||
@media only screen and (min-width: 576px) {
|
||||
img {
|
||||
max-width: 60%;
|
||||
}
|
||||
}
|
||||
|
||||
@media only screen and (min-width: 992px) {
|
||||
img {
|
||||
width: 100%;
|
||||
}
|
||||
}
|
||||
|
||||
BIN
img/ivtc_originalvideo.gif
Normal file
BIN
img/ivtc_originalvideo.gif
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 1.4 MiB |
BIN
img/ivtc_result.gif
Normal file
BIN
img/ivtc_result.gif
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 1.4 MiB |
113
index.html
113
index.html
@@ -3,11 +3,9 @@
|
||||
<head>
|
||||
<title>ffmprovisr</title>
|
||||
<meta charset="utf-8">
|
||||
|
||||
<link href='https://fonts.googleapis.com/css?family=Montserrat|Merriweather' rel='stylesheet' type='text/css'>
|
||||
<link href="https://fonts.googleapis.com/css?family=Montserrat|Merriweather" rel="stylesheet" type="text/css">
|
||||
<link rel="stylesheet" href="css/bootstrap.min.css">
|
||||
<link rel="stylesheet" href="css/css.css">
|
||||
|
||||
<script src="js/jquery.min.js"></script>
|
||||
<script src="js/js.js"></script>
|
||||
<script src="js/bootstrap.min.js"></script>
|
||||
@@ -32,7 +30,8 @@
|
||||
<p>For instructions on how to install FFmpeg on Mac, Linux, and Windows, refer to Reto Kromer’s <a href="https://avpres.net/FFmpeg/#ch1" target="_blank">installation instructions</a>.</p>
|
||||
<p>For Bash and command line basics, try the <a href="https://learnpythonthehardway.org/book/appendixa.html" target="_blank">Command Line Crash Course</a>. For a little more context presented in an ffmprovisr style, try <a href="http://explainshell.com/" target="_blank">explainshell.com</a>!</p>
|
||||
<h5>License</h5>
|
||||
<p><a target="_blank" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png"></a><br>This work is licensed under a <a href="http://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a></p>
|
||||
<p><a target="_blank" href="https://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png"></a><br>
|
||||
This work is licensed under a <a href="https://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a>.</p>
|
||||
<h5>Sister projects</h5>
|
||||
<p><a target="_blank" href="http://dd388.github.io/crals/">Script Ahoy</a>: Community Resource for Archivists and Librarians Scripting</p>
|
||||
<p><a target="_blank" href="https://datapraxis.github.io/sourcecaster/">The Sourcecaster</a>: an app that helps you use the command line to work through common challenges that come up when working with digital primary sources.</p>
|
||||
@@ -87,7 +86,7 @@
|
||||
<dt>-c:a aac</dt><dd>sets the audio codec to AAC</dd>
|
||||
<dt>-b:a 128k</dt><dd>sets the bitrate of the audio to 128k</dd>
|
||||
<dt>-dither_method modified_e_weighted</dt><dd>Dither makes sure you don’t unnecessarily truncate the dynamic range of your audio.</dd>
|
||||
<dt>-ar 44100</dt><dd>sets the audio sampling frequency to 44100 Hz, or 44.1 kHz, or "CD quality"</dd>
|
||||
<dt>-ar 44100</dt><dd>sets the audio sampling frequency to 44100 Hz, or 44.1 kHz, or “CD quality”</dd>
|
||||
<dt><i>output_file</i></dt><dd>path and name of the output file</dd>
|
||||
</dl>
|
||||
<p class="link"></p>
|
||||
@@ -154,9 +153,12 @@
|
||||
<p>In order to use the same basic command to make a higher quality file, you can add some of these presets:</p>
|
||||
<p><code>ffmpeg -i <i>input_file</i> -c:v libx264 -pix_fmt yuv420p -preset veryslow -crf 18 -c:a copy <i>output_file</i></code></p>
|
||||
<dl>
|
||||
