mirror of https://github.com/FFmpeg/FFmpeg.git synced 2026-05-04 21:08:03 +02:00

T

Andreas Rheinhardt 9beecb2670 avcodec/x86/qpeldsp: Add SSE2 vertical lowpass functions

Benchmarks ([4], [8] and [12] are pure vertical functions
and therefore show the biggest improvements):

avg_qpel_pixels_tab[0][4]_c:                           844.5 ( 1.00x)
avg_qpel_pixels_tab[0][4]_mmxext:                      225.5 ( 3.74x)
avg_qpel_pixels_tab[0][4]_sse2:                        146.6 ( 5.76x)
avg_qpel_pixels_tab[0][5]_c:                          1915.9 ( 1.00x)
avg_qpel_pixels_tab[0][5]_mmxext:                      499.6 ( 3.83x)
avg_qpel_pixels_tab[0][5]_sse2:                        405.5 ( 4.72x)
avg_qpel_pixels_tab[0][6]_c:                          1775.9 ( 1.00x)
avg_qpel_pixels_tab[0][6]_mmxext:                      484.9 ( 3.66x)
avg_qpel_pixels_tab[0][6]_sse2:                        385.4 ( 4.61x)
avg_qpel_pixels_tab[0][7]_c:                          1937.0 ( 1.00x)
avg_qpel_pixels_tab[0][7]_mmxext:                      501.3 ( 3.86x)
avg_qpel_pixels_tab[0][7]_sse2:                        403.6 ( 4.80x)
avg_qpel_pixels_tab[0][8]_c:                           976.7 ( 1.00x)
avg_qpel_pixels_tab[0][8]_mmxext:                      216.9 ( 4.50x)
avg_qpel_pixels_tab[0][8]_sse2:                        113.1 ( 8.64x)
avg_qpel_pixels_tab[0][9]_c:                          1971.8 ( 1.00x)
avg_qpel_pixels_tab[0][9]_mmxext:                      494.9 ( 3.98x)
avg_qpel_pixels_tab[0][9]_sse2:                        388.3 ( 5.08x)
avg_qpel_pixels_tab[0][10]_c:                         1900.8 ( 1.00x)
avg_qpel_pixels_tab[0][10]_mmxext:                     476.4 ( 3.99x)
avg_qpel_pixels_tab[0][10]_sse2:                       362.4 ( 5.24x)
avg_qpel_pixels_tab[0][11]_c:                         2003.3 ( 1.00x)
avg_qpel_pixels_tab[0][11]_mmxext:                     496.5 ( 4.04x)
avg_qpel_pixels_tab[0][11]_sse2:                       385.9 ( 5.19x)
avg_qpel_pixels_tab[0][12]_c:                          841.8 ( 1.00x)
avg_qpel_pixels_tab[0][12]_mmxext:                     226.7 ( 3.71x)
avg_qpel_pixels_tab[0][12]_sse2:                       143.3 ( 5.87x)
avg_qpel_pixels_tab[0][13]_c:                         1929.0 ( 1.00x)
avg_qpel_pixels_tab[0][13]_mmxext:                     499.6 ( 3.86x)
avg_qpel_pixels_tab[0][13]_sse2:                       412.1 ( 4.68x)
avg_qpel_pixels_tab[0][14]_c:                         1777.9 ( 1.00x)
avg_qpel_pixels_tab[0][14]_mmxext:                     484.8 ( 3.67x)
avg_qpel_pixels_tab[0][14]_sse2:                       385.9 ( 4.61x)
avg_qpel_pixels_tab[0][15]_c:                         1914.8 ( 1.00x)
avg_qpel_pixels_tab[0][15]_mmxext:                     501.8 ( 3.82x)
avg_qpel_pixels_tab[0][15]_sse2:                       405.0 ( 4.73x)
avg_qpel_pixels_tab[1][4]_c:                           203.4 ( 1.00x)
avg_qpel_pixels_tab[1][4]_mmxext:                       64.7 ( 3.14x)
avg_qpel_pixels_tab[1][4]_sse2:                         40.3 ( 5.05x)
avg_qpel_pixels_tab[1][5]_c:                           488.8 ( 1.00x)
avg_qpel_pixels_tab[1][5]_mmxext:                      134.6 ( 3.63x)
avg_qpel_pixels_tab[1][5]_sse2:                        108.5 ( 4.50x)
avg_qpel_pixels_tab[1][6]_c:                           448.2 ( 1.00x)
