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Sur d’autres sites (10735)

  • avcodec/dpx : Move need_align to act per line

    14 novembre 2015, par Michael Niedermayer
    avcodec/dpx : Move need_align to act per line

    Fixes out of array read
    
Fixes : 61cf123c081ee2bb774d307c75bdb99e/asan_heap-oob_1224f76_5546_bee833ffae73f752b489b9eeaac52db7.dpx
    

    Found-by : Mateusz "j00ru" Jurczyk and Gynvael Coldwind
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/dpx.c

  • 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 ?

  • how do i write the ffmpeg command line to gen a video use images which have different size and named irregularly ?

    15 mai 2016, par zzq

    I want use images to generate a video, i found a ffmpeg command option name ’-f concat’ ,anybody can give me more infomations ?

    i try like this :

    ffmpeg -r 1/5 -s 480*480 -f concat -safe 0 -i test/b.txt -c:v libx264 test/test.mp4

    but an error appear：
    Option video_size not found.

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