Recherche avancée

Sur d’autres sites (6957)

• How do I get drawtext filter in ffmpeg to work on ubuntu 22.04 ?

  3 décembre 2024, par chovy

  Here's my script, but no matter what I try the drawtext filter is not enabled :

  


  #!/bin/bash

set -e  # Exit on any error

# Define installation directories
INSTALL_DIR="$HOME/ffmpeg_build"
BIN_DIR="$HOME/bin"
SOURCE_DIR="$HOME/ffmpeg_sources"
NUM_CORES=$(nproc)

echo "Creating necessary directories..."
mkdir -p "$INSTALL_DIR" "$BIN_DIR" "$SOURCE_DIR"

# Install required tools and dependencies
echo "Installing build tools and essential libraries..."
sudo apt-get update
sudo apt-get install -y \
  autoconf automake build-essential cmake git-core libass-dev \
  libfreetype6-dev libsdl2-dev libtool libva-dev libvdpau-dev \
  libvorbis-dev libxcb1-dev libxcb-shm0-dev libxcb-xfixes0-dev \
  meson ninja-build pkg-config texinfo wget yasm zlib1g-dev \
  nasm libnuma-dev libfdk-aac-dev libmp3lame-dev libopus-dev \
  libfreetype6 libdrm-dev mercurial

# Remove system-installed x264 and x265 to prevent conflicts
sudo apt-get remove -y libx264-dev libx265-dev x264 x265

# Build dependencies
cd "$SOURCE_DIR"

# Install libx264 (static)
if [ ! -d "$SOURCE_DIR/x264" ]; then
  echo "Building and installing libx264..."
  git clone --branch stable --depth 1 https://code.videolan.org/videolan/x264.git
  cd x264
  make distclean || true
  ./configure --prefix="$INSTALL_DIR" --enable-static --disable-opencl
  make -j$NUM_CORES
  make install
  cd "$SOURCE_DIR"
fi

# Install libx265 (static)
if [ ! -d "$SOURCE_DIR/x265" ]; then
  echo "Building and installing libx265..."
  git clone --depth 1 https://github.com/videolan/x265.git
  cd x265/build/linux
  cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX="$INSTALL_DIR" \
    -DENABLE_SHARED=OFF -DENABLE_PIC=ON -DENABLE_PKGCONFIG=ON ../../source
  make -j$NUM_CORES
  make install
  cd "$SOURCE_DIR"
fi

# Install libvpx (static)
if [ ! -d "$SOURCE_DIR/libvpx" ]; then
  echo "Building and installing libvpx..."
  git clone --depth 1 https://chromium.googlesource.com/webm/libvpx.git
  cd libvpx
  ./configure --prefix="$INSTALL_DIR" --disable-examples --disable-unit-tests \
    --enable-vp9-highbitdepth --as=yasm --enable-static --enable-pic
  make -j$NUM_CORES
  make install
  cd "$SOURCE_DIR"
fi

# Install libopus (static)
if [ ! -d "$SOURCE_DIR/opus" ]; then
  echo "Building and installing libopus..."
  git clone --depth 1 https://github.com/xiph/opus.git
  cd opus
  ./autogen.sh
  ./configure --prefix="$INSTALL_DIR" --disable-shared
  make -j$NUM_CORES
  make install
  cd "$SOURCE_DIR"
fi

# Install libaom (static)
if [ ! -d "$SOURCE_DIR/aom" ]; then
  echo "Building and installing libaom..."
  git clone --depth 1 https://aomedia.googlesource.com/aom
  mkdir -p aom_build
  cd aom_build
  cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX="$INSTALL_DIR" \
    -DBUILD_SHARED_LIBS=0 -DENABLE_NASM=1 -DCMAKE_C_FLAGS="-fPIC" ../aom
  make -j$NUM_CORES
  make install
  cd "$SOURCE_DIR"
fi