avg_qpel_pixels_tab[1][6]_mmxext:                      128.8 ( 3.48x)
avg_qpel_pixels_tab[1][6]_sse2:                        102.5 ( 4.37x)
avg_qpel_pixels_tab[1][7]_c:                           489.6 ( 1.00x)
avg_qpel_pixels_tab[1][7]_mmxext:                      134.5 ( 3.64x)
avg_qpel_pixels_tab[1][7]_sse2:                        108.8 ( 4.50x)
avg_qpel_pixels_tab[1][8]_c:                           223.8 ( 1.00x)
avg_qpel_pixels_tab[1][8]_mmxext:                       57.5 ( 3.89x)
avg_qpel_pixels_tab[1][8]_sse2:                         36.3 ( 6.16x)
avg_qpel_pixels_tab[1][9]_c:                           496.6 ( 1.00x)
avg_qpel_pixels_tab[1][9]_mmxext:                      129.8 ( 3.82x)
avg_qpel_pixels_tab[1][9]_sse2:                        105.1 ( 4.72x)
avg_qpel_pixels_tab[1][10]_c:                          466.1 ( 1.00x)
avg_qpel_pixels_tab[1][10]_mmxext:                     123.2 ( 3.78x)
avg_qpel_pixels_tab[1][10]_sse2:                        99.1 ( 4.70x)
avg_qpel_pixels_tab[1][11]_c:                          497.9 ( 1.00x)
avg_qpel_pixels_tab[1][11]_mmxext:                     129.9 ( 3.83x)
avg_qpel_pixels_tab[1][11]_sse2:                       105.4 ( 4.72x)
avg_qpel_pixels_tab[1][12]_c:                          203.5 ( 1.00x)
avg_qpel_pixels_tab[1][12]_mmxext:                      63.8 ( 3.19x)
avg_qpel_pixels_tab[1][12]_sse2:                        38.8 ( 5.25x)
avg_qpel_pixels_tab[1][13]_c:                          487.9 ( 1.00x)
avg_qpel_pixels_tab[1][13]_mmxext:                     134.7 ( 3.62x)
avg_qpel_pixels_tab[1][13]_sse2:                       108.4 ( 4.50x)
avg_qpel_pixels_tab[1][14]_c:                          447.4 ( 1.00x)
avg_qpel_pixels_tab[1][14]_mmxext:                     128.2 ( 3.49x)
avg_qpel_pixels_tab[1][14]_sse2:                       102.4 ( 4.37x)
avg_qpel_pixels_tab[1][15]_c:                          487.5 ( 1.00x)
avg_qpel_pixels_tab[1][15]_mmxext:                     134.0 ( 3.64x)
avg_qpel_pixels_tab[1][15]_sse2:                       109.9 ( 4.44x)

put_no_rnd_qpel_pixels_tab[0][4]_c:                    825.5 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][4]_mmxext:               242.5 ( 3.40x)
put_no_rnd_qpel_pixels_tab[0][4]_sse2:                 136.0 ( 6.07x)
put_no_rnd_qpel_pixels_tab[0][5]_c:                   1837.4 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][5]_mmxext:               542.5 ( 3.39x)
put_no_rnd_qpel_pixels_tab[0][5]_sse2:                 446.5 ( 4.11x)
put_no_rnd_qpel_pixels_tab[0][6]_c:                   1766.3 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][6]_mmxext:               493.6 ( 3.58x)
put_no_rnd_qpel_pixels_tab[0][6]_sse2:                 394.6 ( 4.48x)
put_no_rnd_qpel_pixels_tab[0][7]_c:                   1877.4 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][7]_mmxext:               541.9 ( 3.46x)
put_no_rnd_qpel_pixels_tab[0][7]_sse2:                 447.6 ( 4.19x)
put_no_rnd_qpel_pixels_tab[0][8]_c:                    785.1 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][8]_mmxext:               206.2 ( 3.81x)
put_no_rnd_qpel_pixels_tab[0][8]_sse2:                 101.6 ( 7.73x)
put_no_rnd_qpel_pixels_tab[0][9]_c:                   1772.2 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][9]_mmxext:               489.5 ( 3.62x)