<dt>-preset <i>veryslow</i></dt><dd>This option tells ffmpeg to use the slowest preset possible for the best compression quality.</dd>
|
||||
<dt>-crf <i>18</i></dt><dd>Specifying a lower CRF will make a larger file with better visual quality. 18 is often considered a “visually lossless” compression.</dd>
|
||||
<dt>-preset <i>veryslow</i></dt><dd>This option tells ffmpeg to use the slowest preset possible for the best compression quality.<br>
|
||||
Available presets, from slowest to fastest, are: <code>veryslow</code>, <code>slower</code>, <code>slow</code>, <code>medium</code>, <code>fast</code>, <code>faster</code>, <code>veryfast</code>, <code>superfast</code>, <code>ultrafast</code>.</dd>
|
||||
<dt>-crf <i>18</i></dt><dd>Specifying a lower CRF will make a larger file with better visual quality. For H.264 files being encoded with a 4:2:0 chroma subsampling scheme (i.e., using <code>-pix_fmt yuv420p</code>), the scale ranges between 0-51, with 0 being lossless and 51 the worst possible quality.<br>
|
||||
If no crf is specified, <code>libx264</code> will use a default value of 23. 18 is often considered a “visually lossless” compression.</dd>
|
||||
</dl>
|
||||
<p>For more information, see the <a href="https://trac.ffmpeg.org/wiki/Encode/H.264" target="_blank">FFmpeg and H.264 Encoding Guide</a> on the ffmpeg wiki.</p>
|
||||
<p class="link"></p>
|
||||
</div>
|
||||
</div>
|
||||
@@ -271,7 +273,7 @@
|
||||
</div>
|
||||
<!-- ends SD to HD -->
|
||||
|
||||
<!-- 16:9 to 4:3 -->
|
||||
<!-- 16:9 to 4:3 -->
|
||||
<span data-toggle="modal" data-target="#HD_SD"><button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Transform 16:9 aspect ratio video into 4:3 with letterbox">16:9 to 4:3</button></span>
|
||||
<div id="HD_SD" class="modal fade" tabindex="-1" role="dialog">
|
||||
<div class="modal-dialog modal-lg">
|
||||
@@ -283,7 +285,8 @@
|
||||
<dl>
|
||||
<dt>ffmpeg</dt><dd>starts the command</dd>
|
||||
<dt>-i <i>input_file</i></dt><dd>path, name and extension of the input file</dd>
|
||||
<dt>-filter:v "pad=iw:iw*3/4:(ow-iw)/2:(oh-ih)/2"</dt><dd>video padding<br>This resolution independent formula is actually padding any aspect ratio into 4:3 by letterboxing, because the video filter uses relative values for input width (iw), input height (ih), output width (ow) and output height (oh).</dd>
|
||||
<dt>-filter:v "pad=iw:iw*3/4:(ow-iw)/2:(oh-ih)/2"</dt><dd>video padding<br>
|
||||
This resolution independent formula is actually padding any aspect ratio into 4:3 by letterboxing, because the video filter uses relative values for input width (iw), input height (ih), output width (ow) and output height (oh).</dd>
|
||||
<dt>-c:a copy</dt><dd>re-encodes using the same audio codec<br>
|
||||
For silent videos you can replace <code>-c:a copy</code> by <code>-an</code>.</dd>
|
||||
<dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd>
|
||||
@@ -349,7 +352,7 @@
|
||||
</div>
|
||||
<!-- ends Change display aspect ratio without re-encoding video -->
|
||||
|
||||
<!-- MKV to MP4 -->
|
||||
<!-- MKV to MP4 -->
|
||||
<span data-toggle="modal" data-target="#mkv_to_mp4"><button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Convert Matroska (MKV) to MP4">MKV to MP4</button></span>
|
||||
<div id="mkv_to_mp4" class="modal fade" tabindex="-1" role="dialog">
|
||||
<div class="modal-dialog modal-lg">
|
||||
@@ -376,7 +379,7 @@
|
||||
</div>
|
||||
<!-- ends MKV to MP4 -->
|
||||
|
||||
<!-- Images to GIF -->
|
||||
<!-- Images to GIF -->
|
||||
