HELP

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HELP

Erik Gaudin
How to display Close Caption on the screen  ?

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

Here what i use to display the stream : ffplay
udp://@239.255.123.1:1234 -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://@239.255.179.6:5000':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)

I try multiple argument ( like -sst) but nothing happen. Any idea ?
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Re: HELP

Paul B Mahol
On 10/25/18, Erik Gaudin <[hidden email]> wrote:

> How to display Close Caption on the screen  ?
>
> When i open our internal stream with VLC, i can displayed Substitle. But
> can't find how to do it with ffplay.exe (windows)
>
> Here what i use to display the stream : ffplay
> udp://@239.255.123.1:1234 -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://@239.255.179.6:5000':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)
>
> I try multiple argument ( like -sst) but nothing happen. Any idea ?

FFplay is very rudimentary player, it does not support subtitles or
caption out of box.

Use something much more powerful like mpv.
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Re: HELP

Erik Gaudin
In FFPLAY, there is a hot-key to switch from one substitle to the other.
When i use it, it seem to do somethin (i notice in the DOS windows the
function is receive... but no substitle.

If the Substitle is not suported, why add this function ?

I just try MPV, but the latency are not good compare to FFPLAY, and another
application i tested.

VLC, Latency issue.. it added 1 sec, and can't lower that value at all,
unless there is a command line i didn't find.





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


Le jeu. 25 oct. 2018, à 13 h 23, Paul B Mahol <[hidden email]> a écrit :

> On 10/25/18, Erik Gaudin <[hidden email]> wrote:
> > How to display Close Caption on the screen  ?
> >
> > When i open our internal stream with VLC, i can displayed Substitle. But
> > can't find how to do it with ffplay.exe (windows)
> >
> > Here what i use to display the stream : ffplay
> > udp://@239.255.123.1:1234 -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://@239.255.179.6:5000':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)
> >
> > I try multiple argument ( like -sst) but nothing happen. Any idea ?
>
> FFplay is very rudimentary player, it does not support subtitles or
> caption out of box.
>
> Use something much more powerful like mpv.
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
>
> https://clicktime.symantec.com/a/1/rzS_vLO82I7LdzzJ0UsWeXsYzQKO1-KTk_5imW6fgPM=?d=5k9OP98No2T5ZWoP7PxQtTuYuc8MztEIPvFBOStzyNRg0oTmeghYHzNPl57yldOSFXq-Ca7lw5BvNCWk8GGgx4ZXbfDKI2DA1vwBeStAX81WWWczEMCDwsWiCd8NHzV3zU9E2a76sA2UPKTf4Ah9aQZcm6Zj2L3KJjcvBaJz9R4EfN6h67FuFWSgIVMtsoD18WioGeUQ2IUvYGH9l2rCjavVB3DWna2I472dPAy8jm44okh3b339ZztoQupC47b9cn3TDiO4hedp0CnHdegKcK9gm5clrAJ0elCTmWWIFA784WQD7Ot0OzsEu2X7KSh9R3oTD0i0TQPcfy7B68bFUJprng7VOrhxxhB47BMyhvXOLInpE0htfU9-Sd-aSUaVlg8sP0OTbh48CLb2&u=http%3A%2F%2Fffmpeg.org%2Fmailman%2Flistinfo%2Fffmpeg-user
>
> To unsubscribe, visit link above, or email
> [hidden email] with subject "unsubscribe".
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Re: HELP

Paul B Mahol
On 10/25/18, Erik Gaudin <[hidden email]> wrote:
> In FFPLAY, there is a hot-key to switch from one substitle to the other.
> When i use it, it seem to do somethin (i notice in the DOS windows the
> function is receive... but no substitle.
>
> If the Substitle is not suported, why add this function ?
>
> I just try MPV, but the latency are not good compare to FFPLAY, and another
> application i tested.

How you measure latency?