put_no_rnd_qpel_pixels_tab[0][9]_sse2:                 394.8 ( 4.49x)
put_no_rnd_qpel_pixels_tab[0][10]_c:                  1711.5 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][10]_mmxext:              461.2 ( 3.71x)
put_no_rnd_qpel_pixels_tab[0][10]_sse2:                357.9 ( 4.78x)
put_no_rnd_qpel_pixels_tab[0][11]_c:                  1815.9 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][11]_mmxext:              490.8 ( 3.70x)
put_no_rnd_qpel_pixels_tab[0][11]_sse2:                394.0 ( 4.61x)
put_no_rnd_qpel_pixels_tab[0][12]_c:                   824.8 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][12]_mmxext:              242.9 ( 3.40x)
put_no_rnd_qpel_pixels_tab[0][12]_sse2:                135.3 ( 6.10x)
put_no_rnd_qpel_pixels_tab[0][13]_c:                  1843.5 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][13]_mmxext:              545.4 ( 3.38x)
put_no_rnd_qpel_pixels_tab[0][13]_sse2:                444.9 ( 4.14x)
put_no_rnd_qpel_pixels_tab[0][14]_c:                  1758.1 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][14]_mmxext:              497.7 ( 3.53x)
put_no_rnd_qpel_pixels_tab[0][14]_sse2:                393.5 ( 4.47x)
put_no_rnd_qpel_pixels_tab[0][15]_c:                  1861.3 ( 1.00x)
put_no_rnd_qpel_pixels_tab[0][15]_mmxext:              545.0 ( 3.42x)
put_no_rnd_qpel_pixels_tab[0][15]_sse2:                445.7 ( 4.18x)
put_no_rnd_qpel_pixels_tab[1][4]_c:                    198.3 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][4]_mmxext:                64.3 ( 3.08x)
put_no_rnd_qpel_pixels_tab[1][4]_sse2:                  39.8 ( 4.98x)
put_no_rnd_qpel_pixels_tab[1][5]_c:                    460.7 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][5]_mmxext:               137.2 ( 3.36x)
put_no_rnd_qpel_pixels_tab[1][5]_sse2:                 113.5 ( 4.06x)
put_no_rnd_qpel_pixels_tab[1][6]_c:                    441.4 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][6]_mmxext:               126.7 ( 3.49x)
put_no_rnd_qpel_pixels_tab[1][6]_sse2:                 103.7 ( 4.26x)
put_no_rnd_qpel_pixels_tab[1][7]_c:                    465.9 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][7]_mmxext:               137.7 ( 3.38x)
put_no_rnd_qpel_pixels_tab[1][7]_sse2:                 114.0 ( 4.09x)
put_no_rnd_qpel_pixels_tab[1][8]_c:                    193.8 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][8]_mmxext:                52.1 ( 3.72x)
put_no_rnd_qpel_pixels_tab[1][8]_sse2:                  27.8 ( 6.97x)
put_no_rnd_qpel_pixels_tab[1][9]_c:                    450.9 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][9]_mmxext:               126.2 ( 3.57x)
put_no_rnd_qpel_pixels_tab[1][9]_sse2:                 104.3 ( 4.32x)
put_no_rnd_qpel_pixels_tab[1][10]_c:                   436.5 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][10]_mmxext:              118.1 ( 3.69x)
put_no_rnd_qpel_pixels_tab[1][10]_sse2:                 92.4 ( 4.73x)
put_no_rnd_qpel_pixels_tab[1][11]_c:                   453.6 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][11]_mmxext:              128.7 ( 3.52x)
put_no_rnd_qpel_pixels_tab[1][11]_sse2:                103.6 ( 4.38x)
