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• swresample/resample : speed up build_filter by 50%

  4 novembre 2015, par Ganesh Ajjanagadde

  swresample/resample : speed up build_filter by 50%
  This speeds up build_filter by 50%. This gain should be pretty
  
  consistent across all architectures and platforms.
  Essentially, this relies on a observation that the filters have some
  
  even/odd symmetry that may be exploited during the construction of the
  
  polyphase filter bank. In particular, phases (scaled to [0, 1]) in [0.5, 1] are
  
  easily derived from [0, 0.5] and expensive reevaluation of function
  
  points are unnecessary. This requires some rather annoying even/odd
  
  bookkeeping as can be seen from the patch.
  I vaguely recall from signal processing theory more general symmetries allowing even greater
  
  optimization of the construction. At a high level, "even functions"
  
  correspond to 2, and one can imagine variations. Nevertheless, for the sake
  
  of some generality and because of existing filters, this is all that is
  
  being exploited.
  Currently, this patch relies on phase_count being even or (trivially) 1,
  
  though this is not an inherent limitation to the approach. This
  
  assumption is safe as phase_count is 1 << phase_bits, and is hence a
  
  power of two. There is no way for user API to set it to a nontrivial odd
  
  number. This assumption has been placed as an assert in the code.
  To repeat, this assumes even symmetry of the filters, which is the most common
  
  way to get generalized linear phase anyway and is true of all currently
  
  supported filters.
  As a side note, accuracy should be identical or perhaps slightly better
  
  due to this "forcing" filter symmetries leading to a better phase
  
  characteristic. As before, I can’t test this claim easily, though it may
  
  be of interest.
  Patch tested with FATE.
  Sample benchmark (x86-64, Haswell, GNU/Linux) :
  test : swr-resample-dblp-44100-2626
  new :
  
  527376779 decicycles in build_filter(loop 1000),     256 runs,      0 skips
  
  524361765 decicycles in build_filter(loop 1000),     512 runs,      0 skips
  
  516552574 decicycles in build_filter(loop 1000),    1024 runs,      0 skips
  old :
  
  974178658 decicycles in build_filter(loop 1000),     256 runs,      0 skips
  
  972794408 decicycles in build_filter(loop 1000),     512 runs,      0 skips
  
  954350046 decicycles in build_filter(loop 1000),    1024 runs,      0 skips
  Note that lower level optimizations are entirely possible, I focussed on
  
  getting the high level semantics correct. In any case, this should
  
  provide a good foundation.
  Reviewed-by : Michael Niedermayer <michael@niedermayer.cc>
  
  Signed-off-by : Ganesh Ajjanagadde <gajjanagadde@gmail.com>
  

  • [DH] libswresample/resample.c

• Use ffmpeg Windows batch script on OS X

  3 novembre 2015, par andisk

  I got an ffmpeg batch script written by someone. The script takes all video clips of a specific folder, cuts off first and last frame, converts the clips to ProRes and saves them in a new folder. I got it running under Windows (just have to double-click the *.bat file and it does what it’s supposed to do).
  But now I need that same script running on a mac. I’ve installed ffmpeg over homebrew. Then I tried to make a Automator-Service, but with no success. Best thing would be if I could just right click on the folder with the videos, go to services and click on convert. I’m not really into coding and scripting, but the people who should use the script are happy when they find the power switch of the computer..
  Can anyone help me with this ?
  Cheers andisk

  Edit : Here’s the code

      `@echo off
  
  
  
  
  
      mkdir tmp
  
      mkdir converted
  
  
  
  
  
      set pathtofind=%~dp0
  
      echo Searching for files in %pathtofind%%1\
  
  
  
  
  
      setlocal enableextensions
  
      setlocal ENABLEDELAYEDEXPANSION
  
  
  
  
  
  
  
      for %%f in (%pathtofind%%1\*) do (
  
              echo Handling file %%f
  
              ffmpeg -y -loglevel quiet -i %%f tmp\%%d.png
  
              set count=0
  
              for %%x in (tmp\*) do set /a count +=1
  
              echo Deleting frames 1 and !count!
  
              del tmp\1.png
  
              del tmp\!count!.png
  
              echo Saving %%~nf.mov
  
              ffmpeg -y -loglevel verbose -f image2 -r 24 -i tmp\%%d.png -vcodec prores -profile:v 1 -r 24 converted\%%~nf.mov
  
              del /q tmp\*.*
  
  
  
              echo ---------------------------
  
      )
  
  
  
  
  
      rd tmp`

• RTSP stream to HLS Stream using FFMPEG, Getting Error with newer FFMPEG

  8 novembre 2017, par shaun

  I am trying to take an RTSP stream and convert it to an HLS sTream.

