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• Additional fix to last-page handling, this time in initial bisection ;

  18 juin 2014, par Monty

  Additional fix to last-page handling, this time in initial bisection ;
  the code had gotten too cavalier about directly munging the vf->offset
  file pointer as well as using it as an implicit argument to
  _get_prev_page and _get_prev_page_serial.  The fact it was being used
  as an argument and a side effect caused a necessary seek to get missed
  when the last page of a link was non-vorbis.
  Fix : Clean up the overloading, and be explicit about where we’re
  
  beginning prev_page reads.
  git-svn-id : http://svn.xiph.org/trunk/vorbis@19165 0101bb08-14d6-0310-b084-bc0e0c8e3800
  

  • [DH] lib/vorbisfile.c

• Overlay a video on another video at specific time with FFmpeg

  4 janvier 2019, par Tina J

  I am trying to overlay a video with another video. I followed the original command OP posted here. And it works, but it overlays the video from time 0 :

  ffmpeg -i 720480.mp4 -i sdbug.mov -filter_complex "[0:0][1:0]overlay[out]" -shortest -map [out] -map 0:1 -pix_fmt yuv420p -c:a copy -c:v libx264 -crf 18  new.mp4 

  I tried the correct answer to specify a time, but it is not working for me : 1) the overlay starts at around second 12, and 2) video is not played after the overlay is finished.

  ffmpeg -i 720480.mp4 -i sdbug.mov -filter_complex "[1:v]setpts=PTS+10/TB[a]; [0:v][a]overlay=enable=gte(t\,5):shortest=1[out]" -map [out] -map 0:a -c:v libx264 -crf 18 -pix_fmt yuv420p -c:a copy new.mp4

  Anything changed recently on FFmpeg ?! Why isn’t it working ?

  Here is the output of this command (it finishes very fast) :

  ffmpeg version N-92906-g54109b1d14 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 8.2.1 (GCC) 20181201
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  
    libavutil      56. 25.100 / 56. 25.100
  
    libavcodec     58. 43.100 / 58. 43.100
  
    libavformat    58. 25.100 / 58. 25.100
  
    libavdevice    58.  6.101 / 58.  6.101
  
    libavfilter     7. 46.101 /  7. 46.101
  
    libswscale      5.  4.100 /  5.  4.100
  
    libswresample   3.  4.100 /  3.  4.100
  
    libpostproc    55.  4.100 / 55.  4.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '720480.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 2018-07-26T09:23:16.000000Z
  
    Duration: 00:01:50.17, start: 0.000000, bitrate: 3181 kb/s
  
      Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x480 [SAR 8:9 DAR 4:3], 2785 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : VideoHandler
  
        timecode        : 00:59:55:12
  
      Stream #0:1: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : SoundHandler
  
      Stream #0:2: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : SoundHandler
  
      Stream #0:3: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : SoundHandler
  
      Stream #0:4: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : SoundHandler
  
      Stream #0:5: Data: none (tmcd / 0x64636D74) (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : TimecodeMediaHandler
  
        timecode        : 00:59:55:12
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'sdbug.mov':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      creation_time   : 2018-08-29T14:50:13.000000Z
  
    Duration: 00:00:10.01, start: 0.000000, bitrate: 10504 kb/s
  
      Stream #1:0(eng): Video: qtrle (rle  / 0x20656C72), bgra(progressive), 720x486, 9666 kb/s, SAR 109:120 DAR 109:81, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
  
      Metadata:
  
        creation_time   : 2018-08-29T14:50:13.000000Z
  
        handler_name    : Apple Video Media Handler
  
        encoder         : Animation
  
        timecode        : 00:00:00;00
  
      Stream #1:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-08-29T14:50:13.000000Z
  
        handler_name    : Time Code Media Handler
  
        timecode        : 00:00:00;00
  
  Stream mapping:
  
    Stream #0:0 (h264) -> overlay:main
  
    Stream #1:0 (qtrle) -> setpts
  
    overlay -> Stream #0:0 (libx264)
  
    Stream #0:1 -> #0:1 (copy)
  
    Stream #0:2 -> #0:2 (copy)
  
    Stream #0:3 -> #0:3 (copy)
  
    Stream #0:4 -> #0:4 (copy)
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 000002b902a3f480] using SAR=8/9
  
