[FFmpeg-user] Audio not playing in Quicktime Player

[Dave Rice]

> On Jan 2, 2018, at 9:44 AM, Gabriel Zachmann <zach at cs.uni-bremen.de> wrote:
> 
> I am converting a video , but when I play the output in Quicktime Player on macOS, then the audio seems to be gone.
> However, when I play the output video using VLC, everything is fine, I can hear the audio.
> The images in the video play fine in both Quicktime Player and VLC.
> 
> Does anybody have an idea what I might be doing wrong?
> 
> Here are more details.
> 
> The command line for conversion:
> 
> /usr/local/bin/ffmpeg -i "$input" \
>        -map 0 -c:s copy -c:a copy -map_metadata 0 \
>        -f mp4 -codec:v hevc -tag:v hvc1 \
>        -preset faster -crf 24 -x265-params \
>        "aq-mode=3:psy-rd=1.6:psy-rdoq=5.0:rdoq-level=1" \
>        "$output"
> 
> I am living under macOS 10.13.2 (High Sierra).
> 
> The self-report of ffmpeg is:
> 
> ffmpeg version N-87824-g25bd2f4 Copyright (c) 2000-2017 the FFmpeg developers
>  built with Apple LLVM version 9.0.0 (clang-900.0.37)
>  configuration: --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-indev=jack --disable-outdev=xv --enable-audiotoolbox --enable-sdl2 --enable-shared --enable-pthreads --enable-videotoolbox --arch=x86_64 --enable-x86asm --enable-libx265 --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --extra-ldflags='-L /opt/local/lib -framework CoreVideo -lfribidi' --extra-cflags='-I /opt/local/include/ -framework CoreVideo'
>  libavutil      55. 79.100 / 55. 79.100
>  libavcodec     57.108.100 / 57.108.100
>  libavformat    57. 84.100 / 57. 84.100
>  libavdevice    57. 11.100 / 57. 11.100
>  libavfilter     6.108.100 /  6.108.100
>  libavresample   3.  8.  0 /  3.  8.  0
>  libswscale      4.  9.100 /  4.  9.100
>  libswresample   2. 10.100 /  2. 10.100
>  libpostproc    54.  8.100 / 54.  8.100
> 
> 
> Any hints and suggestions will be highly appreciated.

Could you share the full terminal output rather than only this part. I suspect your copying an audio encoding from the input to output that QuickTime doesn’t support, but there’s not enough clues to see that. If re-encoding the audio is acceptable, then replace -c:a copy with -c:a aac or another audio encoding that QuickTime will support.
Dave Rice