>> 
> 
> If only copy command of the document, it’s ok,
> If input string by myself, It’s have problem, cannot be used.
> 
> 
> liuqideMacBook-Pro:xxx liuqi$ ./ffmpeg -re -f lavfi -i color=red  -g 25  -b:v 
> 1000k -b:a 64k -a53cc 1 -f hls  -cc_stream_map 
> "ccgroup:cc,instreamid:CC1,language:en"   -master_pl_name master.m3u8  
> live/out.m3u8
> ffmpeg version N-89757-g42a5fe340f Copyright (c) 2000-2018 the FFmpeg 
> developers
>  built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
>  configuration: --enable-fontconfig --enable-gpl --enable-libass 
> --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libspeex 
> --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-version3 
> --cc='ccache gcc' --enable-nonfree --enable-videotoolbox
>  libavutil      56.  7.100 / 56.  7.100
>  libavcodec     58.  9.100 / 58.  9.100
>  libavformat    58.  3.100 / 58.  3.100
>  libavdevice    58.  0.100 / 58.  0.100
>  libavfilter     7. 11.101 /  7. 11.101
>  libswscale      5.  0.101 /  5.  0.101
>  libswresample   3.  0.101 /  3.  0.101
>  libpostproc    55.  0.100 / 55.  0.100
> Input #0, lavfi, from 'color=red':
>  Duration: N/A, start: 0.000000, bitrate: N/A
>    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR 
> 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
> Stream mapping:
>  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
> Press [q] to stop, [?] for help
> [libx264 @ 0x7fadae801600] using SAR=1/1
> [libx264 @ 0x7fadae801600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 
> AVX
> [libx264 @ 0x7fadae801600] profile High, level 2.0
> [libx264 @ 0x7fadae801600] 264 - core 148 r2694 3b70645 - H.264/MPEG-4 AVC 
> codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: 
> cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 
> psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 
> deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 
> sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 
> constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 
> weightb=1 open_gop=0 weightp=2 keyint=25 keyint_min=2 scenecut=40 
> intra_refresh=0 rc_lookahead=25 rc=abr mbtree=1 bitrate=1000 ratetol=1.0 
> qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
> [hls @ 0x7fadae81ec00] Opening 'live/out0.ts' for writing
> Output #0, hls, to 'live/out.m3u8':
>  Metadata:
>    encoder         : Lavf58.3.100
>    Stream #0:0: Video: h264 (libx264), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 
> q=-1--1, 1000 kb/s, 25 fps, 90k tbn, 25 tbc
>    Metadata:
>      encoder         : Lavc58.9.100 libx264
>    Side data:
>      cpb: bitrate max/min/avg: 0/0/1000000 buffer size: 0 vbv_delay: -1
> [hls @ 0x7fadae81ec00] Opening 'live/out1.ts' for writingte=N/A speed=0.514x
> [hls @ 0x7fadae81ec00] Opening 'live/out.m3u8.tmp' for writing
> [hls @ 0x7fadae81ec00] Opening 'live/master.m3u8' for writing
> [hls @ 0x7fadae81ec00] Opening 'live/out2.ts' for writingte=N/A speed=0.71x
> [hls @ 0x7fadae81ec00] Opening 'live/out.m3u8.tmp' for writing
> [hls @ 0x7fadae81ec00] Opening 'live/out3.ts' for writingte=N/A speed=0.794x
> [hls @ 0x7fadae81ec00] Opening 'live/out.m3u8.tmp' for writing
> [hls @ 0x7fadae81ec00] Opening 'live/out4.ts' for writingte=N/A speed=0.809x
> [hls @ 0x7fadae81ec00] Opening 'live/out.m3u8.tmp' for writing
> [hls @ 0x7fadae81ec00] Opening 'live/out.m3u8.tmp' for writing
> frame=  202 fps= 25 q=-1.0 Lsize=N/A time=00:00:08.00 bitrate=N/A speed=0.99x
> video:5kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing 
> overhead: unknown
> [libx264 @ 0x7fadae801600] frame I:9     Avg QP: 0.44  size:    72
> [libx264 @ 0x7fadae801600] frame P:49    Avg QP: 0.14  size:    22
> [libx264 @ 0x7fadae801600] frame B:144   Avg QP: 0.36  size:    16