<span data-toggle="modal" data-target="#img_to_gif"><button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Converts images to GIF">Images to GIF</button></span>
|
||||
<div id="img_to_gif" class="modal fade" tabindex="-1" role="dialog">
|
||||
<div class="modal-dialog modal-lg">
|
||||
@@ -384,14 +387,14 @@
|
||||
<div class="well">
|
||||
<h3>Images to GIF</h3>
|
||||
<p><code>ffmpeg -f image2 -framerate 9 -pattern_type glob -i <i>"input_image_*.jpg"</i> -vf scale=250x250 <i>output_file</i>.gif</code></p>
|
||||
<p>This will convert a series of image files into a gif.</p>
|
||||
<p>This will convert a series of image files into a GIF.</p>
|
||||
<dl>
|
||||
<dt>ffmpeg</dt><dd>starts the command</dd>
|
||||
<dt>-f image2</dt><dd>forces input or output file format. <code>image2</code> specifies the image file demuxer.</dd>
|
||||
<dt>-framerate 9</dt><dd>sets framerate to 9 frames per second</dd>
|
||||
<dt>-pattern_type glob</dt><dd>tells ffmpeg that the following mapping should "interpret like a <a href="https://en.wikipedia.org/wiki/Glob_%28programming%29" target="_blank">glob</a>" (a "global command" function that relies on the * as a wildcard and finds everything that matches)</dd>
|
||||
<dt>-i <i>"input_image_*.jpg"</i></dt><dd>maps all files in the directory that start with input_image_, for example input_image_001.jpg, input_image_002.jpg, input_image_003.jpg... etc.<br>
|
||||
(The quotation marks are necessary for the above "glob" pattern!)</dd>
|
||||
(The quotation marks are necessary for the above “glob” pattern!)</dd>
|
||||
<dt>-vf scale=250x250</dt><dd>filter the video to scale it to 250x250; -vf is an alias for -filter:v</dd>
|
||||
<dt><i>output_file.gif</i></dt><dd>path and name of the output file</dd>
|
||||
</dl>
|
||||
@@ -486,13 +489,13 @@
|
||||
<dt>ffmpeg</dt><dd>starts the command</dd>
|
||||
<dt>-i <i>input file</i></dt><dd>path, name and extension of the input file</dd>
|
||||
<dt>-c:v libx264</dt><dd>tells ffmpeg to encode the video stream as H.264</dd>
|
||||
<dt>-vf</dt><dd>video filtering will be used<dd>
|
||||
<dt>-vf</dt><dd>video filtering will be used (<code>-vf</code> is an alias of <code>-filter:v</code>)</dd>
|
||||
<dt><i>"</i></dt><dd>start of filtergraph (see below)</dd>
|
||||
<dt><i>yadif</i></dt><dd>deinterlacing filter (‘yet another deinterlacing filter’)<br>
|
||||
By default, <a href="https://ffmpeg.org/ffmpeg-filters.html#yadif-1" target="_blank">yadif</a> will output one frame for each frame. Outputting one frame for each <i>field</i> (thereby doubling the frame rate) with <code>yadif=1</code> may produce visually better results.</dd>
|
||||
<dt><i>,</i></dt><dd>separates filters</dd>
|
||||
<dt><i>format=yuv420p</i></dt><dd>chroma subsampling set to 4:2:0<br>
|
||||
By default, <code>libx264</code> will use a chroma subsampling scheme that is the closest match to that of the input. This can result in Y′C<sub>B</sub>C<sub>R</sub> 4:2:0, 4:2:2, or 4:4:4 chroma subsampling. QuickTime and most other non-FFmpeg based players can’t decode H.264 files that are not 4:2:0, therefore it's advisable to specify 4:2:0 chroma subsampling.</dd>
|
||||
By default, <code>libx264</code> will use a chroma subsampling scheme that is the closest match to that of the input. This can result in Y′C<sub>B</sub>C<sub>R</sub> 4:2:0, 4:2:2, or 4:4:4 chroma subsampling. QuickTime and most other non-FFmpeg based players can’t decode H.264 files that are not 4:2:0, therefore it’s advisable to specify 4:2:0 chroma subsampling.</dd>
