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Update HowtoVideoCodecs.md

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should be md compliant
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d-j-a-y
2017-06-03 15:45:12 +02:00
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veejay-current/veejay-server/doc/HowtoVideoCodecs.md
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@@ -1,7 +1,5 @@
## Video files ## Video files
### A video file consists out of TWO seperate elements
A video file consists out of TWO seperate elements:
* container * container
* codec * codec
@@ -9,29 +7,25 @@ The container holds the digitally encoded data and the codec is capable of decod
Veejay supports the AVI and the Quicktime container, with the following codecs: Veejay supports the AVI and the Quicktime container, with the following codecs:
Quicktime: ### Quicktime
* mpjeg,mjpa,jpeg,dmb1,mpng,png * mpjeg,mjpa,jpeg,dmb1,mpng,png
* dvsd, dv, dvcp, dvhd * dvsd, dv, dvcp, dvhd
AVI ### AVI
* mjpeg, mjpa,jpeg,jfif,dmb1,mpng,png * mjpeg, mjpa,jpeg,jfif,dmb1,mpng,png
* dvsd, dv, dvcp, dvhd * dvsd, dv, dvcp, dvhd
* i420, i422, yv16, hfyu * i420, i422, yv16, hfyu
Raw DV ### Raw DV
* PAL / NTSC dvsd * PAL / NTSC dvsd
Veejay can only deal with video files that consists entirely out of whole images (only I-frames). Veejay **can only deal** with video files that consists entirely out of whole images, **only I-frames**.
Which codec to use ## Which codec to use
MotionJPEG (mjpeg) is the veejay codec of choice for most applications, it gives you a good tradeof between compression, quality and compatibility. If you want speed, use AVI yv16 or i420 while recording to new samples. MotionJPEG (mjpeg) is the veejay codec of choice for most applications, it gives you a good tradeof between compression, quality and compatibility. If you want speed, use AVI yv16 or i420 while recording to new samples.
Tools that support MJPEG: ### Tools that support MJPEG:
* http://cvs.cinelerra.org/Cinelerra * http://cvs.cinelerra.org/Cinelerra
* http://www.kinodv.org/Kino * http://www.kinodv.org/Kino
* http://ronald.bitfreak.net/lvs/Linux video studio * http://ronald.bitfreak.net/lvs/Linux video studio
@@ -39,10 +33,8 @@ Tools that support MJPEG:
* http://www.mplayerhq.huMplayer, and mencoder * http://www.mplayerhq.huMplayer, and mencoder
* http://lives.sf.net Lives * http://lives.sf.net Lives
Wich resolutions to use ## Wich resolutions to use
Veejay can do: Veejay can do:
* high definition * high definition
* pal: 720x576 * pal: 720x576
* ntsc: 720x480 * ntsc: 720x480
@@ -51,32 +43,27 @@ Veejay can do:
If you load multiple video files on the commandline, make sure that all files have the same resolution and audio properties. If you load multiple video files on the commandline, make sure that all files have the same resolution and audio properties.
How to convert ## How to convert
### You can use FFMpeg
You can use FFMpeg: ̀`$ ffmpeg -i input-file -vcodec mjpeg -pix_fmt yuvj422p -q:v 0 output-file.avi`
$ ffmpeg -i input-file -vcodec mjpeg -pix_fmt yuvj422p -q:v 0 output-file.avi
Optionally add PCM 16bit audio, 44.1/48.0 Khz, 2 channels, 8 bits per channel Optionally add PCM 16bit audio, 44.1/48.0 Khz, 2 channels, 8 bits per channel
ffmpeg -i input-file -vcodec mjpeg -s 128x128 -pix_fmt yuvj422p -acodec pcm_s16le -ar 44100 -ac 2 output-file.avi `$ ffmpeg -i input-file -vcodec mjpeg -s 128x128 -pix_fmt yuvj422p -acodec pcm_s16le -ar 44100 -ac 2 output-file.avi`
Or, you can use mplayer: ### Or, you can use mplayer
`$ mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -o <outputfile> <inputfile>`
$ mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -o <outputfile> <inputfile> ### To scale on the fly, use
`$ mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -vf scale=352:288 -o <outputfile> <inputfile>`
To scale on the fly, use:
$ mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -vf scale=352:288 -o <outputfile> <inputfile>
consult mplayer documentation about other options, such as cropping and filtering out blocks in video. consult mplayer documentation about other options, such as cropping and filtering out blocks in video.
a quick hint for bulk encoding a bunch of capture.dv files: ### a quick hint for bulk encoding a bunch of capture.dv files
`$ for i in `ls *dv`;do mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -o `echo $i | sed s/.dv/.avi/` $i; done;`
$ for i in `ls *dv`;do mencoder -ovc lavc -oac pcm -lavcopts vcodec=mjpeg -o `echo $i | sed s/.dv/.avi/` $i; done;
What is this dummy mode ¶
## What is this dummy mode
Dummy mode opens up a 'color stream' to start veejay without a video file. Dummy mode opens up a 'color stream' to start veejay without a video file.
If you use a video file, veejay will take that file's properties as default settings for the whole session. If you use a video file, veejay will take that file's properties as default settings for the whole session.