Manual video encoding - Revision history

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2013-05-03T07:08:13Z

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46.161.41.27: Undo revision 10109 by pelago (Talk)

2013-05-02T23:57:11Z

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mrsellout: Undo revision 51411 by 46.161.41.27 (Talk)(Undo vandalism)

2013-04-26T13:11:55Z

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46.161.41.27: Undo revision 10109 by pelago (Talk)

2013-04-25T17:32:46Z

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lameventanas at 09:41, 9 July 2012

2012-07-09T09:41:55Z

← Older revision		Revision as of 09:41, 9 July 2012
Line 56:		Line 56:

	===ffmpeg 0.7.0===		===ffmpeg 0.7.0===
-	~~Newer versions of~~ ffmpeg require different parameters to produce a Baseline 3.0 video file that the N900 will play.	+	ffmpeg 0.7.0 require different parameters to produce a Baseline 3.0 video file that the N900 will play.
	ffmpeg -threads 0 -i input.mkv -vcodec libx264 -s 852x480 -b 1200k -ac 2 -ab 160k -flags +loop+mv4 -cmp 256 -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -me_method umh -subq 7 -refs 5 -me_range 16 -g 250 -qmin 10 -qmax 51 -vpre baseline -f mp4 output.mp4		ffmpeg -threads 0 -i input.mkv -vcodec libx264 -s 852x480 -b 1200k -ac 2 -ab 160k -flags +loop+mv4 -cmp 256 -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -me_method umh -subq 7 -refs 5 -me_range 16 -g 250 -qmin 10 -qmax 51 -vpre baseline -f mp4 output.mp4
		+
		+	===ffmpeg 0.10.3===
		+	ffmpeg 0.10.3 requires different parameters. The previous command should be written as:
		+	ffmpeg -threads 0 -i input.mkv -vcodec libx264 -s 852x480 -b:v 1200k -ac 2 -b:a 160k -flags +loop+mv4 -cmp 256 -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -me_method umh -subq 7 -refs 5 -me_range 16 -g 250 -qmin 10 -qmax 51 -vprofile baseline -f mp4 output.mp4

	== transcode ==		== transcode ==

mooninite: /* ffmpeg */

2011-09-05T08:04:47Z

ffmpeg

← Older revision		Revision as of 08:04, 5 September 2011
Line 54:		Line 54:

	ffmpeg -i input.avi -threads 0 -vcodec libx264 -acodec libfaac -vpre hq -vpre baseline -ab 128k -b 600k output.mp4		ffmpeg -i input.avi -threads 0 -vcodec libx264 -acodec libfaac -vpre hq -vpre baseline -ab 128k -b 600k output.mp4
		+
		+	===ffmpeg 0.7.0===
		+	Newer versions of ffmpeg require different parameters to produce a Baseline 3.0 video file that the N900 will play.
		+	ffmpeg -threads 0 -i input.mkv -vcodec libx264 -s 852x480 -b 1200k -ac 2 -ab 160k -flags +loop+mv4 -cmp 256 -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -me_method umh -subq 7 -refs 5 -me_range 16 -g 250 -qmin 10 -qmax 51 -vpre baseline -f mp4 output.mp4

	== transcode ==		== transcode ==

84.227.249.235: /* ffmpeg */

2010-05-01T15:36:28Z

ffmpeg

← Older revision		Revision as of 15:36, 1 May 2010
Line 50:		Line 50:
	ffmpeg -i infile -vcodec mpeg4 -acodec mp3 -vtag DIVX -s 176:144 -b 200 -pass 1 outfile.avi		ffmpeg -i infile -vcodec mpeg4 -acodec mp3 -vtag DIVX -s 176:144 -b 200 -pass 1 outfile.avi
	ffmpeg -i infile -vcodec mpeg4 -acodec mp3 -vtag DIVX -s 176:144 -b 200 -pass 2 outfile.avi		ffmpeg -i infile -vcodec mpeg4 -acodec mp3 -vtag DIVX -s 176:144 -b 200 -pass 2 outfile.avi
		+
		+	The N900 supports AAC and H.264 up to Baseline 3.0 profile. This produces quite good quality, but takes a while to encode:
		+
		+	ffmpeg -i input.avi -threads 0 -vcodec libx264 -acodec libfaac -vpre hq -vpre baseline -ab 128k -b 600k output.mp4

	== transcode ==		== transcode ==

ossi1967: /* H.264 (with mencoder) */ add N900 info

2010-02-19T21:42:58Z

H.264 (with mencoder): add N900 info

← Older revision		Revision as of 21:42, 19 February 2010
Line 127:		Line 127:
	== H.264 (with mencoder) ==		== H.264 (with mencoder) ==