|
||||
<dt><i>"</i></dt><dd>end of filtergraph</dd>
|
||||
<dt><i>output file</i></dt><dd>path, name and extension of the output file</dd>
|
||||
</dl>
|
||||
@@ -559,10 +562,10 @@
|
||||
<img src="./img/colourspace_metadata_mediainfo.png" alt="MediaInfo screenshots of colourspace metadata"><br>
|
||||
<p><span class="beware">⚠</span> Using this command it is possible to add Rec.709 tags to a file that is actually Rec.601 (etc), so apply with caution!</p>
|
||||
<p>These commands are relevant for H.264 and H.265 videos, encoded with <code>libx264</code> and <code>libx265</code> respectively.</p>
|
||||
<p><b>Note</b>: If you wish to embed colourspace metadata <i>without</i> changing to another colourspace, omit <code>-vf colormatrix=src:dst</code>. However, since it is <code>libx264</code>/<code>libx265</code> that writes the metadata, it's not possible to add these tags without reencoding the video stream.</p>
|
||||
<p><b>Note</b>: If you wish to embed colourspace metadata <i>without</i> changing to another colourspace, omit <code>-vf colormatrix=src:dst</code>. However, since it is <code>libx264</code>/<code>libx265</code> that writes the metadata, it’s not possible to add these tags without reencoding the video stream.</p>
|
||||
<p>For all possible values for <code>-color_primaries</code>, <code>-color_trc</code>, and <code>-colorspace</code>, see the ffmpeg documentation on <a href="./index.html#Codec-Options" target="_blank">codec options</a>.</p>
|
||||
<hr>
|
||||
<p id="fn1" class="footnote">1. Out of step with the regular pattern, <code>-color-trc</code> doesn't accept <code>bt470bg</code>; it is instead here referred to directly as gamma.<br>
|
||||
<p id="fn1" class="footnote">1. Out of step with the regular pattern, <code>-color_trc</code> doesn’t accept <code>bt470bg</code>; it is instead here referred to directly as gamma.<br>
|
||||
In the Rec.601 standard, 525-line/NTSC and 625-line/PAL video have assumed gammas of 2.2 and 2.8 respectively. <a href="#ref1" title="Jump back.">↩</a></p>
|
||||
<p class="link"></p>
|
||||
</div>
|
||||
@@ -571,6 +574,42 @@
|
||||
</div>
|
||||
<!-- ends Convert colourspace -->
|
||||
|
||||
<!-- Inverse telecine -->
|
||||
<span data-toggle="modal" data-target="#inverse-telecine"><button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Inverse telecine video">Inverse telecine</button></span>
|
||||
<div id="inverse-telecine" class="modal fade" tabindex="-1" role="dialog">
|
||||
<div class="modal-dialog modal-lg">
|
||||
<div class="modal-content">
|
||||
<div class="well">
|
||||
<h3>Inverse telecine a video file</h3>
|
||||
<p><code>ffmpeg -i <i>input_file</i> -c:v libx264 -vf "fieldmatch,yadif,decimate" <i>output_file</i></code></p>
|
||||
<p>The inverse telecine procedure reverses the <a href="https://en.wikipedia.org/wiki/Three-two_pull_down">3:2 pull down</a> process, restoring 29.97fps interlaced video to the 24fps frame rate of the original film source.</p>
|
||||
<dl>
|
||||
<dt>ffmpeg</dt><dd>starts the command</dd>
|
||||
<dt>-i <i>input file</i></dt><dd>path, name and extension of the input file</dd>
|
||||
<dt>-c:v libx264</dt><dd>encode video as H.264</dd>
|
||||
<dt>-vf "fieldmatch,yadif,decimate"</dt><dd>applies these three video filters to the input video.<br>
|
||||
<a href="https://ffmpeg.org/ffmpeg-filters.html#fieldmatch">Fieldmatch</a> is a field matching filter for inverse telecine - it reconstructs the progressive frames from a telecined stream.<br>
