Recherche avancée

Sur d’autres sites (11510)

• gst-inspect-1.0 do not see avdec_h264

  16 octobre 2020, par Marat Zakirov

  Previously I installed gstreamer via conda and its (good) plugins
next I installed gst-libav via sudo apt-get install gstreamer1.0-libav next I used apt-file list gstreamer1.0-libav to see installation path and found it to be /usr/lib/x86_64-linux-gnu/gstreamer-1.0/ next I read running gstream manual and then

  


  GST_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/gstreamer-1.0/ gst-inspect-1.0 avdec_h264

(base) marat@user-System-Product-Name:~$ ls -lh /usr/lib/x86_64-linux-gnu/gstreamer-1.0/ | grep av
-rw-r--r-- 1 root root 181K мар 21  2020 libgstavi.so
-rw-r--r-- 1 root root  56K мар 21  2020 libgstinterleave.so
-rw-r--r-- 1 root root 251K дек  9  2019 libgstlibav.so
-rw-r--r-- 1 root root  15K мар 21  2020 libgstnavigationtest.so
-rw-r--r-- 1 root root  40K мар 21  2020 libgstwavenc.so
-rw-r--r-- 1 root root  48K мар 21  2020 libgstwavpack.so
-rw-r--r-- 1 root root  72K мар 21  2020 libgstwavparse.so


  


  It found many new modules but didn't found avdec_h264. What I am missing ?

  


  UPDATE :

  


  I just want way to use gstreamer via conda virtenv python appliation. If you know valid way to do so I will consider your reply as answer.

  


• arm : vp9 : Add NEON optimizations of VP9 MC functions

  14 novembre 2016, par Martin Storsjö

  arm : vp9 : Add NEON optimizations of VP9 MC functions
  This work is sponsored by, and copyright, Google.
  The filter coefficients are signed values, where the product of the
  
  multiplication with one individual filter coefficient doesn’t
  
  overflow a 16 bit signed value (the largest filter coefficient is
  
  127). But when the products are accumulated, the resulting sum can
  
  overflow the 16 bit signed range. Instead of accumulating in 32 bit,
  
  we accumulate the largest product (either index 3 or 4) last with a
  
  saturated addition.
  (The VP8 MC asm does something similar, but slightly simpler, by
  
  accumulating each half of the filter separately. In the VP9 MC
  
  filters, each half of the filter can also overflow though, so the
  
  largest component has to be handled individually.)
  Examples of relative speedup compared to the C version, from checkasm :
  
