[FFmpeg-trac] #7543(avfilter:new): showwavespic complex filter with alphamerge never completes
FFmpeg
trac at avcodec.org
Sun Nov 11 03:44:43 EET 2018
#7543: showwavespic complex filter with alphamerge never completes
----------------------------------+--------------------------------------
Reporter: ajbeach2 | Type: defect
Status: new | Priority: normal
Component: avfilter | Version: git-master
Keywords: waveform | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
----------------------------------+--------------------------------------
Summary of the bug:
The following command works on ffmpeg 3.2. I have not tested this on any
other versions except for head. On the snapshot release of ffmpeg, the
following command never completes. What this is doing: is creating a
waveform pic with a black background, and a transparent waveform (alpha 0)
from an mp3. This has failed on all mp3 files i have tired.
{{{
ffmpeg -v verbose -y -vn -i song.mp3 \
-filter_complex \
"[0:a]aformat=channel_layouts=mono,compand=gain=-6, \
showwavespic=s=600x120:colors=white,negate[a]; \
color=black:600x120[c]; \
[c][a]alphamerge" -vframes 1 song.png
}}}
ffmpeg just hangs, with this output:
{{{
Output #0, image2, to 'song.png':
Metadata:
TBPM : 114
encoded_by : LAME in FL Studio 11
date : 2015
encoder : Lavf58.22.100
Stream #0:0: Video: png, 1 reference frame, rgba, 600x120 [SAR 1:1 DAR
5:1], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
Metadata:
encoder : Lavc58.39.100 png
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed=
0x
}}}
Here is the more detailed report:
{{{
ffmpeg -report -v 9 -loglevel 99 -y -vn -i song.mp3 \
-filter_complex \
"[0:a]aformat=channel_layouts=mono,compand=gain=-6, \
showwavespic=s=600x120:colors=white,negate[a]; \
color=black:600x120[c]; \
[c][a]alphamerge" -vframes 1 song.png
ffmpeg started on 2018-11-11 at 01:29:38
Report written to "ffmpeg-20181111-012938.log"
ffmpeg version N-92397-g27e114b Copyright (c) 2000-2018 the FFmpeg
developers
built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
configuration: --prefix=/home/circleci/ffmpeg_build --pkg-config-
flags=--static --extra-cflags=-I/home/circleci/ffmpeg_build/include
--extra-ldflags=-L/home/circleci/ffmpeg_build/lib
--bindir=/home/circleci/bin --enable-gpl --enable-libx264 --enable-
libmp3lame --enable-nonfree --enable-libfdk-aac --enable-pthreads
libavutil 56. 23.101 / 56. 23.101
libavcodec 58. 39.100 / 58. 39.100
libavformat 58. 22.100 / 58. 22.100
libavdevice 58. 6.100 / 58. 6.100
libavfilter 7. 43.100 / 7. 43.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a
report) with argument '1'.
Reading option '-v' ... matched as option 'v' (set logging level) with
argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument '99'.
Reading option '-y' ... matched as option 'y' (overwrite output files)
with argument '1'.
Reading option '-vn' ... matched as option 'vn' (disable video) with
argument '1'.
Reading option '-i' ... matched as input url with argument 'song.mp3'.
Reading option '-filter_complex' ... matched as option 'filter_complex'
(create a complex filtergraph) with argument
'[0:a]aformat=channel_layouts=mono,compand=gain=-6,
showwavespic=s=600x120:colors=white,negate[a];
color=black:600x120[c]; [c][a]alphamerge'.
Reading option '-vframes' ... matched as option 'vframes' (set the number
of video frames to output) with argument '1'.
Reading option 'song.png' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Applying option v (set logging level) with argument 9.
Applying option y (overwrite output files) with argument 1.
Applying option filter_complex (create a complex filtergraph) with
argument [0:a]aformat=channel_layouts=mono,compand=gain=-6,
showwavespic=s=600x120:colors=white,negate[a];
color=black:600x120[c]; [c][a]alphamerge.
Successfully parsed a group of options.
Parsing a group of options: input url song.mp3.
Applying option vn (disable video) with argument 1.
Successfully parsed a group of options.
Opening an input file: song.mp3.
[NULL @ 0x55b45d65d8c0] Opening 'song.mp3' for reading
[file @ 0x55b45d65e340] Setting default whitelist 'file,crypto'
Probing mp3 score:1 size:1978
Probing mp3 score:25 size:4026
Probing mp3 score:51 size:8122
[mp3 @ 0x55b45d65d8c0] Format mp3 probed with size=8192 and score=51
id3v2 ver:3 flags:00 len:60
[mp3 @ 0x55b45d65d8c0] Skipping 0 bytes of junk at 70.