|
||||
<a href="https://ffmpeg.org/ffmpeg-filters.html#yadif-1">Yadif</a> (‘yet another deinterlacing filter’) deinterlaces the video. (Note that ffmpeg also includes several other deinterlacers).<br>
|
||||
<a href="https://ffmpeg.org/ffmpeg-filters.html#decimate-1">Decimate</a> deletes duplicated frames.</dd>
|
||||
<dt><i>output file</i></dt><dd>path, name and extension of the output file</dd>
|
||||
</dl>
|
||||
<p> <code>"fieldmatch,yadif,decimate"</code> is an ffmpeg <a href="https://trac.ffmpeg.org/wiki/FilteringGuide#FiltergraphChainFilterrelationship" target="_blank">filtergraph</a>. Here the filtergraph is made up of one filter chain, which is itself made up of the three filters (separated by commas).<br>
|
||||
The enclosing quote marks are necessary when you use spaces within the filtergraph, e.g. <code>-vf "fieldmatch, yadif, decimate"</code>, and are included above as an example of good practice.</p>
|
||||
<p>Note that if applying an inverse telecine procedure to a 29.97i file, the output framerate will actually be 23.976fps.</p>
|
||||
<p>This command can also be used to restore other framerates.</p>
|
||||
<div class="sample-image">
|
||||
<h4>Example</h4>
|
||||
<p>Before and after inverse telecine:</p>
|
||||
<img src="img/ivtc_originalvideo.gif" alt="GIF of original video">
|
||||
<img src="img/ivtc_result.gif" alt="GIF of video after inverse telecine">
|
||||
</div>
|
||||
<p class="link"></p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<!-- ends Inverse telecine -->
|
||||
|
||||
</div>
|
||||
<div class="well">
|
||||
<h4>Filters</h4>
|
||||
@@ -776,16 +815,25 @@
|
||||
<p>The first command will use the palettegen filter to create a custom palette, then the second command will create the GIF with the paletteuse filter. The result is a high quality GIF.</p>
|
||||
<dl>
|
||||
<dt>ffmpeg</dt><dd>starts the command</dd>
|
||||
<dt>-ss <i>HH:MM:SS</i></dt><dd>starting point of the gif. If a plain numerical value is used it will be interpreted as seconds</dd>
|
||||
<dt>-ss <i>HH:MM:SS</i></dt><dd>starting point of the GIF. If a plain numerical value is used it will be interpreted as seconds</dd>
|
||||
<dt>-i <i>input_file</i></dt><dd>path, name and extension of the input file</dd>
|
||||
<dt>-filter_complex "fps=<i>frame rate</i>,scale=<i>width</i>:<i>height</i>,palettegen"</dt><dd>a complex filtergraph using the fps filter to set frame rate, the scale filter to resize, and the palettegen filter to generate the palette. The scale value of <i>-1</i> preserves the aspect ratio</dd>
|
||||
<dt>-filter_complex "fps=<i>frame rate</i>,scale=<i>width</i>:<i>height</i>,palettegen"</dt><dd>a complex filtergraph.<br>
|
||||
Firstly, the fps filter sets the frame rate.<br>
|
||||
Then the scale filter resizes the image. You can specify both the width and the height, or specify a value for one and use a scale value of <i>-1</i> for the other to preserve the aspect ratio. (For example, <code>500:-1</code> would create a GIF 500 pixels wide and with a height proportional to the original video). In the first script above, <code>:flags=lanczos</code> specifies that the Lanczos rescaling algorithm will be used to resize the image.<br>
|
||||
Lastly, the palettegen filter generates the palette.</dd>
|
||||
<dt>-t <i>3</i></dt><dd>duration in seconds (here 3; can be specified also with a full timestamp, i.e. here 00:00:03)</dd>
|
||||
