Nuage

Ceci est une ancienne révision du document !

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h1. FFMPEG usage

toc

h2. useful links

https://www.ffmpeg.org/ffmpeg-devices.html#decklink

http://ffmpeg.org/releases/ffmpeg-3.3.3.tar.bz2

https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

h2. Configuration d'ubuntu

<pre> sudo apt-get -y install autoconf automake build-essential libass-dev libfreetype6-dev \

libsdl2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev \
libxcb-xfixes0-dev pkg-config texinfo wget zlib1g-dev x264 libx264-dev

</pre>

<pre> sudo apt-get install yasm </pre>

h2. Compilation

<pre> PATH=“$HOME/bin:$PATH” PKG_CONFIG_PATH=“$HOME/ffmpeg_build/lib/pkgconfig” ./configure \

1. -prefix=“$HOME/ffmpeg_build” \
2. -pkg-config-flags=“–static” \
3. -extra-cflags=“-I$HOME/ffmpeg_build/include” \
4. -extra-ldflags=“-L$HOME/ffmpeg_build/lib” \
5. -bindir=“$HOME/bin” \
6. -enable-gpl \
7. -enable-libass \
8. -enable-libfdk-aac \
9. -enable-libfreetype \
10. -enable-libmp3lame \
11. -enable-libopus \
12. -enable-libtheora \
13. -enable-libvorbis \
14. -enable-libvpx \
15. -enable-libx264 \
16. -enable-nonfree \
17. -enable-decklink \
18. -extra-cflags=-I/home/damien/Blackmagic_DeckLink_SDK_10.9.5/Linux/include

make -j 8 sudo make install

</pre>

h2. Usage

h3. List output devices

  ffmpeg -i test.avi -f decklink -list_devices 1 dummy

h3. List supported formats:

  ffmpeg -i test.avi -f decklink -list_formats 1 'DeckLink Mini Monitor'

h3. Play video clip:

  ffmpeg -i test.avi -f decklink -pix_fmt uyvy422 'DeckLink Mini Monitor'

h3. Play video clip with non-standard framerate or video size:

  ffmpeg -i test.avi -f decklink -pix_fmt uyvy422 -s 720x486 -r 24000/1001 'DeckLink Mini Monitor'

h3. List output devices

ffmpeg -f decklink -list_devices 1 dummy -i big_buck_bunny_1080p_stereo.avi

h3. List supported formats

ffmpeg -f decklink -list_formats 1 'DeckLink Quad (1)' -i big_buck_bunny_1080p_stereo.avi

h3. Play video clip

ffmpeg -f decklink  -pix_fmt uyvy422 'DeckLink Quad (1)' -i big_buck_bunny_1080p_stereo.avi

mplayer capture.raw -demuxer rawvideo -rawvideo fps=29.97:w=1920:h=1080:uyvy

h3. List input devices:

ffmpeg -f decklink -list_devices 1 -i dummy

h3. List supported formats:

ffmpeg -f decklink -list_formats 1 -i 'Intensity Pro'

h3. Capture video clip at 1080i50:

ffmpeg -format_code Hi50 -f decklink -i 'Intensity Pro' -acodec copy -vcodec copy output.avi

h3. Capture video clip at 1080i50 10 bit:

ffmpeg -bm_v210 1 -format_code Hi50 -f decklink -i 'UltraStudio Mini Recorder' -acodec copy -vcodec copy output.avi

h3. Capture video clip at 1080i50 with 16 audio channels:

ffmpeg -channels 16 -format_code Hi50 -f decklink -i 'UltraStudio Mini Recorder' -acodec copy -vcodec copy output.avi

ffmpeg -format_code Hp29 -f decklink -i 'DeckLink Quad (8)' -vcodec copy output.avi
ffmpeg -format_code Hp29 -f decklink -i 'DeckLink Quad (8)' -vcodec h264 output.avi

h3. Compression h.264

ffmpeg -i video_720p-16Mbps.mp4 -c:v libx264 -preset fast -crf 10 -profile:v high -level 4.0 video_opengl_scaled_720p_compressé_2.mp4

