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Sur d’autres sites (10853)

  • FFMPEG, pixelated frames, and webm format

    22 septembre 2016, par Abel Mohler

    It seems like every time I split a .webm video, half or more of the frames are pixelated and distorted.

    My configuration looks like the following :

    FFmpeg version 0.6.6-4:0.6.6-0ubuntu0.11.04.1, Copyright (c) 2000-2010 the Libav developers
    
  built on Jun 12 2012 16:35:16 with gcc 4.5.2
    
  configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static

    Does anyone have any experience with something similar to this ? When I play the same videos with a standard ffmpeg player on the same system, they look just fine.

  • ffmpeg : using the returned data in php

    4 décembre 2013, par user1503606

    I have started using ffmpeg and I am very new to it, so please bear with me.

    I have installed ffmpeg on my server and it works great ; I can run certain commands and get output data when logged in via ssh

    For example I can run

    ffmpeg -i Sleep\ Away.mp3

    Which returns the following :

    ffmpeg version 0.8.5, Copyright (c) 2000-2011 the FFmpeg developers
    
  built on Aug 20 2012 09:28:43 with clang 3.1 (tags/Apple/clang-318.0.61)
    
  configuration: --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libfaac --enable-libxvid --enable-libx264 --enable-libvpx --enable-hardcoded-tables --enable-shared --enable-pthreads --disable-indevs --cc=clang
    
  libavutil    51.  9. 1 / 51.  9. 1
    
  libavcodec   53.  7. 0 / 53.  7. 0
    
  libavformat  53.  4. 0 / 53.  4. 0
    
  libavdevice  53.  1. 1 / 53.  1. 1
    
  libavfilter   2. 23. 0 /  2. 23. 0
    
  libswscale    2.  0. 0 /  2.  0. 0
    
  libpostproc  51.  2. 0 / 51.  2. 0
    
[mp3 @ 0x7f9694011a00] Header missing
    
    Last message repeated 13 times
    
[mp3 @ 0x7f9694007c00] max_analyze_duration 5000000 reached at 5007020
    
[mp3 @ 0x7f9694007c00] Estimating duration from bitrate, this may be inaccurate
    
Input #0, mp3, from 'Sleep Away.mp3':
    
  Metadata:
    
    track           : 3
    
    album           : Bob Acri
    
    artist          : Bob Acri
    
    title           : Sleep Away
    
    genre           : Jazz
    
    album_artist    : Bob Acri
    
    composer        : Robert R. Acri
    
    date            : 2004
    
  Duration: 00:03:21.77, start: 0.000000, bitrate: 192 kb/s
    
    Stream #0.0: Audio: mp3, 44100 Hz, stereo, s16, 192 kb/s
    
At least one output file must be specified

    The question I am asking is, how can I use the output data above ? I am developiong a music website ; say I want to loop through all the MP3 files and save the info about them into a database, so that the above would result in :

    Sleep Away.mp3    mp3    3:21    Jazz    2004     Bob Acri ...

    obviously in a table

    I have tried to use the php backtick operator with no success so far. I just thought I would put a question up here to get some advice from people that have done something similar.

    Thanks

    Update : I have tried the following

    &lt;?php $output = `ffmpeg -i Sleep\ Away.mp3`; echo "<pre>$output</pre>"; ?>
    
&lt;?php $output = shell_exec(&#39;ffmpeg -i Sleep\ Away.mp3&#39;); echo "<pre>$output</pre>"; ?>

    both don't appear to return anything.

  • no c compiler found libx264 build [closed]

    24 août 2012, par kerim yucel

    I have been trying to build ffmpeg for Android and I have managed to do so by using roman10's tutorial.

    However, I needed x264 and I enabled libx264 in the configurations but it wasn't able to find the library. A quick internet search led me to the answer that I have to build x264 seperately and include it to ffmpeg config by editing ExternalLibs flags.

    Currently I am using this script to build x264. Everything is fine except the fact that the error saying "No working C compiler is found" pops up. I have updated and installed build-essential and my gcc version is up to date.

    Any help will be appreciated. Thanks a lot.

    P.S. I am using ndk 4 just to make everything compatible with the tutorial link given above. I am running Ubuntu with VirtualBox from Windows 7.

    Edit : I have been trying this tutorial as well, I am getting the same error along with unknown options error for each configuration options.