                         Cortex      A7     A8     A9    A53
  
  vp9_avg4_neon :                   1.71   1.15   1.42   1.49
  
  vp9_avg8_neon :                   2.51   3.63   3.14   2.58
  
  vp9_avg16_neon :                  2.95   6.76   3.01   2.84
  
  vp9_avg32_neon :                  3.29   6.64   2.85   3.00
  
  vp9_avg64_neon :                  3.47   6.67   3.14   2.80
  
  vp9_avg_8tap_smooth_4h_neon :     3.22   4.73   2.76   4.67
  
  vp9_avg_8tap_smooth_4hv_neon :    3.67   4.76   3.28   4.71
  
  vp9_avg_8tap_smooth_4v_neon :     5.52   7.60   4.60   6.31
  
  vp9_avg_8tap_smooth_8h_neon :     6.22   9.04   5.12   9.32
  
  vp9_avg_8tap_smooth_8hv_neon :    6.38   8.21   5.72   8.17
  
  vp9_avg_8tap_smooth_8v_neon :     9.22  12.66   8.15  11.10
  
  vp9_avg_8tap_smooth_64h_neon :    7.02  10.23   5.54  11.58
  
  vp9_avg_8tap_smooth_64hv_neon :   6.76   9.46   5.93   9.40
  
  vp9_avg_8tap_smooth_64v_neon :   10.76  14.13   9.46  13.37
  
  vp9_put4_neon :                   1.11   1.47   1.00   1.21
  
  vp9_put8_neon :                   1.23   2.17   1.94   1.48
  
  vp9_put16_neon :                  1.63   4.02   1.73   1.97
  
  vp9_put32_neon :                  1.56   4.92   2.00   1.96
  
  vp9_put64_neon :                  2.10   5.28   2.03   2.35
  
  vp9_put_8tap_smooth_4h_neon :     3.11   4.35   2.63   4.35
  
  vp9_put_8tap_smooth_4hv_neon :    3.67   4.69   3.25   4.71
  
  vp9_put_8tap_smooth_4v_neon :     5.45   7.27   4.49   6.52
  
  vp9_put_8tap_smooth_8h_neon :     5.97   8.18   4.81   8.56
  
  vp9_put_8tap_smooth_8hv_neon :    6.39   7.90   5.64   8.15
  
  vp9_put_8tap_smooth_8v_neon :     9.03  11.84   8.07  11.51
  
  vp9_put_8tap_smooth_64h_neon :    6.78   9.48   4.88  10.89
  
  vp9_put_8tap_smooth_64hv_neon :   6.99   8.87   5.94   9.56
  
  vp9_put_8tap_smooth_64v_neon :   10.69  13.30   9.43  14.34
  For the larger 8tap filters, the speedup vs C code is around 5-14x.
  This is significantly faster than libvpx’s implementation of the same
  
  functions, at least when comparing the put_8tap_smooth_64 functions
  
  (compared to vpx_convolve8_horiz_neon and vpx_convolve8_vert_neon from
  
  libvpx).
  Absolute runtimes from checkasm :
  
                            Cortex      A7        A8        A9       A53
  
  vp9_put_8tap_smooth_64h_neon :    20150.3   14489.4   19733.6   10863.7
  
  libvpx vpx_convolve8_horiz_neon : 52623.3   19736.4   21907.7   25027.7
  vp9_put_8tap_smooth_64v_neon :    14455.0   12303.9   13746.4    9628.9
  
  libvpx vpx_convolve8_vert_neon :  42090.0   17706.2   17659.9   16941.2
  Thus, on the A9, the horizontal filter is only marginally faster than
  
  libvpx, while our version is significantly faster on the other cores,
  
  and the vertical filter is significantly faster on all cores. The
  
  difference is especially large on the A7.
  The libvpx implementation does the accumulation in 32 bit, which
  
  probably explains most of the differences.
  This is an adapted cherry-pick from libav commits
  
  ffbd1d2b0002576ef0d976a41ff959c635373fdc,
  
  392caa65df3efa8b2d48a80f08a6af4892c61c08,
  
  557c1675cf0e803b2fee43b4c8b58433842c84d0 and
  
  11623217e3c9b859daee544e31acdd0821b61039.
  Signed-off-by : Ronald S. Bultje <rsbultje@gmail.com>
  

  • [DH] libavcodec/arm/Makefile
  • [DH] libavcodec/arm/vp9dsp_init_arm.c
  • [DH] libavcodec/arm/vp9mc_neon.S
  • [DH] libavcodec/vp9.c
  • [DH] libavcodec/vp9dsp.c
  • [DH] libavcodec/vp9dsp.h

• ffmpeg python error when adding subtitles

  13 mai 2024, par Clara Ogalla

  When I run it I think there is an error with the subtitle path, but I can't solve it.

  


  The error in terminal :

  


  


  [Parsed_subtitles_0 @ 0000019bcc509780] Unable to parse option value
"UsersclaraDocumentsProyectosSubtitulossubtitulosDoctor Who - 1x05 The
Keys Of Marinus - Part 6 The Keys Of Marinus_track4_spa.srt" as image
size Error applying option 'original_size' to filter 'subtitles' :
Invalid argument [vost#0:0/libx264 @ 0000019bce220480] Error
initializing a simple filtergraph Error opening output file
C :\Users\clara\Documents\Proyectos\Subtitulos\videos_con_subtitulos\Doctor
Who - 01x05f - The Keys of Marinus (The Keys of Marinus).mkv. Error
opening output files : Invalid argument

  


  


  My code :

  


  import os
from fuzzywuzzy import fuzz
import ffmpeg

for video_file, (video, subtitle) in video_subtitle_mapping.items():
    print(f"Video: {video_file}, Subtitle: {subtitle}")

    folder_path = r"C:\Users\clara\Documents\Proyectos\Subtitulos\subtitulos"
    subtitulo_file = os.path.join(folder_path, subtitle)

    folder_path = r"C:\Users\clara\Documents\Proyectos\Subtitulos\videos"
    video_path = os.path.join(folder_path, video_file)

    folder_path = r"C:\Users\clara\Documents\Proyectos\Subtitulos\videos_con_subtitulos"
    output_video_file = os.path.join(folder_path, video_file)  # Output video file should have the same name as the input video

    try:
        ffmpeg.input(video_path).output(output_video_file, vf=f"subtitles='{subtitulo_file}'").run()
    except ffmpeg.Error as e:
        print(f"Error processing video {video_file}: {e.stderr}")


  


  Add subtitles to MKVs