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Autres articles (111)

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    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

Sur d’autres sites (6914)

  • 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.

    


  • distorted video during ffmpeg h264 video with audio recording

    16 mars 2018, par Developer

    I am continuously recording a video with audio from an ip camera using ffmpeg. I am getting a distorted video when I get in to the picture. If the background is still, the video looks normal, but as soon as I step in to the picture, I see myself only being distorted while the background stays intact. If anyone went through this issue, I would really appreciate your help. Here is a command that I am using :

    ffmpeg -i rtsp://admin:admin@192.168.1.9/mpeg4 -map 0 -c:v libx264 -c:a aac -pix_fmt yuv420p -f segment -segment_time 60 -segment_wrap 10 -reset_timestamps 1 %d.mp4

    This is a ffmpeg command output :

    ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
    

    
built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
    

    
 configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-nonfree
    

    
libavutil      55. 78.100 / 55. 78.100
    

    
libavcodec     57.107.100 / 57.107.100
    

    
libavformat    57. 83.100 / 57. 83.100
    

    
libavdevice    57. 10.100 / 57. 10.100
    

    
libavfilter     6.107.100 /  6.107.100
    

    
libavresample   3.  7.  0 /  3.  7.  0
    

    
libswscale      4.  8.100 /  4.  8.100
    

    
libswresample   2.  9.100 /  2.  9.100
    

    
libpostproc    54.  7.100 / 54.  7.100

    Guessed Channel Layout for Input Stream #0.1 : mono

    Input #0, rtsp, from 'rtsp://admin:admin@192.168.1.9/mpeg4':

    Metadata :

    title           : My MPEG4 Session
    

    
comment         : My MPEG4 info

    Duration : N/A, start : 0.000000, bitrate : N/A

    Stream #0:0: Video: mpeg4 (Simple Profile), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 30 tbr, 90k tbn, 30k tbc
    

    
Stream #0:1: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s

    Stream mapping :

    Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
    

    
Stream #0:1 -> #0:1 (pcm_mulaw (native) -> aac (native))
    

    
Press [q] to stop, [?] for help
    

    
[aac @ 0x7fc303000600] Too many bits 8832.000000 > 6144 per frame requested, clamping to max
    

    
[libx264 @ 0x7fc301846800] using SAR=1/1
    

    
[libx264 @ 0x7fc301846800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    

    
[libx264 @ 0x7fc301846800] profile High, level 3.0
    

    
[libx264 @ 0x7fc301846800] 264 - core 148 r2795 aaa9aa8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 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=6 lookahead_threads=1 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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    

    
[segment @ 0x7fc301844400] Opening '0.mp4' for writing

    Output #0, segment, to ’%d.mp4’ :

    Metadata :

    title           : My MPEG4 Session
    

    
comment         : My MPEG4 info
    

    
encoder         : Lavf57.83.100
    

    
Stream #0:0: Video: h264 (libx264), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 30 fps, 15360 tbn, 30 tbc
    

    
Metadata:
    

    
  encoder         : Lavc57.107.100 libx264
    

    
Side data:
    

    
  cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    

    
Stream #0:1: Audio: aac (LC), 8000 Hz, mono, fltp, 48 kb/s
    

    
Metadata:
    

    
  encoder         : Lavc57.107.100 aac
    

    
frame=   57 fps=0.0 q=29.0 size=N/A time=00:00:02.04 bitrate=N/A dup=22 drop=0 sframe=   73 fps= 68 q=29.0 size=N/A time=00:00:02.56 bitrate=N/A dup=22 drop=0 s
    

    
frame=   89 fps= 54 q=29.0 size=N/A time=00:00:03.07 bitrate=N/A dup=22 drop=0 sframe=  106 fps= 48 q=29.0 size=N/A time=00:00:03.58 bitrate=N/A dup=22 drop=0 s
    

    
frame=  122 fps= 45 q=29.0 size=N/A time=00:00:04.09 bitrate=N/A dup=22 drop=0 sframe=  137 fps= 42 q=29.0 size=N/A time=00:00:04.48 bitrate=N/A dup=22 drop=0 s
    

    
frame=  151 fps= 40 q=29.0 size=N/A time=00:00:04.97 bitrate=N/A dup=22 drop=0 s
    

    
frame=  156 fps= 37 q=-1.0 Lsize=N/A time=00:00:05.48 bitrate=N/A dup=22 drop=0 speed= 1.3x  

    Update : It works fine in vlc player. I am adding a link to the destorted video : https://drive.google.com/file/d/1QCc7XUbePBI3v1h0sNQgU0guHA2AwgRT/view?usp=sharing

  • Why calling libav* library doesn't have same quality as ffmpeg command line ?