    Another edit :
    I have tried this code and obtained the following.

    echo 'int main() return 0 ;' > main.c && arm-eabi-gcc main.c || echo $ ?

    /home/mehmet/Android_NDK_r4/build/prebuilt/linux-x86/arm-eabi-4.4.0/bin/../lib/gcc/arm-eabi/4.4.0/../../../../arm-eabi/bin/ld : crt0.o : No such file : No such file or directory collect2 : ld returned
    1 exit status 1

    I have checked the flags as well, flags seem ok or I can't see the faulty line. Above you may find the build script I am using.

    export ARM_ROOT=/home/mehmet/Android_NDK_r4
    
export ARM_INC=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/include/
    
export ARM_LIB=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/lib/
    
export ARM_TOOL=$ARM_ROOT/build/prebuilt/linux-x86/arm-eabi-4.4.0
    
export ARM_LIBO=$ARM_TOOL/lib/gcc/arm-eabi/4.4.0
    
export PATH=$ARM_TOOL/bin:$PATH
    
export PATH=$ARM_TOOL/arm-eabi/bin:$PATH
    
export ARM_PRE=arm-eabi 
    
./configure --prefix=/sdcard/arm_and \
    
--disable-gpac \
    
--extra-cflags=" -I$ARM_INC -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
    
ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
    
ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
    
MMD -MP " \
    
--extra-ldflags=" -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
    
/lib/libz.so -Wl,-rpath-link=$ARM_LIB,-dynamic-linker=/system/bin/linker -L$ARM_LIB -nostdlib $ARM_LIB/crtbegin_dynamic.o $ARM_LIB/crtend_android.o -lc -lm -ldl -lgcc " \
    
--cross-prefix=${ARM_PRE}- \
    
--disable-asm\
    
--host=arm-linux \

    Third edit :

    Config.log gives the following.

    x264 configure script
    
Command line options: "--prefix=/sdcard/arm_and" "--disable-gpac" "--extra-cflags=" "-I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/" "-fPIC" "-DANDROID" "-fpic" "-mthumb-interwork" "-ffunction-sections" "-funwind-tables" "-fstack-prote" "ctor" "-fno-short-enums" "-D__ARM_ARCH_5__" "-D__ARM_ARCH_5T__" "-D__ARM_ARCH_5E__" "-D__ARM_ARCH_5TE__" "-Wno-psabi" "-march=armv5te" "-mtu" "ne=xscale" "-msoft-float" "-mthumb" "-Os" "-fomit-frame-pointer" "-fno-strict-aliasing" "-finline-limit=64" "-DANDROID" "-Wa,--noexecstack" "-" "MMD" "-MP" "--extra-ldflags=" "-nostdlib" "-Bdynamic" "-Wl,--no-undefined" "-Wl,-z,noexecstack" "-Wl,-z,nocopyreloc" "-Wl,-soname,/system" "/lib/libz.so" "-Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker" "-L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/" "-nostdlib" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o" "-lc" "-lm" "-ldl" "-lgcc" "--cross-prefix=arm-eabi-" "--disable-asm" "--host=arm-linux"
    

    
    checking whether arm-eabi-gcc works... no
    
    Failed commandline was:
    
    --------------------------------------------------
    
    arm-eabi-gcc conftest.c -Wall -I. -I$(SRCPATH) -I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/ -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
    
    ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
    
    ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
    
    MMD -MP -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
    
    /lib/libz.so -Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker -L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/ -nostdlib /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o -lc -lm -ldl -lgcc -lm -o conftest
    
    arm-eabi-gcc: ctor: No such file or directory
    
    arm-eabi-gcc: ne=xscale: No such file or directory
    
    arm-eabi-gcc: MMD: No such file or directory
    
    arm-eabi-gcc: /lib/libz.so: No such file or directory
    
    cc1: error: unrecognized command line option "-mtu"
    
    cc1: error: unrecognized command line option "-fstack-prote"
    
    cc1: error: to generate dependencies you must specify either -M or -MM
    
    arm-eabi-gcc: -E or -x required when input is from standard input
    
    --------------------------------------------------
    
    Failed program was:
    
    --------------------------------------------------
    
    int main () { return 0; }
    
    --------------------------------------------------
    
    DIED: No working C compiler found.

    Last edit
    Problem solved. It was just a mistake related to typos. It works well now.

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