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Sur d’autres sites (7603)

  • avfilter/formats : allow unknown channel layouts by default

    22 novembre 2016, par Marton Balint
    avfilter/formats : allow unknown channel layouts by default

    Since the default in the libav fork is to only allow known layouts, making
    
unknown layouts allowed by default here can be a security risk for filters
    
directly merged from libav. However, usually it is simple to detect such cases,
    
use of av_get_channel_layout_nb_channels is a good indicator, so I suggest we
    
change this regardless.
    

    See http://ffmpeg.org/pipermail/ffmpeg-devel/2016-November/203204.html.
    

    This patch indirectly adds unknown channel layout support for filters where
    
query_formats is not specified :
    

    abench
    
afifo
    
ainterleave
    
anullsink
    
apad
    
aperms
    
arealtime
    
aselect
    
asendcmd
    
asetnsamples
    
asetpts
    
asettb
    
ashowinfo
    
azmq
    

    It introduces a query_formats callback for the asyncts filter, which only
    
supports known channel layouts since it is using libavresample.
    

    And it removes .query_formats callback from filters where it was only there to
    
support unknown layouts, as this is now the default :
    

    aloop
    
ametadata
    
anull
    
asidedata
    
asplit
    
atrim
    

    Acked-by : Nicolas George <george@nsup.org>
    
Signed-off-by : Marton Balint <cus@passwd.hu>
    • [DH] libavfilter/af_anull.c
    • [DH] libavfilter/af_asyncts.c
    • [DH] libavfilter/f_loop.c
    • [DH] libavfilter/f_metadata.c
    • [DH] libavfilter/f_sidedata.c
    • [DH] libavfilter/formats.c
    • [DH] libavfilter/formats.h
    • [DH] libavfilter/split.c
    • [DH] libavfilter/trim.c

  • How encrypt video file using ffmpeg with a single file output

    9 décembre 2016, par Akshay Kumar

    I am trying to encrypt a video(mp4) file having a single file output. Here is the command that I use :
    ffmpeg -i -c:v libx264 -preset slow -hls_list_size 0 -hls_key_info_file encrypt.keyinfo -f hls -hls_playlist_type vod -hls_time 20 -threads 0 .
    However when I play the generated m3u8 file in safari the video stop for seconds(timer goes on) and resume after few seconds. This is happens multiple times in a single video playback.
    Can anyone help me to encode video file with single output file.

    Full command :

    /usr/local/bin/ffmpeg -i MJ.mp4 -c:v libx264  -preset slow -hls_list_size 0 -hls_key_info_file encrypt.keyinfo -f hls -hls_playlist_type vod -hls_flags single_file -hls_time 20  -threads 0 encrypted15.m3u8

    It’s corresponding console output :

    ffmpeg version 3.2.2 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-vda
    
  libavutil      55. 34.100 / 55. 34.100
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.100 / 57. 56.100
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'MJ.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf54.63.104
    
  Duration: 00:04:43.21, start: 0.000000, bitrate: 1070 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 938 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (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
    
[libx264 @ 0x7f8930818200] using SAR=1/1
    
[libx264 @ 0x7f8930818200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x7f8930818200] profile High, level 3.1
    
Output #0, hls, to 'encrypted15.m3u8':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.56.100
    
    Stream #0:0(und): Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 90k tbn, 25 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
      encoder         : Lavc57.64.101 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc57.64.101 aac
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
frame= 7079 fps= 64 q=-1.0 Lsize=N/A time=00:04:43.21 bitrate=N/A speed=2.55x
    
video:30401kB audio:4156kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    
[libx264 @ 0x7f8930818200] frame I:66    Avg QP:16.19  size: 44529
    
[libx264 @ 0x7f8930818200] frame P:2496  Avg QP:20.09  size:  7995
    
[libx264 @ 0x7f8930818200] frame B:4517  Avg QP:21.77  size:  1823
    
[libx264 @ 0x7f8930818200] consecutive B-frames:  5.7% 10.3% 52.4% 31.6%
    
[libx264 @ 0x7f8930818200] mb I  I16..4: 34.7% 39.2% 26.0%
    
[libx264 @ 0x7f8930818200] mb P  I16..4:  4.8%  7.0%  0.7%  P16..4: 31.6%  7.1%  2.6%  0.0%  0.0%    skip:46.2%
    