  If I use ffmpeg version N-76684-g1fe82ab
  This command Works just fine.

  c:\temp\ffmpeg.exe -i "rtsp://192.168.249.233:8554/Stream" -c:v copy -hls_time 3 -hls_wrap 10 "c:\inetpub\wwwroot\hls\streaming.m3u8"

  However, if I use a newer compiled version of FFMPEG ffmpeg version N-83779-gfe57bf7cd6
  using the same exact command as above I get the error :

  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument.

  What am I doing wrong ? I would like to use the newer FFMPEG, but it appears that something broke between them.....

  ---

  complete console output of N-83779

  C:\inetpub\wwwroot\hls>ffmpeg.exe -i "rtsp://192.168.249.233:8554/Stream" -c:v copy -hls_time 3 -hls_wrap 10 "c:\inetpub\wwwroot\hls\streaming.m3u8"
  
  ffmpeg version N-83779-gfe57bf7cd6 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.9.3 (GCC)
  
    configuration: --prefix=/usr/local/x86_64-w64-mingw32 --enable-gpl --enable-nonfree --enable-libx264 --enable-libfdk_aac --enable-static --enable-runtime-cpudetect --enable-w32th
  
  reads --disable-shared --disable-ffplay --disable-ffserver --arch=x86_64 --extra-cflags=-I/local/x86_64-w64-mingw32/include --extra-ldflags='-L/local/x86_64-w64-mingw32/lib -static
  
  '
  
    libavutil      55. 48.100 / 55. 48.100
  
    libavcodec     57. 82.102 / 57. 82.102
  
    libavformat    57. 66.103 / 57. 66.103
  
    libavdevice    57.  3.100 / 57.  3.100
  
    libavfilter     6. 74.100 /  6. 74.100
  
    libswscale      4.  3.101 /  4.  3.101
  
    libswresample   2.  4.100 /  2.  4.100
  
    libpostproc    54.  2.100 / 54.  2.100
  
  [udp @ 023e9d40] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 039af180] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  Invalid UE golomb code
  
  [h264 @ 023eaca0] log2_max_frame_num_minus4 out of range (0-12): -1094995529
  
  [rtsp @ 023e7220] Failed to open codec in avformat_find_stream_info
  
  Invalid UE golomb code
  
  [NULL @ 023eaca0] log2_max_frame_num_minus4 out of range (0-12): -1094995529
  
  [NULL @ 023eaca0] non-existing PPS 0 referenced
  
  Invalid UE golomb code
  
  [h264 @ 023eaca0] log2_max_frame_num_minus4 out of range (0-12): -1094995529
  
  [NULL @ 023eaca0] non-existing PPS 0 referenced
  
      Last message repeated 20 times
  
  [rtsp @ 023e7220] Stream #0: not enough frames to estimate rate; consider increasing probesize
  
  [rtsp @ 023e7220] Could not find codec parameters for stream 0 (Video: h264 (High), none(progressive)): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, rtsp, from 'rtsp://192.168.249.233:8554/Stream':
  
    Metadata:
  
      title           : Session streamed by Stream
  
      comment         : Stream
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), none(progressive), 90k tbr, 90k tbn, 180k tbc
  
  [hls @ 039d5140] dimensions not set
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
      Last message repeated 1 times

  ---

  Tried -analyzeduration 10M -probesize 10M did not help.

