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• RTMPDUMP watermark is possible ?

  21 novembre 2014, par sword1st

  Hey first of all sorry for my bad english. I’m trying to record some rtmp content with rtmpdump and it works great but I want to ask : Can I add a watermark when it’s recording ? - If it’s not possible - How can I add a watermark (bottom left) with ffmpeg ? When I try this one :

  ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark];
  
  [in][watermark] overlay=10:main_h-overlay_h-10 [out]" outputvideo.flv

  it fails with error :

  "[NULL @ 00000000043c6e00] Unable to find a suitable output format for 'ΓÇôi'ΓÇôi: Invalid argument"

  Any ideas how to fix ?

• Missing audio and problems playing FLV video converted from 720p .mov file with FFMPEG

  18 novembre 2011, par undefined

  I have some .mov video files recorded from a JVC GC-FM1 HD video camera in 720p mode. I have FFMPEG running on a Linux box that I upload files to for encoding into FLV format. The video appears to be encoding ok, but there is no audio in the resulting FLV file. Also, when I play it back in Flash Player, in a browser or on Adobe Media Player, the video pauses at the start. It appears that Adobe Media Player waits for the progress bar to reach the end of the video before starting the playback - i.e. the video will load, the picture pauses, the progress bar seeks to the end as if the video were playing, then when it reaches the end the video picture starts. There is no audio on the video. I am noticing this in the video player I have built with Flash 8 using an FLVPlayback component and attached seekBar. The seek bar will start moving as if the video is playing but the picture remains paused.

  Here are some outputs from my FFMPEG log and the command I am using to encode the video.

  My FFMPEG command called from PHP :

  $cmd = 'ffmpeg -i ' . $sourcelocation.$filename.".".$fileext . '  -ab 96k -b 700k \
  
  -ar 44100 -s ' . $target['width'] . 'x' . $target['height'] . ' -ac 1 \
  
  -acodec libfaac ' . $destlocation.$filename.$ext_trans .' 2>&1';

  The output from my error log :

  FFmpeg version UNKNOWN, Copyright (c) 2000-2010 Fabrice Bellard, et al.
  
  built on Jan 22 2010 11:31:03 with gcc 4.1.2 20070925 (Red Hat 4.1.2-33)
  
  configuration: --prefix=/usr --enable-static --enable-shared --enable-gpl \
  
  --enable-nonfree --enable-postproc --enable-avfilter --enable-avfilter-lavf \
  
  --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm \
  
  --enable-libmp3lame --enable-libvorbis --enable-libx264
  
  libavutil     50. 7. 0 / 50. 7. 0
  
  libavcodec    52.48. 0 / 52.48. 0
  
  libavformat   52.47. 0 / 52.47. 0
  
  libavdevice   52. 2. 0 / 52. 2. 0
  
  libavfilter    1.17. 0 /  1.17. 0
  
  libswscale     0. 9. 0 /  0. 9. 0
  
  libpostproc   51. 2. 0 / 51. 2. 0
  
  
  
  Seems stream 0 codec frame rate differs from container frame rate: 119.88 (120000/1001) -> 59.94 (60000/1001)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'uploads/video/60974_v1.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      comment         : JVC GC-FM1
  
      comment-eng     : JVC GC-FM1
  
    Duration: 00:00:30.41, start: 0.000000, bitrate: 4158 kb/s
  
      Stream #0.0(eng): Video: h264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 4017 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 128 kb/s
  
  Output #0, rawvideo, to 'uploads/video/60974_v1.jpg':
  
      Stream #0.0(eng): Video: mjpeg, yuvj420p, 320x240 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 90k tbn, 59.94 tbc
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Press [q] to stop encoding
  
  [h264 @ 0x8e67930]B picture before any references, skipping
  
  [h264 @ 0x8e67930]decode_slice_header error
  
  [h264 @ 0x8e67930]no frame!
  
  Error while decoding stream #0.0
  
  [h264 @ 0x8e67930]B picture before any references, skipping
  
  [h264 @ 0x8e67930]decode_slice_header error
  
  [h264 @ 0x8e67930]no frame!
  
  Error while decoding stream #0.0
  
  frame=    1 fps=  0 q=3.8 Lsize=      15kB time=0.02 bitrate=7271.4kbits/s dup=482 drop=0    
  
  video:15kB audio:0kB global headers:0kB muxing overhead 0.000000%

  Which are the important errors here ?

  B picture before any references, skipping ?
  decode_slice_header error ?
  no frame ?
  or
  Seems stream 0 codec frame rate differs from container frame rate : 119.88 (120000/1001) -> 59.94 (60000/1001)

• How to compile ffmpeg via Alchemy gcc ?

