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• FFMPEG problems with real-time buffer

  27 juin 2024, par Charles Kiel

  I'm trying to use FFMPEG (Windows) to encode a stream from a video capture card via dshow and send to a RTMP server. THis is my command line ;

  



      ffmpeg -f dshow -i video="AVerMedia BDA Analog Capture Secondary":audio="Microphone (6- C-Media USB Audi" -vf scale=1280:720 -vcodec libx264 -r 30 -rtbufsize 702000k -acodec mp3 -ac 2 -ar 44100 -ab 128k -pix_fmt yuv420p -tune zerolatency -preset ultrafast -f flv "rtmp://xxx.xxx.xxx.xxx/stream/key"        ffmpeg version N-86950-g1bef008 Copyright (c) 2000-2017 the FFmpeg developers
    built with gcc 7.1.0 (GCC)
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable
    -libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspe
    ex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    libavutil      55. 70.100 / 55. 70.100
    libavcodec     57.102.100 / 57.102.100
    libavformat    57. 76.100 / 57. 76.100
    libavdevice    57.  7.100 / 57.  7.100
    libavfilter     6. 98.100 /  6. 98.100
    libswscale      4.  7.102 /  4.  7.102
    libswresample   2.  8.100 /  2.  8.100
    libpostproc    54.  6.100 / 54.  6.100
    Guessed Channel Layout for Input Stream #0.1 : stereo
    Input #0, dshow, from 'video=AVerMedia BDA Analog Capture Secondary:audio=Microphone (6- C-Media USB Audi':
    Duration: N/A, start: 2035.202000, bitrate: N/A
    Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x480, 29.97 fps, 29.97 tbr, 10000k tbn, 10000k tbc
    Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
    [dshow @ 00000000005f90e0] real-time buffer [AVerMedia BDA Analog Capture Secondary] [video input] too full or near too full (68% of size: 3041280 [rtbufsize parameter])! frame dropped!
    [dshow @ 00000000005f90e0] real-time buffer [AVerMedia BDA Analog Capture Secondary] [video input] too full or near too full (90% of size: 3041280 [rtbufsize parameter])! frame dropped!
    [dshow @ 00000000005f90e0] real-time buffer [AVerMedia BDA Analog Capture Secondary] [video input] too full or near too full (113% of size: 3041280 [rtbufsize parameter])! frame dropped!
    Last message repeated 46 times
    Stream mapping:
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    Stream #0:1 -> #0:1 (pcm_s16le (native) -> mp3 (libmp3lame))
    Press [q] to stop, [?] for help
    [dshow @ 00000000005f90e0] real-time buffer [AVerMedia BDA Analog Capture Secondary] [video input] too full or near too full (113% of size: 3041280 [rtbufsize parameter])! frame dropped!
    [libx264 @ 0000000005b16640] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    [libx264 @ 0000000005b16640] profile Constrained Baseline, level 3.1
    [libx264 @ 0000000005b16640] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=2
    1,11 fast_pskip=1 chroma_qp_offset=0 threads=11 lookahead_threads=11 sliced_threads=1 slices=11 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ra
    tio=1.40 aq=0
    [dshow @ 00000000005f90e0] real-time buffer [AVerMedia BDA Analog Capture Secondary] [video input] too full or near too full (113% of size: 3041280 [rtbufsize parameter])! frame dropped!
    Past duration 0.999992 too large


  



  The buffer too full message are non-stop. I can use Open Broadcast Software (OBS) and stream with no problem (I'm pretty sure it also uses ffmpeg), so I'm doing something wrong.

  


• FFmpeg : no image is displayed when broadcasting flv made of speex / mellymoser and libx264

  15 septembre 2013, par wvxvw

  ffmpeg -f alsa -i hw:PCH,0 -f x11grab -s 1920x1200 -r 15 -i :0.0 \
  
      -acodec nellymoser -ar 22050 -ac 1 -audio_preload 1000000 -vcodec libx264 \
  
      -preset fast -pix_fmt yuv420p -s 1280x800 -maxrate 1000k -threads 0 -f flv "$URL"

  This is the command I'm using, but I don't get any visible output, only sound. FFmpeg gives no warnings. What am I doing wrong ?

  ---

  If I remove -audio_preload, the streaming works, but the audio comes with increasing delay (grows about a minute every minute).

