ffmpeg examples

001.sh

#/bin/bash
# resize and crop
# ffmpeg: 1440x1072 -> 1452x1080 -> 1440x1080 rockchip h264_rkmpp

ffmpeg-rockchip -i input.mp4 -b:v 2472k -vcodec h264_rkmpp -s 1452x1080 -r 30 -g 60 -b:a 160k -ar 44100 -threads 4 tmp.mp4
ffmpeg-rockchip -i tmp.mp4 -b:v 2472k -vcodec h264_rkmpp -s 1440x1080 -r 30 -g 60 -filter:v \"crop=1440:1080:6:0\" -aspect 4:3 -acodec copy -threads 4 output.mp4

002.sh

#/bin/bash
# ffmpeg: encode using nvidia gpu nvenc 

ffmpeg \
-i input.mkv \ # input
- map 0:1 # choose video track
- map 0:6 # choose audio track
-vcodec  h264_nvenc \ # encode driver
-b:v 8192k \ # video bit rate
-r 30 \ # fps
-acodec copy \ # audio codec
-map_metadata -1 \ # remove metadata
-map_chapters -1 \ # remove chapters
-threads 4 \ # use 4 cores
output.mp4

003.sh

#!/bin/bash

# audio originala hartu
ffmpeg -i 1.mp4 -vn a.m4v

# youtube-tik jeitsi
youtube-dl https://www.youtube.com/watch?v=vmGPIIHxWqY

# zatia hartu
ffmpeg -i Huevazo\ al\ alcalde\ de\ Vitoria-Gasteiz-vmGPIIHxWqY.mp4 -ss 00:00:48.000 -t 00:00:03.000 2.mp4

# bideoa 480x480 bihurtu, 640x480 zan, beraz (640-480)/ 2 = 80, x-a 80tik hasiko da eta y 0-tik
ffmpeg -i 2.mp4 -filter:v "crop=480:480:80:0" -c:a copy 22.mp4
mv 22.mp4 2.mp4

# 1.mp4-eko metadatuekin 2.mp4 enkodeatu eta 22.mp4 sortu
ffmpeg -i 1.mp4 -i 2.mp4 -map 1 -c copy -map_metadata 0 -map_metadata:s:v 0:s:v -map_metadata:s:a 0:s:a 22.mp4
mv 22.mp4 2.mp4

# mpeg2-ra pasatu
ffmpeg -i 1.mp4 -qscale 0 1.mpg
ffmpeg -i 2.mp4 -qscale 0 2.mpg

# audioa kendu
ffmpeg -i 1.mpg -an 01.mpg
ffmpeg -i 2.mpg -an 02.mpg

# konkatenatu eta mp4-ra enkodeatu
cat 01.mpg 02.mpg | ffmpeg -f mpeg -i - 3.mp4

# audioa sartu
ffmpeg -i 3.mp4 -i a.m4a output.mp4

004.sh

#!/bin/bash
# video to gif

ffmpeg -i input.mp4 -vf fps=10,scale=320:-1:flags=lanczos,palettegen palette.png
ffmpeg -i input.mp4 -i palette.png -filter_complex "fps=10,scale=320:-1:flags=lanczos[x];[x][1:v]paletteuse" output.gif

005.sh

#!/bin/bash
# ffmpeg: increase brightness 
ffmpeg -i input.mp4 -vf eq=brightness=0.08 -c:a copy output.mp4

006.sh

#!/bin/bash
# ffmpeg: mix audio 
ffmpeg -y -i input01.mp3 -i input02.mp3 -filter_complex "[0:a][1:a] amix=inputs=2:duration=longest[a]" -map "[a]" output.mp3

007.sh

# concat videos

$ cat a.txt
file '001.mp4'
file '002.mp4'
file '003.mp4'

$ ffmpeg -f concat -safe 0 -i a.txt a.mp4

008.sh

#!/bin/bash
# ffmpeg: record desktop + pulseaudio 

ffmpeg -f pulse -ac 2 -i 0 -f x11grab -s 1280x800 -i :0.0 sample.mpg

009.sh

#!/bin/bash
# gif to video
ffmpeg -i animated.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" video.mp4

