ffmpeg filter command_ffmpeg drawtxt enable-优快云博客

fmpeg -i vod1.flv -i vod2.flv -filter_complex "[00]scale=720x480[main_video]; [10]scale=700x450[in_picture];[main_video][in_picture]overlay=10:10" out05231943.flv

vod2 over vod1 with postion 10,10

http://corpus.hubwiz.com/2/node.js/19154807.html

Merging two video streams and saving as one file

I'm writing chat application with video call using webRTC. I have two MediaStreams, remote and local and want to merge and save them as one file. So when opening a file, i shall see large video frame (remote stream) and little video frame at top right (local stream). Now I can record these two streams separately using RecordRTC. How can i merge them with nodejs? (no code because I don't know how it's done)

node.js
video-streaming
webrtc

You can use FFmpeg with -filter_complex, here is a working and tested example using FFmpeg version N-62162-gec8789a:

ffmpeg -i main_video.mp4 -i in_picture.mp4 -filter_complex "[00]scale=640x480[main_video]; [10]scale=240x180[in_picture];[main_video][in_picture]overlay=390:10" output.mp4

So, this command tells FFmpeg to read from two input files, main_video.mp4 and in_picture.mp4, then it send some information to the-filter_complex flag...

The -filter_complex flag takes the [00] (first input, first video track) and scale this video to be 640x480px and it identifies the video as [main_video], then, takes the [10] (second input, video track 0) and resize the video to 240x180px naming the video[in_picture], then it merges both videos making an overlay of the second one at x=390 y=10.

Then it saves the output to output.mp4

It is that what you want?

UPDATE: I forgot to add, all you need in node is a module to run FFmpeg, there are plenty of those: https://nodejsmodules.org/tags/ffmpeg

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ffmpeg cut video with time

ffmpeg -ss 00:00:00 -t 00:00:20 -i vod.flv -vcodec copy -acodec copy vod20s.flv

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1/4 every video, use first audio

ffmpeg -i vod1.flv -i vod2.flv -i vod3.flv -i vod4.flv -filter_complex "[0:v]pad=iw*2:ih*2[a];[a][1:v]overlay=w[b];[b][2:v]overlay=0:h[c];[c][3:v]overlay=w:h" out0080.flv

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ok:mux multi font

ffmpeg -i src.mp4 -vf "drawtext=fontfile=/usr/share/fonts/truetype/droid/DroidSansMono.ttf : fontcolor=white : text='Suker-10-10' : x=10: y=10, drawtext=fontfile=/usr/share/fonts/truetype/droid/DroidSansMono.ttf : fontcolor=white : text='Suker10-100' : x=10: y=100, drawtext=fontfile=/usr/share/fonts/truetype/droid/DroidSansMono.ttf : fontcolor=white : text='Suker10-200' : x=10: y=200" -an -y outfont.mp4

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ffplay -f rawvideo -video_size 1920x1080 input.yuv

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mux two video

ffmpeg -i 01.mp4 -i mvp.mp4 -filter_complex "[0:v]format=rgb24,setsar=sar=1/1[mv];[1:v]format=rgb24,setsar=sar=1/1[in];[in][mv]blend=all_mode='addition':all_opacity=1,format=rgb24" -strict -2 output.mp4

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ffmpeg -i out0102.mp4 -i nicepass.mp4 -filter_complex "[0:v]scale=640x360,format=rgb24,setsar=sar=1/1[mv];[1:v]scale=640x360,format=rgb24,setsar=sar=1/1[in];[in][mv]blend=all_mode='addition':all_opacity=1,format=rgb24" -strict -2 output-2116-nicepass.mp4

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Create a file mylist.txt with all the files you want to have concatenated in the following form (lines starting with a # are ignored):

# this is a comment
file '/path/to/file1'
file '/path/to/file2'
file '/path/to/file3'

ffmpeg -f concat -i mylist.txt -c copy output

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wiki:

How to speed up

/

slow down a video

Speeding up/slowing down video

You can change the speed of a video stream using the setpts video filter. Note that in the following examples, the audio stream is not changed, so it should ideally be disabled with -an.

To double the speed of the video, you can use:

ffmpeg -i input.mkv -filter:v "setpts=0.5*PTS" output.mkv

The filter works by changing the presentation timestamp (PTS) of each video frame. For example, if there are two succesive frames shown at timestamps 1 and 2, and you want to speed up the video, those timestamps need to become 0.5 and 1, respectively. Thus, we have to multiply them by 0.5.

Note that this method will drop frames to achieve the desired speed. You can avoid dropped frames by specifying a higher output frame rate than the input. For example, to go from an input of 4 FPS to one that is sped up to 4x that (16 FPS):

ffmpeg -i input.mkv -r 16 -filter:v "setpts=0.25*PTS" output.mkv

To slow down your video, you have to use a multiplier greater than 1:

ffmpeg -i input.mkv -filter:v "setpts=2.0*PTS" output.mkv

Speeding up/slowing down audio

You can speed up or slow down audio with the atempo audio filter. To double the speed of audio:

ffmpeg -i input.mkv -filter:a "atempo=2.0" -vn output.mkv

The atempo filter is limited to using values between 0.5 and 2.0 (so it can slow it down to no less than half the original speed, and speed up to no more than double the input). If you need to, you can get around this limitation by stringing multiple atempo filters together. The following with quadruple the audio speed:

ffmpeg -i input.mkv -filter:a "atempo=2.0,atempo=2.0" -vn output.mkv

Using a complex filtergraph, you can speed up video and audio at the same time:

ffmpeg -i input.mkv -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mkv

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//替换音频

./ffmpeg -i 720p.mp4 -c:v copy -an -y outTemp.mp4

./ffmpeg -i outTemp.mp4 -i ./music1.acc -y outMusic.mp4

//添加字幕,随机显示

./ffmpeg -y -i 720p.mp4 -acodec copy -ac 2 -vcodec libx264 -refs 2 -x264opts keyint=150:min-keyint=15 -vf "drawtext=fontfile=./FZZYJW.ttf: fontsize=30:text='动云动云动云':x=if(eq(mod(t\,3)\,0)\,rand(0\,(w-text_w))\,x):y=if(eq(mod(t\,3)\,0)\,rand(0\,(h-text_h))\,y)" drawtext1-1.mp4

//加入时间，时间显示有问题，好几秒后秒表才加1.