  ffmpeg -analyzeduration 10M -probesize 10M -i "rtsp://192.168.249.233:8554/Stream" -c:v copy -hls_time 3 -hls_wrap 10 "c:\inetpub\wwwroot\hls\streaming.m3u8"
  
  ffmpeg version N-83779-gfe57bf7cd6 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.9.3 (GCC)
  
    configuration: --prefix=/usr/local/x86_64-w64-mingw32 --enable-gpl --enable-nonfree --enable-libx264 --enable-libfdk_aac --enable-static --enable-runtime-cpudetect --enable-w32threads --disable-shared --disable-ffplay --disable-ffserver --arch=x86_64 --extra-cflags=-I/local/x86_64-w64-mingw32/include --extra-ldflags='-L/local/x86_64-w64-mingw32/lib -static'
  
    libavutil      55. 48.100 / 55. 48.100
  
    libavcodec     57. 82.102 / 57. 82.102
  
    libavformat    57. 66.103 / 57. 66.103
  
    libavdevice    57.  3.100 / 57.  3.100
  
    libavfilter     6. 74.100 /  6. 74.100
  
    libswscale      4.  3.101 /  4.  3.101
  
    libswresample   2.  4.100 /  2.  4.100
  
    libpostproc    54.  2.100 / 54.  2.100
  
  [udp @ 0238a140] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 0421f1a0] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  Invalid UE golomb code
  
  [h264 @ 0238af20] log2_max_frame_num_minus4 out of range (0-12): -1094995529
  
  [rtsp @ 02387960] Failed to open codec in avformat_find_stream_info
  
  Invalid UE golomb code
  
  [NULL @ 0238af20] log2_max_frame_num_minus4 out of range (0-12): -1094995529
  
  [NULL @ 0238af20] non-existing PPS 0 referenced
  
  Invalid UE golomb code
  
  [h264 @ 0238af20] log2_max_frame_num_minus4 out of range (0-12): -1094995529
  
  [NULL @ 0238af20] non-existing PPS 0 referenced
  
      Last message repeated 24 times
  
  [rtsp @ 02387960] Stream #0: not enough frames to estimate rate; consider increasing probesize
  
  [rtsp @ 02387960] Could not find codec parameters for stream 0 (Video: h264 (High), none(progressive)): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, rtsp, from 'rtsp://192.168.249.233:8554/FirstVuHD':
  
    Metadata:
  
      title           : Session streamed by Stream
  
      comment         : Stream
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), none(progressive), 90k tbr, 90k tbn, 180k tbc
  
  [hls @ 04edf8a0] dimensions not set
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
      Last message repeated 1 times

  ---

  Working older version of FFMPEG output

  c:/temp/ffmpeg -i "rtsp://192.168.249.233:8554/Stream" -c:v copy -hls_time 3 -hls_wrap 10 "c:\inetpub\wwwroot\hls\streaming.m3u8"
  
  ffmpeg version N-76684-g1fe82ab Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 5.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55.  6.100 / 55.  6.100
  
    libavcodec     57. 15.100 / 57. 15.100
  
    libavformat    57. 14.100 / 57. 14.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 15.100 /  6. 15.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [h264 @ 0000000000506d20] log2_max_frame_num_minus4 out of range (0-12): -1
  
      Last message repeated 5 times
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [h264 @ 0000000000506d20] RTP: missed 75 packets
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [h264 @ 0000000000506d20] RTP: missed 86 packets
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [h264 @ 0000000000506d20] RTP: missed 57 packets
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [h264 @ 0000000000506d20] RTP: missed 6 packets
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [h264 @ 0000000000506d20] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0000000000506d20] decode_slice_header error
  
  [h264 @ 0000000000506d20] no frame!
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [h264 @ 0000000000506d20] RTP: missed 1093 packets
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [h264 @ 0000000000506d20] RTP: missed 10 packets
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [h264 @ 0000000000506d20] RTP: missed 2 packets
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [h264 @ 0000000000506d20] RTP: missed 20 packets
  
  Input #0, rtsp, from 'rtsp://192.168.249.233:8554/Stream':
  
    Metadata:
  
      title           : Session streamed by Stream
  
      comment         : Stream
  
    Duration: N/A, start: 0.033367, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), yuv420p, 1920x1080, 29.97 tbr, 90k tbn, 180k tbc
  
  Output #0, hls, to 'c:\inetpub\wwwroot\hls\streaming.m3u8':
  
    Metadata:
  
      title           : Session streamed by Stream
  
      comment         : Stream
  
      encoder         : Lavf57.14.100
  
      Stream #0:0: Video: h264, yuv420p, 1920x1080, q=2-31, 29.97 tbr, 90k tbn, 90k tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [rtsp @ 0000000000503e60] max delay reached. need to consume packet
  
  [NULL @ 0000000000506d20] RTP: missed 211 packets
  
  frame=  398 fps= 71 q=-1.0 size=N/A time=00:00:16.68 bitrate=N/A