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• FFMPEG Command working ok from terminal but not when launched as a process

  16 juin 2023, par Pit Digger

  I am launching an FFMPEG process from C++ , the command is workign fine from command line, but gives error when laucnhed from code. What could cause this ?

  


  [AVFilterGraph @ 0x3cfadc0] Error parsing filterchain '"[0:v]split=3[v1][v2][v3] ;[v1]copy[v1out] ;[v2]scale=w=1280:h=720[v2out] ;[v3]scale=w=640:h=360[v3out]"'

  


  AVFilterGraph @ 0x3cfadc0] Trailing garbage after a filter : split=3[v1][v2][v3] ;[v1]copy[v1out] ;[v2]scale=w=1280:h=720[v2out] ;[v3]scale=w=640:h=360[v3out]"

  


  Command :

  


  ffmpeg -re -i input.mp4 -c copy -filter_complex "[0:v]split=3[v1][v2][v3] ;[v1]copy[v1out] ;[v2]scale=w=1280:h=720[v2out] ;[v3]scale=w=640:h=360[v3out]" -map [v1out] -c:v:0 libx264 -x264-params "nal-hrd=cbr:force-cfr=1" -b:v:0 1M -maxrate:v:0 2M -minrate:v:0 2M -bufsize:v:0 2M -preset fast -g 48 -sc_threshold 0 -keyint_min 48 -map [v2out] -c:v:1 libx264 -x264-params 'nal-hrd=cbr:force-cfr=1' -b:v:1 1M -maxrate:v:1 1M -minrate:v:1 1M -bufsize:v:1 1M -preset fast -g 48 -sc_threshold 0 -keyint_min 48 -map [v3out] -c:v:2 libx264 -x264-params 'nal-hrd=cbr:force-cfr=1' -b:v:2 500K -maxrate:v:2 500K -minrate:v:2 500K -bufsize:v:2 500K -preset fast -g 48 -sc_threshold 0 -keyint_min 48 -map a:0 -c:a:0 aac -b:a:0 96k -ac 2 -map a:0 -c:a:1 aac -b:a:1 96k -ac 2 -map a:0 -c:a:2 aac -b:a:2 48k -ac 2 -avoid_negative_ts 1 -f hls -hls_time 6 -hls_list_size 15 -hls_flags independent_segments -hls_segment_type mpegts -hls_segment_filename /output/stream_%v_data%02d.ts -master_pl_name index.m3u8 -var_stream_map 'v:0,a:0 v:1,a:1 v:2,a:2' /output/stream_%v.m3u8

  


• PHP cannot run a python script that uses ffmpeg (when the python script runs in terminal)

  10 février, par dr3kiki

  In my website, a user uploads an audio file that gets mixed by a python script. The python script uses ffmpeg to translate the files, however it doesn't work when I try executing via php due to ffmpeg, I get this error

  


  usr/local/lib/python3.9/site-packages/pydub/utils.py:170 : RuntimeWarning : Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work")

  


  The python script can run (with no errors) in the Linux terminal and ffmpeg can run separately also in the terminal (in the website's directory).

  


  I have tried linking the environment with php with putenv("/usr/bin/ffmpeg") which had no luck, as well as linking to the usr/local/lib/python3.9/site-packages/ directory in the same way, also no luck.

  


• Terminal : How to extract image-based subtitles from mp4 ?

  4 août 2022, par DevonDahon

  How to extract image-based subtitles from mp4 video ?

  


  $ ffmpeg -i myvideo.mp4
ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 13.1.6 (clang-1316.0.21.2.5)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/5.0.1_3 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'myvideo.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: mp42iso2avc1mp41
    creation_time   : 2022-08-03T21:58:07.000000Z
    encoder         : HandBrake 1.5.1 2022011000
  Duration: 00:11:05.40, start: 0.000000, bitrate: 1635 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt470bg/bt470bg, progressive), 712x576 [SAR 16:15 DAR 178:135], 1454 kb/s, 25 fps, 25 tbr, 90k tbn (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](bre): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Stereo
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](bre): Subtitle: dvd_subtitle (mp4s / 0x7334706D), 720x576, 6 kb/s (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Brezhoneg
  Stream #0:3[0x4](fra): Subtitle: dvd_subtitle (mp4s / 0x7334706D), 720x576, 6 kb/s
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Français
At least one output file must be specified