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Martin Sourada 08-01-2008 04:16 PM

git screencasts
 
Hi,

I've just recorded another screencast for the echo-icon-theme git
repository how-to's. That makes two versions of the "Setting up the git
repository" screencast (mkv+h264+ass subs and ogv+theora) and one
version of "Adding new icons to git" [1]. As I am still new to this area
I'd appreciate any feedback and suggestions what to do with the files
next and which way is better - mkv+h264 or theora wherever (preferably
in matroska as well) - and whether the subtitle commentary is desired.

I also noticed that the ogv file causes a lot of problems, one being
that rawhide totem complains of missing codecs, but plays it fine,
another that mkvmerge fails to read the file and the same goes for
avidemux. I tried renaming to ogm or ogg, and whereas both ogg and ogm
fixes totem and enable nautilus to generate thumbnail, the other issues
remain unchanged. It seems to me that the file header is incorrect.
Since mplayer can play it, it is probably possible to fix these issues
via mencoder, but I have zero experience with it.

Any suggestions, ideas, advices?

Thanks,
Martin

References:
[1] http://mso.fedorapeople.org/screencasts/

PS: The matroska one was recorded with xvidcap (which however tends to
freeze lately), re-encoded to h264 and put to matroska with avidemux,
subtitles were done in subtitleeditor and merged with the video using
mkvmerge-gui. The other two were recorded with gtk-recordmydesktop, no
editing done. Everything was done in rawhide.
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"Jeffrey Ollie" 08-01-2008 05:00 PM

git screencasts
 
2008/8/1 Martin Sourada <martin.sourada@gmail.com>:
>
> I've just recorded another screencast for the echo-icon-theme git
> repository how-to's. That makes two versions of the "Setting up the git
> repository" screencast (mkv+h264+ass subs and ogv+theora) and one
> version of "Adding new icons to git" [1]. As I am still new to this area
> I'd appreciate any feedback and suggestions what to do with the files
> next and which way is better - mkv+h264 or theora wherever (preferably
> in matroska as well) - and whether the subtitle commentary is desired.

Ogg/Vorbis/Theora is preferred. Most other formats have patent
problems. I like the subtitles - they will be easier to translate
than audio commentary. I'm not sure how you get subtitles into
Ogg/Theora though.

> I also noticed that the ogv file causes a lot of problems, one being
> that rawhide totem complains of missing codecs, but plays it fine,
> another that mkvmerge fails to read the file and the same goes for
> avidemux. I tried renaming to ogm or ogg, and whereas both ogg and ogm
> fixes totem and enable nautilus to generate thumbnail, the other issues
> remain unchanged. It seems to me that the file header is incorrect.
> Since mplayer can play it, it is probably possible to fix these issues
> via mencoder, but I have zero experience with it.

Record My Desktop seems to be adding a "skeleton" track to the Ogg file

http://wiki.xiph.org/index.php/Ogg_Skeleton

mplayer doesn't know what do do with a track of that type either but
at least it doesn't throw up a annoying dialog.

Jeff

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Martin Sourada 08-01-2008 06:45 PM

git screencasts
 
On Fri, 2008-08-01 at 12:00 -0500, Jeffrey Ollie wrote:
> Ogg/Vorbis/Theora is preferred. Most other formats have patent
> problems. I like the subtitles - they will be easier to translate
> than audio commentary. I'm not sure how you get subtitles into
> Ogg/Theora though.
>
Basically matroska [1] is IMHO another good option (it's in fedora
repos, is open both as in beer and bird, is not patent encumbered and
can contain literally anything) for the container (instead of
ogg/ogm/ogv) and we can add subtitles to it pretty easy (mkvmerge
usually does good job in that).

Martin

References:
[1] http://www.matroska.org/
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Gian Paolo Mureddu 08-01-2008 09:41 PM

git screencasts
 
Martin Sourada escribió:

Hi,

I've just recorded another screencast for the echo-icon-theme git
repository how-to's. That makes two versions of the "Setting up the git
repository" screencast (mkv+h264+ass subs and ogv+theora) and one
version of "Adding new icons to git" [1]. As I am still new to this area
I'd appreciate any feedback and suggestions what to do with the files
next and which way is better - mkv+h264 or theora wherever (preferably
in matroska as well) - and whether the subtitle commentary is desired.

I also noticed that the ogv file causes a lot of problems, one being
that rawhide totem complains of missing codecs, but plays it fine,
another that mkvmerge fails to read the file and the same goes for
avidemux. I tried renaming to ogm or ogg, and whereas both ogg and ogm
fixes totem and enable nautilus to generate thumbnail, the other issues
remain unchanged. It seems to me that the file header is incorrect.
Since mplayer can play it, it is probably possible to fix these issues
via mencoder, but I have zero experience with it.

Any suggestions, ideas, advices?

Thanks,
Martin

References:
[1] http://mso.fedorapeople.org/screencasts/

PS: The matroska one was recorded with xvidcap (which however tends to
freeze lately), re-encoded to h264 and put to matroska with avidemux,
subtitles were done in subtitleeditor and merged with the video using
mkvmerge-gui. The other two were recorded with gtk-recordmydesktop, no
editing done. Everything was done in rawhide.



So the Matroska is encoded into h264 or theora encapsulated into the mkv
(would that even be possible to do?)


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Martin Sourada 08-01-2008 09:51 PM

git screencasts
 
On Fri, 2008-08-01 at 16:41 -0500, Gian Paolo Mureddu wrote:
> Martin Sourada escribió:
> So the Matroska is encoded into h264 or theora encapsulated into the mkv
> (would that even be possible to do?)

It's h264 in Matroska, but AFAIK it's possible to use Theora in
Matroska.

Martin
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"Jeffrey Ollie" 08-02-2008 01:02 AM

git screencasts
 
2008/8/1 Martin Sourada <martin.sourada@gmail.com>:
> On Fri, 2008-08-01 at 12:00 -0500, Jeffrey Ollie wrote:
>> Ogg/Vorbis/Theora is preferred. Most other formats have patent
>> problems. I like the subtitles - they will be easier to translate
>> than audio commentary. I'm not sure how you get subtitles into
>> Ogg/Theora though.
>>
> Basically matroska [1] is IMHO another good option (it's in fedora
> repos, is open both as in beer and bird, is not patent encumbered and
> can contain literally anything) for the container (instead of
> ogg/ogm/ogv) and we can add subtitles to it pretty easy (mkvmerge
> usually does good job in that).

I think that the native Ogg/Theora/Vorbis support coming in FireFox
gives us a lot of incentive to not use anything else.

Jeff

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Martin Sourada 08-02-2008 07:15 AM

git screencasts
 
On Fri, 2008-08-01 at 20:02 -0500, Jeffrey Ollie wrote:
> 2008/8/1 Martin Sourada <martin.sourada@gmail.com>:
> I think that the native Ogg/Theora/Vorbis support coming in FireFox
> gives us a lot of incentive to not use anything else.
>
IMHO that's a bad step. I applaud them for supporting Theora, Vorbis and
Ogg but they should support as many *open* formats/containers as
possible. Especially given that mkv is much more robust for videos than
Ogg and has wide support through many HW/SW platforms. IIRC WebKit-gtk
handles <video> and <audio> tags via gstreamer and should be thus able
to play pretty anything (in brand new Fedora installation limited to
anything FLOSS). However the <video> tag support is experimental and
disabled by default (in Fedora WebKit package it's disabled as well).

> Jeff
>
Martin

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