[FFmpeg-user] drawtext filter use with stream output?
Raghu Ram
iamanonymouscoward at gmail.com
Wed Sep 4 20:08:06 CEST 2013
I too experienced this problem. I think, somewhere, internally, if you are
outputting it to a stream, the code will ignore drawtext or writing
subtitles directives. I have been trying to make "stock ticker" type
overlay for my videos and this problem stonewalled me.
If you find a work around, please let me know.
On Wed, Sep 4, 2013 at 8:46 AM, Alex Morris <axman.5389 at gmail.com> wrote:
> Hello
>
> Thank you to the developers for this software, and to the user
> community for support.
>
> Question: When using the drawtext filter, is different syntax
> required when the final output is a stream?
>
> I searched this list but did not see a similar issue.. Perhaps I did
> not search well enough..
>
> Using ffmpeg version 2.0 compiled from Sept 3, 2013 snapshot. I
> capture live NTSC from a GoPro with ffmpeg. I stream it to ffserver.
> The capture and output stream works. I would like to overlay the date
> and time into the final output stream before sending to ffserver.
>
> If I output to a file, (flv in my test case) the drawtext filter works
> perfectly. Date and time are overlayed into the resulting flv file,
> ffplay and vlc both show it nicely.
>
> If I output to a stream, there is no text overlay visible in the
> output stream displayed. (ffserver receives it, and ffplay can
> consume it from that ffserver, and plays it fine. just no text
> overlay. same with vlc as client.)
>
> I run tests with -debug 1 and it shows that my syntax is correct. I
> think. But it does not show any hints about why the drawtext filter
> is not included in the output.
>
> Any clue is appreciated.
>
> Kind regards,
> Alex
>
>
> command
> --------
> /usr/local/bin/ffmpeg -debug 1 -f alsa -r 48000 -ac 2 -channel_layout
> stereo -i hw:0 -f v4l2 -channel 1 -pix_fmt uyvy422 -i /dev/video0 -vf
> drawtext="/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf:
> text='%{localtime\:%F_%T}': x=20: y=20: fontsize=24: fontcolor=green:
> fontsize=24" -c:a libmp3lame -b:a 128k -ar 44100 -ac 2 -c:v flv -b:v
> 768k -s 720x480 -r 30 http://192.168.1.105:8092/test.flv 2>
> /home/ajm/scripts/ffmpeg_log.txt
>
> gives these results
> --------
> ffmpeg version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
> built on Sep 2 2013 11:52:39 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
> configuration: --enable-libfaac --enable-libmp3lame
> --enable-libopenjpeg --enable-libtheora --enable-libv4l2
> --enable-libvorbis --enable-libxvid --enable-gpl --enable-nonfree
> --enable-static --enable-librtmp --enable-libtwolame --enable-x11grab
> --enable-libvpx --enable-libx264 --enable-fontconfig
> --enable-libfreetype
> libavutil 52. 42.100 / 52. 42.100
> libavcodec 55. 29.100 / 55. 29.100
> libavformat 55. 14.102 / 55. 14.102
> libavdevice 55. 3.100 / 55. 3.100
> libavfilter 3. 82.102 / 3. 82.102
> libswscale 2. 5.100 / 2. 5.100
> libswresample 0. 17.103 / 0. 17.103
> libpostproc 52. 3.100 / 52. 3.100
> matched as AVOption 'debug' with argument '1'.
> Reading option '-f' ... matched as option 'f' (force format) with
> argument 'alsa'.
> Reading option '-r' ... matched as option 'r' (set frame rate (Hz
> value, fraction or abbreviation)) with argument '48000'.
> Reading option '-ac' ... matched as option 'ac' (set number of audio
> channels) with argument '2'.
> Reading option '-channel_layout' ... matched as option
> 'channel_layout' (set channel layout) with argument 'stereo'.
> Reading option '-i' ... matched as input file with argument 'hw:0'.
> Reading option '-f' ... matched as option 'f' (force format) with
> argument 'v4l2'.
