Merge pull request #393 from amiaopensource/kn/remove-unnecessary-command

Remove MKV → MP4 command
update recipe list
2025-10-18 11:50:06 +02:00 · 2019-08-01 07:32:51 +12:00 · 2019-07-31 16:50:39 +02:00 · 2019-07-31 23:37:53 +12:00 · 2019-07-19 19:34:49 +02:00 · 2019-07-19 13:33:24 -04:00
2 changed files with 2 additions and 27 deletions
--- a/index.html
+++ b/index.html
@@ -213,28 +213,6 @@
    </div>
    <!-- End Basic rewrap command -->

-    <!-- MKV to MP4 -->
-    <label class="recipe" for="mkv_to_mp4">Convert Matroska (MKV) to MP4</label>
-    <input type="checkbox" id="mkv_to_mp4">
-    <div class="hiding">
-      <h3>MKV to MP4</h3>
-      <p><code>ffmpeg -i <em>input_file</em>.mkv -c:v copy -c:a aac <em>output_file</em>.mp4</code></p>
-      <p>This will convert your Matroska (MKV) files to MP4 files.</p>
-      <dl>
-        <dt>ffmpeg</dt><dd>starts the command</dd>
-        <dt>-i <em>input_file</em></dt><dd>path and name of the input file<br>
-        The extension for the Matroska container is <code>.mkv</code>.</dd>
-        <dt>-c:v copy</dt><dd>copies the video stream without re-encoding it</dd>
-        <dt>-c:a aac</dt><dd>re-encodes the audio stream using the AAC audio codec<br>
-        Note that sadly MP4 cannot contain sound encoded by a PCM (Pulse-Code Modulation) audio codec.<br>
-        For silent videos you can replace <code>-c:a aac</code> by <code>-an</code>, which means that there will be no audio track in the output file.</dd>
-        <dt><em>output_file</em></dt><dd>path and name of the output file<br>
-        The extension for the MP4 container is <code>.mp4</code>.</dd>
-      </dl>
-      <p class="link"></p>
-    </div>
-    <!-- ends MKV to MP4 -->
-
    <!-- Rewrap DV -->
    <label class="recipe" for="rewrap-dv">Rewrap DV video to .dv file</label>
    <input type="checkbox" id="rewrap-dv">
@@ -294,7 +272,7 @@
    <input type="checkbox" id="transcode_h264">
    <div class="hiding">
      <h3>Transcode to H.264</h3>
-      <p><code>ffmpeg -i <em>input_file</em> -c:v libx264 -pix_fmt yuv420p -c:a aac -map 0:a <em>output_file</em></code></p>
+      <p><code>ffmpeg -i <em>input_file</em> -c:v libx264 -pix_fmt yuv420p -c:a aac <em>output_file</em></code></p>
      <p>This command takes an input file and transcodes it to H.264 with an .mp4 wrapper, audio is transcoded to AAC. The libx264 codec defaults to a “medium” preset for compression quality and a CRF of 23. CRF stands for constant rate factor and determines the quality and file size of the resulting H.264 video. A low CRF means high quality and large file size; a high CRF means the opposite.</p>
      <dl>
        <dt>ffmpeg</dt><dd>starts the command</dd>
@@ -303,7 +281,6 @@
        <dt>-pix_fmt yuv420p</dt><dd>libx264 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. In order to allow the video to play in all players, you can specify 4:2:0 chroma subsampling.</dd>
        <dt>-c:a aac</dt><dd>encode audio as AAC.<br>
          AAC is the codec most often used for audio streams within an .mp4 container.</dd>
-        <dt>-map 0:a</dt><dd>maps all audio tracks (default is first two)</dd>
        <dt><em>output_file</em></dt><dd>path, name and extension of the output file</dd>
      </dl>
      <p>In order to optimize the file for streaming, you can add this preset:</p>
--- a/recipes.txt
+++ b/recipes.txt
@@ -1,13 +1,11 @@
 # Basic rewrap command
 ffmpeg -i input_file.ext -c copy -map 0 output_file.ext
-# Convert Matroska (MKV) to MP4
-ffmpeg -i input_file.mkv -c:v copy -c:a aac output_file.mp4
 # Rewrap DV video to .dv file
 ffmpeg -i input_file -f rawvideo -c:v copy output_file.dv
 # Transcode to deinterlaced Apple ProRes LT
 ffmpeg -i input_file -c:v prores -profile:v 1 -vf yadif -c:a pcm_s16le output_file.mov
 # Transcode to an H.264 access file
-ffmpeg -i input_file -c:v libx264 -pix_fmt yuv420p -c:a aac -map 0:a output_file
+ffmpeg -i input_file -c:v libx264 -pix_fmt yuv420p -c:a aac output_file
 # Transcode from DCP to an H.264 access file
 ffmpeg -i input_video_file.mxf -i input_audio_file.mxf -c:v libx264 -pix_fmt yuv420p -c:a aac output_file.mp4
 # Transcode your file with the FFV1 Version 3 Codec in a Matroska container
Author	SHA1	Message	Date
Katherine Frances Nagels	839d50111e	Merge pull request #393 from amiaopensource/kn/remove-unnecessary-command Remove MKV → MP4 command	2019-08-01 07:32:51 +12:00
Reto Kromer	a6dd9c203c	update recipe list	2019-07-31 16:50:39 +02:00
kfrn	3402d968a7	Remove MKV → MP4 command Addressing user feedback received by Andrew Weaver (@privatezero). When the source file is ffv1 in MKV, the command will fail on the `-c:v copy` flag, since MP4s can't house ffv1. Therefore, the command is misleading, and has limited value from an archival perspective. We already have a basic rewrap command (which includes a note addressing the possibility of stream/wrapper incompability), so I think our bases are covered with that. See https://github.com/amiaopensource/ffmprovisr/issues/392	2019-07-31 23:37:53 +12:00
Reto Kromer	283756f8cf	Merge pull request #390 (Revert "update recipe list")	2019-07-19 19:34:49 +02:00
Ashley	d28ae29f5c	Merge pull request #389 from amiaopensource/revert-387-issue-383 Revert "Adds mapping all audio to access script"	2019-07-19 13:33:24 -04:00
Reto Kromer	2be5576012	Revert "update recipe list"	2019-07-19 19:25:01 +02:00
Ashley	43c98527a7	Revert "Adds mapping all audio to access script"	2019-07-19 13:11:06 -04:00