[mp3 @ 0x55b45d65d8c0] Before avformat_find_stream_info() pos: 70 bytes
read:32768 seeks:0 nb_streams:1
[mp3 @ 0x55b45d65d8c0] All info found
[mp3 @ 0x55b45d65d8c0] Estimating duration from bitrate, this may be
inaccurate
[mp3 @ 0x55b45d65d8c0] stream 0: start_time: 0.000 duration: 265.091
[mp3 @ 0x55b45d65d8c0] format: start_time: 0.000 duration: 265.091
bitrate=320 kb/s
[mp3 @ 0x55b45d65d8c0] After avformat_find_stream_info() pos: 53318 bytes
read:65536 seeks:0 frames:50
Input #0, mp3, from 'song.mp3':
Metadata:
TBPM : 114
encoded_by : LAME in FL Studio 11
date : 2015
Duration: 00:04:25.09, start: 0.000000, bitrate: 320 kb/s
Stream #0:0, 50, 1/14112000: Audio: mp3, 44100 Hz, stereo, fltp, 320
kb/s
Successfully opened the file.
[Parsed_aformat_0 @ 0x55b45d685780] Setting 'channel_layouts' to value
'mono'
[Parsed_compand_1 @ 0x55b45d660940] Setting 'gain' to value '-6'
[Parsed_showwavespic_2 @ 0x55b45d662600] Setting 's' to value '600x120'
[Parsed_showwavespic_2 @ 0x55b45d662600] Setting 'colors' to value 'white'
[Parsed_negate_3 @ 0x55b45d663100] negate_alpha:0
[Parsed_color_4 @ 0x55b45d660400] Setting 'color' to value 'black'
[Parsed_color_4 @ 0x55b45d660400] Setting 'size' to value '600x120'
[Parsed_color_4 @ 0x55b45d660400] size:600x120 rate:25/1
duration:-1.000000 sar:1/1
Parsing a group of options: output url song.png.
Applying option vframes (set the number of video frames to output) with
argument 1.
Successfully parsed a group of options.
Opening an output file: song.png.
Successfully opened the file.
Stream mapping:
Stream #0:0 (mp3float) -> aformat
alphamerge -> Stream #0:0 (png)
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
detected 2 logical cores
[Parsed_aformat_0 @ 0x55b45d65d3c0] Setting 'channel_layouts' to value
'mono'
[Parsed_compand_1 @ 0x55b45d675b80] Setting 'gain' to value '-6'
[Parsed_showwavespic_2 @ 0x55b45d68eac0] Setting 's' to value '600x120'
[Parsed_showwavespic_2 @ 0x55b45d68eac0] Setting 'colors' to value 'white'
[Parsed_negate_3 @ 0x55b45d68f500] negate_alpha:0
[Parsed_color_4 @ 0x55b45d676300] Setting 'color' to value 'black'
[Parsed_color_4 @ 0x55b45d676300] Setting 'size' to value '600x120'
[Parsed_color_4 @ 0x55b45d676300] size:600x120 rate:25/1
duration:-1.000000 sar:1/1
[graph_0_in_0_0 @ 0x55b45d676440] Setting 'time_base' to value '1/44100'
[graph_0_in_0_0 @ 0x55b45d676440] Setting 'sample_rate' to value '44100'
[graph_0_in_0_0 @ 0x55b45d676440] Setting 'sample_fmt' to value 'fltp'
[graph_0_in_0_0 @ 0x55b45d676440] Setting 'channel_layout' to value '0x3'
[graph_0_in_0_0 @ 0x55b45d676440] tb:1/44100 samplefmt:fltp
samplerate:44100 chlayout:0x3
[format @ 0x55b45d65f900] Setting 'pix_fmts' to value
'rgb24|rgba|rgb48be|rgba64be|pal8|gray|ya8|gray16be|ya16be|monob'
[Parsed_aformat_0 @ 0x55b45d65d3c0] auto-inserting filter
'auto_resampler_0' between the filter 'graph_0_in_0_0' and the filter
'Parsed_aformat_0'
[Parsed_showwavespic_2 @ 0x55b45d68eac0] auto-inserting filter
'auto_resampler_1' between the filter 'Parsed_compand_1' and the filter
'Parsed_showwavespic_2'
[AVFilterGraph @ 0x55b45d660740] query_formats: 9 queried, 9 merged, 6
already done, 0 delayed
[auto_resampler_0 @ 0x55b45d712240] [SWR @ 0x55b45d712740] Using fltp
internally between filters
[auto_resampler_0 @ 0x55b45d712240] [SWR @ 0x55b45d712740] Matrix
coefficients:
[auto_resampler_0 @ 0x55b45d712240] [SWR @ 0x55b45d712740] FC: FL:0.707107
FR:0.707107
[auto_resampler_0 @ 0x55b45d712240] ch:2 chl:stereo fmt:fltp r:44100Hz ->
ch:1 chl:mono fmt:dblp r:44100Hz
[Parsed_compand_1 @ 0x55b45d675b80] 0: x=-70.000000 y=0.000000
[Parsed_compand_1 @ 0x55b45d675b80] 1: x=-60.000000 y=40.000000
[Parsed_compand_1 @ 0x55b45d675b80] 2: x=1.000000 y=-1.000000
[auto_resampler_1 @ 0x55b45d728480] [SWR @ 0x55b45d728940] Using dblp
internally between filters
[auto_resampler_1 @ 0x55b45d728480] ch:1 chl:mono fmt:dblp r:44100Hz ->
ch:1 chl:mono fmt:s16 r:44100Hz
