[FFmpeg-user] Can't make video filter drawtext accept command from multi media filter zmq
Paul B Mahol
onemda at gmail.com
Mon Jun 22 20:55:23 CEST 2015
On 6/22/15, Thomas Seilund <tps at netmaster.dk> wrote:
> Paul B Mahol writes:
>
>> On 6/22/15, Thomas Seilund <tps at netmaster.dk> wrote:
>>> Paul B Mahol writes:
>>>
>>>> On 6/22/15, Thomas Seilund <tps at netmaster.dk> wrote:
>>>>> Hi All
>>>>>
>>>>> I always get error "38 Function not implemented" when I send command
>>>>> to
>>>>> video filter drawtext.
>>>>>
>>>>> Here is the command I run and the result I get:
>>>>>
>>>>> tps at t420:~/video/test$ echo Parsed_drawtext_1 text AA |
>>>>> /home/tps/data/data/ffmpeg/tools/zmqsend -b tcp://127.0.0.1:5557
>>>>> 38 Function not implemented
>>>>> tps at t420:~/video/test$
>>>>>
>>>>> I run the command while I have this ffmpeg instance running:
>>>>>
>>>>> tps at t420:~/video/test$ ffmpeg -loop 1 -i test.png -filter_complex
>>>>> "zmq=bind_address=tcp\\\://127.0.0.1\\\:
>>>>> 5557,drawtext=text=AA:x=50:y=50:fontfile=/usr/share/fonts/truetype/freefont/
>>>>>
>>>>> FreeMonoBold.ttf" -f mpegts -c libx264 test.ts
>>>>> ffmpeg version N-69238-g2699a37 Copyright (c) 2000-2015 the FFmpeg
>>>>> developers
>>>>> built on Apr 23 2015 17:10:30 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
>>>>> configuration: --enable-gpl --enable-libmp3lame --enable-libvpx
>>>>> --enable-
>>>>>
>>>>> libx264 --enable-version3 --enable-libvorbis --enable-libfreetype
>>>>> --enable-
>>>>>
>>>>> libv4l2 --enable-libfdk-aac --enable-nonfree --enable-libpulse
>>>>> --enable-
>>>>> libzmq
>>>>> libavutil 54. 17.100 / 54. 17.100
>>>>> libavcodec 56. 20.100 / 56. 20.100
>>>>> libavformat 56. 19.100 / 56. 19.100
>>>>> libavdevice 56. 4.100 / 56. 4.100
>>>>> libavfilter 5. 8.101 / 5. 8.101
>>>>> libswscale 3. 1.101 / 3. 1.101
>>>>> libswresample 1. 1.100 / 1. 1.100
>>>>> libpostproc 53. 3.100 / 53. 3.100
>>>>> Input #0, png_pipe, from 'scoreboard.png':
>>>>> Duration: N/A, bitrate: N/A
>>>>> Stream #0:0: Video: png, pal8, 200x100 [SAR 72:72 DAR 2:1], 25
>>>>> fps,
>>>>> 25
>>>>>
>>>>> tbr, 25 tbn, 25 tbc
>>>>> File 'test.ts' already exists. Overwrite ? [y/N] y
>>>>> No pixel format specified, yuv444p for H.264 encoding chosen.
>>>>> Use -pix_fmt yuv420p for compatibility with outdated media players.
>>>>> [libx264 @ 0x2d2c4c0] using SAR=1/1
>>>>> [libx264 @ 0x2d2c4c0] using cpu capabilities: MMX2 SSE2Fast SSSE3
>>>>> SSE4.2
>>>>> AVX
>>>>> [libx264 @ 0x2d2c4c0] profile High 4:4:4 Predictive, level 1.1, 4:4:4
>>>>> 8-bit
>>>>> Output #0, mpegts, to 'test.ts':
>>>>> Metadata:
>>>>> encoder : Lavf56.19.100
>>>>> Stream #0:0: Video: h264 (libx264), yuv444p, 200x100 [SAR 1:1 DAR
>>>>> 2:1],
>>>>>
>>>>> q=-1--1, 25 fps, 90k tbn, 25 tbc
>>>>> Metadata:
>>>>> encoder : Lavc56.20.100 libx264
>>>>> Stream mapping:
>>>>> Stream #0:0 (png) -> zmq
>>>>> drawtext -> Stream #0:0 (libx264)
>>>>> Press [q] to stop, [?] for help
>>>>> frame=14512 fps=1948 q=-1.0 Lsize= 2947kB time=00:09:40.40 bitrate=
>>>>> 41.6kbits/s
>>>>> video:351kB audio:0kB subtitle:0kB other streams:0kB global
>>>>> headers:0kB
>>>>> muxing overhead: 739.239502%
>>>>>
>>>>>
>>>>>
>>>>> Any help would be very much appreciated
>>>>
>>>> Looking at code command must be reinit and args are normal args you
>>>> usual give to drawtext filter.
