Recherche avancée

Sur d’autres sites (6222)

• Mingw-w64 - printf does not work

  27 décembre 2013, par Gosha U.

  First I wanted to modificate ffplay according to my requirments. Then I noticed that original ffplay from my build can't play some video files, but it didn't write any message to console. Then I noticed that ffmpeg also don't write any usage message when I run it without params. But it works. If I run it from terminal it's like running asynchronously ! The terminal just shows next row. I mean it asks for a next command. But the ffmpeg process is visible in task manager and it writes the output video file what I had requested !

  I created following souce file. I have modified the Makefile. So it have built the exe-file works just the same way. I have no idea how it can be.

  #include 
  
  #include "cmdutils.h"
  
  
  
  const char program_name[] = "hello";
  
  const int program_birth_year = 2013;
  
  
  
  void show_help_default(const char *opt, const char *arg)
  
  {
  
      printf("zxcvbnm\n");
  
  }
  
  
  
  int main(int argc, char **argv)
  
  {
  
      printf("1234567890\n");
  
      return 0;
  
  }

  And after that I created real hello world app with MinGW-w64 and qmake without eny extra libs. And its printf does not work.

  I want to prevent this behavior.

  I want to make printf working in traditional manner.

  How I build FFmpeg :

  PKG_CONFIG_PATH=/home/developer/workspace/MinGW32fs/lib/pkgconfig/ \
  
  SDL_CONFIG=/home/developer/workspace/MinGW32fs/bin/sdl-config \
  
  ./configure \
  
    --prefix=/home/developer/workspace/MinGW32fs \
  
    --extra-ldflags="-L/home/developer/workspace/MinGW32fs/lib" \
  
    --extra-cflags="-I/home/developer/workspace/MinGW32fs/include" \
  
    --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32-  \
  
    --pkg-config=pkg-config   --enable-libtheora --enable-libvorbis --enable-libvpx \
  
    --enable-outdev=sdl --enable-shared --disable-static \
  
    --disable-doc --disable-manpages --disable-podpages
  
  
  
  make

• ffmpeg - escaping single quotes doesn't work [duplicate]

  18 septembre 2022, par XorOrNor

  I've written a small python script for mass converting audio files. It uses ffmpeg. The problem is it doesn't work for files with single quotes in their filenames.

  


  script :

  


  
import os
import subprocess
import sys
from multiprocessing.pool import ThreadPool as Pool

source_dir="/home/kris/Music/test"
output_dir="/home/kris/Music/test_opus"

def worker(file):

    try:    
        dirname=os.path.dirname(file)
        file=file.replace("'","\\\\'")
        filename=file.split('.flac')[0]
        
        input_file=f"'{source_dir}/{file}'"
        output_file=f"'{output_dir}/{filename}.opus'"
        cmd="ffmpeg -n -i "+input_file+" -c:a libopus -b:a 320k "+output_file
        print(cmd)
        result = subprocess.call(cmd,stdout=subprocess.PIPE,shell=True)
    except:
        print('item error')
        

def start():    
    threads=os.cpu_count()  
    pool = Pool(threads)
    files=os.listdir(source_dir)
    for item in files:
        pool.apply_async(worker, (item,))

    pool.close()
    pool.join()
        
start()



  


  Testing :

  


  


  1. Filename : I'm a file.flac

     


  


  2. When escaping single quote ' with double backslashes \\ - file=file.replace("'","\\\\'") the cmd for ffmpeg is :

     


  


  


  ffmpeg -n -i '/home/kris/Music/test/I\\'m a file.flac' -c:a libopus -b:a 320k '/home/kris/Music/test_opus/I\\'m a file.opus'


  


  ffmpeg returns an error : /home/kris/Music/test/I\\m: No such file or directory

  


  

  3. When escaping single quote ' with a single backslash \ - file=file.replace("'","\\'") the cmd for ffmpeg is :

  


  


  ffmpeg -n -i '/home/kris/Music/test/I\'m a file.flac' -c:a libopus -b:a 320k '/home/kris/Music/test_opus/I\'m a file.opus'


  


  I got an error :

  


  /bin/sh: 1: Syntax error: Unterminated quoted string


  


  According to ffmpeg docs : https://ffmpeg.org/ffmpeg-utils.html#toc-Examples escaping with single backslash should work.

  


• Revision d068d869b9 : sb8x8 integration in rd loop. Work-in-progress, not yet ready for review. TODO

  1er mai 2013, par Ronald S. Bultje

  Changed Paths :
   Modify /vp9/common/vp9_blockd.h

  
   Modify /vp9/common/vp9_entropymode.c

  
   Modify /vp9/common/vp9_entropymode.h

  
   Modify /vp9/common/vp9_enums.h

  
   Modify /vp9/common/vp9_findnearmv.h

  
   Modify /vp9/common/vp9_loopfilter.c

  
   Modify /vp9/common/vp9_onyxc_int.h

  
   Modify /vp9/common/vp9_reconinter.c

  
   Modify /vp9/decoder/vp9_decodemv.c

  
   Modify /vp9/decoder/vp9_decodframe.c

  
   Modify /vp9/encoder/vp9_bitstream.c

  
   Modify /vp9/encoder/vp9_block.h

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encodeintra.c

  
   Modify /vp9/encoder/vp9_encodeintra.h

  
   Modify /vp9/encoder/vp9_encodemb.c

  
   Modify /vp9/encoder/vp9_encodemb.h

  
   Modify /vp9/encoder/vp9_modecosts.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_onyx_int.h

  
   Modify /vp9/encoder/vp9_quantize.c

  
   Modify /vp9/encoder/vp9_ratectrl.c

  
   Modify /vp9/encoder/vp9_rdopt.c

  
   Modify /vp9/encoder/vp9_rdopt.h

  
   Modify /vp9/encoder/vp9_segmentation.c

  
   Modify /vp9/encoder/vp9_tokenize.c

  
  
  sb8x8 integration in rd loop.

  Work-in-progress, not yet ready for review. TODO items :
   bitstream writing (encoder) and reading (decoder)
   decoder reconstruction

  Change-Id : I5afb7284e7e0480847b47cd0097cb469433c9081