>
> VLC, Latency issue.. it added 1 sec, and can't lower that value at all,
> unless there is a command line i didn't find.
>
>
>
>
>
> 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
>
>
> Le jeu. 25 oct. 2018, à 13 h 23, Paul B Mahol <[hidden email]> a écrit :
>
>> On 10/25/18, Erik Gaudin <[hidden email]> wrote:
>> > How to display Close Caption on the screen  ?
>> >
>> > When i open our internal stream with VLC, i can displayed Substitle. But
>> > can't find how to do it with ffplay.exe (windows)
>> >
>> > Here what i use to display the stream : ffplay
>> > udp://@239.255.123.1:1234 -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://@239.255.179.6:5000':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)
>> >
>> > I try multiple argument ( like -sst) but nothing happen. Any idea ?
>>
>> FFplay is very rudimentary player, it does not support subtitles or
>> caption out of box.
>>
>> Use something much more powerful like mpv.
>> _______________________________________________
>> ffmpeg-user mailing list
>> [hidden email]
>>
>> https://clicktime.symantec.com/a/1/rzS_vLO82I7LdzzJ0UsWeXsYzQKO1-KTk_5imW6fgPM=?d=5k9OP98No2T5ZWoP7PxQtTuYuc8MztEIPvFBOStzyNRg0oTmeghYHzNPl57yldOSFXq-Ca7lw5BvNCWk8GGgx4ZXbfDKI2DA1vwBeStAX81WWWczEMCDwsWiCd8NHzV3zU9E2a76sA2UPKTf4Ah9aQZcm6Zj2L3KJjcvBaJz9R4EfN6h67FuFWSgIVMtsoD18WioGeUQ2IUvYGH9l2rCjavVB3DWna2I472dPAy8jm44okh3b339ZztoQupC47b9cn3TDiO4hedp0CnHdegKcK9gm5clrAJ0elCTmWWIFA784WQD7Ot0OzsEu2X7KSh9R3oTD0i0TQPcfy7B68bFUJprng7VOrhxxhB47BMyhvXOLInpE0htfU9-Sd-aSUaVlg8sP0OTbh48CLb2&u=http%3A%2F%2Fffmpeg.org%2Fmailman%2Flistinfo%2Fffmpeg-user
>>
>> To unsubscribe, visit link above, or email
>> [hidden email] with subject "unsubscribe".
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> [hidden email] with subject "unsubscribe".
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Re: HELP

Erik Gaudin
At the bottom-right of the screen, i have the time appear here. The
computer who generate that time are in sync with the same NTP source as my
computer (using the same software).
When i play the clip from FFPLAY, VLC or the other sofware, i simply move
the screen to be near my time. Then i use snagit, and record the portion of
the screen that include both time (my PC, and the other PC who generate
it). I then open this clip on and editor, and calculate the delay between
the minute shift (record at 60 fps/sec).

Another test, to check the delay, are to open 3 player, and align the,.
Because i also have a crawling bar at the bottom (like CNN), when i allign
them, i can see who are the leader, and who is way behind everyone....

So the 100 ms sec delay i realy got, include all in the chain (network
delay, monitor delay, processing delay in the player,..).


We want to use that return for close-caption. So the "close-captionist" see
the "on-air" return of the show, but before the streamer, there is our CC
inserter device. So the close-captionnist type the new CC on our CC
software, and see the result on the computer screen, with 100ms delay
(approx).

