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• PHP : shell_exec() ; not working identical to cmd ? [WIN10 CMD]

  24 février 2021, par hydra-lua

  $MergeCommand = "C:\\Users\\Admin\\Documents\\ffmpeg-2021-02-20-git-51a9f487ae-full_build\\bin\\ffmpeg -i \"" . $path . $videoname . "\" -i \"" . $path . $audioname . "\" -c:v copy -c:a aac \"" . $path . $filename . "FINAL.mp4\"";
shell_exec($MergeCommand);
echo($MergeCommand);


  


  Operating System : Windows 10


  
Sorry for the incredibly long and painful line I've provided.
  
From testing, I know that my code reaches the line shell_exec($MergeCommand);.
  
It even echoes the value of $MergeCommand afterwards correctly.
  

  
The problem is, as soon as it tries to execute $MergeCommand, nothing happens. It just seems to be going
  
into the next line. What's supposed to happen, is that it merges a video file with an audio file.
  
There is no output (tried echoing the result of it) and not any error message either.
  
When using exec($MergeCommand, $output, $retvalue); to find out the return value, it returns 1.
  
Though, if I copy the exact line that echo($MergeCommand); prints out, open a cmd, paste
  
it in there and run it, it does exactly what It's supposed to do.

  
Now I wonder, why does the same command work in a regular cmd, while it doesn't work when running
  
it via shell_exec(); or exec(); ???
  
It's not like shell_exec(); doesn't work at all, I've come to the conclusion that it specifically
  
happens when running that command. For example, shell_exec("echo hello world"); works
  
perfectly fine.

  


• Even after converting the Audio from Mono to Stereo in ffmpeg the video still has No sound Unless

  19 février 2021, par Mariah242

  I Change the audio Mode in VLC from Stereo to Mono then the Audio will play Normal

  


  I used ffmpeg to convert the audio to Stereo using this

  


  ffmpeg -i bokan_test_1.mkv -map 0 -map -0:s? -c:v copy -c:a ac3 -ac 2 -b:a 640k "E:\Test\output.S01E05.mkv"


  


  I even used Handbrake still No audio in VLC unless I change the audio mode to Mono

  


  Edit :
full log when running the ffmpeg command above

  


  E:\test audio>ffmpeg -i bokan_test_1.mkv -map 0 -map -0:s? -c:v copy -c:a ac3 -ac 2 -b:a 640k "E:\Test\output.S01E06.mkv"
ffmpeg version 4.3.1-2021-01-01-essentials_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-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --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-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
  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, matroska,webm, from 'bokan_test_1.mkv':
  Metadata:
    encoder         : libebml v1.3.0 + libmatroska v1.4.0
    creation_time   : 2015-07-27T22:38:36.000000Z
  Duration: 00:20:01.02, start: 0.000000, bitrate: 3497 kb/s
    Stream #0:0: Video: h264 (High), yuv420p(progressive), 1440x1080, SAR 1:1 DAR 4:3, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
    Stream #0:1(ara): Audio: aac (HE-AAC), 44100 Hz, stereo, fltp (default)
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (aac (native) -> ac3 (native))
Press [q] to stop, [?] for help
Output #0, matroska, to 'E:\Azmi\output.S01E06.mkv':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(progressive), 1440x1080 [SAR 1:1 DAR 4:3], q=2-31, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc (default)
    Stream #0:1(ara): Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, fltp, 640 kb/s (default)
    Metadata:
      encoder         : Lavc58.91.100 ac3
frame=35994 fps=5263 q=-1.0 Lsize=  595496kB time=00:20:01.03 bitrate=4061.8kbits/s speed= 176x
video:501161kB audio:93829kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.085007%


  


• How to use FFMPEG with Nvidia Acceleration (Nvenc) to hardcode subtitles

  21 février 2021, par Ibraheem Nofal

  So I'm trying to use Nvenc to accelerate video encoding. The aim is to have 1 input video file and 1 input subtitle, and to get multiple outputs at different resolutions with subtitles hardcoded or burned into the video. I've tried multiple approaches but can't figure out how to do it.