> Reading option '-channel' ... matched as AVOption 'channel' with argument
> '1'.
> Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel
> format) with argument 'uyvy422'.
> Reading option '-i' ... matched as input file with argument '/dev/video0'.
> Reading option '-vf' ... matched as option 'vf' (set video filters)
> with argument
> 'drawtext=/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf:
> text='%{localtime\:%F_%T}': x=20: y=20: fontsize=24: fontcolor=green:
> fontsize=24'.
> Reading option '-c:a' ... matched as option 'c' (codec name) with
> argument 'libmp3lame'.
> Reading option '-b:a' ... matched as option 'b' (video bitrate (please
> use -b:v)) with argument '128k'.
> Reading option '-ar' ... matched as option 'ar' (set audio sampling
> rate (in Hz)) with argument '44100'.
> Reading option '-ac' ... matched as option 'ac' (set number of audio
> channels) with argument '2'.
> Reading option '-c:v' ... matched as option 'c' (codec name) with
> argument 'flv'.
> Reading option '-b:v' ... matched as option 'b' (video bitrate (please
> use -b:v)) with argument '768k'.
> Reading option '-s' ... matched as option 's' (set frame size (WxH or
> abbreviation)) with argument '720x480'.
> Reading option '-r' ... matched as option 'r' (set frame rate (Hz
> value, fraction or abbreviation)) with argument '30'.
> Reading option 'http://192.168.1.105:8092/feed2.ffm' ... matched as
> output file.
> Finished splitting the commandline.
> Parsing a group of options: global .
> Successfully parsed a group of options.
> Parsing a group of options: input file hw:0.
> Applying option f (force format) with argument alsa.
> Applying option r (set frame rate (Hz value, fraction or
> abbreviation)) with argument 48000.
> Applying option ac (set number of audio channels) with argument 2.
> Applying option channel_layout (set channel layout) with argument stereo.
> Successfully parsed a group of options.
> Opening an input file: hw:0.
> [alsa @ 0x1ad1ba0] All info found
> Input #0, alsa, from 'hw:0':
> Duration: N/A, start: 1378236996.360348, bitrate: 1536 kb/s
> Stream #0:0, 1, 1/1000000: Audio: pcm_s16le, 48000 Hz, stereo,
> s16, 1536 kb/s
> Successfully opened the file.
> Parsing a group of options: input file /dev/video0.
> Applying option f (force format) with argument v4l2.
> Applying option pix_fmt (set pixel format) with argument uyvy422.
> Successfully parsed a group of options.
> Opening an input file: /dev/video0.
> [video4linux2,v4l2 @ 0x1ae35c0] fd:4 capabilities:5030011
> [video4linux2,v4l2 @ 0x1ae35c0] Selecting input_channel: 1
> [video4linux2,v4l2 @ 0x1ae35c0] Current input_channel: 1, input_name:
> Composite
> [video4linux2,v4l2 @ 0x1ae35c0] Querying the device for the current frame
> size
> [video4linux2,v4l2 @ 0x1ae35c0] Setting frame size to 720x480
> [video4linux2,v4l2 @ 0x1ae35c0] The V4L2 driver is using the interlaced
> mode
> [video4linux2,v4l2 @ 0x1ae35c0] Current standard: NTSC-M, id: 4096,
> frameperiod: 1001/30000
> [video4linux2,v4l2 @ 0x1ae35c0] All info found
> Input #1, video4linux2,v4l2, from '/dev/video0':
> Duration: N/A, start: 1378236997.016181, bitrate: 165722 kb/s
> Stream #1:0, 1, 1/1000000: Video: rawvideo (UYVY / 0x59565955),
> uyvy422, 720x480, 1/1000000, 165722 kb/s, 29.97 fps, 29.97 tbr, 1000k
> tbn, 1000k tbc
> Successfully opened the file.
> Parsing a group of options: output file
> http://192.168.1.105:8092/feed2.ffm.