<dt>-loop <i>6</i></dt><dd>number of times to loop the gif. A value of <i>-1</i> will disable looping. Omitting <i>-loop</i> will use the default which will loop infinitely</dd>
|
||||
<dt>-loop <i>6</i></dt><dd>number of times to loop the GIF. A value of <i>-1</i> will disable looping. Omitting <i>-loop</i> will use the default which will loop infinitely</dd>
|
||||
<dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd>
|
||||
</dl>
|
||||
<p>The second command has a slightly different filtergraph, which breaks down as follows:</p>
|
||||
<dl>
|
||||
<dt>-filter_complex "[0:v]fps=10,scale=500:-1:flags=lanczos[v],[v][1:v]paletteuse"</dt><dd>
|
||||
<code>[0:v]fps=10,scale=500:-1:flags=lanczos[v]</code>: applies the fps and scale filters described above to the first input file (the video).<br>
|
||||
<code>[v][1:v]paletteuse"</code>: applies the <code>paletteuse</code> filter, setting the second input file (the palette) as the reference file.</dd>
|
||||
</dl>
|
||||
<p>Simpler GIF creation</p>
|
||||
<p><code>ffmpeg -ss HH:MM:SS -i <i>input_file</i> -vf "fps=10,scale=500:-1" -t 3 -loop 6 <i>output_file</i></code></p>
|
||||
<p>This is a quick and easy method. Dithering is more apparent than the above method using the palette* filters, but the file size will be smaller. Perfect for that “legacy” GIF look.</p>
|
||||
<p>This is a quick and easy method. Dithering is more apparent than the above method using the palette filters, but the file size will be smaller. Perfect for that “legacy” GIF look.</p>
|
||||
<p class="link"></p>
|
||||
</div>
|
||||
</div>
|
||||
@@ -1372,6 +1420,29 @@ foreach ($file in $inputfiles) {
|
||||
</div>
|
||||
<!-- ends Play VGA SMPTE bars -->
|
||||
|
||||
<!-- Broken File -->
|
||||
<span data-toggle="modal" data-target="#broken_file"><button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Make a broken file out of a perfectly good one">Broken file</button></span>
|
||||
<div id="broken_file" class="modal fade" tabindex="-1" role="dialog">
|
||||
<div class="modal-dialog modal-lg">
|
||||
<div class="modal-content">
|
||||
<div class="well">
|
||||
<h3>Makes a broken test file</h3>
|
||||
<p>Modifies an existing, functioning file and intentionally breaks it for testing purposes.</p>
|
||||
<p><code>ffmpeg -i <i>input_file</i> -bsf noise=1 -c copy <i>output_file</i></code></p>
|
||||
<dl>
|
||||
<dt>ffmpeg</dt><dd>starts the command</dd>
|
||||
<dt>-i <i>input_file</i></dt><dd>takes in a normal file</dd>
|
||||
<dt>-bsf noise=1</dt><dd>sets bitstream filters for all to 'noise'. Filters can be set on specific filters using syntax such as <code>-bsf:v</code> for video, <code>-bsf:a</code> for audio, etc. The <a target="_blank" href="https://www.ffmpeg.org/ffmpeg-bitstream-filters.html#noise">noise filter</a> intentionally damages the contents of packets without damaging the container. This sets the noise level to 1 but it could be left blank or any number above 0.</dd>
|
||||
<dt>-c copy</dt><dd>use stream copy mode to re-mux instead of re-encode</dd>
|
||||
<dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd>
|
||||
</dl>
|
||||
<p class="link"></p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<!-- ends Broken File -->
|
||||
|
||||
<!-- Sine wave -->
|
||||
<span data-toggle="modal" data-target="#sine_wave"><button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Generate a test audio file playing a sine wave">Sine wave</button></span>
|
||||
<div id="sine_wave" class="modal fade" tabindex="-1" role="dialog">
|
||||
|
||||
Reference in New Issue
Block a user