I try VLC without luck (between 1sec and 1.5sec)






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


Le jeu. 25 oct. 2018, à 15 h 35, Paul B Mahol <[hidden email]> a écrit :

> On 10/25/18, Erik Gaudin <[hidden email]> wrote:
> > In FFPLAY, there is a hot-key to switch from one substitle to the other.
> > When i use it, it seem to do somethin (i notice in the DOS windows the
> > function is receive... but no substitle.
> >
> > If the Substitle is not suported, why add this function ?
> >
> > I just try MPV, but the latency are not good compare to FFPLAY, and
> another
> > application i tested.
>
> How you measure latency?
>
> >
> > VLC, Latency issue.. it added 1 sec, and can't lower that value at all,
> > unless there is a command line i didn't find.
> >
> >
> >
> >
> >
> > 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
> >
> >
> > Le jeu. 25 oct. 2018, à 13 h 23, Paul B Mahol <[hidden email]> a
> écrit :
> >
> >> On 10/25/18, Erik Gaudin <[hidden email]> wrote:
> >> > How to display Close Caption on the screen  ?
> >> >
> >> > When i open our internal stream with VLC, i can displayed Substitle.
> But
> >> > can't find how to do it with ffplay.exe (windows)
> >> >
> >> > Here what i use to display the stream : ffplay
> >> > udp://@239.255.123.1:1234 -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://@239.255.179.6:5000':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)
> >> >
> >> > I try multiple argument ( like -sst) but nothing happen. Any idea ?
> >>
> >> FFplay is very rudimentary player, it does not support subtitles or
> >> caption out of box.
> >>
> >> Use something much more powerful like mpv.
> >> _______________________________________________
> >> ffmpeg-user mailing list
> >> [hidden email]
> >>
> >>
> https://clicktime.symantec.com/a/1/rzS_vLO82I7LdzzJ0UsWeXsYzQKO1-KTk_5imW6fgPM=?d=5k9OP98No2T5ZWoP7PxQtTuYuc8MztEIPvFBOStzyNRg0oTmeghYHzNPl57yldOSFXq-Ca7lw5BvNCWk8GGgx4ZXbfDKI2DA1vwBeStAX81WWWczEMCDwsWiCd8NHzV3zU9E2a76sA2UPKTf4Ah9aQZcm6Zj2L3KJjcvBaJz9R4EfN6h67FuFWSgIVMtsoD18WioGeUQ2IUvYGH9l2rCjavVB3DWna2I472dPAy8jm44okh3b339ZztoQupC47b9cn3TDiO4hedp0CnHdegKcK9gm5clrAJ0elCTmWWIFA784WQD7Ot0OzsEu2X7KSh9R3oTD0i0TQPcfy7B68bFUJprng7VOrhxxhB47BMyhvXOLInpE0htfU9-Sd-aSUaVlg8sP0OTbh48CLb2&u=http%3A%2F%2Fffmpeg.org%2Fmailman%2Flistinfo%2Fffmpeg-user
> >>
> >> To unsubscribe, visit link above, or email
> >> [hidden email] with subject "unsubscribe".
> > _______________________________________________
> > ffmpeg-user mailing list
> > [hidden email]
> >
> https://clicktime.symantec.com/a/1/C0NeosO_mdWwMOCqTD1BE5Dz_SGVpY2mP8sBzlpCRN4=?d=zXedmCubfvPWCDNFNAZtXdVwKDI7vmhMAD3mFNpgrrPJXrM2TyP7jsyLvnKzve36Bgm6MGN57QgQ1Mq2juDBcqn1i-OjoHH8gZosckoL5-bj0NfAlnXRJFE08qWXD4YE6Jw6hj_smDY5kKIa4OD1OEue6o6fazUu2SKUe28XCs-Nfb5eMMUdN51m0BelHTbMN5osatxzdzpYrqWWSChXhBzOAXroBcvPn3wN450tiPkc_49UXsp3vL_-vPNXETCufL7BwTYhJpSafZMBoDwdKnPs9dRebShiYnqChr85IuClzv9vdo_f_2l7vk_30XshVVNQKcH0kB8IHcLv8WeoG5c6H7BFRLOazh2jxPOie8_HFpHQP4bJbMsAf7h7arTsfVjzvbP5wSaeWmmL&u=http%3A%2F%2Fffmpeg.org%2Fmailman%2Flistinfo%2Fffmpeg-user
> >
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