  ---

  The output, as per request :

  ffmpeg version 1.0.7 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on May 14 2013 21:59:35 with gcc 4.7.2 (GCC) 20121109 (Red Hat 4.7.2-8)
  
    configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-frei0r --enable-gnutls --enable-libass --enable-libcdio --enable-libcelt --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
  
    libavutil      51. 73.101 / 51. 73.101
  
    libavcodec     54. 59.100 / 54. 59.100
  
    libavformat    54. 29.104 / 54. 29.104
  
    libavdevice    54.  2.101 / 54.  2.101
  
    libavfilter     3. 17.100 /  3. 17.100
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  [alsa @ 0xc5e8e0] Estimating duration from bitrate, this may be inaccurate
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
  Input #0, alsa, from 'hw:PCH,0':
  
    Duration: N/A, start: 1379234523.677560, bitrate: 1536 kb/s
  
      Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
  
  [x11grab @ 0xc6cda0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1920 height: 1200
  
  [x11grab @ 0xc6cda0] shared memory extension found
  
  [x11grab @ 0xc6cda0] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, x11grab, from ':0.0':
  
    Duration: N/A, start: 1379234523.843273, bitrate: 1105920 kb/s
  
      Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1200, 1105920 kb/s, 15 tbr, 1000k tbn, 15 tbc
  
  [libx264 @ 0xc59e00] VBV maxrate specified, but no bufsize, ignored
  
  [libx264 @ 0xc59e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0xc59e00] profile High, level 3.2
  
  [libx264 @ 0xc59e00] 264 - core 128 r2223 f6a8615 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=15 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, flv, to 'rtmp://live.justin.tv/app/live_key':
  
    Metadata:
  
      encoder         : Lavf54.29.104
  
      Stream #0:0: Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 1280x800, q=-1--1, 1k tbn, 15 tbc
  
      Stream #0:1: Audio: nellymoser ([6][0][0][0] / 0x0006), 22050 Hz, mono, flt, 128 kb/s
  
  Stream mapping:
  
    Stream #1:0 -> #0:0 (rawvideo -> libx264)
  
    Stream #0:0 -> #0:1 (pcm_s16le -> nellymoser)
  
  Press [q] to stop, [?] for help
  
  [alsa @ 0xc5e8e0] ALSA buffer xrun.

• FFmpeg audio dont work in converted videos

  28 octobre 2013, par Bar Cumberworth

  NOTICE : when i convert videos via terminal and download them from ftp into pc the audio works fine. I use :

  if($ext == "avi" && $convert_avi == true)
  
              {
  
                  $convert_source = _VIDEOS_DIR_PATH.$new_name;
  
                  $conv_name = substr(md5($file['name'].rand(1,888)), 2, 10).".mp4";
  
                  $converted_file  = _VIDEOS_DIR_PATH.$conv_name;
  
                  $ffmpeg_command = 'ffmpeg -i '.$convert_source.' -acodec libmp3lame -vcodec libx264 -s 1280x720 -ar 44100 -async 44100 -r 29.970 -ac 2 -qscale 5 '.$converted_file;
  
                  echo exec($ffmpeg_command);
  
                  $sql = "UPDATE pm_temp SET url = '".$conv_name."' WHERE url = '".$new_name."' LIMIT 1";
  
                  $result = @mysql_query($sql);
  
                  unlink($convert_source);    
  
              }

  This code to convert avi to mp4 ffmpeg concole output :

  root@1tb:~# ffmpeg -i sample.avi -acodec libmp3lame -vcodec libx264 -s 1280x720 -ar 44100 -async 44100 -r 29.970 -ac 2 -qscale 5 goodsample.mp4
  
  ffmpeg version 0.7.15, Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Feb 22 2013 07:18:58 with gcc 4.4.5
  
    configuration: --enable-libdc1394 --prefix=/usr --extra-cflags='-Wall -g ' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-avfilter --enable-libdirac --disable-decoder=libdirac --enable-libfreetype --enable-libschroedinger --disable-encoder=libschroedinger -                                                                                                                                                             s
  
    libavutil    50. 43. 0 / 50. 43. 0
  
    libavcodec   52.123. 0 / 52.123. 0
  
    libavformat  52.111. 0 / 52.111. 0
  
    libavdevice  52.  5. 0 / 52.  5. 0
  
    libavfilter   1. 80. 0 /  1. 80. 0
  
    libswscale    0. 14. 1 /  0. 14. 1
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  [mp3 @ 0x191d4100] Header missing
  