  


  Here's the command that I'm currently using :

  


  ffmpeg -hwaccel cuvid -i 3030025890-TEST.mp4 -i output_ar.srt  -filter_complex "[0:v]scale_npp=1920:1080, hwdownload,format=nv12[base], [base]subtitles=output_ar.srt[marked]" -map "[marked]" -c:v h264_nvenc -map 0:v:0 -map 0:a:0 -g 50 -b:v 5M -maxrate 5.5M -minrate 4M -bufsize 5M -preset fast 1080_output.mp4


  


  and here's the output :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '3030025890-TEST.mp4':
  Metadata:
    major_brand     : M4V 
    minor_version   : 1
    compatible_brands: isomavc1mp42
    creation_time   : 2021-01-05T13:45:58.000000Z
  Duration: 00:45:04.28, start: 0.000000, bitrate: 5574 kb/s
    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 5000 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2021-01-05T13:45:58.000000Z
      handler_name    : ETI ISO Video Media Handler
      encoder         : Elemental H.264
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
    Metadata:
      creation_time   : 2021-01-05T13:45:58.000000Z
      handler_name    : ETI ISO Audio Media Handler
    Stream #0:2(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
    Metadata:
      creation_time   : 2021-01-05T13:45:58.000000Z
      handler_name    : ETI ISO Audio Media Handler
    Stream #0:3(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
    Metadata:
      creation_time   : 2021-01-05T13:45:58.000000Z
      handler_name    : ETI ISO Audio Media Handler
    Stream #0:4(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
    Metadata:
      creation_time   : 2021-01-05T13:45:58.000000Z
      handler_name    : ETI ISO Audio Media Handler
    Stream #0:5(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
    Metadata:
      creation_time   : 2021-01-05T13:45:58.000000Z
      handler_name    : ETI ISO Audio Media Handler
    Stream #0:6(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
    Metadata:
      creation_time   : 2021-01-05T13:45:58.000000Z
      handler_name    : ETI ISO Audio Media Handler
Input #1, srt, from 'output_ar.srt':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Subtitle: subrip
[Parsed_subtitles_3 @ 0x5601070b1dc0] Shaper: FriBidi 0.19.7 (SIMPLE)
Fontconfig error: Cannot load default config file
[Parsed_subtitles_3 @ 0x5601070b1dc0] No usable fontconfig configuration file found, using fallback.
Fontconfig error: Cannot load default config file
[Parsed_subtitles_3 @ 0x5601070b1dc0] Using font provider fontconfig
Stream mapping:
  Stream #0:0 (h264) -> scale_npp (graph 0)
  subtitles (graph 0) -> Stream #0:0 (h264_nvenc)
  Stream #0:0 -> #0:1 (h264 (native) -> h264 (h264_nvenc))
  Stream #0:1 -> #0:2 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[h264 @ 0x56010792f980] Error creating a NVDEC decoder: 1
[h264 @ 0x56010792f980] Failed setup for format cuda: hwaccel initialisation returned error.
[Parsed_subtitles_3 @ 0x560107364cc0] Shaper: FriBidi 0.19.7 (SIMPLE)
Fontconfig error: Cannot load default config file
[Parsed_subtitles_3 @ 0x560107364cc0] No usable fontconfig configuration file found, using fallback.
Fontconfig error: Cannot load default config file
[Parsed_subtitles_3 @ 0x560107364cc0] Using font provider fontconfig
Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0
[aac @ 0x56010734d400] Qavg: 65536.000
[aac @ 0x56010734d400] 2 frames left in the queue on closing
Conversion failed!


  


  Edit : Made some progress. I now no longer get an error, but upon viewing the output, there's no subtitles burned in.
Command :

  


  ffmpeg -hwaccel cuvid -c:v h264_cuvid -i 3030025890-TEST.mp4  -c:v h264_nvenc -map 0:v:0 -map 0:a:0 -g 50 -b:v 5M -maxrate 5.5M -minrate 4M -bufsize 5M -vf "scale_npp=1920:1080, hwdownload, format=nv12, subtitles=output_ar.srt, hwupload" -preset fast 1080_output.mp4