> Applying option vf (set video filters) with argument
> drawtext=/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf:
> text='%{localtime\:%F_%T}': x=20: y=20: fontsize=24: fontcolor=green:
> fontsize=24.
> Applying option c:a (codec name) with argument libmp3lame.
> Applying option b:a (video bitrate (please use -b:v)) with argument 128k.
> Applying option ar (set audio sampling rate (in Hz)) with argument 44100.
> Applying option ac (set number of audio channels) with argument 2.
> Applying option c:v (codec name) with argument flv.
> Applying option b:v (video bitrate (please use -b:v)) with argument 768k.
> Applying option s (set frame size (WxH or abbreviation)) with argument
> 720x480.
> Applying option r (set frame rate (Hz value, fraction or
> abbreviation)) with argument 30.
> Successfully parsed a group of options.
> Opening an output file: http://192.168.1.105:8092/feed2.ffm.
> [ffm @ 0x1ae7c80] Format ffm probed with size=2048 and score=101
> [AVIOContext @ 0x1ae59c0] Statistics: 4096 bytes read, 0 seeks
> Successfully opened the file.
> detected 4 logical cores
> [graph 0 input from stream 0:0 @ 0x1aef1c0] Setting 'time_base' to
> value '1/48000'
> [graph 0 input from stream 0:0 @ 0x1aef1c0] Setting 'sample_rate' to
> value '48000'
> [graph 0 input from stream 0:0 @ 0x1aef1c0] Setting 'sample_fmt' to value
> 's16'
> [graph 0 input from stream 0:0 @ 0x1aef1c0] Setting 'channel_layout'
> to value '0x3'
> [graph 0 input from stream 0:0 @ 0x1aef1c0] tb:1/48000 samplefmt:s16
> samplerate:48000 chlayout:0x3
> [audio format for output stream 0:0 @ 0x1ae7c80] Setting 'sample_fmts'
> to value 's32p'
> [audio format for output stream 0:0 @ 0x1ae7c80] Setting
> 'sample_rates' to value '44100'
> [audio format for output stream 0:0 @ 0x1ae7c80] Setting
> 'channel_layouts' to value '0x3'
> [audio format for output stream 0:0 @ 0x1ae7c80] auto-inserting filter
> 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and
> the filter 'audio format for output stream 0:0'
> [AVFilterGraph @ 0x1aeb700] query_formats: 4 queried, 6 merged, 3
> already done, 0 delayed
> [auto-inserted resampler 0 @ 0x1abbd00] ch:2 chl:stereo fmt:s16
> r:48000Hz -> ch:2 chl:stereo fmt:s32p r:44100Hz
> [graph 1 input from stream 1:0 @ 0x1ae9680] Setting 'video_size' to
> value '720x480'
> [graph 1 input from stream 1:0 @ 0x1ae9680] Setting 'pix_fmt' to value '17'
> [graph 1 input from stream 1:0 @ 0x1ae9680] Setting 'time_base' to
> value '1/1000000'
> [graph 1 input from stream 1:0 @ 0x1ae9680] Setting 'pixel_aspect' to
> value '0/1'
> [graph 1 input from stream 1:0 @ 0x1ae9680] Setting 'sws_param' to
> value 'flags=2'
> [graph 1 input from stream 1:0 @ 0x1ae9680] Setting 'frame_rate' to
> value '30000/1001'
> [graph 1 input from stream 1:0 @ 0x1ae9680] w:720 h:480 pixfmt:uyvy422
> tb:1/1000000 fr:30000/1001 sar:0/1 sws_param:flags=2