# Build and install FFmpeg
echo "Building and installing FFmpeg..."
cd "$SOURCE_DIR"
if [ ! -d "$SOURCE_DIR/ffmpeg" ]; then
  git clone --depth 1 https://git.ffmpeg.org/ffmpeg.git ffmpeg
  cd ffmpeg
else
  cd ffmpeg
  git pull
fi

export PKG_CONFIG_PATH="$INSTALL_DIR/lib/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig:/usr/lib/$(uname -m)-linux-gnu/pkgconfig:$PKG_CONFIG_PATH"

make distclean

./configure \
  --prefix="$INSTALL_DIR" \
  --pkg-config-flags="--static" \
  --extra-cflags="-I$INSTALL_DIR/include" \
  --extra-ldflags="-L$INSTALL_DIR/lib" \
  --extra-libs="-lpthread -lm" \
  --bindir="$BIN_DIR" \
  --enable-gpl \
  --enable-nonfree \
  --enable-libfreetype \
  --enable-libx264 \
  --enable-libvpx \
  --enable-libmp3lame \
  --enable-libopus \
  --enable-libass \
  --enable-libvorbis \
  --enable-libaom \
  --enable-libdrm \
  --enable-version3 \
  --enable-static \
  --disable-shared \
  --enable-small
  
make -j$NUM_CORES
make install

# Add ffmpeg to PATH
echo "export PATH=\"$BIN_DIR:\$PATH\"" >> "$HOME/.bashrc"
source "$HOME/.bashrc"

# Final checks
echo "FFmpeg installation complete. Verifying installation..."
ffmpeg -version



  


  Here is my buildconf which appears correct :

  


  $ ffmpeg -buildconf  

ffmpeg version N-117989-gcb27e478f7 Copyright (c) 2000-2024 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
  configuration: --prefix=/usr/local --extra-cflags=-I/home/ubuntu/src/ffmpeg_build/include --extra-ldflags=-L/home/ubuntu/src/ffmpeg_build/lib --bindir=/usr/local/bin --enable-gpl --enable-nonfree --enable-libfreetype --enable-libx264 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libass --enable-libvorbis --enable-libaom --enable-libdrm --enable-version3 --enable-shared --enable-filter=drawtext  libavutil      59. 47.101 / 59. 47.101  libavcodec     61. 26.100 / 61. 26.100  libavformat    61.  9.100 / 61.  9.100  libavdevice    61.  4.100 / 61.  4.100  libavfilter    10.  6.101 / 10.  6.101  libswscale      8. 12.100 /  8. 12.100  libswresample   5.  4.100 /  5.  4.100
  libpostproc    58.  4.100 / 58.  4.100

  configuration:    --prefix=/usr/local
    --extra-cflags=-I/home/ubuntu/src/ffmpeg_build/include
    --extra-ldflags=-L/home/ubuntu/src/ffmpeg_build/lib
    --bindir=/usr/local/bin
    --enable-gpl    --enable-nonfree    --enable-libfreetype    --enable-libx264    --enable-libvpx    --enable-libmp3lame    --enable-libopus    --enable-libass    --enable-libvorbis    --enable-libaom    --enable-libdrm    --enable-version3    --enable-shared    --enable-filter=drawtext


  


  However the filter drawtext is not enabled :

  


  $ ffmpeg -filters | grep drawtext
ffmpeg version N-117989-gcb27e478f7 Copyright (c) 2000-2024 the FFmpeg developers  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)  configuration: --prefix=/usr/local --extra-cflags=-I/home/ubuntu/src/ffmpeg_build/include --extra-ldflags=-L/home/ubuntu/src/ffmpeg_build/lib --bindir=/usr/local/bin --enable-gpl --enable-nonfree --enable-libfreetype --enable-libx264 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libass --enable-libvorbis --enable-libaom --enable-libdrm --enable-version3 --enable-shared --enable-filter=drawtext  libavutil      59. 47.101 / 59. 47.101  libavcodec     61. 26.100 / 61. 26.100  libavformat    61.  9.100 / 61.  9.100  libavdevice    61.  4.100 / 61.  4.100  libavfilter    10.  6.101 / 10.  6.101  libswscale      8. 12.100 /  8. 12.100  libswresample   5.  4.100 /  5.  4.100  libpostproc    58.  4.100 / 58.  4.100


  


• Increased File Size When Converting MP4 to WebM using FFmpeg

  23 décembre 2024, par kimgijeong

  I am using FFmpeg to convert MP4 to WebM with the following command :

  


  ffmpeg -y -hide_banner -nostats \
-f mov,mp4,m4a,3gp,3g2,mj2 -i "http://127.0.0.1:80/lotteon-low-bitrate.mp4" \
-threads auto -f webm -acodec libopus -b:a 96.059k -vcodec libsvtav1 -preset 11 -pix_fmt yuv420p \
-vf "scale='min(-1, iw)':'min(-1,ih)':force_original_aspect_ratio=decrease,crop=trunc(iw/2)*2:trunc(ih/2)*2" \
"/usr/local/m2/m2temp/xcdrtmp/2052_1.webm"


  