./ffmpeg -i 720p.mp4 -vf "drawtext='fontfile=./FZZYJW.ttf: text=%{localtime\:%T}': r=25: x=(w-tw)/2: y=h-(2*lh): fontcolor=white: box=1: boxcolor=0x00000000@1" -vcodec libx264 720_time333.mp4

0 17:46:49

./ffmpeg -i 720p.mp4 -sws_dither auto -c:v libx264 720_dou.mp4 //抖动无效

0 17:47:38

./ffmpeg -i 720p.mp4 -sws_dither bayer -c:v libx264 720_dou.mp4 //抖动无效

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add time second

ffmpeg -i 01.mp4 -vf "drawtext=fontfile=/usr/share/fonts/truetype/droid/DroidSansMono.ttf : fontcolor=white : timecode='00\:00\:00\:00': r=50: text='SukerTime': x=10: y=10: box=1: boxcolor=0x00000000@1" -an -y outfont-`date +%H%M%S`.mp4

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http://ffmpeg.org/pipermail/ffmpeg-user/2013-January/012964.html

overlay and drawtext

ffmpeg -y -i 01.mp4 -i htlogo.png -filter_complex "[0][1]overlay[b];[b] drawtext=fontfile=/Windows/Fonts/arialbd.ttf:text=mytexte :fontsize=46:fontcolor=white:shadowcolor=black:shadowx=1:shadowy=1:x=W*(1-0.05*t):y=H+descent-ascent" -an mix-`date +%H%M%S`.mp4

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zoom pan

/home/suker/work/setup/ffmpeg-3.0.2-64bit-static/ffmpeg -i 01.mp4 -c:v libx264 -vf "zoompan=z='min(zoom+0.0015,10)':d=150" -t 5 -y test3.mp4

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ffmpeg -f image2 -i image1.jpg video.mpg

ffmpeg -i video.mpg -i audio.mp3 -acodec copy -vcodec copy newvideo.avi

ffmpeg -i image.jpg -i audio.mp3 -acodec copy -vcodec mpeg4 newvideo.mp4

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ffmpeg -i 01.mp4 -vf drawtext="text='suker-slide':fontsize=155:fontcolor=red:y=h-30*t:x=w-100*t" -an mix-`date +%H%M%S`.mp4

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overlay=x='if(gte(t,2), -w+(t-2)*20, NAN)

ffmpeg -i ~/Movies/objectC/bbs.chinaffmpeg.com-孙悟空.mp4 -i ~/Movies/guanlangaoshou.mp4 -vcodec libx264 -an -filter_complex "overlay=x='if(gte(t,2), -w+(t-2)*20, NAN)':y=0" -s 320x240 output.mp4

http://blog.chinaunix.net/uid-11344913-id-5705232.html

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ffmpeg -i 01.mp4 -vf drawtext="text='top-->bottom':fontsize=100:fontcolor=red:y=50*t" -an out-top-bottom.mp4

ffmpeg -i 01.mp4 -vf drawtext="text='bottom-->top':fontsize=100:fontcolor=red:y=h-30*t-text_h" -an out-bottom-top.mp4

ffmpeg -i 01.mp4 -vf drawtext="text='left-->right':fontsize=100:fontcolor=red:x=50*t" -an out-left-right.mp4

ffmpeg -i 01.mp4 -vf drawtext="text='right-->left':fontsize=100:fontcolor=red:x=w-50*t-text_w" -an out-right-left.mp4

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ffmpeg -i 01.mp4 -vf "drawtext=enable='between(t,0,75)':fontsize=100:fontcolor=white:x=10:y=10:text='Test Text', drawtext=enable='between(t,75,150)':fontsize=100:fontcolor=white:x=10:y=10:text='00000000'" -acodec copy `date +%Y%m%d_%H%M%S`.mp4

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this command ok

ffmpeg version 3.0.2-static

ffmpeg -y -i 01.mp4 -vf "drawbox=enable='between(t,2,6)':y=ih-ih/4:color=black@0.5:width=iw:height=56:t=max",\ "drawtext=enable='between(t,2,6)':fontfile=roboto.ttf:y=h-h/4+10:x=20:text='Test Heading':fontcolor=white:fontsize=16,drawtext=enable='between(t,2,6)':fontfile=roboto.ttf:y=h-h/4+30:x=20:text='Test sub heading':fontcolor=white:fontsize=12" -acodec copy `date +%Y%m%d_%H%M%S`.mp4

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ffmpeg -i 01.mp4 -vf "drawtext=enable='between(t\,0\,5)':fontsize=100:fontcolor=white:x=10:y=10:text='Test Text', drawtext=enable='between(t\,5\,8)':fontsize=100:fontcolor=white:x=10:y=10:text='00000000'" -acodec copy `date +%Y%m%d_%H%M%S`.mp4

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ffmpeg -i 01.mp4 -i liveLogo.png -filter_complex "[1:0] zoompan=z='zoom+0.005':s=640x360:d=120 [mapImage],[0:v][mapImage] overlay=main_w/2-overlay_w/2:main_h/2-overlay_h/2:enable='between(t,0,10)'" -y png_zoompan.mp4