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Ensure CBR for audio #18

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Ensure CBR for audio #18

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b96ee52
Removing use of -thread_queue_size in hopes of reducing/removing desy…
morgant Oct 3, 2025
b5de6a9
Reintroduce conservative use of -thread_queue_size ('64' instead of '…
morgant Oct 14, 2025
ef19a7c
Restored original line break formatting (one ffmpeg instance per line…
morgant Nov 14, 2025
bf1a1ea
Split 'bufsize' variable into 'audio_bufsize' & 'video_bufsize'. Swit…
morgant Oct 6, 2025
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38 changes: 21 additions & 17 deletions fauxstream
100755 → 100644
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ USAGE="Usage: `basename $0` [-p preset] [-m] [-d mic_device] [-a audiooffset] [-

audiooffset=0.0
audio_bitrate=96
bufsize=
audio_bufsize=
container=flv
filename=
framerate=30
Expand All @@ -70,6 +70,7 @@ scale_w=
threads=0
videocodec=libx264
video_bitrate=3500
video_bufsize=
video_device=
video_format=
video_output_fps=
Expand Down Expand Up @@ -150,8 +151,9 @@ else
video_output_fps="-r $framerate"
fi

bufsize=`expr $video_bitrate \* 2`
gop=`expr $framerate \* 2`
audio_bufsize="$((audio_bitrate * 2))"
video_bufsize="$((video_bitrate * 2))"
gop="$((framerate * 2))"


sndio_device="$(sndioctl -n server.device | cut -f1 -d'(')"
Expand Down Expand Up @@ -213,12 +215,11 @@ echo "): ${resolution}${offset}\n"
GLOBAL="\
-hide_banner \
-loglevel error \
-thread_queue_size 512 \
-threads $threads\
"

VIDEO_IN="\
-thread_queue_size 512 \
-thread_queue_size 64 \
-show_region 1 \
${video_device} \
-f x11grab \
Expand All @@ -234,7 +235,7 @@ ${video_output_fps} \
-b:v ${video_bitrate}k \
-minrate ${video_bitrate}k \
-maxrate ${video_bitrate}k \
-bufsize ${bufsize}k \
-bufsize ${video_bufsize}k \
-preset ultrafast \
-tune zerolatency \
${video_format} \
Expand All @@ -244,26 +245,27 @@ ${video_format} \
"

MON_IN="\
-thread_queue_size 512 \
-f sndio \
-i snd/mon\
"

MIC_IN="\
-thread_queue_size 512 \
-f sndio \
-i "$mic_device"\
"

AUDIO_CONV="\
-c:a aac \
-b:a ${audio_bitrate}k \
-minrate ${audio_bitrate}k \
-maxrate ${audio_bitrate}k \
-bufsize ${audio_bufsize}k \
-aac_coder fast\
"

AUDIOMERGE="\
[0]volume=$volume_mic,aformat=channel_layouts=stereo$hilopass[l];\
[1]volume=$volume_mon,aformat=channel_layouts=stereo[m];\
[0]aresample=async=1,volume=$volume_mic,aformat=channel_layouts=stereo$hilopass[l];\
[1]aresample=async=1,volume=$volume_mon,aformat=channel_layouts=stereo[m];\
[l][m]amix=inputs=2[a]\
"

Expand All @@ -272,15 +274,17 @@ AUDIOMERGE="\

if [ $noaudio -lt 1 -a $mic -lt 1 ]; then
#only monitoring stream
RUN="ffmpeg $GLOBAL $MON_IN $AUDIO_CONV -f nut pipe:1 | \
ffmpeg $GLOBAL -thread_queue_size 512 -f nut -itsoffset $audiooffset -i pipe:0 \
$VIDEO_IN $VIDEO_CONV -c:a copy -f "${container}" \"$filename\""
RUN="ffmpeg $GLOBAL $MON_IN -f nut pipe:1 | \
ffmpeg $GLOBAL -thread_queue_size 64 -f nut -itsoffset $audiooffset -i pipe:0 \
-filter_complex aresample=async=1 $VIDEO_IN $VIDEO_CONV $AUDIO_CONV \
-f "${container}" \"$filename\""
elif [ $noaudio -lt 1 ]; then
#mon + mic stream
RUN="ffmpeg $GLOBAL $MIC_IN $MON_IN -filter_complex \"${AUDIOMERGE}\" \
-map '[a]' $AUDIO_CONV -f nut pipe:1 | \
ffmpeg $GLOBAL -thread_queue_size 512 -f nut -itsoffset $audiooffset -i pipe:0 \
$VIDEO_IN $VIDEO_CONV -c:a copy -f "${container}" \"$filename\""
RUN="ffmpeg $GLOBAL $MIC_IN $MON_IN -filter_complex \"${AUDIOMERGE}\" -map '[a]' \
-f nut pipe:1 | \
ffmpeg $GLOBAL -thread_queue_size 64 -f nut -itsoffset $audiooffset -i pipe:0 \
-filter_complex aresample=async=1 $VIDEO_IN $VIDEO_CONV $AUDIO_CONV \
-f "${container}" \"$filename\""
else
#no audio
RUN="ffmpeg $GLOBAL $VIDEO_IN $VIDEO_CONV -f "${container}" \"$filename\""
Expand Down