hls直播拉流时,有时候有声音，有时候没有声音

同一个播放串有时候有声音，有时候没有声音
http://182.138.52.138/PLTV/88888920/224/3221225577/index.m3u8?rrsip=182.138.52.138&servicetype=1&icpid=&accounttype=1&limitflux=-1&limitdur=-1&GuardEncType=2&accountinfo=oPP826WfjWxl95QCOWbmEBF7FTdqhw%2FHEapE5Mj9YSzY5T%2BUU%2F75TS8Ic5fDvGruMTyaTC5H%2BWB%2FqDbwEEtd1Inmr01dcAL4eOxDqlLB95metA30CfIDMQIJVOKLZu5N%3A20170616114806%2Cguest%2C221.237.114.185%2C20170616114806%2C10000100000000050000000000000061%2CA31A43357A1F2CFF2A7740122344CE61%2C-1%2C0%2C1%2C-1%2C%2C2%2C001%2C3%2C%2C2%2CEND

//没有声音时的log
[FFPlayer @ 0x7ff35f844a00] max_frame_duration: 10.000
Input #0, hls,applehttp, from 'http://182.138.52.138/PLTV/88888920/224/3221225577/index.m3u8?rrsip=182.138.52.138&servicetype=1&icpid=&accounttype=1&limitflux=-1&limitdur=-1&GuardEncType=2&accountinfo=oPP826WfjWxl95QCOWbmEBF7FTdqhw%2FHEapE5Mj9YSzY5T%2BUU%2F75TS8Ic5fDvGruMTyaTC5H%2BWB%2FqDbwEEtd1Inmr01dcAL4eOxDqlLB95metA30CfIDMQIJVOKLZu5N%3A20170616114806%2Cguest%2C221.237.114.185%2C20170616114806%2C10000100000000050000000000000061%2CA31A43357A1F2CFF2A7740122344CE61%2C-1%2C0%2C1%2C-1%2C%2C2%2C001%2C3%2C%2C2%2CEND':
Duration: N/A, start: 75368.919578, bitrate: N/A
Program 0
Metadata:
variant_bitrate : 2048000
Stream #0:0, 0, 1/90000: Video: h264, 1 reference frame ([27][0][0][0] / 0x001B), none(left), 90k tbr, 90k tbn, 180k tbc
Metadata:
variant_bitrate : 2048000
Stream #0:1, 0, 1/90000: Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp
Metadata:
variant_bitrate : 2048000
Program 1
Metadata:
variant_bitrate : 1024000
Stream #0:2, 127, 1/90000: Video: h264 (High), 1 reference frame ([27][0][0][0] / 0x001B), yuv420p(tv, left), 720x576 [SAR 64:45 DAR 16:9], 0/1, 25 fps, 25 tbr, 90k tbn, 50 tbc
Metadata:
variant_bitrate : 1024000
Stream #0:3, 120, 1/90000: Audio: aac (HE-AAC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 1024000
multiple video stream found, prefer first h264 stream: 0

//有声音时的log
[FFPlayer @ 0x7fab9a069000] max_frame_duration: 10.000
Input #0, hls,applehttp, from 'http://182.138.52.138/PLTV/88888920/224/3221225577/index.m3u8?rrsip=182.138.52.138&servicetype=1&icpid=&accounttype=1&limitflux=-1&limitdur=-1&GuardEncType=2&accountinfo=oPP826WfjWxl95QCOWbmEBF7FTdqhw%2FHEapE5Mj9YSzY5T%2BUU%2F75TS8Ic5fDvGruMTyaTC5H%2BWB%2FqDbwEEtd1Inmr01dcAL4eOxDqlLB95metA30CfIDMQIJVOKLZu5N%3A20170616114806%2Cguest%2C221.237.114.185%2C20170616114806%2C10000100000000050000000000000061%2CA31A43357A1F2CFF2A7740122344CE61%2C-1%2C0%2C1%2C-1%2C%2C2%2C001%2C3%2C%2C2%2CEND':
Duration: N/A, start: 79808.919578, bitrate: N/A
Program 0
Metadata:
variant_bitrate : 2048000
Stream #0:0, 127, 1/90000: Video: h264 (High), 1 reference frame ([27][0][0][0] / 0x001B), yuv420p(tv, left), 1280x720 [SAR 1:1 DAR 16:9], 0/1, 25 fps, 25 tbr, 90k tbn, 50 tbc
Metadata:
variant_bitrate : 2048000
Stream #0:1, 120, 1/90000: Audio: aac (HE-AAC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 2048000
Program 1
Metadata:
variant_bitrate : 1024000
Stream #0:2, 0, 1/90000: Video: h264, 1 reference frame ([27][0][0][0] / 0x001B), none(left), 90k tbr, 90k tbn, 180k tbc
Metadata:
variant_bitrate : 1024000
Stream #0:3, 0, 1/90000: Audio: aac ([15][0][0][0] / 0x000F), 0 channels, fltp
Metadata:
variant_bitrate : 1024000
multiple video stream found, prefer first h264 stream: 0

No source file or test is named. Start by reproducing HLS playback with the supplied URL and compare stream selection between the logs, especially the AAC streams and selected programs. Done when the cause of intermittent audio is isolated and consistent audio playback is validated.

Written by the indexing model from the issue text.