> [scaler for output stream 0:1 @ 0x1ac08a0] Setting 'w' to value '720'
> [scaler for output stream 0:1 @ 0x1ac08a0] Setting 'h' to value '480'
> [scaler for output stream 0:1 @ 0x1ac08a0] Setting 'flags' to value '0x4'
> [scaler for output stream 0:1 @ 0x1ac08a0] w:720 h:480 flags:'0x4' interl:0
> [format @ 0x1ae92e0] compat: called with args=[yuv420p]
> [format @ 0x1ae92e0] Setting 'pix_fmts' to value 'yuv420p'
> [AVFilterGraph @ 0x1ae5e60] query_formats: 5 queried, 4 merged, 0
> already done, 0 delayed
> [scaler for output stream 0:1 @ 0x1ac08a0] w:720 h:480 fmt:uyvy422
> sar:0/1 -> w:720 h:480 fmt:yuv420p sar:0/1 flags:0x4
> [flv @ 0x1aef6e0] intra_quant_bias = 0 inter_quant_bias = -64
> Output #0, ffm, to 'http://192.168.1.105:8092/feed2.ffm':
> Metadata:
> creation_time : now
> encoder : Lavf55.14.102
> Stream #0:0, 0, 1/1000000: Audio: mp3 (libmp3lame), 44100 Hz,
> stereo, s32p, 128 kb/s
> Stream #0:1, 0, 1/1000000: Video: flv1 (flv), yuv420p, 720x480,
> 1001/30000, q=2-31, 768 kb/s, 1000k tbn, 29.97 tbc
> Stream mapping:
> Stream #0:0 -> #0:0 (pcm_s16le -> libmp3lame)
> Stream #1:0 -> #0:1 (rawvideo -> flv)
> Press [q] to stop, [?] for help
> [alsa @ 0x1ad1ba0] ALSA buffer xrun.
> *** 2 dup!
> Last message repeated 6 times
> frame= 22 fps=0.0 q=12.4 size= 200kB time=00:00:00.99
> bitrate=1653.7kbits*** 2 dup!drop=0
> Last message repeated 2 times
> [alsa @ 0x1ad1ba0] ALSA buffer xrun.
> *** 2 dup!
> frame= 34 fps= 29 q=20.6 size= 252kB time=00:00:01.13
> bitrate=1819.7kbits*** 2 dup!drop=0
> Last message repeated 5 times
> frame= 52 fps= 30 q=20.0 size= 360kB time=00:00:02.04
> bitrate=1440.8kbits*** 2 dup!drop=0
> Last message repeated 3 times
> [alsa @ 0x1ad1ba0] ALSA buffer xrun.
> frame= 64 fps= 28 q=21.5 size= 420kB time=00:00:02.13
> bitrate=1611.2kbits*** 2 dup!drop=0
> Last message repeated 3 times
> *** 1 dup!
> frame= 79 fps= 28 q=19.5 size= 504kB time=00:00:03.18
> bitrate=1295.0kbitsframe= 82 fps= 22 q=20.1 size= 544kB
> time=00:00:03.18 bitrate=1397.8kbits[alsa @ 0x1ad1ba0] ALSA buffer
> xrun.
> *** 9 dup!
> frame= 126 fps= 30 q=4.3 size= 696kB time=00:00:04.85
> bitrate=1175.1kbits/frame= 132 fps= 28 q=5.8 size= 784kB
> time=00:00:04.85 bitrate=1323.7kbits/[alsa @ 0x1ad1ba0] ALSA buffer
> xrun.
> frame= 158 fps= 30 q=10.1 size= 808kB time=00:00:05.27
> bitrate=1255.5kbitsframe= 183 fps= 32 q=8.2 size= 888kB
> time=00:00:06.14 bitrate=1183.3kbits/[alsa @ 0x1ad1ba0] ALSA buffer
> xrun.
> frame= 198 fps= 32 q=7.2 size= 924kB time=00:00:07.12
> bitrate=1061.7kbits/frame= 203 fps= 30 q=8.6 size= 988kB
> time=00:00:07.20 bitrate=1122.9kbits/[alsa @ 0x1ad1ba0] ALSA buffer
> xrun.
> frame= 224 fps= 30 q=18.1 size= 1080kB time=00:00:07.47
> bitrate=1183.7kbitsframe= 246 fps= 31 q=5.9 size= 1152kB
> time=00:00:08.71
> ...
> snipped ~150 lines
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