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首页 > 解决方案 > FFMPEG HLS 带有 var_stream_map 的多种音频语言 - EXT-X-MEDIA:TYPE 不包含 LANGUAGE

ffmpeg - FFMPEG HLS 带有 var_stream_map 的多种音频语言 - EXT-X-MEDIA:TYPE 不包含 LANGUAGE

问题描述

我有一个问题涉及使用 FFMPEG 的 HLS 上的多种音频语言。

我目前正在使用以下命令将具有多种音频语言的传输流混合到具有主播放列表的 HLS 流中：

ffmpeg -re -i $INPUT_URL -map 0:v -c:v copy -map 0:a -c:a copy -f hls -hls_time 6 -hls_list_size 10 -hls_flags delete_segments+program_date_time -hls_segment_filename "$FULL_OUTPUT_FOLDER/stream_%v_%d.ts" -var_stream_map "v:0,agroup:groupname a:0,agroup:groupname a:1,agroup:groupname a:2,agroup:groupname a:3,agroup:groupname" -master_pl_name master.m3u8 $FULL_OUTPUT_FOLDER/stream-%v.m3u8

此命令的输出如下所示：

ffmpeg version 4.0.3-1~16.04.york0 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
[mpegts @ 0x55c8cb7fee40] start time for stream 5 is not set in estimate_timings_from_pts
[mpegts @ 0x55c8cb7fee40] start time for stream 6 is not set in estimate_timings_from_pts                                                                                          
[mpegts @ 0x55c8cb7fee40] start time for stream 7 is not set in estimate_timings_from_pts                                                                                          
Input #0, mpegts, from '/home/user/Videos/output/example.ts':
  Duration: 00:37:50.26, start: 1.498667, bitrate: 1257 kb/s
  Program 1 
    Metadata:
      service_name    : example
      service_provider: FFmpeg
    Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 696x572 [SAR 64:45 DAR 3712:2145], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x101](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 159 kb/s
    Stream #0:2[0x102](fra): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 126 kb/s
    Stream #0:3[0x103](ita): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 132 kb/s
    Stream #0:4[0x104](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 132 kb/s
    Stream #0:5[0x105](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
    Stream #0:6[0x106](fra): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
    Stream #0:7[0x107](deu): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_0_0.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_1_0.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_2_0.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_3_0.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_4_0.ts' for writing
[mpegts @ 0x55c8cb880380] frame size not set
[mpegts @ 0x55c8cb882040] frame size not set                                                                                                                                       
[mpegts @ 0x55c8cb8837c0] frame size not set                                                                                                                                       
[mpegts @ 0x55c8cb885280] frame size not set                                                                                                                                       
Output #0, hls, to '/var/www/html/live/stream-%v.m3u8':
  Metadata:
    encoder         : Lavf58.12.100
    Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 696x572 [SAR 64:45 DAR 3712:2145], q=2-31, 25 fps, 25 tbr, 90k tbn, 25 tbc
    Stream #0:1(eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 159 kb/s
    Stream #0:2(fra): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 126 kb/s
    Stream #0:3(ita): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 132 kb/s
    Stream #0:4(eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 132 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #0:2 -> #0:2 (copy)
  Stream #0:3 -> #0:3 (copy)
  Stream #0:4 -> #0:4 (copy)
Press [q] to stop, [?] for help
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_1_1.ts' for writing    
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-1.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_2_1.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-2.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_3_1.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-3.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_4_1.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-4.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_1_2.ts' for writing   
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-1.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_2_2.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-2.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_3_2.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-3.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_4_2.ts' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-4.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_0_1.ts' for writing   
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-0.m3u8.tmp' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/master.m3u8' for writing
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream_1_3.ts' for writing   
[hls @ 0x55c8cb834980] Opening '/var/www/html/live/stream-1.m3u8.tmp' for writing

此命令输出的主播放列表如下所示：

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_groupname",NAME="audio_0",DEFAULT=YES,URI="stream-1.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_groupname",NAME="audio_0",DEFAULT=YES,URI="stream-2.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_groupname",NAME="audio_0",DEFAULT=YES,URI="stream-3.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_groupname",NAME="audio_0",DEFAULT=YES,URI="stream-4.m3u8"
#EXT-X-STREAM-INF:BANDWIDTH=174900,RESOLUTION=696x572,AUDIO="group_groupname"
stream-0.m3u8

#EXT-X-STREAM-INF:BANDWIDTH=174900,CODECS="mp4a.40.2",AUDIO="group_groupname"
stream-1.m3u8

#EXT-X-STREAM-INF:BANDWIDTH=174900,CODECS="mp4a.40.2",AUDIO="group_groupname"
stream-2.m3u8

#EXT-X-STREAM-INF:BANDWIDTH=174900,CODECS="mp4a.40.2",AUDIO="group_groupname"
stream-3.m3u8

#EXT-X-STREAM-INF:BANDWIDTH=174900,CODECS="mp4a.40.2",AUDIO="group_groupname"
stream-4.m3u8

虽然这似乎适用于 VLC，但我需要 EXT-X-MEDIA:TYPE 标记来包含 LANGUAGE 属性。（我正在使用的播放器使用它来解析音轨的语言）根据我找到的文档，我无法弄清楚如何做到这一点。

谁能帮我解决这个问题？

谢谢！

标签： ffmpeg

解决方案

查看源代码后，我发现这根本不支持（还没有？）

在代码中，您可以找到以下功能：

[libavformat/hlsenc.c] create_master_playlist

[libavformat/hlsplaylist.c] ff_hls_write_audio_rendition

查看这些实现时，您会发现 LANGUAGE 属性实际上从未真正输出过。

所以这意味着我必须找到另一种方法来实现这一点。

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