  [libx264 @ 000002b902a3f480] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 000002b902a3f480] profile High, level 3.0, 4:2:0, 8-bit
  
  [libx264 @ 000002b902a3f480] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'new.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.25.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        encoder         : Lavc58.43.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : SoundHandler
  
      Stream #0:2: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : SoundHandler
  
      Stream #0:3: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : SoundHandler
  
      Stream #0:4: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-07-26T09:23:16.000000Z
  
        handler_name    : SoundHandler
  
  frame=  599 fps= 92 q=-1.0 Lsize=   11556kB time=00:01:50.01 bitrate= 860.5kbits/s speed=16.8x
  
  video:6173kB audio:5288kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.828358%
  
  [libx264 @ 000002b902a3f480] frame I:8     Avg QP:13.24  size: 44134
  
  [libx264 @ 000002b902a3f480] frame P:174   Avg QP:18.62  size: 20916
  
  [libx264 @ 000002b902a3f480] frame B:417   Avg QP:21.31  size:  5583
  
  [libx264 @ 000002b902a3f480] consecutive B-frames:  6.0%  1.7%  5.5% 86.8%
  
  [libx264 @ 000002b902a3f480] mb I  I16..4: 15.9% 58.9% 25.2%
  
  [libx264 @ 000002b902a3f480] mb P  I16..4:  1.4% 13.6%  4.2%  P16..4: 36.6% 22.8% 12.3%  0.0%  0.0%    skip: 9.0%
  
  [libx264 @ 000002b902a3f480] mb B  I16..4:  0.1%  0.9%  0.3%  B16..8: 46.4% 10.6%  2.9%  direct: 5.5%  skip:33.3%  L0:53.4% L1:36.9% BI: 9.7%
  
  [libx264 @ 000002b902a3f480] 8x8 transform intra:68.5% inter:65.1%
  
  [libx264 @ 000002b902a3f480] coded y,uvDC,uvAC intra: 77.5% 89.5% 77.2% inter: 26.8% 48.1% 10.1%
  
  [libx264 @ 000002b902a3f480] i16 v,h,dc,p: 50% 13% 13% 23%
  
  [libx264 @ 000002b902a3f480] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 12% 17%  6%  8% 10%  7%  9%  7%
  
  [libx264 @ 000002b902a3f480] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 13% 10%  7% 12% 11%  9%  9%  7%
  
  [libx264 @ 000002b902a3f480] i8c dc,h,v,p: 51% 15% 24% 10%
  
  [libx264 @ 000002b902a3f480] Weighted P-Frames: Y:5.2% UV:2.9%
  
  [libx264 @ 000002b902a3f480] ref P L0: 60.1% 19.6% 15.8%  4.4%  0.1%
  
  [libx264 @ 000002b902a3f480] ref B L0: 91.6%  7.3%  1.1%
  
  [libx264 @ 000002b902a3f480] ref B L1: 97.2%  2.8%
  
  [libx264 @ 000002b902a3f480] kb/s:2529.97

• Using batch process to encode multiple files one at a time with ffmpeg

  10 octobre 2014, par Tom Drake

  Total beginner here, likely asking for help on something (hopefully) very easy to implement.

  I have a drop folder set up to trigger a batch process that will encode any videos contained therein to 5 different formats using FFMPEG. It also creates a text file containing the files name which I then use in a separate php/api process to upload the videos to the internet.

  The process works perfectly when just the one video is dropped into the drop folder. However, as soon as there are two or more then the process comes unstuck.

  Here’s an example of one of the ffmpeg scripts the batch file runs :

  for %%a in ("C:\live\dropfolder\transcode\*.*") do ffmpeg\ffmpeg -i "%%a" (encoding settings) "C:\live\dropfolder\output\%%~na.mp4"
  
  pause
  
  for %%g in (C:\live\dropfolder\output\*.mp4) do echo %%~nxg > C:\live\dropfolder\filename\filename_format.txt

  So when there are 2 or more files, the filename that gets generated by that echo might be for File A, while the transcoding session might have been for File B.

  Ideally I’d like to have the whole process finish transcoding the first video - including generating the text files for each format - before returning to the beginning of the process for the next video in the drop folder.

  How do I achieve this ? Any suggestions would be greatly appreciated.

  Thanks !

  Tom