Encoding from command line - Revision history

Porcelinux: /* Filters */

2024-08-07T23:44:33Z

Filters

← Older revision		Revision as of 23:44, 7 August 2024
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	=== Filters ===		=== Filters ===

	* to add filters to ffmpeg or mencoder, use the option '''-vf'''		* to add filters to ffmpeg or mencoder command, use the option '''-vf'''

			==== Remap ====

			\|https://trac.ffmpeg.org/wiki/RemapFilter RemapFilter] "remaps the pixels to a new x,y destination based on two files ymap/xmap"

			for quad fisheye to equirectangular, 190° lens

			ffmpeg -i source.mp4 -vf v360=dfisheye:e:ih_fov=190:iv_fov=190:yaw=0 -y output_file


	==== Scale ====		==== Scale ====

2012-06-02T17:31:27Z

Images...

← Older revision		Revision as of 17:31, 2 June 2012
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	ffmpeg -loop_input -vframes <number_of_frames> -i <input_image> <output_video>		ffmpeg -loop_input -vframes <number_of_frames> -i <input_image> <output_video>


			ffmpeg -i INPUT.jpg -an -vcodec libx264 -coder 1 -flags +loop -cmp +chroma -subq 10 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -flags2 +dct8x8 -trellis 2 -partitions +parti8x8+parti4x4 -crf 24 -threads 0 -r 25 -g 25 -y OUTPUT.mp4

	=== Network ===		=== Network ===

2012-06-02T17:18:14Z

WebM

← Older revision		Revision as of 17:18, 2 June 2012
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	ffmpeg -pass 1 -passlogfile pr7.webm -qmin 5 -qmax 51 -i master/879.m2t -vcodec libvpx -b:v 104800 -s 320x200 -an -f webm -y NUL		ffmpeg -pass 1 -passlogfile pr7.webm -qmin 5 -qmax 51 -i master/879.m2t -vcodec libvpx -b:v 104800 -s 320x200 -an -f webm -y NUL
	ffmpeg -pass 2 -passlogfile pr7.webm -qmin 5 -qmax 51 -i master/879.m2t -vcodec libvpx -b:v 104800 -s 320x200 -acodec libvorbis -ac 1 -b:a 64k -y video/pr7.webm		ffmpeg -pass 2 -passlogfile pr7.webm -qmin 5 -qmax 51 -i master/879.m2t -vcodec libvpx -b:v 104800 -s 320x200 -acodec libvorbis -ac 1 -b:a 64k -y video/pr7.webm

			ffmpeg -i master/743.MTS -s 360x240 -vpre libvpx-360p -pass 1 -passlogfile log743_7.webm -qmin 5 -qmax 51 -b:v 500k -an -f webm -y video/743_7.webm
			ffmpeg -i master/743.MTS -s 360x240 -vpre libvpx-360p -pass 1 -passlogfile log743_7.webm -qmin 5 -qmax 51 -b:v 500k -acodec libvorbis -ac 1 -b:a 96k -f webm -y video/743_7.webm

	=== Theora ===		=== Theora ===

2012-06-02T16:18:26Z

WebM

← Older revision		Revision as of 16:18, 2 June 2012
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	ffmpeg -i input.mp4 -s 1280x720 -vpre libvpx-720p -b 3900k -pass 1 -an -f webm -y output.webm		ffmpeg -i input.mp4 -s 1280x720 -vpre libvpx-720p -b 3900k -pass 1 -an -f webm -y output.webm
	ffmpeg -i input.mp4 -s 1280x720 -vpre libvpx-720p -b 3900k -pass 2 -acodec libvorbis -ab 128k -f webm -y output.webm		ffmpeg -i input.mp4 -s 1280x720 -vpre libvpx-720p -b 3900k -pass 2 -acodec libvorbis -ab 128k -f webm -y output.webm


			ffmpeg -pass 1 -passlogfile pr7.webm -qmin 5 -qmax 51 -i master/879.m2t -vcodec libvpx -b:v 104800 -s 320x200 -an -f webm -y NUL
			ffmpeg -pass 2 -passlogfile pr7.webm -qmin 5 -qmax 51 -i master/879.m2t -vcodec libvpx -b:v 104800 -s 320x200 -acodec libvorbis -ac 1 -b:a 64k -y video/pr7.webm

	=== Theora ===		=== Theora ===

2012-05-21T16:17:47Z

Troubleshooting

← Older revision		Revision as of 16:17, 21 May 2012
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	libc.so.6 => /lib/libc.so.6 (0x00575000)		libc.so.6 => /lib/libc.so.6 (0x00575000)
	/lib/ld-linux.so.2 (0x00557000)		/lib/ld-linux.so.2 (0x00557000)

			find /usr/local/lib/ \| grep -E "libavdevice.so.52\|libavfilter.so.1\|libavcodec.so.52\|libavcore.so.0"

			lddconfig

	== FFmpeg Math expresisons ==		== FFmpeg Math expresisons ==

2012-05-21T16:17:15Z

FFmpeg Math expresisons

@@ Line 415: / Line 415: @@
 ** '''-maxrate''' 1400K
 ** '''-bufsize''' 120K
 == FFmpeg Math expresisons ==

2012-05-21T16:16:30Z

Theora

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 ----
 === Theora ===
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 *Encode from a tuner (specify a format with -vf format):
   mencoder -tv driver=v4l:width=640:height=480 tv:// -o tv.avi -ovc rawnuv
 === MPEG2 M2S MPEGII ===

2012-01-20T02:12:18Z

Guardo la webcam con mplayer

← Older revision		Revision as of 02:12, 20 January 2012
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	==== Guardo la webcam con mplayer ====		==== Guardo la webcam con mplayer ====
			* '''v4l2'''
			mplayer -cache 128 -tv driver=v4l2:width=800:height=480:outfmt=i420:device=/dev/video0 -vo xv tv://
			* '''v4l'''
	mplayer tv:// -tv driver=v4l:width=640:height=480:outfmt=rgb24:device=/dev/video0:noaudio -flip		mplayer tv:// -tv driver=v4l:width=640:height=480:outfmt=rgb24:device=/dev/video0:noaudio -flip

	==== recording webcam (old Video4Linux 1) with mencoder...====		==== recording webcam (old Video4Linux 1) with mencoder...====
	* good quality		* good quality

2011-07-27T13:41:05Z

bit rate

← Older revision		Revision as of 13:41, 27 July 2011
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	== bit rate ==		== bit rate ==
			* values can be specified using '''''1'''M''''' or ''1024'''K''''' or '''''1 048 576'''''
	* ~~'''-b'''~~ '''''1'''M''''' ''1024'''K''''' ''1 048 576''		** '''-b''' ''1024'''K'''''
	* '''-minrate''' 800K		** '''-minrate''' 800K
	* '''-maxrate''' 1400K		** '''-maxrate''' 1400K
	* '''-bufsize''' 120K		** '''-bufsize''' 120K

	== FFmpeg Math expresisons ==		== FFmpeg Math expresisons ==

2011-07-27T13:39:44Z

FFmpeg Math expresisons