====== ffmpeg ======

ffmpeg installieren:
  * Windows: https://www.gyan.dev/ffmpeg/builds/
  * Linux: sudo apt-get install ffmpeg
  * macOS: brew install ffmpeg 

Chris Video Anleitung: https://www.youtube.com/watch?v=t973zd4s6R4&t=284s

===== Yuneec Thermal Videos aufteilen =====

Um die Videos der Drohne mit 2 Video Spuren aufzuteilen kann folgender Befehl helfen:

Thermalvideo exportieren:
<code>
ffmpeg -i "YUN_0210.mp4" -y -vcodec libx264  -movflags faststart -map 0:v:1 -pix_fmt yuv420p "YUN_0210-thermal.mp4"
</code>

Normalvideo exportieren:
<code>
ffmpeg -i "YUN_0210.mp4" -y -vcodec libx264  -movflags faststart -map 0:v:0 -pix_fmt yuv420p "YUN_0210-normal.mp4"
</code>

Als Script: https://github.com/Wlanfr3ak/mixed-scripts/blob/master/yuneec-ffmpeg.sh

Windoof: https://github.com/Wlanfr3ak/mixed-scripts/blob/master/yuneec-ffmpeg.bat

Quelle: https://emamonline.smartertrack.com/kb/a153/extract-specific-video-and-audio-tracks-using-ffmpeg.aspx

===== AXIS Video umwandeln =====

<code>ffmpeg -i 20220626_225001_20220626_232959.mkv -codec copy test.mp4</code>

===== BluRay ISO to mp4 etc. =====

<code>https://unixsheikh.com/tutorials/remuxing-iso-dvd-or-bluray-using-cat-and-ffmpeg-on-linux.html</code>

===== AV1 Encoding =====

<code>ffmpeg -i input.mp4 -c:v libaom-av1 -crf 30 -c:s copy -c:a copy output.mp4</code>

===== CUDA / NVIDIA Beschleunigung =====
https://docs.nvidia.com/video-technologies/video-codec-sdk/ffmpeg-with-nvidia-gpu/
<code>-hwaccel cuda -hwaccel_output_format cuda</code>

===== H265 =====
[[https://ntown.at/de/knowledgebase/cuda-gpu-accelerated-h264-h265-hevc-video-encoding-with-ffmpeg/]]
<code>ffmpeg.exe -hwaccel cuvid -i inmovie.mov -pix_fmt p010le -c:v hevc_nvenc -preset slow -rc vbr_hq -b:v 6M -maxrate:v 10M -c:a aac -b:a 240k outmovie.mp4</code>
[[https://trac.ffmpeg.org/wiki/Encode/H.265]]
[[https://github.com/Wlanfr3ak/mixed-scripts]]


  * https://superuser.com/questions/329349/how-do-i-convert-iso-to-mp4-without-mounting-with-ffmpeg <code>HandBrakeCLI -Z "High Profile" -i a_movie.iso -o a_movie.mp4</code>
  * <code>HandBrakeCLI -Z "H.265 MF 1080p" -i GENESIS\ INVISIBLE\ TOUCH\(1\).ISO -o Genesis-InvisibleTouch.mp4</code>
  * <code>HandBrakeCLI -Z "Super HQ 1080p30 Surround"  -audio-lang-list "eng" -i GENESIS\ INVISIBLE\ TOUCH\(1\).ISO -o Genesis-InvisibleTouch.mp4</code>
  * <code>ffmpeg -ss 00:00:30.0 -i GENESIS\ INVISIBLE\ TOUCH.mkv -c copy -t 00:07:10.0 Genesis-InvisibleTouchCutted.mp4</code>
  * https://mediaarea.net/en/MediaInfo
  * https://pcundvideo.de/videoqualitat-verbessern/?cn-reloaded=1
  * https://qastack.com.de/superuser/138331/using-ffmpeg-to-cut-up-video


  * https://superuser.com/questions/1671831/parallel-transcoding-with-ffmpeg-on-m1-mac/1671915
  * ffmpeg -i input4kvid.mp4 -vf scale=1920:1080 -c:a copy output1080vid.mp4 Convert 4k to 1080 (no change in codec)
  * ffmpeg -i input.mp4 -c:v libx265 -vtag hvc1 -c:a copy output.mp4 Convert h.264 to h.265 (no change in resolution)
  * ffmpeg -i input.mkv -c:v hevc_videotoolbox -vtag hvc1 -c:a copy output.mp4 MacOS HWaccel
  * ffmpeg -i input.mp4 -c:v libx265 -vtag hvc1 -vf scale=1920:1080 -crf 20 -c:a copy output.mp4 Convert 4k(h.264) to 1080(h.265) Downscaling + Change in compression codec

Film zu 1080p konvertieren:
ffmpeg -i .mkv -c:v libx265 -vtag hvc1 -vf scale=1920:1080 -crf 20 -c:a copy .mp4

<code>
Options Explained
-i input file name or file path

-c:v libx265 -vtag hvc1 selecting compression. Default is libx264

-vf scale=1920:1080 specifying output resolution

-c:a copy copy audio as it is without any compression

-preset slow ask compression algorithm to take more time & look for more areas for compression. Default is medium. Other options are faster, fast, medium, slow, slower

-crf 20 Compression quality

-crf 0 high-quality, low compression, large file

-crf 23 default

-crf 51 low-quality, high compression, small file
</code>

==== Export Bilder from Video ====
<code>ffmpeg -i IMG_4483.MOV -vf fps=1/0.3 -s 2160x3840 "imageX_%05d.jpg"</code> Hochkant
<code>ffmpeg -i MVI_6816.MP4 -vf fps=1/0.3 -s 3840x2160 "imageX_%05d.jpg"</code> Querformat IM VIDEO!!!


==== Bilder nachträglich drehen ====
<code>for file in *.JPG; do convert $file -rotate 90 rotated-$file; done</code>
<code>for file in *.JPG; do convert $file -rotate 180 rotated-$file; done</code>
<code>for file in *.JPG; do convert $file -rotate 270 rotated-$file; done</code>