Linux: "video to mp3" - Revision history

Lukas Dzunko at 17:47, 13 February 2016

2016-02-13T17:47:59Z

Lukas Dzunko: /* Step 3 - create mp3 file */

2014-03-14T19:19:29Z

‎Step 3 - create mp3 file

Lukas Dzunko: /* unrelated files */

2014-03-14T19:03:57Z

‎unrelated files

Lukas Dzunko: /* Step 1 - extract audio from video file */

2014-03-14T18:18:24Z

‎Step 1 - extract audio from video file

Lukas Dzunko: /* Step 2 - normalize tracks */

2014-03-14T18:02:05Z

‎Step 2 - normalize tracks

Lukas Dzunko: /* video with DTS audio track (5.1 or all other X.Y combinations) */

2014-03-14T17:26:03Z

‎video with DTS audio track (5.1 or all other X.Y combinations)

Lukas Dzunko: /* video with stereo audio track */

2014-03-14T17:21:08Z

‎video with stereo audio track

Lukas Dzunko at 17:20, 14 March 2014

2014-03-14T17:20:53Z

Lukas Dzunko at 17:15, 14 March 2014

2014-03-14T17:15:25Z

Lukas Dzunko: /* Step 1 extract audio from video file */

2014-03-14T17:08:57Z

‎Step 1 extract audio from video file

@@ Line 1: / Line 1: @@
 Problem: I have video file with concert or music show and I would like to play it in car or on phone.
-I both cases it is enough to have audio track and it is necessary to have correct format. My car radio can play only mp3 files (and of course regular cdda).
+In both cases it is enough to have audio track and it is necessary to have correct format. My car radio can play only mp3 files (and of course regular cdda).
 Here are steps how to get sound track from video and store it as mp3. It is possible to do it directly via <code>ffmpeg</code> but I prefer <code>lame</code> mp3 creator. Depending on source I normalize tracks before converting to mp3. This is also recommend only on lossless file formats.

@@ Line 51: / Line 51: @@
 * extreme - use this if you have really good equipment at home
 * insane - best quality regardless of size
-''For more details check man page of lame(1)'''
+''For more details check man page of lame(1)''
 Once I have all files prepared in directory I run:
 <pre>

@@ Line 27: / Line 27: @@
 I am using <code>normalize</code> tool to correct volume levels. Reason is simple. Different produces use different volume configuration or it was simple precaution for clipping in club recording.
 ==== unrelated files ====
-For loner recordings it is better to normalize files separately. I am using this approach for >30 minutes recordings.
+For longer recordings it is better to normalize files separately. I am using this approach for >30 minutes recordings.
 <pre>
 for a in *.wav
@@ Line 38: / Line 38: @@
 normalize -m *.wav
 </pre>
 ==== related files ====
 Related files are for example songs from one album. This mode retain relative volumes between songs and normalize all songs to maximum.

@@ Line 6: / Line 6: @@
 === Step 1 - extract audio from video file ===
-<code>ffmpeg</code> is powerful video converter. With correct option it can "dump" audio or directly create mp3. I am using following way to extract audio:
+<code>ffmpeg</code> is powerful video converter. With correct option it can "dump" audio track or directly encode it to mp3. I am using following way to extract audio:
 ==== video with stereo audio track ====
 <pre>

← Older revision		Revision as of 18:02, 14 March 2014
Line 25:		Line 25:

	=== Step 2 - normalize tracks ===		=== Step 2 - normalize tracks ===
		+	I am using <code>normalize</code> tool to correct volume levels. Reason is simple. Different produces use different volume configuration or it was simple precaution for clipping in club recording.
		+	==== unrelated files ====
		+	For loner recordings it is better to normalize files separately. I am using this approach for >30 minutes recordings.
		+	<pre>
		+	for a in *.wav
		+	do
		+	normalize "${a}"
		+	done
		+	</pre>
		+	Another approach is "mix mode". This is suitable for shorter files but they should be similar (e.g. same genre)
		+	<pre>
		+	normalize -m *.wav
		+	</pre>
		+	==== related files ====
		+	Related files are for example songs from one album. This mode retain relative volumes between songs and normalize all songs to maximum.
		+	<pre>
		+	normalize -b *.wav
		+	</pre>
		+
		+	=== Step 3 - create mp3 file ===
		+	Once all *.wav files are prepared it is time to compress them to mp3. I prefer <code>lame</code> mp3 creator. Build in <code>---preset</code>s are allready well configured to fulfill almost all needs. There are 4 possible options:
		+	* medium - there is no much space saved compared to standard but quality is reduced
		+	* '''standard''' - well balanced option. There is lot of noise in car anyway so this level should be good for listening in car.
		+	* extreme - use this if you have really good equipment at home
		+	* insane - best quality regardless of size
		+	''For more details check man page of lame(1)'''
		+	Once I have all files prepared in directory I run:
		+	<pre>
		+	for a in *
		+	do
		+	lame --preset standard "${a}"
		+	done
		+	</pre>
		+
		+	=== Step 4 - burn CD ===
		+	Can your car radio read memory card ? Then your are lucky. Just copy files to card and you are done. All others should use favorite burning program and burn CD-R(W).
		+
		+	Usually I am preparing all files on my media-pc via ssh. Final CD can be burn easily via [http://bashburn.dose.se/ bashburn] from command line.

