Videos/A Digital Media Primer For Geeks/making - Revision history

Gmaxwell: moved A Digital Media Primer For Geeks/Episode 01/making to Videos/A Digital Media Primer For Geeks/making

2013-02-26T00:17:31Z

moved A Digital Media Primer For Geeks/Episode 01/making to Videos/A Digital Media Primer For Geeks/making

← Older revision		Revision as of 00:17, 26 February 2013
(No difference)

Xiphmont: Bah. Wiki formatting is Grr.

2013-02-23T19:58:19Z

Bah. Wiki formatting is Grr.

← Older revision		Revision as of 19:58, 23 February 2013
Line 68:		Line 68:

	(For the record, scaling with mplayer below is done mostly for convenience. It should not be used for professional as the libswscale resampler used in mplayer tends to shift the colors in the result.)		(For the record, scaling with mplayer below is done mostly for convenience. It should not be used for professional as the libswscale resampler used in mplayer tends to shift the colors in the result.)
	~~<br>~~

	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">
Line 93:		Line 92:

	As a result, I've updated the examples below to use the current tool names and options, as well as use ffmpeg to perform WebM muxing rather than mkvtoolnix.		As a result, I've updated the examples below to use the current tool names and options, as well as use ffmpeg to perform WebM muxing rather than mkvtoolnix.
	~~<br>~~

	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">

Xiphmont: /* Encoding */

2013-02-23T19:57:51Z

Encoding

← Older revision		Revision as of 19:57, 23 February 2013
Line 68:		Line 68:

	(For the record, scaling with mplayer below is done mostly for convenience. It should not be used for professional as the libswscale resampler used in mplayer tends to shift the colors in the result.)		(For the record, scaling with mplayer below is done mostly for convenience. It should not be used for professional as the libswscale resampler used in mplayer tends to shift the colors in the result.)
			<br>

	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">
Line 92:		Line 93:

	As a result, I've updated the examples below to use the current tool names and options, as well as use ffmpeg to perform WebM muxing rather than mkvtoolnix.		As a result, I've updated the examples below to use the current tool names and options, as well as use ffmpeg to perform WebM muxing rather than mkvtoolnix.
			<br>

	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">

Xiphmont: Warn about mplayer scaling color shifts

2013-02-23T19:57:08Z

Warn about mplayer scaling color shifts

← Older revision		Revision as of 19:57, 23 February 2013
Line 66:		Line 66:

	I encoded by hand external to Cinelerra using mplayer for final postprocessing, the example_encoder included with the [Ptalarbvorm] Theora source distribution, and ivfenc for WebM. I synced subtitles to the video by hand with Audacity (I already had the script) in SRT format [for easy editing/translation and syncing with the video in HTML5], and transcoded to Ogg Kate using kateenc. The Kate subs were then muxed with the Ogg video encoding using oggz-merge, and finally indexing added to the Ogg with OggIndex.		I encoded by hand external to Cinelerra using mplayer for final postprocessing, the example_encoder included with the [Ptalarbvorm] Theora source distribution, and ivfenc for WebM. I synced subtitles to the video by hand with Audacity (I already had the script) in SRT format [for easy editing/translation and syncing with the video in HTML5], and transcoded to Ogg Kate using kateenc. The Kate subs were then muxed with the Ogg video encoding using oggz-merge, and finally indexing added to the Ogg with OggIndex.

			(For the record, scaling with mplayer below is done mostly for convenience. It should not be used for professional as the libswscale resampler used in mplayer tends to shift the colors in the result.)