The option -crf gives the quality of the resulting video. The lowest, the better the quality is. The options are documented in the ffmpeg site.

h3. Crop and pad filters

ffmpeg -i video_720p-16Mbps.mp4 -vf "crop=1024:720 [cropout]; [cropout] pad=1024:768:0:24" -c:v libx264 -preset fast -crf 10 -profile:v high -level 4.0 video_opengl_scaled_720p_compressé_2.mp4

h3. display terratec G1 (USB composite capture). Display the captured input in a window

ffmpeg -input_format rgb565 -i /dev/video0 -f opengl "window title"

h3. Display blackmagic input on a opengl window

ffmpeg -format_code hp50 -f decklink -i 'DeckLink Quad (1)' -vcodec rawvideo -pix_fmt rgba -f sdl "window"

h3. Test frames generation

ffmpeg -f lavfi -i testsrc2=duration=100:size=1280x720:rate=60 -c:v libx264 -preset fast -crf 0 -level 4.0 test2_720p60.mp4

with white box in the first second

ffmpeg -f decklink  -pix_fmt uyvy422 'DeckLink Quad (1)' -i test.mp4

ffmpeg -format_code Hp29 -f decklink -i 'DeckLink Quad (8)' -vcodec h264 output.avi
~/bin/ffplay output.avi

ffmpeg -f lavfi -i testsrc2=duration=10:size=1280x720:rate=60000/1000 -vf "drawbox=enable='between(n,0,60)':x=iw/10:y=8*ih/10:w=iw/10:h=ih/10:color=white:t=50" -c:v libx264 -preset fast -crf 0 -level 4.0 test2_720p60.mp4

ffmpeg -f lavfi -i testsrc2=duration=10:size=1280x720:rate=50000/1000 -vf "drawbox=enable='between(n,0,50)':x=iw/10:y=8*ih/10:w=iw/10:h=ih/10:color=white:t=iw/10" -c:v libx264 -preset fast -crf 0 -level 4.0 test2_720p50.mp4

ffmpeg -f lavfi -i testsrc2=duration=10:size=1920x1080:rate=25000/1000 -vf "drawbox=enable='between(n,0,25)':x=iw/10:y=8*ih/10:w=iw/10:h=ih/10:color=white:t=iw/10" -c:v libx264 -preset fast -crf 0 -level 4.0 test2_1080p25.mp4

ffmpeg -f lavfi -i testsrc2=duration=10:size=1920x1080:rate=30000/1000 -vf "drawbox=enable='between(n,0,30)':x=iw/10:y=8*ih/10:w=iw/10:h=ih/10:color=white:t=iw/10" -c:v libx264 -preset fast -crf 0 -level 4.0 test2_1080p30.mp4

ffmpeg -f lavfi -i testsrc2=duration=10:size=720x576:rate=25000/1000 -vf "drawbox=enable='between(n,0,25)':x=iw/10:y=8*ih/10:w=iw/10:h=ih/10:color=white:t=iw/10" -c:v libx264 -preset fast -crf 0 -level 4.0 test2_pal.mp4

ffmpeg -f lavfi -i testsrc2=duration=10:size=720x486:rate=30000/1001 -vf "drawbox=enable='between(n,0,30)':x=iw/10:y=8*ih/10:w=iw/10:h=ih/10:color=white:t=iw/10" -c:v libx264 -preset fast -crf 0 -level 4.0 test2_ntsc.mp4

frei0r filers

ffmpeg -f lavfi -i frei0r_src=size=1920x1080:framerate=30:filter_name=partik0l:filter_params=1234 -c:v libx264 -preset fast -crf 0 -level 4.0 test3_1080p30.mp4

overlay of the filer on an input

ffmpeg -f lavfi -i testsrc2=duration=10:size=1920x1080:rate=30 -vf "frei0r_src=size=1920x1080:framerate=10:filter_name=partik0l:filter_params=1234 [overlay]; [in][overlay] overlay" -c:v libx264 -preset fast -crf 0 -level 4.0 test5_1080p30.mp4