> [libx264 @ 0x7fadae801600] consecutive B-frames:  5.0%  0.0%  0.0% 95.0%
> [libx264 @ 0x7fadae801600] mb I  I16..4: 100.0%  0.0%  0.0%
> [libx264 @ 0x7fadae801600] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.0%  
> 0.0%  0.0%  0.0%  0.0%    skip:100.0%
> [libx264 @ 0x7fadae801600] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%  
> 0.0%  0.0%  direct: 0.0%  skip:100.0%
> [libx264 @ 0x7fadae801600] final ratefactor: -27.54
> [libx264 @ 0x7fadae801600] 8x8 transform intra:0.0%
> [libx264 @ 0x7fadae801600] coded y,uvDC,uvAC intra: 0.0% 0.3% 0.0% inter: 
> 0.0% 0.0% 0.0%
> [libx264 @ 0x7fadae801600] i16 v,h,dc,p: 93%  0%  7%  0%
> [libx264 @ 0x7fadae801600] i8c dc,h,v,p: 100%  0%  0%  0%
> [libx264 @ 0x7fadae801600] Weighted P-Frames: Y:0.0% UV:0.0%
> [libx264 @ 0x7fadae801600] kb/s:4.05
> 
> 
> 
> liuqideMacBook-Pro:xxx liuqi$ ./ffmpeg -re -f lavfi -i color=red  -g 25  -b:v 
> 1000k -b:a 64k -a53cc 1 -f hls  -cc_stream_map 
> "closecgroup:cc,instreamid:CC1,language:en"   -master_pl_name master.m3u8  
> live/out.m3u8
> ffmpeg version N-89757-g42a5fe340f Copyright (c) 2000-2018 the FFmpeg 
> developers
>  built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
>  configuration: --enable-fontconfig --enable-gpl --enable-libass 
> --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libspeex 
> --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-version3 
> --cc='ccache gcc' --enable-nonfree --enable-videotoolbox
>  libavutil      56.  7.100 / 56.  7.100
>  libavcodec     58.  9.100 / 58.  9.100
>  libavformat    58.  3.100 / 58.  3.100
>  libavdevice    58.  0.100 / 58.  0.100
>  libavfilter     7. 11.101 /  7. 11.101
>  libswscale      5.  0.101 /  5.  0.101
>  libswresample   3.  0.101 /  3.  0.101
>  libpostproc    55.  0.100 / 55.  0.100
> Input #0, lavfi, from 'color=red':
>  Duration: N/A, start: 0.000000, bitrate: N/A
>    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR 
> 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
> Stream mapping:
>  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
> Press [q] to stop, [?] for help
> [libx264 @ 0x7fb463005800] using SAR=1/1
> [libx264 @ 0x7fb463005800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 
> AVX
> [libx264 @ 0x7fb463005800] profile High, level 2.0
> [libx264 @ 0x7fb463005800] 264 - core 148 r2694 3b70645 - H.264/MPEG-4 AVC 
> codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: 
> cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 
> psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 
> deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 
> sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 
> constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 
> weightb=1 open_gop=0 weightp=2 keyint=25 keyint_min=2 scenecut=40 
> intra_refresh=0 rc_lookahead=25 rc=abr mbtree=1 bitrate=1000 ratetol=1.0 
> qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
> [hls @ 0x7fb46383bc00] Invalid keyval closecgroup:cc
> [hls @ 0x7fb46383bc00] Variant stream info update failed with status ffffffea
> Could not write header for output file #0 (incorrect codec parameters ?): 
> Invalid argument
> Error initializing output stream 0:0 --
> [libx264 @ 0x7fb463005800] final ratefactor: 17.61
> Conversion failed!
> liuqideMacBook-Pro:xxx liuqi$
> 
> 


I cannot sure use -cc_stream_map_ccgroup option is ok, because the ccgroup 
string is not standard, maybe it can be defined bu user.
Maybe two ways:
1. use -cc_stream_map_ccgroup ? this way is defined the name by ffmpeg, cannot 
modify.
2. parse the closed captions group string by KeyValue way? maybe this is better.

Thanks

Steven



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