[Parsed_showwavespic_2 @ 0x55b45d68eac0] s:600x120 r:73.500000 n:1
[Parsed_negate_3 @ 0x55b45d68f500] val[0][0] = 255
[Parsed_negate_3 @ 0x55b45d68f500] val[0][1] = 254
[Parsed_negate_3 @ 0x55b45d68f500] val[0][2] = 253
[Parsed_negate_3 @ 0x55b45d68f500] val[0][3] = 252
[Parsed_negate_3 @ 0x55b45d68f500] val[0][4] = 251
[Parsed_negate_3 @ 0x55b45d68f500] val[0][5] = 250
[Parsed_negate_3 @ 0x55b45d68f500] val[0][6] = 249
[Parsed_negate_3 @ 0x55b45d68f500] val[0][7] = 248
[Parsed_negate_3 @ 0x55b45d68f500] val[0][8] = 247
[Parsed_negate_3 @ 0x55b45d68f500] val[0][9] = 246
[Parsed_negate_3 @ 0x55b45d68f500] val[0][10] = 245
[Parsed_negate_3 @ 0x55b45d68f500] val[0][11] = 244
[Parsed_negate_3 @ 0x55b45d68f500] val[0][12] = 243
[Parsed_negate_3 @ 0x55b45d68f500] val[0][13] = 242
[Parsed_negate_3 @ 0x55b45d68f500] val[0][14] = 241
[Parsed_negate_3 @ 0x55b45d68f500] val[0][15] = 240
....
eventually this is parsed
}}}
After that: the report gets stuck:
{{{
Output #0, image2, to 'song.png':
Metadata:
TBPM : 114
encoded_by : LAME in FL Studio 11
date : 2015
encoder : Lavf58.22.100
Stream #0:0, 0, 1/25: Video: png, 1 reference frame, rgba, 600x120
[SAR 1:1 DAR 5:1], 0/1, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
Metadata:
encoder : Lavc58.39.100 png
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
[Parsed_alphamerge_5 @ 0x55b45d70f780] Copying data in avfilter.
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 420 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 392 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 421 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 380 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 391 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 314 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 390 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 384 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 408 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 421 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 394 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 490 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 428 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 406 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 359 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 196 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 164 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 178 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 208 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 338 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 493 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 448 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 468 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 426 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 280 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 259 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 298 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 256 times
cur_dts is invalid (this is harmless if it occurs once at the start per
stream)
Last message repeated 108 times
[Parsed_showwavespic_2 @ 0x55b45d68eac0] Create frame averaging 19484
samples per column
}}}
I have created a github repo with more details, and files to test against.
Included in the github repo is the report file, and the output of the
command. I have also provided a docker image that demonstrates the issue.
There is a compile-ffmpeg.sh script in the repo that was used to compile
ffmpeg. This is using the http://ffmpeg.org/releases/ffmpeg-
snapshot.tar.bz2 release of ffmpeg
https://github.com/ajbeach2/go-pyhton-ci
This is the mp3 I tested against:
https://github.com/ajbeach2/go-pyhton-ci/raw/master/song.mp3
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7543>
FFmpeg <https://ffmpeg.org>
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