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• FFMPEG no audio in final output [migrated]

  16 juin 2015, par Maverick

  I have the following FFMPEG command working.

  ffmpeg -y -i slide.mp4 -f lavfi -i "color=c=black:s=1920x1080:r=25:d=1" -filter_complex "[0:v] setpts=PTS-STARTPTS [main]; \
  
   [1:v] trim=end=3,setpts=PTS-STARTPTS [pre]; \
  
   [1:v] trim=end=3,setpts=PTS-STARTPTS [post]; \
  
   [pre][main][post] concat=n=3:v=1:a=0 [out]" -map "[out]" output.mp4

  It appends black frames at the start and end of the video. However, the output file does not contain the audio from the input file.

  Any pointers to the problem will be highly appreciated.

• Two videos playing, how to crop the second video in FFmpeg

  14 janvier 2021, par Rorlingur

  I'm totally new to FFmpeg and I'm still learning.

  


  I've been trying to combine two videos into one. Where there is a "main" video that plays and a secondary video that is much smaller in the corner.

  


  I have managed to figure out almost everything on my own except for how to crop the smaller corner video by half. My goal is to crop/cut the corner video so it will only show the right half of the video but I can't seem to make it work, any help/tips would be much appreciated !

  


  ffmpeg -ss 00:04:10.10 -i corner.m4v -vf "movie=main.mkv [in1]; [in]scale=iw/4:ih/4, pad=0*iw:ih[in0]; [in1][in0] overlay=main_w/1.334:550 [out]" -b:v 3500k out.mkv


  


  The above is what I currently have that works, the only thing that is missing is cropping the corner video.

  


• FFmpeg Arthenica always encodes with x265 Main10 profile [closed]

  5 avril, par Jabed Dhali

  I'm using FFmpeg-Kit (Arthenica) for iOS to compress videos using the libx265 encoder. I'm building FFmpeg with a custom configuration script :

  


  export CUSTOM_CONFIG="--disable-indevs \
  --disable-outdevs \
  --disable-hwaccels \
  --enable-videotoolbox \
  --disable-protocols \
  --enable-protocol=file,fd,saf,async \
  --disable-decoders \
  --enable-decoder=${ENABLE_DECODER_LIST} \
  --disable-encoders \
  --enable-encoder=${ENABLE_ENCODER_LIST}"

export CUSTOM_CONFIG_IOS=${CUSTOM_CONFIG}
  ./ios.sh --enable-ios-videotoolbox --enable-lame --enable-libaom  --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-opencore-amr --enable-openh264 --enable-opus --enable-twolame --enable-x264 --enable-x265 --enable-gpl


  


  Then I run FFmpeg with the following commands :

  


  -y -hide_banner -i input.MOV -vcodec libx265 -x265-params profile=main output.mov
-y -hide_banner -i input.MOV -vcodec libx265 -x265-params profile=main10 output.mov


  


  However, regardless of the profile I set, the output always ends up being encoded with the Main10 profile.

  


  Here’s the log output :

  


  x265 [info]: HEVC encoder version 3.4
x265 [info]: build info [Mac OS X][clang 16.0.0][32 bit][noasm] 10bit
x265 [info]: using cpu capabilities: none!
x265 [info]: Main 10 profile, Level-5 (Main tier)


  


  It seems that the FFmpeg build only supports 10-bit encoding. I want to be able to encode with different profiles (main, main10, etc.), as well as to build libx265 in a way that supports 8-bit + 10-bit + 12-bit encoding (unified 64-bit build), as like as the same command executes for MacOS.

  


  x265 [info]: HEVC encoder version 4.1+1-1d117be
x265 [info]: build info [Mac OS X][clang 16.0.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: NEON Neon_DotProd Neon_I8MM
x265 [info]: Main profile, Level-2.1 (Main tier)


  


  How can I correctly configure and build FFmpeg and libx265 with Mobile FFmpeg to support multiple bit depths and allow setting different profiles via -x265-params ?