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  • FFMPEG : Change Video during encoding (using mapping)

    18 octobre 2013, par Tchoupi

    I'm currently trying to concat several videos using a complex filter :

    ffmpeg.exe -threads 8 -i "D:\Temporary0.mp4"  -i "D:\Temporary1.mp4"  -i "D:\Temporary2.mp4"  -filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a]  concat=n=3:v=1:a=1 [v] [a] " -map "[v]" -map "[a]"  -vcodec libx264 -b 2500000 -s 1920:1080 -y D:\EditedVideo.mp4

    This command work fine.
    Edit : Here the output of the command :

    ffmpeg version N-56297-g7ac6c63 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Sep 15 2013 18:02:28 with gcc 4.7.3 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu
    
ray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
    
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
    
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
    
  libavutil      52. 43.100 / 52. 43.100
    
  libavcodec     55. 31.101 / 55. 31.101
    
  libavformat    55. 16.102 / 55. 16.102
    
  libavdevice    55.  3.100 / 55.  3.100
    
  libavfilter     3. 84.100 /  3. 84.100
    
  libswscale      2.  5.100 /  2.  5.100
    
  libswresample   0. 17.103 /  0. 17.103
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\Temporary0.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.16.102
    
  Duration: 00:00:02.91, start: 0.033333, bitrate: 8998 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 8965 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\Temporary1.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.16.102
    
  Duration: 00:00:05.00, start: 0.023220, bitrate: 846 kb/s
    
    Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 835 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #1:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 1 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\Temporary2.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.16.102
    
  Duration: 00:00:04.35, start: 0.033333, bitrate: 4684 kb/s
    
    Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 4581 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #2:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Please use -b:a or -b:v, -b is ambiguous
    
[libx264 @ 04f617e0] using SAR=1/1
    
[libx264 @ 04f617e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 04f617e0] profile High, level 4.0
    
[libx264 @ 04f617e0] 264 - core 135 r2345 f0c1c53 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subm
    
e=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=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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 r
    
c=abr mbtree=1 bitrate=2500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'D:\EditedVideo.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.16.102
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 2500 kb/s, 12800 tbn, 25 tbc
    
    Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
    
Stream mapping:
    
  Stream #0:0 (h264) -> concat:in0:v0
    
  Stream #0:1 (aac) -> concat:in0:a0
    
  Stream #1:0 (h264) -> concat:in1:v0
    
  Stream #1:1 (aac) -> concat:in1:a0
    
  Stream #2:0 (h264) -> concat:in2:v0
    
  Stream #2:1 (aac) -> concat:in2:a0
    
  concat:out:v0 -> Stream #0:0 (libx264)
    
  concat:out:a0 -> Stream #0:1 (libvo_aacenc)
    
Press [q] to stop, [?] for help
    
frame=  306 fps= 43 q=-1.0 Lsize=    3557kB time=00:00:12.29 bitrate=2369.4kbits/s dup=1 drop=0
    
video:3353kB audio:193kB subtitle:0 global headers:0kB muxing overhead 0.288541%
    
[libx264 @ 04f617e0] frame I:3     Avg QP:21.78  size:173526
    
[libx264 @ 04f617e0] frame P:112   Avg QP:25.76  size: 17363
    
[libx264 @ 04f617e0] frame B:191   Avg QP:31.04  size:  5068
    
[libx264 @ 04f617e0] consecutive B-frames: 11.8% 14.4%  2.0% 71.9%
    
[libx264 @ 04f617e0] mb I  I16..4: 14.6% 82.7%  2.6%
    
[libx264 @ 04f617e0] mb P  I16..4:  3.5%  8.8%  0.2%  P16..4: 30.1%  5.3%  2.6%  0.0%  0.0%    skip:49.4%
    
[libx264 @ 04f617e0] mb B  I16..4:  0.7%  1.1%  0.0%  B16..8: 21.6%  1.2%  0.1%  direct: 1.2%  skip:74.1%  L0:47.0% L1:50.6% BI: 2.4%
    
[libx264 @ 04f617e0] final ratefactor: 25.69
    
[libx264 @ 04f617e0] 8x8 transform intra:70.8% inter:88.5%
    
[libx264 @ 04f617e0] coded y,uvDC,uvAC intra: 34.3% 50.2% 7.2% inter: 7.3% 13.3% 0.3%
    
[libx264 @ 04f617e0] i16 v,h,dc,p: 22% 33%  7% 37%
    
[libx264 @ 04f617e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 22% 34%  4%  5%  4%  5%  4%  5%
    
[libx264 @ 04f617e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 22% 18%  5%  6%  6%  5%  6%  4%
    
[libx264 @ 04f617e0] i8c dc,h,v,p: 60% 21% 16%  3%
    
[libx264 @ 04f617e0] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 04f617e0] ref P L0: 62.6%  9.1% 19.8%  8.5%
    