    10 mai 2016, par seaguest

    I am using the ffmpeg 3 to do the video format conversion, it works fine when I use the command line mode, but when I call the libav* library, I get a audio quality loss problem (there is a lot of noises in the audio).

    Here are the two files :

    mv.webm - original file
    mv2.mp4 converted with libarary , a lot of noises

    Here is the probe information for the mv.webm :

    $ ffprobe mv.webm
    
ffprobe version N-79826-g64fd62d Copyright (c) 2007-2016 the FFmpeg developers
    
  built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
    
  configuration: --prefix=/home/seaguest/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/seaguest/ffmpeg_build/include --extra-ldflags=-L/home/seaguest/ffmpeg_build/lib --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-nonfree
    
  libavutil      55. 24.100 / 55. 24.100
    
  libavcodec     57. 39.100 / 57. 39.100
    
  libavformat    57. 36.100 / 57. 36.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 45.100 /  6. 45.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, matroska,webm, from 'mv.webm':
    
  Metadata:
    
    encoder         : Lavf57.36.100
    
  Duration: 00:00:30.00, start: 0.000000, bitrate: 935 kb/s
    
    Stream #0:0: Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn (default)
    
    Stream #0:1: Audio: vorbis, 44100 Hz, stereo, fltp (default)

    I checked the log printed by command line mode and calling code mode, the setting looks like the same, here are the logs :

    $ ffmpeg -i mv.webm -c:a aac -c:v libx264  mv.mp4
    
ffmpeg version N-79826-g64fd62d Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
    
  configuration: --prefix=/home/seaguest/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/seaguest/ffmpeg_build/include --extra-ldflags=-L/home/seaguest/ffmpeg_build/lib --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-nonfree
    
  libavutil      55. 24.100 / 55. 24.100
    
  libavcodec     57. 39.100 / 57. 39.100
    
  libavformat    57. 36.100 / 57. 36.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 45.100 /  6. 45.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, matroska,webm, from 'mv.webm':
    
  Metadata:
    
    encoder         : Lavf57.36.100
    
  Duration: 00:00:30.00, start: 0.000000, bitrate: 935 kb/s
    
    Stream #0:0: Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn (default)
    
    Stream #0:1: Audio: vorbis, 44100 Hz, stereo, fltp (default)
    
[libx264 @ 0x3e5d880] using SAR=1/1
    
[libx264 @ 0x3e5d880] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x3e5d880] profile High, level 3.0
    
[libx264 @ 0x3e5d880] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 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=6 lookahead_threads=1 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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
[mp4 @ 0x3e2f680] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    
    Last message repeated 1 times
    
Output #0, mp4, to 'mv.mp4':
    
  Metadata:
    
    encoder         : Lavf57.36.100
    
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=2-31, 25 fps, 12800 tbn (default)
    
    Metadata:
    
      encoder         : Lavc57.39.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc57.39.100 aac
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (vp8 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (vorbis (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
frame=  750 fps=229 q=-1.0 Lsize=    2508kB time=00:00:30.02 bitrate= 684.5kbits/s speed=9.17x
    
video:2023kB audio:459kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.052857%
    
[libx264 @ 0x3e5d880] frame I:11    Avg QP:15.29  size: 20395
    
[libx264 @ 0x3e5d880] frame P:345   Avg QP:20.93  size:  4350
    
[libx264 @ 0x3e5d880] frame B:394   Avg QP:23.55  size:   879
    
[libx264 @ 0x3e5d880] consecutive B-frames: 25.2%  3.2% 33.2% 38.4%
    
[libx264 @ 0x3e5d880] mb I  I16..4: 44.1% 32.5% 23.4%
    
[libx264 @ 0x3e5d880] mb P  I16..4:  1.5%  3.6%  0.6%  P16..4: 28.9% 11.2%  4.7%  0.0%  0.0%    skip:49.5%
    
[libx264 @ 0x3e5d880] mb B  I16..4:  0.0%  0.1%  0.0%  B16..8: 27.4%  2.0%  0.4%  direct: 0.8%  skip:69.3%  L0:40.0% L1:53.3% BI: 6.7%
    
