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• ffmpeg, add static image to beginning and end with transitions

  14 mars 2021, par CreateChange

  ffmpeg noob here, trying to help my mother with some videos for real estate walkthroughs. I'd like to set up a simple pipeline that I can run videos through and have outputted as such :

  


  

  • 5 second (silent) title card ->

  


  • xfade transition ->

  


  • property walk through ->

  


  • xfade transition ->

  


  • 5 second (silent) title card

  


  


  Considerations :

  


  

  • The intro / outro card will be the same content.

  


  • The input walkthrough videos will be of variable length so, if possible, a dynamic solution accounting for this would be ideal. If this requires me to script something using ffprobe, I can do that - just need to gain an understanding of the syntax and order of operations.

  


  • The video clip will come in with some audio already overlaid. I would like for the title cards to be silent, and have the video/audio clip fade in/out together.

  


  


  I have gotten a sample working without the transitions :

  


  ffmpeg -loop 1 -t 5 -i title_card.jpg \
    -i walkthrough.MOV \
    -f lavfi -t 0.1 -i anullsrc \
    -filter_complex "[0][2][1:v][1:a][0][2]concat=n=3:v=1:a=1[v][a]" \
    -map "[v]" -map "[a]" \
    -vcodec libx265 \
    -crf 18 \
    -vsync 2 \
    output_without_transitions.mp4


  


  I have been unable to get it to work with transitions. See below for the latest iteration :

  


  ffmpeg -loop 1 -t 5 -r 60 -i title_card.jpg \
    -r 60 -i walkthrough.MOV \
    -f lavfi -t 0.1 -i anullsrc \
    -filter_complex \
    "[0][1:v]xfade=transition=fade:duration=0.5:offset=4.5[v01]; \
    [v01][0]xfade=transition=fade:duration=0.5:offset=12.8[v]" \
    -map "[v]" \
    -vcodec libx265 \
    -crf 18 \
    -vsync 2 \
    output_with_transitions.mp4


  


  This half-works, resulting in the initial title card, fading into the video, but the second title card never occurs. Note, I also removed any references to audio, in an effort to get the transitions alone to work.

  


  I have been beating my head against the wall on this, so help would be appreciated :)

  


• Using ffserver to stream older IP cam MJPEG to RTSP

  26 mai 2016, par tmar89

  I have an older Sony IP camera that has an MJPEG stream. I need to connect this to an NVR that only takes ONVIP or RTSP and I’m trying to use ffserver and ffmpeg to convert the MJPEG stream to RTSP but it’s not working. Any have some idea of what I may be doing wrong ? Saw an error in the attempted playback about an unsupported Protocol.
  Here is my ffserver config :

  Port 8090
  
  RTSPPort 5544
  
  BindAddress 0.0.0.0
  
  RTSPBindAddress 0.0.0.0
  
  MaxClients 100
  
  MaxBandwidth 10000
  
  
  
  <feed>
  
  File /tmp/feed27.ffm
  
  FileMaxSize 5M
  
  ACL allow 127.0.0.1
  
  </feed>
  
  
  
  <stream>
  
  Format rtp
  
  Feed feed27.ffm
  
  NoAudio
  
  VideoCodec mjpeg
  
  VideoFrameRate 30
  
  VideoSize 736x480
  
  </stream>

  And here is the ffmpeg command I am using :

  [tm@tele ffserver-rtsp]# ffmpeg -f mjpeg -r 30 -s 736x480 -i http://[CAMIP]/image http://localhost:8090/feed27.ffm
  
      FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
  
        built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6)
  
        configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
  
        libavutil     50.15. 1 / 50.15. 1
  
        libavcodec    52.72. 2 / 52.72. 2
  
        libavformat   52.64. 2 / 52.64. 2
  
        libavdevice   52. 2. 0 / 52. 2. 0
  
        libavfilter    1.19. 0 /  1.19. 0
  
        libswscale     0.11. 0 /  0.11. 0
  
        libpostproc   51. 2. 0 / 51. 2. 0
  
      [mjpeg @ 0x1ece670]Estimating duration from bitrate, this may be inaccurate
  
      Input #0, mjpeg, from 'http://[CAMIP]/image':
  