[libx264 @ 04f617e0] ref B L0: 85.3% 12.6%  2.1%
    
[libx264 @ 04f617e0] ref B L1: 92.4%  7.6%
    
[libx264 @ 04f617e0] kb/s:2243.97
    
[libvo_aacenc @ 0420e900] 1 frames left in the queue on closing

    I would like to update this command to change volume during concat and encode time :

    ffmpeg.exe -threads 8 -i "D:\Temporary0.mp4"  -i "D:\Temporary1.mp4"  -i "D:\Temporary2.mp4"  -filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a]  concat=n=3:v=1:a=1 [v] [a] " -map "[v]" -map "[a]"  -vcodec libx264 -b 2500000 -s 1920:1080 -af volume="volume=20dB:precision=double" -y D:\EditedVideo.mp4

    This command is executed but the audio stream is not altered with the +20db

    PS : If I do a simple encoding command like

    ffmpeg.exe -i source -vcodec libx264 -af volume="volume=20dB:precision=double" -y output

    Command work fine and audio stream is modified.

    So How can I Do to concat my videos and change audio volume at the same time ?

    Thanks

  • lavu/riscv : Revert d808070, removing AV_READ_TIME

    28 juillet 2024, par Nathan E. Egge
    lavu/riscv : Revert d808070, removing AV_READ_TIME

    The implementation of ff_read_time() for RISC-V uses rdtime which has
    
 precision on existing hardware too low (!) for benchmarking purposes.
    
Deleting this implementation falls back on clock_gettime() which was
    
 added as the default ff_read_time() implementation in 33e4cc9.
    
Below are metrics gathered on SpacemiT K1, before and after this commit :
    

    Before :
    

    $ tests/checkasm/checkasm —bench
    
benchmarking with native FFmpeg timers
    
nop : 0.0
    
checkasm : using random seed 3473665261
    
checkasm : bench runs 1024 (1 << 10)
    
RVI :
    
 - pixblockdsp.get_pixels                [OK]
    
 - vc1dsp.mspel_pixels                   [OK]
    
RVF :
    
 - audiodsp.audiodsp                     [OK]
    
checkasm : all 4 tests passed
    
audiodsp.vector_clipf_c : 1388.7
    
audiodsp.vector_clipf_rvf : 261.5
    
get_pixels_c : 2.0
    
get_pixels_rvi : 1.5
    
vc1dsp.put_vc1_mspel_pixels_tab[0][0]_c : 8.0
    
vc1dsp.put_vc1_mspel_pixels_tab[0][0]_rvi : 1.0
    
vc1dsp.put_vc1_mspel_pixels_tab[1][0]_c : 2.0
    
vc1dsp.put_vc1_mspel_pixels_tab[1][0]_rvi : 0.5
    

    After :
    

    $ tests/checkasm/checkasm —bench
    
benchmarking with native FFmpeg timers
    
nop : 56.4
    
checkasm : using random seed 1021411603
    
checkasm : bench runs 1024 (1 << 10)
    
RVI :
    
 - pixblockdsp.get_pixels                [OK]
    
 - vc1dsp.mspel_pixels                   [OK]
    
RVF :
    
 - audiodsp.audiodsp                     [OK]
    
checkasm : all 4 tests passed
    
audiodsp.vector_clipf_c : 23236.4
    
audiodsp.vector_clipf_rvf : 11038.4
    
get_pixels_c : 79.6
    
get_pixels_rvi : 48.4
    
vc1dsp.put_vc1_mspel_pixels_tab[0][0]_c : 329.6
    
vc1dsp.put_vc1_mspel_pixels_tab[0][0]_rvi : 38.1
    
vc1dsp.put_vc1_mspel_pixels_tab[1][0]_c : 89.9
    
vc1dsp.put_vc1_mspel_pixels_tab[1][0]_rvi : 17.1
    

    Signed-off-by : Rémi Denis-Courmont <remi@remlab.net>
    • [DH] libavutil/riscv/timer.h
    • [DH] libavutil/timer.h

  • avformat/mxfenc : fix stored/sampled/displayed width/height

    14 janvier 2023, par Jerome Martinez
    avformat/mxfenc : fix stored/sampled/displayed width/height

    According to MXF specs the Stored Rectangle corresponds to the data which is
    
passed to the compressor and received from the decompressor, so they should
    
contain the width / height extended to the macroblock boundary.
    

    In practice however width and height values rounded to the upper 16 multiples
    
are only seen when muxing MPEG formats. Therefore this patch changes stored
    
width and height values to unrounded for all non-MPEG formats, even macroblock
    
based ones.
    

    For DNXHD the specs (ST 2019-4) explicitly indicates to use 1080 for 1088p.
    
For ProRes the specs (RDD 44) only refer to to ST 377-1 without precision but
    
no known commercial implementations are using rounded values.
    
DV is not using 16x16 macroblocks, so 16 rounding makes no sense.
    

    The patch also fixes Sampled Width / Display Width to use unrounded values.
    

    Signed-off-by : Marton Balint <cus@passwd.hu>
    • [DH] libavformat/mxfenc.c
    • [DH] tests/fate/lavf-container.mak
    • [DH] tests/ref/lavf/mxf_dvcpro100
    • [DH] tests/ref/lavf/mxf_opatom

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