[FFmpeg-user] How to display Close Caption on the screen

Erik Gaudin erik.gaudin at cbc.ca
Thu Oct 25 16:22:13 EEST 2018

When i open our internal stream with VLC, i can displayed Substitle. But
can't find how to do it with ffplay.exe (windows)

ffplay udp://@ -analyzeduration 200
I use the last argument for low latency.

Here what appear in DOS when start FFPLAY with URL only :

Input #0, mpegts, from 'udp://@':q=    0B f=0/0
  Duration: N/A, start: 86892.634178, bitrate: N/A
  Program 2672
    Stream #0:0[0xa72]: Video: hevc (Main) ([36][0][0][0] / 0x0024),
yuv420p(tv), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94
tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0xa73](eng): Audio: aac_latm (LC) ([17][0][0][0] / 0x0011),
48000 Hz, stereo, fltp
    Stream #0:2[0xa74](fre): Audio: aac_latm (LC) ([17][0][0][0] / 0x0011),
48000 Hz, stereo, fltp

In VLC, CC are in Flux # 3  (Flux 0 = video, Flux 1 & 2 Audio track)

Erik Gaudin
Chef de projet
Société Radio-Canada (SRC)
Ingénierie Médias (Montréal)

Project Leader
Canadian Broadcasting Corporation (CBC)
Media Engineering (Montreal)

Tél. : 514-597-6586 (1-141-6586)
Cell. : 514-895-6586

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