        Duration: N/A, bitrate: N/A
  
          Stream #0.0: Video: mjpeg, yuvj422p, 736x480, 30 fps, 30 tbr, 1200k tbn, 30 tbc
  
      Output #0, ffm, to 'http://localhost:8090/feed27.ffm':
  
        Metadata:
  
          encoder         : Lavf52.64.2
  
          Stream #0.0: Video: mjpeg, yuvj420p, 736x480, q=2-31, 200 kb/s, 1000k tbn, 30 tbc
  
      Stream mapping:
  
        Stream #0.0 -> #0.0
  
      Press [q] to stop encoding
  
      [mjpeg @ 0x222d110]rc buffer underflow
  
      frame=  640 fps= 17 q=31.4 size=   12884kB time=21.33 bitrate=4947.5kbits/s

  When I use VLC to open the stream, it cannot be found :

  Your input can't be opened:
  
      VLC is unable to open the MRL 'rtsp://localhost:5544/stream27.mpg'. Check the log for details.

  Finally, using ffplay on the same machine :

  [tm@tele tmp]# ffplay rtsp://localhost:5544/stream27.sdp
  
  FFplay version 0.6.5, Copyright (c) 2003-2010 the FFmpeg developers
  
    built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
  
    libavutil     50.15. 1 / 50.15. 1
  
    libavcodec    52.72. 2 / 52.72. 2
  
    libavformat   52.64. 2 / 52.64. 2
  
    libavdevice   52. 2. 0 / 52. 2. 0
  
    libavfilter    1.19. 0 /  1.19. 0
  
    libswscale     0.11. 0 /  0.11. 0
  
    libpostproc   51. 2. 0 / 51. 2. 0
  
  ALSA lib pulse.c:229:(pulse_connect) PulseAudio: Unable to connect: Connection refused
  
  
  
  rtsp://localhost:5544/stream27.sdp: Protocol not supported

  And here was the log from ffserver :

  127.0.0.1:5000 - - "PLAY stream27.mpg/streamid=0 RTP/UDP"
  
  [rtp @ 0x721dc0]Unsupported codec 8
  
  127.0.0.1:0 - - "PLAY stream27.mpg/streamid=0 RTP/TCP"
  
  [rtp @ 0x728cb0]Unsupported codec 8
  
  127.0.0.1 - - [SETUP] "rtsp://localhost:5544/stream27.mpg/streamid=0 RTSP/1.0" 200 641

• Unable to build x264 for Android : configure doesn't work with cross-compile flags

  18 février 2016, par Pavel S.

  There is a problem when I try to build x264 lib in order to make it work with ffmpeg lib. I use Ubuntu 14.04.
  I have cloned fresh x264 sources.
  But when I run ./configure script, I got several issues :

  1. It doesn’t accept cross compile flags It doesn’t accept cross-compile flags (—cross-prefix, —host, —sysroot).
     Here’s how I run configure script :

     ./configure     --enable-pic \
     
                 --enable-static \
     
                 --disable-cli \
     
                 --host=arm-linux (or ARM, it doesn't work either) \
     
                 --cross-prefix=$ANDROID_NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-$HOST_ARCH/bin/arm-linux-androideabi- \
     
                 --sysroot=$ANDROID_NDK/platforms/android-14/arch-arm \

  In this case default configuration is used.

  When I don’t pass 3 last flags, flags 1-3 are successfully used in config.

  2. With any flags passed to configure script, I see these errors in config.log :

     checking for -lpostproc... no
     
     Failed commandline was:
     
     gcc conftest.c -m64  -Wall -I. -I$(SRCPATH) -std=gnu99 -mpreferred-stack-boundary=5  -lpostproc  -m64  -lm -lpthread -o conftest
     
     ...
     
     /usr/bin/ld: cannot find -lpostproc
     
     collect2: error: ld returned 1 exit status

  Same I see for

  ...
  
  conftest.c:1:32: fatal error: libswscale/swscale.h: No such file or directory
  
  #include <libswscale></libswscale>swscale.h>

  Here’s full config.log :
  http://pastebin.com/U6aHKc28

  I guess I probably need to install ffmpeg on my Ubuntu to properly build x264 ?

  Any advice ?