[libx264 @ 0x7f8930818200] mb B  I16..4:  0.4%  0.4%  0.0%  B16..8: 24.8%  1.6%  0.1%  direct: 0.9%  skip:71.8%  L0:39.4% L1:57.4% BI: 3.2%
    
[libx264 @ 0x7f8930818200] 8x8 transform intra:52.6% inter:73.7%
    
[libx264 @ 0x7f8930818200] direct mvs  spatial:99.9% temporal:0.1%
    
[libx264 @ 0x7f8930818200] coded y,uvDC,uvAC intra: 23.4% 41.8% 12.7% inter: 3.8% 6.4% 0.3%
    
[libx264 @ 0x7f8930818200] i16 v,h,dc,p: 40% 25% 12% 23%
    
[libx264 @ 0x7f8930818200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 16% 36%  2%  3%  4%  4%  3%  4%
    
[libx264 @ 0x7f8930818200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 19% 14%  5%  8%  7%  8%  6%  6%
    
[libx264 @ 0x7f8930818200] i8c dc,h,v,p: 49% 21% 21%  8%
    
[libx264 @ 0x7f8930818200] Weighted P-Frames: Y:6.7% UV:6.2%
    
[libx264 @ 0x7f8930818200] ref P L0: 66.8% 10.5% 12.6%  4.9%  5.1%  0.2%  0.0%
    
[libx264 @ 0x7f8930818200] ref B L0: 82.4% 12.1%  4.5%  1.0%
    
[libx264 @ 0x7f8930818200] ref B L1: 99.2%  0.8%
    
[libx264 @ 0x7f8930818200] kb/s:879.53
    
[aac @ 0x7f8930811e00] Qavg: 7830.089

  • FFmpeg : Could not get frame filename with strftime

    7 décembre 2016, par clic

    I want to have a timestamp in my JPEG files generated by FFmpeg.
    I’m getting the above error message when executing FFmpeg like this :

    ffmpeg -f dshow -framerate 50 -i video="XI100DUSB-HDMI Video" -strftime 1 "%Y-%m-%d_%H-%M-%S_thumb%04d.jpg"

    It also says :

    av_interleaved_write_frame() : Invalid argument

    What am I doing wrong ?
    Thanks !

    Complete FFmpeg output :

    ffmpeg version 3.2 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 5.4.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --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-li
    
bopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --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-decklink --enable-zlib
    
  libavutil      55. 34.100 / 55. 34.100
    
  libavcodec     57. 64.100 / 57. 64.100
    
  libavformat    57. 56.100 / 57. 56.100
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
Input #0, dshow, from 'video=XI100DUSB-HDMI Video':
    
  Duration: N/A, start: 777552.702000, bitrate: N/A
    
    Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 50 fps, 50 tbr, 10000k tbn, 10000k tbc
    
[swscaler @ 0000000001c8c940] deprecated pixel format used, make sure you did set range correctly
    
[mjpeg @ 0000000001c7ea60] removing common factors from framerate
    
Output #0, image2, to '%Y-%m-%d_%H-%M-%S_thumb%04d.jpg':
    
  Metadata:
    
    encoder         : Lavf57.56.100
    
    Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc
    
    Metadata:
    
      encoder         : Lavc57.64.100 mjpeg
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
    
Press [q] to stop, [?] for help
    
[image2 @ 0000000001c7afe0] Could not get frame filename with strftime
    
av_interleaved_write_frame(): Invalid argument
    
frame=    1 fps=0.0 q=7.9 Lsize=N/A time=00:00:00.02 bitrate=N/A speed=0.687x
    
video:101kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    
[dshow @ 0000000001c728a0] real-time buffer [XI100DUSB-HDMI Video] [video input] too full or near too full (136% of size: 3041280 [rtbufsize parameter])! frame dropped!
    
Conversion failed!

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