010.sh

#!/bin/bash
# bash: ffmpeg "image + audio to video" mobile compatible 
ffmpeg -loop 1 -i logo.png -i audio.mp3 -pix_fmt yuv420p -shortest output.mp4

011.sh

#!/bin/bash
# ffmpeg: add black border to video 
# original video 480x196 -> to 16:9 480x270 -> 270-196 = 74 -> 74 / 2 = 37
# add 74 pixels, 37 from top and 37 from bottom

ffmpeg -i input.avi -pix_fmt yuv420p -filter_complex "[0]pad=h=74+ih:y=37:color=black" output.mp4

012.sh

#!/bin/bash
# ffmpeg: convert vertival video into horizontal adding black 
ffmpeg -i input.mp4 -vf "scale=1920:-2:flags=lanczos, scale=480:848, pad=1920:1080:(ow-iw)/2:(oh-ih)/2:black" output.mp4

013.sh

#!/bin/bash
# bash: ffmpeg batch conversion 
# ./convert.sh /home/zital/Music

INPUT_DIR=$1
INPUT_EXTENSION=mp2
OUTPUT_EXTENSION=mp3

EXTRA=" -vn -ab 256k -ar 48000 -ac 2 "

FILES=`find "$INPUT_DIR" | grep $INPUT_EXTENSION`

SAVEIFS=$IFS
IFS=$(echo -en "\n\b")

for FILE in ${FILES[@]}
do
	C="ffmpeg -i \""$FILE"\" $EXTRA \""$FILE".$OUTPUT_EXTENSION"\"
	eval $C
done
IFS=$SAVEIFS

014.sh

#!/bin/bash
# ffmpeg: ac3 5.1 -> stereo 
ffmpeg -i input.avi -ac 2 -af "pan=stereo|FL=FC+0.30*FL+0.30*BL|FR=FC+0.30*FR+0.30*BR" output.mp4

015.sh

#!/bin/bash
# ffmpeg: create video from image and audio 
ffmpeg -i audio.opus -f image2 -loop 1 -i logo.png -s 640x360 -r 30 -shortest output.mp4

016.sh

#!/bin/bash
# amd gpu bategaz ffmpeg erabiltzeko:
ffmpeg -vaapi_device /dev/dri/renderD128 -i input.mp4 -vf 'format=nv12,hwupload' -c:v hevc_vaapi output.mp4
ffmpeg -vaapi_device /dev/dri/renderD128 -i input.mp4 -vf 'format=nv12,hwupload' -c:v h264_vaapi output.mp4
# lehenengue ariñau duest

017.sh

#!/bin/bash
# mp3 streaming bateri irudidxe sartun eta geure streaming-en sartun

ffmpeg -loop 1 -i logo.png -i "https://stream.mediasector.es/radio/8230/bizkaiairratia.mp3" -c:v h264_nvenc -c:a aac -rtbufsize 100M -f flv "rtmp://live.zital.eus:1935/live/1A79a4d60de6718e838932748972389478329"

018.sh

#!/bin/bash
# 576p-ri marko baltzak sartun bideue 16:9 bihurtuteko

ffmpeg -i input.mp4 -vf "pad=iw+304:ih:152:0" -vcodec h264_nvenc -s 1024x576 -r 30 -b:v 2500k -acodec copy output.mp4

019.sh

#!/bin/bash
# 1024x576-tik 1080p-ra pasateko

ffmpeg -i input.mp4 -vcodec h264_nvenc -vf "scale=1920:1080" -r 30 -b:v 4500k -acodec copy output.mp4

020.sh

#!/bin/bash
# vhs zatidxe hartun
ffmpeg -i input.mp4 -b:v 2500k -r 30 -s 720x576 -filter:v "crop=720:576:0:0" -codec h264_nvenc -ss 00:00:07 -t 00:57:00 -acodec aac -b:a 160k -ac 2 -ar 48000 -pix_fmt yuv420p output.mp4

021.sh

#!/bin/bash
# bizkaia irratian seinalie hartun eta entzun
URL="https://stream.mediasector.es/radio/8230/bizkaiairratia.mp3"
#ffmpeg -i "${URL}" -c:a libmp3lame -b:a 128k -ac 2 -f mp3 - | ffplay -
ffmpeg -i "${URL}" -c copy -buffer_size 512k -fifo_size 1000000 -f mp3 - | ffplay -

