ffmpeg复用mpegts采用system_b样例脚本

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#ffmpeg #mpegts #video #systemb

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本文介绍了一种使用FFmpeg批量转换音视频文件的方法，通过Shell脚本实现对不同音视频格式的支持，包括AC3、EAC3、DCA及AAC等，并记录了处理过程的时间消耗。

# !/bin/sh

#  start run server progress
#  hybase@qq.com QQ:23207689
#

ulimit -c 9999999
date1="`date +"%Y-%m-%d %H:%M:%S"`"
echo "================== start ==================== "

./ffmpeg -i ../nall_720p.ts -loglevel info -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 ac3  -strict -2 -ac 2 -ar 48000 -ab 128k -mpegts_flags system_b -muxrate 0 -muxdelay 0.5 -pes_payload_size 1200 -y strm6_ac3.ts
./ffmpeg -i ../nall_720p.ts -loglevel info -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 eac3 -strict -2 -ac 2 -ar 48000 -ab 128k -mpegts_flags system_b -muxrate 0 -muxdelay 0.5 -pes_payload_size 1200 -y strm6_eac3.ts
./ffmpeg -i ../nall_720p.ts -loglevel info -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 dca  -strict -2 -ac 2 -ar 48000 -ab 320k -mpegts_flags system_b -muxrate 0 -muxdelay 0.5 -pes_payload_size 3200 -y strm6_dts.ts
./ffmpeg -i ../nall_720p.ts -loglevel info -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 aac  -strict -2 -ac 2 -ar 48000 -ab 128k -mpegts_flags system_b -muxrate 0 -muxdelay 0.5 -pes_payload_size 1200 -y strm6_aac.ts
./ffmpeg -i ../nall_720p.ts -loglevel info -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 ac3  -strict -2 -ac 2 -ar 48000 -ab 128k -muxrate 0 -muxdelay 0.5 -pes_payload_size 1200 -y strm0x81_ac3.ts
./ffmpeg -i ../nall_720p.ts -loglevel info -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 eac3 -strict -2 -ac 2 -ar 48000 -ab 128k -muxrate 0 -muxdelay 0.5 -pes_payload_size 1200 -y strm0x87_eac3.ts
./ffmpeg -i ../nall_720p.ts -loglevel info -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 dca  -strict -2 -ac 2 -ar 48000 -ab 320k -muxrate 0 -muxdelay 0.5 -pes_payload_size 3200 -y strm0x82_dts.ts
./ffmpeg -i ../nall_720p.ts -loglevel info -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 aac  -strict -2 -ac 2 -ar 48000 -ab 128k -muxrate 0 -muxdelay 0.5 -pes_payload_size 1200 -y strm0x0f_aac.ts

date2="`date +"%Y-%m-%d %H:%M:%S"`"

time_distance=$(expr $(date +%s -d "$date2") - $(date +%s -d "$date1")) ;
hour_distance=$(expr ${time_distance} / 3600);
hour_remainder=$(expr ${time_distance} % 3600) ;
min_distance=$(expr ${hour_remainder} / 60) ;
min_remainder=$(expr ${hour_remainder} % 60) ;
process_fps=$(expr 0 / ${time_distance});
echo "======================= time info ================== "
echo "= start --- $date1"
echo "=   end --- $date2"
echo "="
echo "= total --- ${hour_distance}:${min_distance}:${min_remainder}  ${process_fps} fps"
echo "="
echo "======================= time info ================== "
echo "======================= end ========================= "
echo ""