Recherche avancée

Sur d’autres sites (3521)

• Ffmpeg rounds seconds instead of using the milliseconds part

  10 mai 2021, par NourElDineA

  I tried to cut a video using the following command :

  


  ffmpeg -i input.mp4 -ss 00:00:00 -to 00:00:06.600 output.mp4


  


  When I run the command ffmpeg rounds up and the output video is 7 seconds instead of 6.6 seconds.
I would like to know if there is a way to cut the video precisely where I tell it to.

  


  Here is the log file content :

  


  ffmpeg version 4.3.1-2021-01-01-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
  Duration: 00:00:10.52, start: 0.000000, bitrate: 1070 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x720 [SAR 1:1 DAR 4:3], 935 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
    Metadata:
      handler_name    : Telestream Inc. Dib Library - ReleaseVantage 2014.59.138974
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      handler_name    : Telestream Inc. Dib Library - ReleaseVantage 2014.59.138974
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
[libx264 @ 0000015de0911400] using SAR=1/1
[libx264 @ 0000015de0911400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000015de0911400] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0000015de0911400] 264 - core 161 r3027 4121277 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - 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=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 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, mp4, to 'out3.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 960x720 [SAR 1:1 DAR 4:3], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
    Metadata:
      handler_name    : Telestream Inc. Dib Library - ReleaseVantage 2014.59.138974
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : Telestream Inc. Dib Library - ReleaseVantage 2014.59.138974
      encoder         : Lavc58.91.100 aac
frame=  100 fps=0.0 q=29.0 size=       0kB time=00:00:03.56 bitrate=   0.1kbits/s speed=6.78x    
frame=  172 fps=167 q=29.0 size=     256kB time=00:00:05.95 bitrate= 352.4kbits/s speed=5.77x    
frame=  198 fps=126 q=-1.0 Lsize=     818kB time=00:00:06.61 bitrate=1013.6kbits/s speed=4.22x    
video:709kB audio:100kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.054347%
[libx264 @ 0000015de0911400] frame I:1     Avg QP: 3.25  size:   178
[libx264 @ 0000015de0911400] frame P:84    Avg QP:18.55  size:  6826
[libx264 @ 0000015de0911400] frame B:113   Avg QP:20.94  size:  1347
[libx264 @ 0000015de0911400] consecutive B-frames:  1.5% 66.7%  1.5% 30.3%
[libx264 @ 0000015de0911400] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0000015de0911400] mb P  I16..4:  5.8%  6.9%  0.6%  P16..4: 40.1%  4.8%  3.4%  0.0%  0.0%    skip:38.4%
[libx264 @ 0000015de0911400] mb B  I16..4:  0.1%  0.3%  0.0%  B16..8: 12.1%  0.8%  0.1%  direct: 6.5%  skip:80.1%  L0:33.9% L1:60.4% BI: 5.7%
[libx264 @ 0000015de0911400] 8x8 transform intra:48.3% inter:70.6%
[libx264 @ 0000015de0911400] coded y,uvDC,uvAC intra: 13.6% 73.4% 33.1% inter: 4.1% 20.1% 0.5%
[libx264 @ 0000015de0911400] i16 v,h,dc,p: 92%  4%  3%  2%
[libx264 @ 0000015de0911400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13%  7% 65%  2%  3%  3%  3%  3%  2%
[libx264 @ 0000015de0911400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 16% 22%  5%  7%  7%  7%  6%  3%
[libx264 @ 0000015de0911400] i8c dc,h,v,p: 54% 20% 23%  4%
[libx264 @ 0000015de0911400] Weighted P-Frames: Y:6.0% UV:6.0%
[libx264 @ 0000015de0911400] ref P L0: 69.2%  5.3% 17.7%  7.7%  0.1%
[libx264 @ 0000015de0911400] ref B L0: 92.8%  6.2%  1.0%
[libx264 @ 0000015de0911400] ref B L1: 99.5%  0.5%
[libx264 @ 0000015de0911400] kb/s:878.78
[aac @ 0000015de0914080] Qavg: 6573.620


  


  The output file is 7 seconds long which means ffmpeg rounded up my 6.60 to 7 and I need it to cut exactly at 00:00:06.60

  


• webm video - it can not be copy to cut a correct time part for ffmpeg command(without re-encode) [closed]

  15 mars 2024, par DanielHsu

  Command Goal :

  


  

  1. fast copy video's part

  


  2. no re-encode with libvpx

  


  


  Linux command below :
ffmpeg -ss 00:01:00 -to 00:02:00 -i input.webm -c copy output.webm

  


  command's process details :

