Re: [LAU] Making videos with jack and a webcam or something else, band recording.

for me to record a music video I would:

- buy a Canon 550d (t2i) and record at 25p (or 24p -24 progressive frames -
if you are from the states) recording the sound with the camera
- at the same time record sound with a jackd
- use kdenlive to transcode video to dnxhd
- in kdenlive, sync the camera sound with the master from the jackd app
- delete camera sound, and render the final video.

(use a gooooooooood PC if you doin' full HD recordings)

Atentamente, Jorge Salgueiro (Incitec S.L.)
______________________________________
Use GNU/Linux: free culture for a free society

2010/5/9 Niels Mayer <nielsmayer@email-addr-hidden>

> [[resending to list as it bounced the first time due to >30K length]]
>
> Loki Davison <loki.davison@email-addr-hidden>:
>
>> digital camera then try and sync the audio afterwards or what? What
>> video recording apps work with jack?
>
>
> One simple possibility: use whatever you'd use to record and transfer video
> into mp4/etc and then use xjadeo/qjadeo for playback sync'd with an external
> sequencer/daw. (I use the one from PlanetCCRMA:
> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/12/i386/repoview/xjadeo.html
>
>
> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/12/x86_64/repoview/xjadeo.html
> )
>
> Installed Packages
>
> Name : xjadeo
>
> Arch : x86_64
>
> Version : 0.4.7
>
> Release : 1.svn200.fc12.ccrma
>
> Size : 356 k
>
> Repo : installed
>
> From repo : /xjadeo-0.4.7-1.svn200.fc12.ccrma.x86_64
>
> Summary : Very simple video player that gets sync from Jack
>
> URL : http://sourceforge.net/projects/xjadeo
>
> License : GPL
>
> Description: Xjadeo is a very simple video player that gets sync from jack.
>> When
>
> : a sequencer like Muse or Rosegarden acts as a timebase master,
>
> : xjadeo will display the video frame in sync with the sequencer
>
> : transport. This means that you can visually synchronize an
>> audio
>
> : event with a certain frame in the movie, which comes quite
>> handy
>
> : when you want to create a soundtrack for a video clip.
>
>
>> > rpm -ql xjadeo
>
> /usr/bin/qjadeo
>
> /usr/bin/xjadeo
>
> /usr/bin/xjinfo
>
> /usr/bin/xjremote
>
> /usr/share/doc/xjadeo-0.4.7
>
> /usr/share/doc/xjadeo-0.4.7/AUTHORS
>
> /usr/share/doc/xjadeo-0.4.7/COPYING
>
> /usr/share/doc/xjadeo-0.4.7/ChangeLog
>
> /usr/share/doc/xjadeo-0.4.7/NEWS
>
> /usr/share/doc/xjadeo-0.4.7/README
>
> /usr/share/doc/xjadeo-0.4.7/TODO
>
> /usr/share/man/man1/qjadeo.1.gz
>
> /usr/share/man/man1/xjadeo.1.gz
>
> /usr/share/man/man1/xjinfo.1.gz
>
> /usr/share/man/man1/xjremote.1.gz
>
> /usr/share/qjadeo/locale/qjadeo_fr.qm
>
>
> One potential issue w/ xjadeo is that it appears to puke on some HD content
> that ffmpeg-based playback has no problem with. For example when I record
> off digital cable, it fails to recognize or read the files, even though
> ffmpeg says they're "ok" (modulo "Seems stream 0 codec frame rate differs
> from container frame rate: 59.94 (60000/1001) -> 29.97 (30000/1001)" and
> "Seems stream 2 codec frame rate differs from container frame rate: inf
> (1/0) -> -nan (0/0)" :-) ).... Transcoding "off the air" files recorded in,
> e.g. mythtv, fixes the issue:
>
> > xjinfo Videos/India_Music_Voyager_PBS.mpg
>
> Videos/India_Music_Voyager_PBS.mpg: Error while opening file
>
>
> > ffmpeg -i Videos/India_Music_Voyager_PBS.mpg
>
> FFmpeg version SVN-r20372, Copyright (c) 2000-2009 Fabrice Bellard, et al.
>
> built on Nov 7 2009 10:57:27 with gcc 4.4.2 20091027 (Red Hat 4.4.2-7)
>
> ...
>
> Seems stream 0 codec frame rate differs from container frame rate: 59.94
>> (60000/1001) -> 29.97 (30000/1001)
>
> Seems stream 2 codec frame rate differs from container frame rate: inf
>> (1/0) -> -nan (0/0)
>
> Input #0, mpegts, from 'Videos/India_Music_Voyager_PBS.mpg':
>
> Duration: 00:27:50.47, start: 34145.227389, bitrate: 3363 kb/s
>
> Program 1
>
> Stream #0.0[0x940]: Video: mpeg2video, yuv420p, 544x480 [PAR 20:17 DAR
>> 4:3], 15000 kb/s, 29.97 tbr, 90k tbn, 59.94 tbc
>
> Stream #0.1[0x941](eng): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
>
> Stream #0.2[0x9c0]: Video: mpeg2video, 90k tbn
>
> Stream #0.3[0x9c1](spa): Audio: ac3, 0 channels, s16
>
>
> It happily decodes just about everything else, and its 'xjinfo' utility
> gives me some useful XML to boot:
>
> Niels
> http://nielsmayer.com
>
> PS: speaking of extracting structured information from videos && before i
> have to cobble together my own: does anybody know of a lib that extracts
> captions and caption-timing information from videos and outputs some nice
> structured output (e.g. timedtext, SMIL)?? And also the same API should
> transparently allow access to YouTube's Google-voice-based automatic caption
> extractor (
> http://www.digitaltrends.com/computing/software-computing/youtube-opens-automatic-captioning-to-everyone/
> ...
> http://code.google.com/apis/youtube/2.0/developers_guide_protocol_captions.html )
> Even if it's imprecise/hilarious, it's also a giant onset-detection corpora
> for a good portion of the internet's video. :-)
>
>
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>
>

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Received on Sun, 9 May 2010 20:43:19 +0200