022.md

record mic using pulseaudio device

pulseaudio devices:

pactl list short sources

result:

61	alsa_output.platform-snd_aloop.0.analog-stereo.monitor	PipeWire	s32le 2ch 48000Hz	SUSPENDED
404	alsa_output.usb-C-Media_Electronics_Inc._USB_Audio_Device-00.analog-stereo.monitor	PipeWire	s16le 2ch 48000Hz	SUSPENDED
405	alsa_input.usb-C-Media_Electronics_Inc._USB_Audio_Device-00.mono-fallback	PipeWire	s16le 1ch 48000Hz	SUSPENDED
737	bluez_input.F8:DF:15:C7:1C:3D	PipeWire	float32le 1ch 48000Hz	SUSPENDED
773	bluez_output.F8_DF_15_C7_1C_3D.1.monitor	PipeWire	s16le 2ch 48000Hz	RUNNING

record mic with ffmpeg:

ffmpeg -f pulse -i alsa_input.usb-C-Media_Electronics_Inc._USB_Audio_Device-00.mono-fallback -ac 1 recording.m4a

023.md

mix 2 mic input in 1 output

!#/bin/bash

# arecord -l
#**** List of CAPTURE Hardware Devices ****
#card 0: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
#  Subdevices: 8/8
#  Subdevice #0: subdevice #0
#  Subdevice #1: subdevice #1
#  Subdevice #2: subdevice #2
#  Subdevice #3: subdevice #3
#  Subdevice #4: subdevice #4
#  Subdevice #5: subdevice #5
#  Subdevice #6: subdevice #6
#  Subdevice #7: subdevice #7
#card 0: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
#  Subdevices: 8/8
#  Subdevice #0: subdevice #0
#  Subdevice #1: subdevice #1
#  Subdevice #2: subdevice #2
#  Subdevice #3: subdevice #3
#  Subdevice #4: subdevice #4
#  Subdevice #5: subdevice #5
#  Subdevice #6: subdevice #6
#  Subdevice #7: subdevice #7
#card 2: Generic [HD-Audio Generic], device 0: ALCS1200A Analog [ALCS1200A Analog]
#  Subdevices: 1/1
#  Subdevice #0: subdevice #0
#card 2: Generic [HD-Audio Generic], device 2: ALCS1200A Alt Analog [ALCS1200A Alt Analog]
#  Subdevices: 1/1
#  Subdevice #0: subdevice #0
#card 3: Device [USB Audio Device], device 0: USB Audio [USB Audio]
#  Subdevices: 1/1
#  Subdevice #0: subdevice #0
#card 4: Device_1 [USB Audio Device], device 0: USB Audio [USB Audio]
#  Subdevices: 1/1
#  Subdevice #0: subdevice #0

ffmpeg -f alsa -channels 1 -i hw:3,0 -f alsa -channels 1 -i hw:4,0 -filter_complex "[0:a][1:a]amix=inputs=2:duration=longest:dropout_transition=2" -acodec pcm_s16le -ar 44100 -ac 2 mixed_output.wav

024.sh

# vhs: obs-n vhs-tik 1080p-ra pasatzeko prozesua

# bideo zatia hartu
ffmpeg -i 01.mp4 -b:v 2500k -r 30 -s 720x576 -filter:v "crop=720:576:0:0" -codec h264_nvenc -acodec aac -b:a 160k -ac 2 -ar 48000 -pix_fmt yuv420p 001.mp4
mv 001.mp4 01.mp4

# aldeetan beltza sartu 16:9 sortzeko
ffmpeg -i 01.mp4 -vf "pad=iw+304:ih:152:0" -vcodec h264_nvenc -s 1024x576 -r 30 -b:v 2500k -acodec copy 001.mp4
mv 001.mp4 01.mp4

# 1080p-ra pasatu
ffmpeg -i 01.mp4 -vcodec h264_nvenc -vf "scale=1920:1080" -r 30 -b:v 4500k -acodec copy 001.mp4
rm -rf 01.mp4