← Older revision		Revision as of 17:26, 14 March 2014
Line 17:		Line 17:
	</pre>		</pre>
	'' -ac == number of output channels ''		'' -ac == number of output channels ''
		+	==== video with more audio tracks ====
		+	If source file contain more that one audio track (I don't mean channels). Then it is necessary to specify which one will be saved to output file. See man page and option <code>-map</code> (for example: <code>-map 0:a:0</code>) or [http://trac.ffmpeg.org/wiki/AudioChannelManipulation AudioChannelManipulation]. If you are unsure what is content of file then simply run:
		+	<pre>
		+	ffmpeg -i input.mkv
		+	</pre>
		+	It will show technical details and ten quit due to missing output file.
		+
		+	=== Step 2 - normalize tracks ===

@@ Line 12: / Line 12: @@
 </pre>
 '' -i == input file, -vn == no video processing ''
-==== video with DTS audio track (5.1 or all other X.Y combinations)
+==== video with DTS audio track (5.1 or all other X.Y combinations) ====
 <pre>
 ffmpeg -i input.mkv -vn -ac 2 output.wav
 </pre>
 '' -ac == number of output channels ''

← Older revision		Revision as of 17:20, 14 March 2014
Line 4:		Line 4:

	Here are steps how to get sound track from video and store it as mp3. It is possible to do it directly via <code>ffmpeg</code> but I prefer <code>lame</code> mp3 creator. Depending on source I normalize tracks before converting to mp3. This is also recommend only on lossless file formats.		Here are steps how to get sound track from video and store it as mp3. It is possible to do it directly via <code>ffmpeg</code> but I prefer <code>lame</code> mp3 creator. Depending on source I normalize tracks before converting to mp3. This is also recommend only on lossless file formats.
		+
		+	=== Step 1 - extract audio from video file ===
		+	<code>ffmpeg</code> is powerful video converter. With correct option it can "dump" audio or directly create mp3. I am using following way to extract audio:
		+	==== video with stereo audio track ====
		+	<pre>
		+	ffmpeg -i input.mkv -vn output.wav
		+	</pre>
		+	'' -i == input file, -vn == no video processing ''
		+	==== video with DTS audio track (5.1 or all other X.Y combinations)
		+	<pre>
		+	ffmpeg -i input.mkv -vn -ac 2 output.wav
		+	</pre>
		+	'' -ac == number of output channels ''

← Older revision		Revision as of 17:15, 14 March 2014
Line 1:		Line 1:
−	~~..........................~~.	+	Problem: I have video file with concert or music show and I would like to play it in car or on phone.

		+	I both cases it is enough to have audio track and it is necessary to have correct format. My car radio can play only mp3 files (and of course regular cdda).

−	~~=== Step 1 extract audio~~ from video ~~file ===~~	+	Here are steps how to get sound track from video and store it as mp3. It is possible to do it directly via <code>ffmpeg</code> but I prefer <code>lame</code> mp3 creator. Depending on source I normalize tracks before converting to mp3. This is also recommend only on lossless file formats.
−	~~==== video with stereo sound track ====~~
−	<code>ffmpeg</code> ~~is powerful video converter. It can be used to "extract" sound track from video files by using correct options.~~
−	<~~pre~~>
−	~~ffmpeg -i video_file.suffix -vn output.wav~~
−	</~~pre~~>
−	~~'' -i = input, -vn = no video proccessing''~~
−	~~==== video with multi-channel sound track (e~~.~~g 5~~.~~1 or others) ====~~

@@ Line 3: / Line 3: @@
 === Step 1 extract audio from video file ===
 <code>ffmpeg</code> is powerful video converter. It can be used to "extract" sound track from video files by using correct options.
 <pre>
@@ Line 8: / Line 9: @@
 </pre>
 '' -i = input, -vn = no video proccessing''