  However, the output webm file size is larger than the source MP4 file. For example :

  


  


  • Source MP4 : 4.6 MB (bit rate : 994,053 bps)

    


  


  • Output WebM : 16 MB (bit rate : 3,902,037 bps)

    


  


  


  I know SVT-AV1 encoder defaults to CRF mode. Due to not specifying the bitrate explicitly, the SVT-AV1 encoder automatically sets the bit_rate. It appears that the encoder is setting it to a much higher value (3,323,104 bps), causing the increase in file size compared to the source MP4 (994,053 bps). Here are the methods i tried to reduce the WebM file size compared to the source MP4 :

  


  

  1. -b:v 994k

  


  


  I tried to match the target bitrate with the source MP4's bitrate to reduce the output size, but encountered the following error :

  


  Svt[error]: Instance 1: Force key frames is not supported for VBR mode Last message r
epeated 2 times [libsvtav1 @ 0x239dd100] Error setting encoder parameters: bad parameter (0x80001005)


  


  Looking at the official documentation, this mode change (from CRF to VBR when setting a target bitrate) appears to be expected behavior. However, the error is puzzling since I haven't set any force keyframe parameters in the FFmpeg command.

  


  

  2. svtav1-params "mbr=994k"

  


  


  The second method i tried was using the svtav1-params "mbr=994k" option to set the maxrate while maintaining CRF mode This method showed some improvement, but the output file size was still larger than the source MP4.

  


  

  • Output WebM : 5MB (bit rate : 1,209,877 bps)

  


  


  The more critical reason why we can't adopt the second method (using svtav1-params "mbr=994k") is that even for the same MP4 source file, the output file size varies slightly with each encoding.

  


  

  3. -b:v 994k -svtav1-params “rc=2:pred-struct=1”(CBR, low delay)

  


  


  The final method I tried was setting the target bitrate while using CBR (Constant Bit Rate) and low-delay mode The default value for pred-structure is 2(random access), but I had to use low-delay mode due to the following error :

  


  Svt[error]: CBR Rate control is currently not supported for SVT_AV1_PRED_RANDOM_ACCESS, use VBR mode


  


  This way was the only approach among those i tried that successfully reduced the output size.

  


  

  • Output WebM : 4.3MB (bit rate : 1,032,373 bps)

  


  


  In summary, I have three questions about this MP4 to WebM conversion issue :

  


  


  1. When setting the target bitrate with -b:v 994k, the switch to VBR mode is expected behavior. However, why does the force keyframe error occur when we haven't explicitly set any force keyframe parameters ?

     


  


  2. Why does the output WebM file size fluctuate when setting maxrate either through -maxrate or svtav1-params "mbr=994k", even when using the same MP4 source file ?

     


  


  3. Besides using -b:v 994k -svtav1-params "rc=2:pred-struct=1" (CBR with low delay), are there any other methods that can guarantee a WebM output size smaller than the source MP4 when converting from MP4 to WebM ?

     


  


  


  I am using a recent version of the SVT-AV1 codec :

  


  Svt[info]: SVT [version]:       SVT-AV1 Encoder Lib 58146ca
Svt[info]: SVT [build]  :       GCC 11.5.0 20240719 (Red Hat 11.5.0-2)   64 bit
Svt[info]: LIB Build date: Oct 28 2024 07:40:59
ffmpeg video svt-av1


  


• FFMPEG, How to stream video and audio into one file with volume adjustment and video cropping [closed]

  24 décembre 2024, par Unlock iPhone

  ffmpeg -i "1.mp4" -i "Knockout.mp3" -filter_complex "[0:a]volume=0.1,atempo=1.1[a] ;[1:a]volume=1[b] ;[a][b]amix=inputs=2[audio]" -filter_complex "setpts=PTS/1.1,crop='min(iw\,ih1/1)' :'min(ih\,iw1/1)" -c:v libx264 -preset ultrafast -tune fastdecode -crf 20 -c:a aac -b:a 128k -r 30 -strict experimental -shortest "Output_00001.mp4"