  


  ffmpeg version 6.1.1 Copyright (c) 2000-2023 the FFmpeg developers   built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)   configuration:
--enable-libvpx   libavutil      58. 29.100 / 58. 29.100   libavcodec     60. 31.102 / 60. 31.102   libavformat    60. 16.100 / 60. 16.100   libavdevice    60.  3.100 / 60.  3.100   libavfilter     9. 12.100 / 
9. 12.100   libswscale      7.  5.100 /  7.  5.100   libswresample   4. 12.100 /  4. 12.100 Input #0, matroska,webm, from 'input.webm':   Metadata:
    title           : FFmpeg
    ENCODER         : Lavf58.29.100   Duration: 00:06:04.43, start: 0.000000, bitrate: 2487 kb/s   Stream #0:0: Video: vp8, yuv420p(tv, bt470bg/unknown/unknown, progressive), 1280x720, SAR 1:1 DAR 16:9, 1k tbr, 1k tbn (default)
    Metadata:
      DURATION        : 00:06:04.432000000 Output #0, webm, to 'output.webm':   Metadata:
    title           : FFmpeg
    encoder         : Lavf60.16.100   Stream #0:0: Video: vp8, yuv420p(tv, bt470bg/unknown/unknown, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 1k tbr, 1k tbn (default)
    Metadata:
      DURATION        : 00:06:04.432000000 Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help [out#0/webm @ 0x5609ee9bb840] video:35912kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.069370% size=   35937kB time=00:00:59.96 bitrate=4909.2kbits/s speed= 211x


  


  command usage's result :
output.webm always start from input.webm's 00:00:00 to end input.webm's 00:01:00
(it should be start from input.webm's 00:01:00 to end input.webm's 00:02:00 )

  


  input.webm format details from mediainfo tool :

  


  


  General Count : 331 Count of stream
of this kind : 1 Kind of stream
  
 : General Kind of stream : General Stream
identifier : 0 Count of video streams
  
 : 1 Video_Format_List : VP8
Video_Format_WithHint_List : VP8 Codecs Video
  
 : VP8 Complete name :
pure_film/65ea641a4075c92236151349_video.webm Folder name
  
 : pure_film File name extension :
65ea641a4075c92236151349_video.webm File name
  
 : 65ea641a4075c92236151349_video File extension
  
 : webm Format : WebM Format
  
 : WebM Format/Url :
http://www.webmproject.org/ Format/Extensions usually used :
webm Commercial name : WebM Format version
  
 : Version 2 Internet media type : video/webm File
size : 113301943 File size
  
 : 108 MiB File size : 108 MiB File size
 : 108 MiB File size : 108 MiB File size
 : 108.1 MiB Duration : 364432 Duration
 : 6 min 4 s Duration : 6 min 4 s 432
ms Duration : 6 min 4 s Duration
  
 : 00:06:04.432 Duration : 00:06:04.432
Overall bit rate : 2487201 Overall bit rate
  
 : 2 487 kb/s Stream size : 4801069 Stream
size : 4.58 MiB (4%) Stream size
  
 : 5 MiB Stream size : 4.6 MiB Stream size
 : 4.58 MiB Stream size : 4.579 MiB Stream
size : 4.58 MiB (4%) Proportion of this
stream : 0.04237 IsStreamable
  
 : Yes Title : FFmpeg Movie name
  
 : FFmpeg File last modification date : UTC 2024-03-08
01:41:47 File last modification date (local) : 2024-03-08
09:41:47 Writing application : Lavf58.29.100
Writing application : Lavf58.29.100 Writing
library : Lavf58.29.100 Writing library
  
 : Lavf58.29.100

  


  Video Count : 377 Count of stream
of this kind : 1 Kind of stream
  
 : Video Kind of stream : Video Stream
identifier : 0 StreamOrder
  
 : 0 ID : 1 ID
  
 : 1 Unique ID : 1 Format
  
 : VP8 Format : VP8 Format/Url
  
 : http://www.webmproject.org/ Commercial name
  
 : VP8 Codec ID : V_VP8 Codec ID/Url
  
 : http://www.webmproject.org/ Duration
  
 : 364432.000000 Duration : 6 min 4 s
Duration : 6 min 4 s 432 ms Duration
  
 : 6 min 4 s Duration : 00:06:04.432
Duration : 00:06:04.432 Bit rate
  
 : 2381808 Bit rate : 2 382 kb/s Width
 : 1280 Width : 1 280 pixels Height
 : 720 Height : 720 pixels Pixel
aspect ratio : 1.000 Display aspect ratio
  
 : 1.778 Display aspect ratio : 16:9 Frame rate
mode : VFR Frame rate mode
  
 : Variable Color space : YUV Compression
mode : Lossy Compression mode
  
 : Lossy Delay : 0 Delay
  
 : 00:00:00.000 Delay, origin : Container
Delay, origin : Container Stream size
  
 : 108500874 Stream size : 103 MiB (96%)
Stream size : 103 MiB Stream size
  
 : 103 MiB Stream size : 103 MiB Stream
size : 103.5 MiB Stream size
  
 : 103 MiB (96%) Proportion of this stream : 0.95763
Default : Yes Default
  
 : Yes Forced : No Forced
  
 : No colour_description_present : Yes
colour_description_present_Source : Container Color range
  
 : Limited colour_range_Source : Container Matrix
coefficients : BT.470 System B/G
matrix_coefficients_Source : Container

  


  


  How to make the output.webm be in correct time range(00:01:00 00:02:00) ????

  


• lavc/exif : Make EXIF IFD decoding part of private API/ABI.

  26 mars 2014, par Thilo Borgmann

  lavc/exif : Make EXIF IFD decoding part of private API/ABI.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/exif.c
  • [DH] libavcodec/exif.h
  • [DH] libavcodec/mjpegdec.c
  • [DH] libavcodec/version.h
  • [DH] libavcodec/webp.c