[libx264 @ 0x3e5d880] 8x8 transform intra:52.6% inter:74.9%
    
[libx264 @ 0x3e5d880] coded y,uvDC,uvAC intra: 57.5% 68.6% 35.9% inter: 10.6% 11.9% 2.6%
    
[libx264 @ 0x3e5d880] i16 v,h,dc,p: 36% 42%  7% 15%
    
[libx264 @ 0x3e5d880] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 23% 15% 6%  7%  7% 10%  7% 10%
    
[libx264 @ 0x3e5d880] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 27% 14% 6%  8%  7%  7%  6%  6%
    
[libx264 @ 0x3e5d880] i8c dc,h,v,p: 46% 34% 11%  9%
    
[libx264 @ 0x3e5d880] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x3e5d880] ref P L0: 63.9% 20.8% 11.2%  4.1%
    
[libx264 @ 0x3e5d880] ref B L0: 93.1%  6.1%  0.8%
    
[libx264 @ 0x3e5d880] ref B L1: 95.8%  4.2%
    
[libx264 @ 0x3e5d880] kb/s:552.32
    
[aac @ 0x3e5ec00] Qavg: 3030.804
    

    

    
$ ffprobe mv.mp4
    
ffprobe version N-79826-g64fd62d Copyright (c) 2007-2016 the FFmpeg developers
    
  built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
    
  configuration: --prefix=/home/seaguest/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/seaguest/ffmpeg_build/include --extra-ldflags=-L/home/seaguest/ffmpeg_build/lib --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-nonfree
    
  libavutil      55. 24.100 / 55. 24.100
    
  libavcodec     57. 39.100 / 57. 39.100
    
  libavformat    57. 36.100 / 57. 36.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 45.100 /  6. 45.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'mv.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.36.100
    
  Duration: 00:00:30.01, start: 0.000000, bitrate: 684 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 552 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler

    For the calling code mode :

    $ go run transcode.go mv.webm mv1.mp4
    
# github.com/3d0c/gmf
    
../packet.go: In function ‘_cgo_3c42eeb63b1e_Cfunc_avcodec_decode_audio4’:
    
../packet.go:87:2: warning: ‘avcodec_decode_audio4’ is deprecated [-Wdeprecated-declarations]
    
 func (this *Packet) decode(cc *CodecCtx, frame *Frame) (*Frame, bool, int, error) {
    
  ^
    
In file included from ../packet.go:7:0:
    
/home/seaguest/ffmpeg_build/include/libavcodec/avcodec.h:4685:5: note: declared here
    
 int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
    
     ^
    
../packet.go: In function ‘_cgo_3c42eeb63b1e_Cfunc_avcodec_decode_video2’:
    
../packet.go:104:2: warning: ‘avcodec_decode_video2’ is deprecated [-Wdeprecated-declarations]
    
   }
    
  ^
    
In file included from ../packet.go:7:0:
    
/home/seaguest/ffmpeg_build/include/libavcodec/avcodec.h:4734:5: note: declared here
    
 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
    
     ^
    
[libx264 @ 0x2d82400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x2d82400] profile High, level 3.0
    
[libx264 @ 0x2d82400] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 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=6 lookahead_threads=1 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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
[mp4 @ 0x2d480c0] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
    
[mp4 @ 0x2d480c0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    
[mp4 @ 0x2d480c0] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
    
[mp4 @ 0x2d480c0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    

    

    

    
$ ffprobe mv1.mp4
    
ffprobe version N-79826-g64fd62d Copyright (c) 2007-2016 the FFmpeg developers
    
  built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
    
  configuration: --prefix=/home/seaguest/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/seaguest/ffmpeg_build/include --extra-ldflags=-L/home/seaguest/ffmpeg_build/lib --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-nonfree
    
  libavutil      55. 24.100 / 55. 24.100
    
  libavcodec     57. 39.100 / 57. 39.100
    
  libavformat    57. 36.100 / 57. 36.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 45.100 /  6. 45.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'mv1.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.36.100
    
  Duration: 00:00:30.00, start: 0.000000, bitrate: 751 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x480, 613 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler

    Checking the setting section, crf=23.0 for both (the rest are exactly the same), but the output bitrate are different (the audio for calling code mode has a lot of noises), how is that possible ?

    Why the command line mode and use libav* library mode with same setting, but have different output ?
    What should I do to call libav* library to get lossless video conversion ?

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