  3 juillet 2014, par Rella

  So I created ffmpeg configuration file that makes it pure C (platform independent, but only theoretically)

  So my config is simple (0.6.1,0.6.3 tested) :

  ./configure  --disable-doc  --disable-ffplay --disable-ffprobe  --disable-ffserver    --disable-avdevice   --disable-avfilter   --disable-pthreads  --disable-everything --enable-muxer=flv --enable-encoder=flv --enable-encoder=h263  --disable-mmx  --disable-shared   --prefix=bin/  --disable-protocols --disable-network --disable-optimizations --disable-debug  --disable-asm --disable-stripping

  Compiling this on Linux will resolve in 4 libs with totall size of 1 mb.

  But I need to compile ffmpeg with custom compiler (opensource gcc analog called Adobe Alchemy, lets us compile C/c++ into Flash)

  It gives me errors on nearly each and every file during standart Make :

  Array @ARGV missing the @ in argument 1 of shift() at /home/rupert/Downloads/alchemy-ubuntu-v0.5a/achacks/gcc line 218.
  
  cc1: error: unrecognized command line option "-Wtype-limits"
  
  cc1: error: unrecognized command line option "-fno-signed-zeros"

  So what shall I do - how to compile ffmpeg (at least smallest part of it) via alchemy ?

  Update
  If we would fix that errors manually (2 in configure.mak and one in alchemy gcc) we would get a really messy and long output like :

  > $ make -w install
  
  
  
  make: Entering directory `/home/rupert/Downloads/ffmpeg-0.6.1'
  
  AR  libavformat/libavformat.a
  
  llvm-ld: error opening 'avformat/libavformat.l.bc' for writing!
  
  llvm-ranlib: Archive file does not exist
  
  INSTALL libavformat/libavformat.a
  
  install: cannot stat `libavformat/libavformat.a': No such file or directory
  
  llvm-ranlib: Archive file does not exist
  
  AR  libavcodec/libavcodec.a
  
  llvm-ld: error opening 'avcodec/libavcodec.l.bc' for writing!
  
  llvm-ranlib: Archive file does not exist
  
  INSTALL libavcodec/libavcodec.a
  
  install: cannot stat `libavcodec/libavcodec.a': No such file or directory
  
  llvm-ranlib: Archive file does not exist
  
  AR  libswscale/libswscale.a
  
  llvm-ld: error opening 'swscale/libswscale.l.bc' for writing!
  
  llvm-ranlib: Archive file does not exist
  
  INSTALL libswscale/libswscale.a
  
  install: cannot stat `libswscale/libswscale.a': No such file or directory
  
  llvm-ranlib: Archive file does not exist
  
  AR  libavutil/libavutil.a
  
  llvm-ld: error opening 'avutil/libavutil.l.bc' for writing!
  
  llvm-ranlib: Archive file does not exist
  
  INSTALL libavutil/libavutil.a
  
  install: cannot stat `libavutil/libavutil.a': No such file or directory
  
  llvm-ranlib: Archive file does not exist
  
  INSTALL libavformat/avformat.h
  
  INSTALL libavformat/avio.h
  
  INSTALL libavformat/libavformat.pc
  
  INSTALL libavcodec/avcodec.h
  
  INSTALL libavcodec/avfft.h
  
  INSTALL libavcodec/dxva2.h
  
  INSTALL libavcodec/opt.h
  
  INSTALL libavcodec/vaapi.h
  
  INSTALL libavcodec/vdpau.h
  
  INSTALL libavcodec/xvmc.h
  
  INSTALL libavcodec/libavcodec.pc
  
  INSTALL libswscale/swscale.h
  
  INSTALL libswscale/libswscale.pc
  
  INSTALL libavutil/adler32.h
  
  INSTALL libavutil/attributes.h
  
  INSTALL libavutil/avstring.h
  
  INSTALL libavutil/avutil.h
  
  INSTALL libavutil/base64.h
  
  INSTALL libavutil/common.h
  
  INSTALL libavutil/crc.h
  
  INSTALL libavutil/error.h
  
  INSTALL libavutil/fifo.h
  
  INSTALL libavutil/intfloat_readwrite.h
  
  INSTALL libavutil/log.h
  
  INSTALL libavutil/lzo.h
  
  INSTALL libavutil/mathematics.h
  
  INSTALL libavutil/md5.h
  
  INSTALL libavutil/mem.h
  
  INSTALL libavutil/pixdesc.h
  
  INSTALL libavutil/pixfmt.h
  
  INSTALL libavutil/rational.h
  
  INSTALL libavutil/sha1.h
  
  INSTALL libavutil/avconfig.h
  
  INSTALL libavutil/libavutil.pc
  
  LD  ffmpeg_g
  
  WARNING: While resolving call to function 'main' arguments were dropped!
  
  Cannot yet select: 0x8e707e8: i32 = ConstantPool < i64 6881500230622117888> 0
  
  llc[0x86c7dec]
  
  make: *** [ffmpeg_g] Error 6
  
  make: Leaving directory `/home/rupert/Downloads/ffmpeg-0.6.1'