	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">

Xiphmont: /* Encoding */

2013-02-23T19:54:25Z

Encoding

← Older revision		Revision as of 19:54, 23 February 2013
Line 87:		Line 87:
	'''Important Update as of 2013-02-23'''		'''Important Update as of 2013-02-23'''

	A few things ~~in the tools~~ have changed slightly ~~witht he~~ WebM tools since ~~episodeI~~ was first ~~encoded, and it~~ also turns out that mkvmerge/clean don't generate strictly correct WebM files. The mkvmerge problem can cause playback in Chromium to freeze due to out-of-order timestamps. There's more information here: [http://code.google.com/p/chromium/issues/detail?id=155981]		A few things have changed slightly with the WebM tools since episode-I was first released. It also turns out that mkvmerge/clean don't generate strictly correct WebM files. The mkvmerge/clean problem can cause playback in Chromium to freeze due to out-of-order timestamps. There's more information here: [http://code.google.com/p/chromium/issues/detail?id=155981]

	As a result, I've updated the examples below to use the current tool names and options, as well as use ffmpeg to perform WebM muxing rather than mkvtoolnix.		As a result, I've updated the examples below to use the current tool names and options, as well as use ffmpeg to perform WebM muxing rather than mkvtoolnix.

Xiphmont: Update the encoding parameter suggestions to work properly as of 20130223

2013-02-23T19:53:24Z

Update the encoding parameter suggestions to work properly as of 20130223

← Older revision		Revision as of 19:53, 23 February 2013
Line 84:		Line 84:

	<br style="clear:both;"/>		<br style="clear:both;"/>

			'''Important Update as of 2013-02-23'''

			A few things in the tools have changed slightly witht he WebM tools since episodeI was first encoded, and it also turns out that mkvmerge/clean don't generate strictly correct WebM files. The mkvmerge problem can cause playback in Chromium to freeze due to out-of-order timestamps. There's more information here: [http://code.google.com/p/chromium/issues/detail?id=155981]

			As a result, I've updated the examples below to use the current tool names and options, as well as use ffmpeg to perform WebM muxing rather than mkvtoolnix.

	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">
Line 92:		Line 98:
	oggz-rip -c vorbis A_Digital_Media_Primer_For_Geeks-360p.ogv -o vorbis.ogg		oggz-rip -c vorbis A_Digital_Media_Primer_For_Geeks-360p.ogv -o vorbis.ogg
	* Produce VP8 encoding from the y4m file used for Theora		* Produce VP8 encoding from the y4m file used for Theora
	~~ivfenc filtered.y4m vp8.ivf~~ -p 2 -t 4 --best --target-bitrate=1500 --end-usage=0 --auto-alt-ref=1 -v --minsection-pct=5 --maxsection-pct=800 --~~lagin~~-frames=16 --kf-min-dist=0 --kf-max-dist=120 --static-thresh=0 --drop-frame=0 --min-q=0 --max-q=60		vpxenc -p 2 -t 4 --best --target-bitrate=1500 --end-usage=0 --auto-alt-ref=1 -v --minsection-pct=5 --maxsection-pct=800 --lag-in-frames=16 --kf-min-dist=0 --kf-max-dist=120 --static-thresh=0 --drop-frame=0 --min-q=0 --max-q=60 -o vp8.webm filtered.y4m
	* Mux the audio and video into ~~our first-stage~~ WebM file		* Mux the audio and video into the final WebM file
	~~mkvmerge~~ vorbis.ogg vp8.~~ivf~~ -~~o first~~-~~stage.webm~~		ffmpeg -i vorbis.ogg -i vp8.webm -c:v copy -c:a copy A_Digital_Media_Primer_For_Geeks-360p.webm
	* mkvmerge by itself doesn't generate a ~~fully-compliant WebM file; mkclean will make the last necessary alterations~~
	~~mkclean --remux first-stage.webm~~ A_Digital_Media_Primer_For_Geeks-360p.webm
	</div></center>		</div></center>

Lee Carré: moved A Digital Media Primer For Geeks (episode 1)/making to A Digital Media Primer For Geeks/Episode 01/making: Establishing a hierarchical structure, especially in anticipation of future episodes. This allows for meta pages, such as giving ...

