#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> FFmpeg issue tracker _______________________________________________ FFmpeg-trac mailing list FFmpeg-trac@avcodec.org http://ffmpeg.org/mailman/listinfo/ffmpeg-trac