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• swscale/aarch64/output : Implement neon assembly for yuv2planeX_10_c_template()

  2 juillet, par Logaprakash Ramajayam

  swscale/aarch64/output : Implement neon assembly for yuv2planeX_10_c_template()
  yuv2yuvX_8_2_0_512_accurate_c :                        2213.4 ( 1.00x)
  
  yuv2yuvX_8_2_0_512_accurate_neon :                      147.5 (15.01x)
  
  yuv2yuvX_8_2_0_512_approximate_c :                     2203.9 ( 1.00x)
  
  yuv2yuvX_8_2_0_512_approximate_neon :                   154.1 (14.30x)
  
  yuv2yuvX_8_2_16_512_accurate_c :                       2147.2 ( 1.00x)
  
  yuv2yuvX_8_2_16_512_accurate_neon :                     150.8 (14.24x)
  
  yuv2yuvX_8_2_16_512_approximate_c :                    2149.7 ( 1.00x)
  
  yuv2yuvX_8_2_16_512_approximate_neon :                  146.8 (14.64x)
  
  yuv2yuvX_8_2_32_512_accurate_c :                       2078.9 ( 1.00x)
  
  yuv2yuvX_8_2_32_512_accurate_neon :                     139.0 (14.95x)
  
  yuv2yuvX_8_2_32_512_approximate_c :                    2083.7 ( 1.00x)
  
  yuv2yuvX_8_2_32_512_approximate_neon :                  140.5 (14.84x)
  
  yuv2yuvX_8_2_48_512_accurate_c :                       2010.7 ( 1.00x)
  
  yuv2yuvX_8_2_48_512_accurate_neon :                     138.2 (14.55x)
  
  yuv2yuvX_8_2_48_512_approximate_c :                    2012.6 ( 1.00x)
  
  yuv2yuvX_8_2_48_512_approximate_neon :                  141.2 (14.26x)
  
  yuv2yuvX_10LE_16_0_512_accurate_c :                    7874.1 ( 1.00x)
  
  yuv2yuvX_10LE_16_0_512_accurate_neon :                  831.6 ( 9.47x)
  
  yuv2yuvX_10LE_16_0_512_approximate_c :                 7918.1 ( 1.00x)
  
  yuv2yuvX_10LE_16_0_512_approximate_neon :               836.1 ( 9.47x)
  
  yuv2yuvX_10LE_16_16_512_accurate_c :                   7630.9 ( 1.00x)
  
  yuv2yuvX_10LE_16_16_512_accurate_neon :                 804.5 ( 9.49x)
  
  yuv2yuvX_10LE_16_16_512_approximate_c :                7724.7 ( 1.00x)
  
  yuv2yuvX_10LE_16_16_512_approximate_neon :              808.6 ( 9.55x)
  
  yuv2yuvX_10LE_16_32_512_accurate_c :                   7436.4 ( 1.00x)
  
  yuv2yuvX_10LE_16_32_512_accurate_neon :                 780.4 ( 9.53x)
  
  yuv2yuvX_10LE_16_32_512_approximate_c :                7366.7 ( 1.00x)
  
  yuv2yuvX_10LE_16_32_512_approximate_neon :              780.5 ( 9.44x)
  
  yuv2yuvX_10LE_16_48_512_accurate_c :                   7099.9 ( 1.00x)
  
  yuv2yuvX_10LE_16_48_512_accurate_neon :                 761.0 ( 9.33x)
  
  yuv2yuvX_10LE_16_48_512_approximate_c :                7097.6 ( 1.00x)
  
  yuv2yuvX_10LE_16_48_512_approximate_neon :              754.6 ( 9.41x)
  Benchmarked on :
  
  Snapdragon(R) X Elite - X1E80100 - Qualcomm(R) Oryon(TM) CPU
  
  3417 Mhz, 12 Core(s), 12 Logical Processor(s)
  

  • [DH] libswscale/aarch64/output.S
  • [DH] libswscale/aarch64/swscale.c
  • [DH] tests/checkasm/sw_scale.c

• Unrecognized option 'txt_format' in ffmpeg latest version

  26 novembre 2020, par RecklessSergio

  I am trying to convert subtitles from scenarist closed captions(scc) to webvtt(vtt)

  



  But I am getting some special characters, so going through ffmpeg documentation https://trac.ffmpeg.org/wiki/ExtractSubtitles
I got to know about the option -txt_format. But when I am using it, ffmpeg is throwing an error saying

  



  "Unrecognized option 'txt_format'.
Error splitting the argument list : Option not found"

  



  FFMPEG VERSION : 
ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
 built with gcc 9.1.1 (GCC) 20190716

  



  Below is the trace level log :

  



  


  


  ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.1.1 (GCC) 20190716
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'trace'.
Reading option '-i' ... matched as input url with argument '223163.scc'.
Reading option 'test.vtt' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument trace.
Successfully parsed a group of options.
Parsing a group of options: input url 223163.scc.
Successfully parsed a group of options.
Opening an input file: 223163.scc.
[NULL @ 0000025d22799500] Opening '223163.scc' for reading
[file @ 0000025d2279a600] Setting default whitelist 'file,crypto'
Probing scc score:100 size:2048
[scc @ 0000025d22799500] Format scc probed with size=2048 and score=100
[scc @ 0000025d22799500] Before avformat_find_stream_info() pos: 38022 bytes read:38022 seeks:0 nb_streams:1
[scc @ 0000025d22799500] All info found
[scc @ 0000025d22799500] stream 0: start_time: -9223372036854776.000 duration: -9223372036854776.000
[scc @ 0000025d22799500] format: start_time: -9223372036854.775 duration: -9223372036854.775 bitrate=0 kb/s
[scc @ 0000025d22799500] After avformat_find_stream_info() pos: 38022 bytes read:38022 seeks:0 frames:0
Input #0, scc, from '223163.scc':
  Duration: N/A, bitrate: N/A
    Stream #0:0, 0, 1/1000: Subtitle: eia_608
Successfully opened the file.
Parsing a group of options: output url test.vtt.
Successfully parsed a group of options.
Opening an output file: test.vtt.
File 'test.vtt' already exists. Overwrite ? [y/N] y
[file @ 0000025d227d1c40] Setting default whitelist 'file,crypto'
Successfully opened the file.
Output #0, webvtt, to 'test.vtt':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0, 0, 1/1000: Subtitle: webvtt
    Metadata:
      encoder         : Lavc58.35.100 webvtt
Stream mapping:
  Stream #0:0 -> #0:0 (eia_608 (cc_dec) -> webvtt (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
    Last message repeated 1 times
No more output streams to write to, finishing.
size=      19kB time=00:18:28.36 bitrate=   0.1kbits/s speed=2.26e+04x
video:0kB audio:0kB subtitle:10kB other streams:0kB global headers:0kB muxing overhead: 88.647011%
Input file #0 (223163.scc):
  Input stream #0:0 (subtitle): 411 packets read (19101 bytes); 349 frames decoded;
  Total: 411 packets (19101 bytes) demuxed
Output file #0 (test.vtt):
  Output stream #0:0 (subtitle): 349 frames encoded; 349 packets muxed (10244 bytes);
  Total: 349 packets (10244 bytes) muxed
349 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000025d22799c80] Statistics: 0 seeks, 2 writeouts
[AVIOContext @ 0000025d227a2880] Statistics: 38022 bytes read, 0 seeks

  


  


  



• How to solve issue with ffmpeg being stuck at 'Opening an input file'

  20 mai 2021, par zv989

  I am using a capture card to capture HDMI audio from another machine.

  



  On my host, output of arecord -l is as follow :

  



  **** List of CAPTURE Hardware Devices ****
Home directory not accessible: Permission denied
card 0: PCH [HDA Intel PCH], device 0: ALC283 Analog [ALC283 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: capture [ezcap U3 capture], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0


  



  The command that I use is :

  



  sudo ffmpeg -f alsa -i hw:CARD=capture,DEV=0 -t 30 test.wav -loglevel debug


  



  When I ran the command, the log seems to freeze at 'Opening an input file' as below :

  



  ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Splitting the commandline.

Reading option '-f' ... matched as option 'f' (force format) with argument 'alsa'.

Reading option '-i' ... matched as input url with argument 'hw:CARD=capture,DEV=0'.

Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '30'.

Reading option 'test.wav' ... matched as output url.

Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.

Finished splitting the commandline.

Parsing a group of options: global .

Applying option loglevel (set logging level) with argument debug.

Successfully parsed a group of options.

Parsing a group of options: input url hw:CARD=capture,DEV=0.

Applying option f (force format) with argument alsa.

Successfully parsed a group of options.

Opening an input file: hw:CARD=capture,DEV=0.


  



  It will just stuck there forever, until I press Ctrl+C, then the log continues as follow :

  



  [alsa @ 0x55c9f0eee8c0] interrupted
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, alsa, from 'hw:CARD=capture,DEV=0':
  Duration: N/A, bitrate: 1536 kb/s
    Stream #0:0, 0, 1/1000000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Successfully opened the file.
Parsing a group of options: output url test.wav.
Applying option t (record or transcode "duration" seconds of audio/video) with argument 30.
Successfully parsed a group of options.
Opening an output file: test.wav.
File 'test.wav' already exists. Overwrite ? [y/N] y
[file @ 0x55c9f0f03280] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Finishing stream 0:0 without any data written to it.
detected 4 logical cores
[graph_0_in_0_0 @ 0x55c9f0f05dc0] Setting 'time_base' to value '1/48000'
[graph_0_in_0_0 @ 0x55c9f0f05dc0] Setting 'sample_rate' to value '48000'
[graph_0_in_0_0 @ 0x55c9f0f05dc0] Setting 'sample_fmt' to value 's16'
[graph_0_in_0_0 @ 0x55c9f0f05dc0] Setting 'channel_layout' to value '0x3'
[graph_0_in_0_0 @ 0x55c9f0f05dc0] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
[format_out_0_0 @ 0x55c9f0f060c0] Setting 'sample_fmts' to value 's16'
[AVFilterGraph @ 0x55c9f0f04be0] query_formats: 5 queried, 12 merged, 0 already done, 0 delayed
Output #0, wav, to 'test.wav':
  Metadata:
    ISFT            : Lavf57.83.100
    Stream #0:0, 0, 1/48000: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
    Metadata:
      encoder         : Lavc57.107.100 pcm_s16le
size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (hw:CARD=capture,DEV=0):
  Input stream #0:0 (audio): 0 packets read (0 bytes); 0 frames decoded (0 samples);
  Total: 0 packets (0 bytes) demuxed
Output file #0 (test.wav):
  Output stream #0:0 (audio): 0 frames encoded (0 samples); 0 packets muxed (0 bytes);
  Total: 0 packets (0 bytes) muxed
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x55c9f0f033e0] Statistics: 3 seeks, 3 writeouts
Exiting normally, received signal 2.


  



  What is wrong with the command ?