2011-09-16T21:57:22Z

moved A Digital Media Primer For Geeks (episode 1)/making to A Digital Media Primer For Geeks/Episode 01/making: Establishing a hierarchical structure, especially in anticipation of future episodes. This allows for meta pages, such as giving ...

← Older revision		Revision as of 21:57, 16 September 2011
(No difference)

Edrz: /* Control pop/unpop */

2010-09-30T23:20:08Z

Control pop/unpop

← Older revision		Revision as of 23:20, 30 September 2010
Line 137:		Line 137:
	===Control pop/unpop===		===Control pop/unpop===

	Oddly enough this is was the hardest part, not because it's hard to do, but it's hard to make it consistent across browsers. Every browser fires radically different UI events for the same mouse/keyboard actions.		Oddly enough this was the hardest part, not because it's hard to do, but it's hard to make it consistent across browsers. Every browser fires radically different UI events for the same mouse/keyboard actions.

	===Dimming===		===Dimming===

	...In retrospect, not as gratuitous as it seemed when I first wrote it. Many aspects about how video is made and presented assume viewing in a relatively dim environment, where the video being watched is the brightest thing in sight [or close to it]. Xiph's web styling uses white backgrounds, which I found actively distracting and out of place, but altering the style of the site for just the video pages also seemed clearly wrong. So I added an animated dim/undim on playback/pause (instantaneous dim/undim was jarring). I'm now convinced it was a good call, assuming it actually works everywhere as intended (it won't work on browsers using the Cortado fallback).		...In retrospect, not as gratuitous as it seemed when I first wrote it. Many aspects about how video is made and presented assume viewing in a relatively dim environment, where the video being watched is the brightest thing in sight [or close to it]. Xiph's web styling uses white backgrounds, which I found actively distracting and out of place, but altering the style of the site for just the video pages also seemed clearly wrong. So I added an animated dim/undim on playback/pause (instantaneous dim/undim was jarring). I'm now convinced it was a good call, assuming it actually works everywhere as intended (it won't work on browsers using the Cortado fallback).

Edrz: /* Encoding */

2010-09-30T23:08:59Z

Encoding

← Older revision		Revision as of 23:08, 30 September 2010
Line 65:		Line 65:
	===Encoding===		===Encoding===

	I encoded by hand external to Cinelerra using mplayer for final postprocessing, the example_encoder included with the [Ptalarbvorm] Theora source distribution, and ivfenc for WebM. I synced subtitles to the video by hand with Audacity (I already had the script) in SRT format [for easy editing/translation and syncing ~~witht he~~ video in HTML5], and transcoded to Ogg Kate using kateenc. The Kate subs were then muxed with the Ogg video encoding using oggz-merge, and finally indexing added to the Ogg with OggIndex.		I encoded by hand external to Cinelerra using mplayer for final postprocessing, the example_encoder included with the [Ptalarbvorm] Theora source distribution, and ivfenc for WebM. I synced subtitles to the video by hand with Audacity (I already had the script) in SRT format [for easy editing/translation and syncing with the video in HTML5], and transcoded to Ogg Kate using kateenc. The Kate subs were then muxed with the Ogg video encoding using oggz-merge, and finally indexing added to the Ogg with OggIndex.

	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">

Xiphmont: /* Encoding */

2010-09-26T12:47:58Z

Encoding

← Older revision		Revision as of 12:47, 26 September 2010
Line 96:		Line 96:
	mkvmerge vorbis.ogg vp8.ivf -o first-stage.webm		mkvmerge vorbis.ogg vp8.ivf -o first-stage.webm
	* mkvmerge by itself doesn't generate a fully-compliant WebM file; mkclean will make the last necessary alterations		* mkvmerge by itself doesn't generate a fully-compliant WebM file; mkclean will make the last necessary alterations
	mkclean --remux ~~fisrt~~-stage.webm A_Digital_Media_Primer_For_Geeks-360p.webm		mkclean --remux first-stage.webm A_Digital_Media_Primer_For_Geeks-360p.webm
	</div></center>		</div></center>