IPv6-Labor

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====== Super 8 Filmscanner ======

===== Sabulo =====

  * www.sabulo.com
  * https://www.sabulo.com/sb/3d-printing-2/8mm-film-scanner-kotokino-mark-iv/
  * https://www.thingiverse.com/thing:4249811/files

===== Roboscan =====
  * https://www.heise.de/hintergrund/RoboScan-Automatisiert-Filme-scannen-mit-Raspberry-Pi-4997993.html

===== Stuff =====

  * http://www.lightbreeze.co.uk/Film%20Technology.htm#scanner
  * https://www.filmshooting.com/scripts/forum/viewtopic.php?f=1&t=26843
  * https://github.com/etiennecollomb/Super-8-Raspberry-Scan

  * https://www.techstage.de/ratgeber/ratgeber-dias-fotos-und-negative-richtig-digitalisieren/cnbe39w
  * https://www.techstage.de/ratgeber/filmrolle-und-videokassette-richtig-digitalisieren-ab-10-euro/nhdxbk4

===== EOS =====
  * LP-E6 Batterie-Dummy für externe Spannungsversorgung ([[https://www.thingiverse.com/thing:653932|Thingiverse]])
===== ffmpeg =====


==== Fotos zu einem Zeitraffer zusammenfügen mit ffmpeg ====
  * https://emanuelduss.ch/2012/11/fotos-zu-einem-zeitraffer-zusammenfugen-mit-ffmpeg/
  * https://trac.ffmpeg.org/wiki/Slideshow


==== Stabilisiertes Video erzeugen ====

== First pass uses the vidstabdetect filter to generate relative-translation and rotation-transform information ==

<code bash>
ffmpeg -i VID_20180208_142855.mp4 -vf vidstabdetect=stepsize=5:shakiness=8:accuracy=15:result=transform_vectors.trf \
-f null -
</code>

== Second pass uses the generated transform information and encodes the stabilized movie ==

<code bash>
ffmpeg -i input.mp4 -vf vidstabtransform=input=transform_vectors.trf:zoom=2:smoothing=12,unsharp=5:5:0.8:3:3:0.4 \
-c:v libx265  -preset slow -crf 23 -acodec copy smooth_output.mp4
#encodig for dumb H.264 players, audio-codec: aac
ffmpeg -i input.mp4 -vf vidstabtransform=input=transform_vectors.trf:zoom=2:smoothing=12,unsharp=5:5:0.8:3:3:0.4,format=yuv420p \
-c:v libx264 -crf 26 -preset slower -c:a aac -movflags +faststart output.mp4
</code>

**Stacking two videos next to each other**
<code bash>
ffmpeg -i input1.mp4 -i output2.mp4 -filter_complex vstack merged.mp4 #vertical stacking
ffmpeg -i input1.mp4 -i output2.mp4 -filter_complex hstack merged.mp4 #horizontal stacking
</code>


**Split-screen video (left side from first, right side from second video**
<code bash>
ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex "[0:v]crop=iw/2:ih:0:0[left];  [1:v]crop=iw/2:ih:ow:0[right]; \
[left][right]hstack" merged.mp4
</code>


**Rotate videos without re-encoding**

<code bash>
ffmpeg -i input.mp4 -c copy -metadata:s:v:0 rotate=90 output.mp4
</code>

  * [[https://github.com/georgmartius/vid.stab|VidStab Github Page]]
  * https://trac.ffmpeg.org/wiki/Encode/H.264
  * https://trac.ffmpeg.org/wiki/Encode/H.265
  * [[https://stackoverflow.com/questions/35349935/ffmpeg-crop-with-side-by-side-merge|Split Screen Video]]
  * [[https://github.com/donmelton/video_transcoding/issues/160|HEVC output is not playable by QuickTime on macOS ]]
  * [[https://gist.github.com/clayton/6196167|Install FFMPEG on OS X with HomeBrew]]
  * [[https://gist.github.com/maxogden/43219d6dcb9006042849|Video stabilization using VidStab and FFMPEG (Mac OS X)]]
  * https://ipfs-sec.stackexchange.cloudflare-ipfs.com/avp/A/question/19089.html


==== Videogröße reduzieren: H.264 ===

The CRF parameter sets quality and influences file size. Lower values mean higher quality.Typical values range from 18 to 28 [[https://trac.ffmpeg.org/wiki/Encode/H.264|(default is 23)]].

<code bash>
ffmpeg -i input.mov -c:v libx264 -crf 26 -preset slower -c:a aac -vf format=yuv420p -movflags +faststart output.mp4
</code>

Resize to 1080: ''-vf scale=1920:1080'', tune for slideshow: ''-tune stillimage'' (it seems only one -vf filter can be applied).\\
''-t 300'' encodes 5 minutes for quick quality control:

<code bash>
ffmpeg -i input.mov -t 300 -vf scale=1920:1080 -crf 26 -tune stillimage -c:a aac -movflags +faststart output1080.mp4
</code>

 * Web-Optimized: https://superuser.com/questions/1155186/convert-mov-video-to-mp4-with-ffmpeg/1155189

==== whatsapp: video format not supported ====

<code bash>
ffmpeg -i broken.mp4 -c:v libx264 -profile:v baseline -level 3.0 -pix_fmt yuv420p working.mp4
</code>
  * https://stackoverflow.com/questions/39887869/ffmpeg-whatsapp-video-format-not-supported
==== ffmpeg -> swf ====
  * https://stackoverflow.com/questions/20194270/convert-compressed-swf-to-mp4
  * https://stackoverflow.com/questions/39301315/convert-swf-to-mp4/39304403#39304403

==== MP4 video zu MP3 ====

  ffmpeg -i video.mp4 -vn audio.mp3

  * https://superuser.com/questions/332347/how-can-i-convert-mp4-video-to-mp3-audio-with-ffmpeg