h3. Other examples

<pre> stream = ffmpeg.input('DeckLink Quad (8)') stream = ffmpeg.output(stream, 'dummy.mp4') ffmpeg.run(stream, format='decklink', format_code='Hp29', vcodec='h264') ffmpeg.run(stream, format='decklink', format_code='Hp29', vcodec='h264') </pre>

ffmpeg -i test.mp4 -filter_complex "loop=2:2500" -vcodec h264 output.avi

---

use -ss 1 to avoid the recording of the Colored Mire at the beginning <pre> ffmpeg -format_code 24ps -ss 1 -f decklink -i 'DeckLink Quad (8)' -vcodec h264 -y output.avi ffplay output.avi

[decklink @ 0x3f08560] Supported formats for 'DeckLink Quad (8)':

      format_code     description
      ntsc            720x486 at 30000/1001 fps (interlaced, lower field first)
      pal             720x576 at 25000/1000 fps (interlaced, upper field first)
      23ps            1920x1080 at 24000/1001 fps
      24ps            1920x1080 at 24000/1000 fps
      Hp25            1920x1080 at 25000/1000 fps
      Hp29            1920x1080 at 30000/1001 fps
      Hp30            1920x1080 at 30000/1000 fps
      Hi50            1920x1080 at 25000/1000 fps (interlaced, upper field first)
      Hi59            1920x1080 at 30000/1001 fps (interlaced, upper field first)
      Hi60            1920x1080 at 30000/1000 fps (interlaced, upper field first)
      Hp50            1920x1080 at 50000/1000 fps
      Hp59            1920x1080 at 60000/1001 fps
      Hp60            1920x1080 at 60000/1000 fps
      hp50            1280x720 at 50000/1000 fps
      hp59            1280x720 at 60000/1001 fps
      hp60            1280x720 at 60000/1000 fps

</pre>

<pre> stream = ffmpeg.input('DeckLink Quad (8)') stream = ffmpeg.output(stream, 'dummy.mp4') ffmpeg.run(stream, format='decklink', format_code='Hp29', vcodec='h264') ffmpeg.run(stream, format='decklink', format_code='Hp29', vcodec='h264') </pre>

ffmpeg -i test.mp4 -filter_complex "loop=2:2500" -vcodec h264 output.avi

<pre> # play sequence in loop # (ffmpeg.input('test.mp4').filter_('loop', “-1”, “125”) # .output('DeckLink Quad (1)', pix_fmt='uyvy422', format='decklink') # .run() # ) </pre>

ffmpeg -f dekclink -pix_fmt uyvy422 'DeckLink Quad (1)' -i /bigdata/damien/video_samples/testsrc_rawvideo_uyvy422_1920x1080_30.0_5_markup_box.avi -filter_complex "loop=-1:3000"

adds black frames at the beginning

<pre> in_file = ffmpeg.input('test.mp4') marker = ffmpeg.input('color=c=black:s=1920×1080:r=24:d=1', format='lavfi') ffmpeg.concat(

      marker.trim(start_frame=0, end_frame=10),
      in_file
  ).output('test_marker.mp4', vcodec='h264').run()

</pre>

ffmpeg -f decklink -pix_fmt uyvy422 'DeckLink Quad (1)' -i /bigdata/damien/video_samples/testsrc_rawvideo_uyvy422_1920x1080_30.0_5_markup_box.avi

play in loop a video sample - max nframes is 32767

ffmpeg -f decklink  -pix_fmt uyvy422 'DeckLink Quad (1)' -i /bigdata/damien/video_samples/testsrc_rawvideo_uyvy422_1920x1080_30.0_5_markup_box.avi -filter_complex "loop=-1:3000"

record that sample in row format

ffmpeg -format_code Hp30 -ss 1 -f decklink -i 'DeckLink Quad (8)' -vcodec copy decklink_testsrc_rawvideo_uyvy422_1920x1080_30.0_5_markup_box.avi