Hi,
I have been attempting to get alternative audio tracks working with HLS.
The source video file I am using has 3 audio tracks on it, that I have confirmed works correctly if I use http:/…/xyz/mp4:video.mp4/playlist.m3u8?audioindex=#
So i have reason to believe there shouldn’t be an issue with the video file it self. Here is an ffprobe output:
ffprobe version N-64216-ga30f1b1 Copyright (c) 2007-2014 the FFmpeg developers
built on Jun 24 2014 22:31:41 with gcc 4.8.3 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
libavutil 52. 90.101 / 52. 90.101
libavcodec 55. 68.100 / 55. 68.100
libavformat 55. 44.100 / 55. 44.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 9.100 / 4. 9.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ‘C:\gt\server-based\media\private\t1m\549190108530450\466003738621220\466003738621220.pc.mp4’:
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf55.44.100
Duration: 00:01:41.78, start: 0.000000, bitrate: 1888 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1272x720 [SAR 160:159 DAR 16:9], 1499 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 124 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(fra): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s
Metadata:
handler_name : SoundHandler
Stream #0:3(deu): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s
Metadata:
handler_name : SoundHandler
Using the single file sample SMIL file, I receive no audio from every player I’ve used so far. In VLC, there is one audio track (selected by default).
Here is the playlist.m3u8 outputed from Wowza:
#EXTM3U #EXT-X-VERSION:3 #EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac",LANGUAGE="en",NAME="English",DEFAULT=YES,AUTOSELECT=YES,URI="chunklist_w1134224132_b44100_ao_slen_t64RW5nbGlzaA==.m3u8?audioindex=1" #EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac",LANGUAGE="de",NAME="Deutsch",DEFAULT=FALSE,AUTOSELECT=YES,URI="chunklist_w1134224132_b44100_ao_slde_t64RGV1dHNjaA==.m3u8?audioindex=1" #EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac",LANGUAGE="fr",NAME="Francais",DEFAULT=FALSE,AUTOSELECT=YES,URI="chunklist_w1134224132_b44100_ao_slfr_t64RnJhbmNhaXM=.m3u8?audioindex=1" #EXT-X-STREAM-INF:BANDWIDTH=1100000,CODECS="avc1.66.10",RESOLUTION=640x360,AUDIO="aac" chunklist_w1134224132_b1100000_vo.m3u8?audioindex=1So to sum it all up, adjusting my .smil file to mimic https://www.wowza.com/docs/how-to-use-alternative-audio-or-video-tracks-with-apple-hls-streams#singlefile causes 0 audio output for me. Instead of showing 3 tracks in the video player, it shows just 1 and that 1 has no audio output.
Can anyone help? Has anyone else had success with adaptive streaming using HLS that also include multiple audio tracks?
Any help would be great!
Thank you,
Tim