>>>>
>>>> But example with drawtext and zmq should really be added to docs.
>>>>
>>>>>
>>>>> Thanks
>>>>>
>>>>> Thomas S
>>>>> _______________________________________________
>>>>> ffmpeg-user mailing list
>>>>> ffmpeg-user at ffmpeg.org
>>>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>>>>
>>>> _______________________________________________
>>>> ffmpeg-user mailing list
>>>> ffmpeg-user at ffmpeg.org
>>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>>
>>>
>>> Hi Paul,
>>>
>>> Thanks a lot - it works - but it is slow !!
>>>
>>> Now I run ffmpeg and pipe to ffplay to see the effect of the command.
>>>
>>> I run this ffmpeg command:
>>>
>>> tps at t420:~/video/test$ ffmpeg -loglevel debug -loop 1 -i test.png -
>>> filter_complex "zmq=bind_address=tcp\\\://127.0.0.1\\\:
>>> 5557,drawtext=text=XX:x=50:y=50:fontfile=/usr/share/fonts/truetype/freefont/
>>>
>>> FreeMonoBold.ttf" -f mpegts -c libx264 - | ffplay -i -
>>>
>>> And I run this command to change the drawtext filter:
>>>
>>> tps at t420:~/video/test$ echo Parsed_drawtext_1 reinit text=CC |
>>> /home/tps/data/data/ffmpeg/tools/zmqsend -b tcp://127.0.0.1:5557
>>>
>>> There is a delay of 10+ seconds from I run the command until I see the
>>> effect in ffplay.
>>>
>>> I had hoped for instant effect - can I do something to get instant effect
>>> ?
>>
>> Perhaps encoding and drawing text is not realtime at all? Try encoding
>> with -preset ultrafast
>>>
>>> Thanks for you help
>>>
>>> Thomas S
>>> _______________________________________________
>>> ffmpeg-user mailing list
>>> ffmpeg-user at ffmpeg.org
>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>>
>> _______________________________________________
>> ffmpeg-user mailing list
>> ffmpeg-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
>
> Hi Paul
>
> Now I use -preset ultrafast and -re to encode real time.
>
> Here is the command:
>
> ffmpeg -re -y -loop 1 -i test.png -filter_complex
> "zmq=bind_address=tcp\\\://127.0.0.1\\\:
> 5557,drawtext=text=XX:x=50:y=50:fontfile=/usr/share/fonts/truetype/freefont/
>
> FreeMonoBold.ttf" -f mpegts -c libx264 -preset ultrafast test.ts
>
> As the ffmpeg command run I can see the number of seconds encoded.
>
> When that number reaches 10 seconds I run the command:
>
> echo Parsed_drawtext_1 reinit text=CC |
> /home/tps/data/data/ffmpeg/tools/zmqsend -b tcp://127.0.0.1:5557
>
> Then I let the ffmpeg command run 10 seconds more.
>
> When I replay the encoded file with ffplay I see the number of seconds
> replayed.
>
> I expected to see new text from the drawtext filter after 10 seconds but
> the change did not occur until 12 seconds had passed - that is 2 seconds
> later that expected.
>
> Perhaps your right - it is not a real time event ?
You want it to be almost instant? Dunno what is slower libx264 encoding
or drawtext filter.
>
> Thanks
>
> Thomas S
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
More information about the ffmpeg-user
mailing list