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• PHP and FFmpeg : works on terminal but ffmpeg error when in shell_exec

  25 janvier 2014, par user2128983

  I'm in front of a problem I can't solve !

  I try to convert videos using the ffmpeg tool. When I paste the command on the server terminal (ssh root), it works fine. But, when I try in my PHP script using shell_exec, it returns the error "Error while opening encoder ...".

  Here is the command I use :

  ffmpeg -y -i VIDEOIN.mov -preset medium -strict -2 -c:v libx264 -b:v 1000k -pass 1 -f mp4 VIDEOOUT.mp4 null 1>logfile.txt 2>&1 &

  And my PHP script :

  $dir = 'videos/'.$uuid;
  
  $out = $dir.'video.mp4';
  
  $log = $dir.'transcoding_log.txt';
  
  $preset = 'medium';
  
  $bitrate = 1000;
  
  
  
  $cmd = "ffmpeg -y -i ".$in." -preset ".$preset." -strict -2 -c:v libx264 -b:v ".$bitrate."k -pass 1 -f mp4 ".$out." null 1>".$log." 2>&1 &";
  
  @file_put_contents($dir.'cmd.log', $cmd); // to debug
  
  shell_exec($cmd);

  Here is the log file created in the PHP script :

  ffmpeg version 1.0.8 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Sep 12 2013 11:57:09 with gcc 4.7 (Debian 4.7.2-5)
  
  configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security ' --extra-ldflags='-Wl,-z,relro' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/x86_64-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libfdk-aac --enable-libdc1394 --disable-altivec --dis  libavutil      51. 73.101 / 51. 73.101
  
    libavcodec     54. 59.100 / 54. 59.100
  
    libavformat    54. 29.104 / 54. 29.104
  
    libavdevice    54.  2.101 / 54.  2.101
  
    libavfilter     3. 17.100 /  3. 17.100
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, matroska,webm, from 'videos/18352678af96ecb5/origin.webm':
  
    Metadata:
  
      creation_time   : 2010-05-20 08:21:12
  
    Duration: 00:00:32.48, start: 0.000000, bitrate: 533 kb/s
  
      Stream #0:0(eng): Video: vp8, yuv420p, 640x360, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
  
      Stream #0:1(eng): Audio: vorbis, 44100 Hz, mono, s16 (default)
  
  [libx264 @ 0x19c05a0] using SAR=1/1
  
  [libx264 @ 0x19c05a0] using cpu capabilities: MMX2 SSE2Fast SSEMisalign LZCNT
  
  [libx264 @ 0x19c05a0] ratecontrol_init: can't open stats file
  
  Output #0, mp4, to 'videos/18352678af96ecb5/video.mp4':
  
      Stream #0:0(eng): Video: h264, yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, pass 1,     90k tbn, 25 tbc (default)
  
      Stream #0:1(eng): Audio: none, 44100 Hz, mono, s16, 128 kb/s (default)
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (vp8 -> libx264)
  
    Stream #0:1 -> #0:1 (vorbis -> libfaac)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as     bit_rate, rate, width or height

  EDIT 1 :

  I compiled ffmpeg with the latest revision but the problem still occurs.

• FFMPEG : Terminal : Output name included original file ending ".mov" in output title : How to remove [duplicate]

  3 mai 2022, par Gio

  I successfully outputted the desired effect for my FFMPEG command. I had been removing the audio from my videos with this line of code :

  


   for i in *.mov; do ffmpeg -i $i -c:v copy -an $i-noaudio.mp4; done


  


  The output results as "myInputvideo.mov-noaudio.mp4"

  


  How might I get this to output without the ".mov" in the title ?
And how might I move all these outputs into a new directory entitled "no-audio"

  


  Thank you !

  


• Google Colab Runtime Error please install ffmpeg (version 4.2 is currently supported) andbuild torchvision from source

  4 juillet 2021, par Iman

  I'm using Google Colab to write a program using torch vision to extract frames from an mp4 video in my google drive. Thus far, I haven't wrote the full code yet but have been experimenting with torch vision.io library. Upon running the code, I get the following errors.

  


  Mounted at /content/gdrive&#xA;---------------------------------------------------------------------------&#xA;RuntimeError                              Traceback (most recent call last)&#xA; in <module>()&#xA;      6 &#xA;      7 video_path = "/content/drive/MyDrive/Training-Data-Videos/MASKED/00_MASKED_0_0.mp4"&#xA;----> 8 reader = torchvision.io.VideoReader(video_path, "video")&#xA;      9 reader.seek(2.0)&#xA;     10 frame = next(reader)&#xA;&#xA;/usr/local/lib/python3.7/dist-packages/torchvision/io/__init__.py in __init__(self, path, stream)&#xA;    106                 &#x2B; "to enable video_reader support, please install "&#xA;    107                 &#x2B; "ffmpeg (version 4.2 is currently supported) and"&#xA;--> 108                 &#x2B; "build torchvision from source."&#xA;    109             )&#xA;    110         self._c = torch.classes.torchvision.Video(path, stream)&#xA;&#xA;RuntimeError: Not compiled with video_reader support, to enable video_reader support, please install ffmpeg (version 4.2 is currently supported) andbuild torchvision from source.&#xA;&#xA;</module>

  


  The code that I have written in the notebook so far is the following :

  


  import os 
import torchvision 
from google.colab import drive
drive.mount('/content/gdrive', force_remount=True)

video_path = "/content/drive/MyDrive/Training-Data-Videos/MASKED/00_MASKED_0_0.mp4"
reader = torchvision.io.VideoReader(video_path, "video")
reader.seek(2.0)
frame = next(reader)
print (frame)



  


  To solve the problem, I tried to install ffmpeg on colab as this post says but it did not work. Can someone tell me what is the error ?