[FFmpeg-user] Read EIA-608 captions and re-mux into Mpegts as stream

[lyncher at sapo.pt]

On 29-05-2017 4:35, Tim DeNike wrote:
> Im successfully transcoding a udp input MPEG2 TS stream into h264 with
> NVENC and multicasting it onto the network.. The last piece of the puzzle
> is to be able to read in the EIA-608 embedded CCs in the original video
> stream and re-mux into the output TS as a separate stream.
>
> I can't seem to figure out how to do it.. I can pull out the EIA-608
> captions but not simultaneously add them as a stream in the final TS file
> while transcoding video and copying audio.
>
> Im sure there is some way to do it.  I just can't figure out how.
>
>   Here is my command line for the transcode without CC:
>
> /usr/local/bin/ffmpeg -threads auto -i "udp://
> 10.98.98.251:50029?fifo_size=262144&buffer_size=262144&overrun_nonfatal=1"
> -ss 00:00:10 -vf yadif=0:-1:0 -s hd1080 -c:v h264_nvenc -level:v 4
> -profile:v high -maxrate 10000k -bf 4 -preset:v llhp -rc-lookahead 250
> -rc:v ll_2pass_size -c:a copy -packetsize 1316 -avioflags direct -max_delay
> 0 -f mpegts udp://239.33.35.201:1234
>
>
> Version info:
>
> ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
>    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
>    configuration: --extra-libs=-ldl
> --extra-cflags='-I/root/sources/nvenc/Video_Codec_SDK_7.0.1/Samples/common/inc
> -I/root/sources/bmsdk1054/Linux/include' --enable-gpl --enable-nonfree
> --enable-nvenc --enable-libfdk_aac --enable-libmp3lame --enable-libvorbis
> --enable-libx264 --disable-libtheora --pkg-config=pkg-config --cpu=host
> --enable-libzvbi --enable-libass --enable-decklink --enable-libnut
> --enable-openssl --disable-ffserver --enable-cuda --enable-cuvid
>    libavutil      55. 58.100 / 55. 58.100
>    libavcodec     57. 89.100 / 57. 89.100
>    libavformat    57. 71.100 / 57. 71.100
>    libavdevice    57.  6.100 / 57.  6.100
>    libavfilter     6. 82.100 /  6. 82.100
>    libswscale      4.  6.100 /  4.  6.100
>    libswresample   2.  7.100 /  2.  7.100
>    libpostproc    54.  5.100 / 54.  5.100
>
>
> Any help would be appreciated.
>
> Thanks!
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What is the command line that  you're using to extract EIA-608 from the 
stream?