Hi guys, I am using a Mac (High Sierra 10.13.1). Initially, I executed the following command to get the devices index:
> ffmpeg -f avfoundation -list_devices true -i "" ffmpeg version 3.3.5 Copyright (c) 2000-2017 the FFmpeg developers built with Apple LLVM version 9.0.0 (clang-900.0.39.2) configuration: --target-os=darwin --arch=x86_64 --enable-cross-compile --disable-debug --enable-videotoolbox --disable-doc --enable-pic --enable-protocol=https --enable-openssl --extra-cflags='-arch x86_64' --extra-ldflags='-arch x86_64 -framework VideoToolbox' --disable-shared --enable-static --pkg-config-flags=--static --prefix=/Users/atensai/ffmpeg-3.3.5-x86_64 libavutil 55. 58.100 / 55. 58.100 libavcodec 57. 89.100 / 57. 89.100 libavformat 57. 71.100 / 57. 71.100 libavdevice 57. 6.100 / 57. 6.100 libavfilter 6. 82.100 / 6. 82.100 libswscale 4. 6.100 / 4. 6.100 libswresample 2. 7.100 / 2. 7.100 [AVFoundation input device @ 0x7f89ff40d700] AVFoundation video devices: [AVFoundation input device @ 0x7f89ff40d700] [0] FaceTime HD Camera [AVFoundation input device @ 0x7f89ff40d700] [1] Capture screen 0 [AVFoundation input device @ 0x7f89ff40d700] AVFoundation audio devices: [AVFoundation input device @ 0x7f89ff40d700] [0] Soundflower (64ch) [AVFoundation input device @ 0x7f89ff40d700] [1] Built-in Microphone [AVFoundation input device @ 0x7f89ff40d700] [2] Soundflower (2ch) [AVFoundation input device @ 0x7f89ff40d700] [3] WavTap Then I produced an audio capture (m4a) using the following command: > ffmpeg -y -f avfoundation -i "1:2" -map 0:a -c:a aac_at -b:a 128k out.m4a I get a file that sounds perfect Then I tried to produce an audio/video file using the command: > ffmpeg -y -f avfoundation -video_size 640x480 -pix_fmt yuyv422 -i "1:2" -b:v 7500k -c:a aac -b:a 64k -vsync 2 -async 1 out.mp4 Everything looks good except that the audio has crackling noise which is very pronounced when people are talking Can someone help me with that? Thanks. _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