  [mpeg4 @ 0x191d1dc0] Invalid and inefficient vfw-avi packed B frames detected
  
  Input #0, avi, from 'sample.avi':
  
    Metadata:
  
      encoder         : VirtualDubMod 1.5.10.2 (build 2540/release)
  
    Duration: 00:01:01.81, start: 0.000000, bitrate: 1194 kb/s
  
      Stream #0.0: Video: mpeg4, yuv420p, 640x352 [PAR 1:1 DAR 20:11], 23.98 tbr,
  
      Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 128 kb/s
  
  [buffer @ 0x191d1c80] w:640 h:352 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
  
  [scale @ 0x191d6880] w:640 h:352 fmt:yuv420p -> w:1280 h:720 fmt:yuv420p flags:0
  
  [libx264 @ 0x191ce5a0] Default settings detected, using medium profile
  
  [libx264 @ 0x191ce5a0] using SAR=45/44
  
  [libx264 @ 0x191ce5a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle S
  
  [libx264 @ 0x191ce5a0] profile High, level 3.1
  
  [libx264 @ 0x191ce5a0] 264 - core 118 - H.264/MPEG-4 AVC codec - Copyleft 2003-2                                                                                                                                                             6 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_off                                                                                                                                                             1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_l
  
  Output #0, mp4, to 'goodsample.mp4':
  
    Metadata:
  
      encoder         : Lavf52.111.0
  
      Stream #0.0: Video: libx264, yuv420p, 1280x720 [PAR 45:44 DAR 20:11], q=2-31
  
      Stream #0.1: Audio: libmp3lame, 44100 Hz, stereo, s16, 64 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  Press [q] to stop, [?] for help
  
  [mp3 @ 0x191d4100] Header missing
  
  Error while decoding stream #0.1
  
  [mpeg4 @ 0x191d1dc0] Invalid and inefficient vfw-avi packed B frames detected
  
  [mp3 @ 0x191d4100] incomplete frame 9467kB time=00:01:00.32 bitrate=1285.5kbits/
  
  Error while decoding stream #0.1
  
  frame= 1852 fps= 20 q=29.0 Lsize=    9652kB time=00:01:01.72 bitrate=1280.9kbits
  
  video:9121kB audio:483kB global headers:0kB muxing overhead 0.499688%
  
  frame I:11    Avg QP:16.78  size: 51456
  
  [libx264 @ 0x191ce5a0] frame P:784   Avg QP:20.81  size:  8954
  
  [libx264 @ 0x191ce5a0] frame B:1057  Avg QP:26.06  size:  1659
  
  [libx264 @ 0x191ce5a0] consecutive B-frames: 22.0%  3.1%  7.5% 67.4%
  
  [libx264 @ 0x191ce5a0] mb I  I16..4: 31.1% 59.8%  9.1%
  
  [libx264 @ 0x191ce5a0] mb P  I16..4:  1.8%  2.6%  0.2%  P16..4: 24.3%  7.0%  4.0
  
  [libx264 @ 0x191ce5a0] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8: 22.7%  0.8%  0.2
  
  [libx264 @ 0x191ce5a0] 8x8 transform intra:57.0% inter:72.6%
  
  [libx264 @ 0x191ce5a0] coded y,uvDC,uvAC intra: 44.4% 33.3% 10.3% inter: 7.6% 5.
  
  [libx264 @ 0x191ce5a0] i16 v,h,dc,p: 68% 14%  8% 10%
  
  [libx264 @ 0x191ce5a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 14% 27%  5%  7%  7%  6
  
  [libx264 @ 0x191ce5a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 14% 14%  6% 10%  9%  7
  
  [libx264 @ 0x191ce5a0] i8c dc,h,v,p: 67% 13% 17%  3%
  
  [libx264 @ 0x191ce5a0] Weighted P-Frames: Y:1.9% UV:0.4%
  
  [libx264 @ 0x191ce5a0] ref P L0: 62.2% 12.8% 10.3% 14.5%  0.2%
  
  [libx264 @ 0x191ce5a0] ref B L0: 88.1%  5.5%  6.4%
  
  [libx264 @ 0x191ce5a0] ref B L1: 95.7%  4.3%
  
  [libx264 @ 0x191ce5a0] kb/s:1209.03

  I know there is couple errors tough, but i dont know hot to fix it. Also i would be very thankfull if someone can help reduce video size but is not main problem video weights as original avi but sill.