-	OS2008 ~~plays~~ H.264 videos out of the box - in theory. A lot of existing H.264-material will not play well ~~on N8x0-devices~~. [http://talk.maemo.org/showthread.php?t=13514&page=4 This thread] on talk.maemo.org indicates that a video file must adhere to the Baseline Profile, level 1.2, of the H.264-standard to be compatible with both the ~~OS2008~~ Media Player and MPlayer. (See Wikipedia for a detailed information on [http://en.wikipedia.org/wiki/H.264#Profiles profiles] and [http://en.wikipedia.org/wiki/H.264#Levels levels].)	+	Both OS2008 (N800/N810) and Maemo 5 (N900) play H.264 videos out of the box - in theory. A lot of existing H.264-material will not play well, though. [http://talk.maemo.org/showthread.php?t=13514&page=4 This thread] on talk.maemo.org indicates that a video file must adhere to the Baseline Profile, level 1.2, of the H.264-standard to be compatible with both the Maemo Media Player and MPlayer. (See Wikipedia for a detailed information on [http://en.wikipedia.org/wiki/H.264#Profiles profiles] and [http://en.wikipedia.org/wiki/H.264#Levels levels].)
		+
		+	The N900 has the same restrictions. [https://bugs.maemo.org/show_bug.cgi?id=6635 This bug report] tells us that with Maemo 5, H.264-videos still must be Baseline.

	With mencoder, the following settings are known to work. (Simplified; you may use 2-pass etc.) They are originally taken and adapted from a website about H.264 on the N95 and given here only as an example for those who want to experiment with manual settings.		With mencoder, the following settings are known to work. (Simplified; you may use 2-pass etc.) They are originally taken and adapted from a website about H.264 on the N95 and given here only as an example for those who want to experiment with manual settings.

ossipena at 12:30, 1 November 2009

2009-11-01T12:30:48Z

← Older revision		Revision as of 12:30, 1 November 2009
Line 181:		Line 181:
	[[Category:Users]]		[[Category:Users]]
	[[Category:Media]]		[[Category:Media]]
		+	[[Category:Power users]]

93.17.75.7: Undo revision 18136 by 67.228.80.194 (Talk)

2009-09-14T10:34:29Z

Undo revision 18136 by 67.228.80.194 (Talk)

← Older revision		Revision as of 10:34, 14 September 2009
Line 2:		Line 2:
	For automatic video conversion tools, see the [[video encoding]] article.		For automatic video conversion tools, see the [[video encoding]] article.

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		+
		+	One tool you can use to encode video is mencoder that comes with mplayer on Linux. Always start with the cleanest video you can, and make sure it has good A/V sync before you start by watching it on a PC. Make sure the original has a frame rate greater than or equal to the one you are trying to generate.
		+
		+	The recommended way to run mencoder is through tablet-encoder. You can however try running mencoder directly and playing with the options. Be careful about forcing the output frame rate, however. I didn't get any good result with the below commands. Instead, I got A/V desync and bad effects due do frame rate changes, so I now use some variation of the above shell scripts.
		+
		+	mencoder infile.avi -oac mp3lame -ovc lavc \
		+	-lavcopts vcodec=mpeg4 -vf scale=352:208 -ffourcc DIVX \
		+	-ofps 15 -o outfile.avi
		+
		+	This will generate a 15fps 352x208 avi file.
		+
		+	The following mencoder command line will make smaller videos:
		+
		+	mencoder infile.avi -oac mp3lame -ovc lavc \
		+	-lavcopts vcodec=mpeg4:mbd=1:vbitrate=300 -vf scale=352:208 \
		+	-ffourcc DIVX -ofps 15 -o outfile.avi
		+
		+	mplayer will play 30 fps video fine. The following command produces acceptable video with no A/V sync issues.
		+
		+	mencoder infile.avi -oac mp3lame -ovc lavc \
		+	-lavcopts vcodec=mpeg4:mbd=1:vbitrate=300 -vf scale=352:208 \
		+	-ffourcc DIVX -o outfile.avi
		+
		+	The above command was tested on 30 fps source file and creates 30 fps video that plays back fine on the N810.
		+
		+	To make even smaller, you can drop down the quality of audio to 64 kbit/s (for 300 kbit video stream, converting audio to 64 kbit versus 128 kbit yields a total save of approx 20%. Notice that for lower bitrate movies percentage is considerably higher):
		+
		+	mencoder infile.avi -oac mp3lame -lameopts abr:br=64 -ovc lavc \
		+	-lavcopts vcodec=mpeg4:mbd=1:vbitrate=300 -vf scale=352:208 \
		+	-ffourcc DIVX -ofps 15 -o outfile.avi
		+
		+	The differences are the block detection method (mbd=1) and a capped bitrate.
		+
		+	See man mencoder for more options.

	== ffmpeg ==		== ffmpeg ==