Newest 'ffmpeg' Questions - Stack Overflow

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  • How to build ffmpeg with android-ndk-r10d in windows

    8 février 2019, par hosseinAmini

    In my application user can selects several images and create movie(mp4) with those images, For this reason i want to use ffmpeg library. i have searched more than 2 days but did not find a good tutorial for build ffmpeg with ndk in windows.

    can any body describe me, how to do that?(if you have any link, please share me)

    i used roman10 tutorial and this is what i do: 1-i have decompressed "ffmpeg-2.6.2" folder into "android-ndk-r10d/sources".

    2-i have created "build_android.sh" file into "ffmpeg-2.6.2" folder and these are my build_android.sh codes:

    #!/bin/bash
NDK=C:/Users/HAKHASIN/Desktop/android-ndk-r10d

SYSROOT=$NDK/platforms/android-9/arch-arm/

TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64

function build_one

{

./configure \

--prefix=$PREFIX \

--enable-shared \

--disable-static \

--disable-doc \

--disable-ffmpeg \

--disable-ffplay \

--disable-ffprobe \

--disable-ffserver \

--disable-avdevice \

--disable-doc \

--disable-symver \

--cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \

--target-os=linux \

--arch=arm \

--enable-cross-compile \

--sysroot=$SYSROOT \

--extra-cflags="-Os -fpic $ADDI_CFLAGS" \

--extra-ldflags="$ADDI_LDFLAGS" \

$ADDITIONAL_CONFIGURE_FLAG

make clean

make

make install

}

CPU=arm

PREFIX=$(pwd)/android/$CPU 

ADDI_CFLAGS="-marm"

build_one

    3- when write "sudo chmod +x build_android.sh" and "./build_android.sh" commands in cygwin, it not work correctly

    enter image description here

  • ffmpeg.exe not found inside project directory

    8 février 2019, par BayLife

    I´m currently working on my first electron / react app, which makes use of ffmpeg. I do have a problem to link the .exe file correctly.

    The prolem I´m facing is that I ffmpeg.exe is not found when trying to link it with a relative path inside my project directory. When using an absolute path it does work.

    The exe files are in the sub-folder of the current directroy.

    It does work when I´m using such path:

    'C:\\Users\\xxx\\Documents\\development\\ytDownloader\\app\\utils\\ffmpeg\\ffprobe.exe'

    But when trying it like this .setFfmpegPath('.\\ffmpeg\\ffmpeg.exe')

    or

    './ffmpeg/ffmpeg.exe'

    it does not working.

    Additionally I would really like to avoid using \\ in my project.

    Does someone have an Idea what I´m doing wrong here?

    I get this error message:

    Error: spawn .\ffmpeg\ffmpeg.exe ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:229)
    at onErrorNT (internal/child_process.js:406)
    at process._tickCallback (internal/process/next_tick.js:63)

  • Extracting frames from a video without a mouse pointer on it using ffmpeg

    8 février 2019, par Sudeep

    I have a video created using ffmpeg, I need to extract frames (screenshots) from the video where the mouse pointer present in the video should not be present in frames extracted from it.

    Sounds silly, but is there a way to do this ?

  • Broadcast webcamer over ffserver and ffmpeg

    8 février 2019, par AkBako

    I setup the ffserver on Ubuntu 16.04 UPU. I did some streami from a .webm video fileы to the site. Now I can’t start streaming from the webcam of my laptop and show it on the website. Please need help.

    Technical info:

    Client-site:Windows 10

    WebCamera: YUV 4:2:2 640x480 fps 30.0

    Server-site: VPS Server Ubuntu 16.04

    ffserver.conf

    HTTPPort 8090
HTTPBindAddress 0.0.0.0
MaxHTTPConnections 2000
MaxClients 1000
MaxBandwidth 500000
CustomLog -
NoDaemon
RTSPPort 7654
RTSPBindAddress 0.0.0.0
               # This is the input feed where FFmpeg will send
   File ./feed1.ffm            # video stream.
   FileMaxSize 1G              # Maximum file size for buffering video



    Feed feed1.ffm
    Format webm
    # Audio settings
    AudioCodec vorbis
    AudioBitRate 64             # Audio bitrate

    # Video settings
    VideoCodec libvpx
    VideoSize 640x480          # Video resolution
    VideoFrameRate 30           # Video FPS
    AVOptionVideo flags +global_header  # Parameters passed to encoder
                                       # (same as ffmpeg command-line parameters)
    AVOptionVideo cpu-used 0
    AVOptionVideo qmin 10
    AVOptionVideo qmax 42
    AVOptionVideo quality good
    AVOptionAudio flags +global_header
    PreRoll 15
    StartSendOnKey
    VideoBitRate 400 



  Format status
  # Only allow local people to get the status
  ACL allow localhost
  ACL allow 192.168.0.0 192.168.255.255


    # Just an URL redirect for index
   # Redirect index.html to the appropriate site
   URL http://XX.XXX.XXX.XXX

    Run code on Windows:

    ffmpeg -f dshow -i video="USB2.0 HD UVC WebCam" -video_size 640x480 -rtbufsize 702000k -framerate 30 -pixel_format yuyv422 -f mpegts http://XXX.XXX.XX.XX:8090/feed1.ffm

    Error message on Windows:

    Input #0, dshow, from 'video=USB2.0 HD UVC WebCam':
  Duration: N/A, start: 5326.566000, bitrate: N/A
    Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 30 fps, 30 tbr, 10000k tbn, 10000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> mpeg2video (native))
Press [q] to stop, [?] for help
[swscaler @ 06e5a000] deprecated pixel format used, make sure you did set range correctly
Output #0, mpegts, to 'http://95.183.11.180:8090/feed1.ffm':
  Metadata:
    encoder         : Lavf58.24.101
    Stream #0:0: Video: mpeg2video (4:2:2), yuv422p, 1280x720, q=2-31, 200 kb/s, 30 fps, 90k tbn, 30 tbc
    Metadata:
      encoder         : Lavc58.42.103 mpeg2video
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
av_interleaved_write_frame(): Unknown error
Error writing trailer of http://95.183.11.180:8090/feed1.ffm: Error number -10054 occurred
frame=    3 fps=0.0 q=1.6 Lsize=      46kB time=00:00:00.00 bitrate=34318545.5kbits/s speed=9.07e-05x
video:84kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[http @ 06dd5c00] URL read error:  -10054
Conversion failed!

    FFserver log:

    Fri Feb  8 03:14:58 2019 178.88.140.182 - - [POST] "/feed1.ffm HTTP/1.1" 200 4096

  • Force ffmpeg to automatically detect the video file

    8 février 2019, par Ramon

    which command can I use to have ffmpeg automatically detect the video file without having to replace "video.mp4"

    ffmpeg -i video.mp4 -vf select='gt(scene\,0.9)' -vsync 0 -an keyframes%03d.jpg

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