  


  ffmpeg -i "1.mp4" -i "Knockout.mp3" -filter_complex "[0:a]volume=0.1,atempo=1.1[a] ;[1:a]volume=1[b] ;[a][b]amix=inputs=2[audio]" -filter_complex "setpts=PTS/1.1,crop='min(iw\,ih1/1)' :'min(ih\,iw1/1)" -c:v libx264 -preset ultrafast -tune fastdecode -crf 20 -c:a aac -b:a 128k -r 30 -strict experimental -shortest "Output_00001.mp4"
ffmpeg version 2024-12-19-git-494c961379-full_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers
built with gcc 14.2.0 (Rev1, 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-bzlib —enable-lzma —enable-libsnappy —enable-zlib —enable-librist —enable-libsrt —enable-libssh —enable-libzmq —enable-avisynth —enable-libbluray —enable-libcaca —enable-sdl2 —enable-libaribb24 —enable-libaribcaption —enable-libdav1d —enable-libdavs2 —enable-libopenjpeg —enable-libquirc —enable-libuavs3d —enable-libxevd —enable-libzvbi —enable-libqrencode —enable-librav1e —enable-libsvtav1 —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxavs2 —enable-libxeve —enable-libxvid —enable-libaom —enable-libjxl —enable-libvpx —enable-mediafoundation —enable-libass —enable-frei0r —enable-libfreetype —enable-libfribidi —enable-libharfbuzz —enable-liblensfun —enable-libvidstab —enable-libvmaf —enable-libzimg —enable-amf —enable-cuda-llvm —enable-cuvid —enable-dxva2 —enable-d3d11va —enable-d3d12va —enable-ffnvcodec —enable-libvpl —enable-nvdec —enable-nvenc —enable-vaapi —enable-libshaderc —enable-vulkan —enable-libplacebo —enable-opencl —enable-libcdio —enable-libgme —enable-libmodplug —enable-libopenmpt —enable-libopencore-amrwb —enable-libmp3lame —enable-libshine —enable-libtheora —enable-libtwolame —enable-libvo-amrwbenc —enable-libcodec2 —enable-libilbc —enable-libgsm —enable-liblc3 —enable-libopencore-amrnb —enable-libopus —enable-libspeex —enable-libvorbis —enable-ladspa —enable-libbs2b —enable-libflite —enable-libmysofa —enable-librubberband —enable-libsoxr —enable-chromaprint
libavutil 59. 51.100 / 59. 51.100
libavcodec 61. 27.101 / 61. 27.101
libavformat 61. 9.101 / 61. 9.101
libavdevice 61. 4.100 / 61. 4.100
libavfilter 10. 6.101 / 10. 6.101
libswscale 8. 12.100 / 8. 12.100
libswresample 5. 4.100 / 5. 4.100
libpostproc 58. 4.100 / 58. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4' :
Metadata :
minor_version : 512
major_brand : isom
compatible_brands : isomiso2avc1mp41
metadata1 : TC1nO7kRGA2g5D7EvY6mVieKMGAICBrUodQ2askGrBS9jYT4Vj3PxKPaPJbSJiYW312zpE9OA+GfQsSmsg/l0YPpVbGHSS0k1WWlIhavn4vgaEjIiMMw5ES5FyQ6NBpt9K1YOSiIg6IEc4CgvXCVgyI5VVvX9u053QTky2KsdRNRA32Ui1XkoBTAB
metadata0 : ChtzZWN1cml0eS5rbGluZy5tZXRhX2VuY3J5cHQS8AGDblTacnE/fscfVL6m9on8gh3O9gP57LnH5Gi3m5WuoRauKnAkpgZgCqmDNvDCKcv7WjIn6u+WSNAu60xW9WLkiOodDgOO2LkcD3RQmNE435FJW7rzQGPQCWEORRjI73eTSQLHggb3O876An7Ho7eHOiOljlsdEkvPDRIGlAwfn5QZKj43rdvl4q6p0lL1Wjb6qGjdvX0e6QTI1dT9qdr
encoder : Lavf58.45.100
Duration : 00:00:10.04, start : 0.000000, bitrate : 16952 kb/s
Stream #0:00x1 : Video : h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1080x1920, 16948 kb/s, 24 fps, 24 tbr, 12288 tbn (default)
Metadata :
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Input #1, mp3, from 'Knockout.mp3' :
Metadata :
encoder : Lavf61.5.101
Duration : 00:02:14.54, start : 0.023021, bitrate : 131 kb/s
Stream #1:0 : Audio : mp3 (mp3float), 48000 Hz, stereo, fltp, 131 kb/s
Metadata :
encoder : Lavc61.12
[fc#0 @ 0000025538b16280] Stream specifier ':a' in filtergraph description [0:a]volume=0.1,atempo=1.1[a] ;[1:a]volume=1[b] ;[a][b]amix=inputs=2[audio] matches no streams.
Error binding filtergraph inputs/outputs : Invalid argument