put_no_rnd_qpel_pixels_tab[1][12]_c:                   201.2 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][12]_mmxext:               64.2 ( 3.13x)
put_no_rnd_qpel_pixels_tab[1][12]_sse2:                 39.6 ( 5.08x)
put_no_rnd_qpel_pixels_tab[1][13]_c:                   461.9 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][13]_mmxext:              137.6 ( 3.36x)
put_no_rnd_qpel_pixels_tab[1][13]_sse2:                113.4 ( 4.07x)
put_no_rnd_qpel_pixels_tab[1][14]_c:                   442.6 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][14]_mmxext:              127.0 ( 3.49x)
put_no_rnd_qpel_pixels_tab[1][14]_sse2:                102.2 ( 4.33x)
put_no_rnd_qpel_pixels_tab[1][15]_c:                   462.9 ( 1.00x)
put_no_rnd_qpel_pixels_tab[1][15]_mmxext:              139.5 ( 3.32x)
put_no_rnd_qpel_pixels_tab[1][15]_sse2:                113.3 ( 4.09x)

put_qpel_pixels_tab[0][4]_c:                           824.6 ( 1.00x)
put_qpel_pixels_tab[0][4]_mmxext:                      220.1 ( 3.75x)
put_qpel_pixels_tab[0][4]_sse2:                        137.8 ( 5.98x)
put_qpel_pixels_tab[0][5]_c:                          1892.0 ( 1.00x)
put_qpel_pixels_tab[0][5]_mmxext:                      508.0 ( 3.72x)
put_qpel_pixels_tab[0][5]_sse2:                        408.6 ( 4.63x)
put_qpel_pixels_tab[0][6]_c:                          1758.0 ( 1.00x)
put_qpel_pixels_tab[0][6]_mmxext:                      476.7 ( 3.69x)
put_qpel_pixels_tab[0][6]_sse2:                        381.4 ( 4.61x)
put_qpel_pixels_tab[0][7]_c:                          1924.3 ( 1.00x)
put_qpel_pixels_tab[0][7]_mmxext:                      495.1 ( 3.89x)
put_qpel_pixels_tab[0][7]_sse2:                        417.2 ( 4.61x)
put_qpel_pixels_tab[0][8]_c:                           772.1 ( 1.00x)
put_qpel_pixels_tab[0][8]_mmxext:                      197.5 ( 3.91x)
put_qpel_pixels_tab[0][8]_sse2:                        118.4 ( 6.52x)
put_qpel_pixels_tab[0][9]_c:                          1778.2 ( 1.00x)
put_qpel_pixels_tab[0][9]_mmxext:                      476.7 ( 3.73x)
put_qpel_pixels_tab[0][9]_sse2:                        379.6 ( 4.68x)
put_qpel_pixels_tab[0][10]_c:                         1714.6 ( 1.00x)
put_qpel_pixels_tab[0][10]_mmxext:                     460.7 ( 3.72x)
put_qpel_pixels_tab[0][10]_sse2:                       386.8 ( 4.43x)
put_qpel_pixels_tab[0][11]_c:                         1819.1 ( 1.00x)
put_qpel_pixels_tab[0][11]_mmxext:                     474.9 ( 3.83x)
put_qpel_pixels_tab[0][11]_sse2:                       404.5 ( 4.50x)
put_qpel_pixels_tab[0][12]_c:                          829.7 ( 1.00x)
put_qpel_pixels_tab[0][12]_mmxext:                     221.5 ( 3.75x)
put_qpel_pixels_tab[0][12]_sse2:                       138.7 ( 5.98x)
put_qpel_pixels_tab[0][13]_c:                         1892.8 ( 1.00x)
put_qpel_pixels_tab[0][13]_mmxext:                     494.4 ( 3.83x)
put_qpel_pixels_tab[0][13]_sse2:                       413.9 ( 4.57x)
put_qpel_pixels_tab[0][14]_c:                         1763.1 ( 1.00x)
put_qpel_pixels_tab[0][14]_mmxext:                     473.4 ( 3.72x)
put_qpel_pixels_tab[0][14]_sse2:                       377.8 ( 4.67x)
put_qpel_pixels_tab[0][15]_c:                         1896.4 ( 1.00x)
put_qpel_pixels_tab[0][15]_mmxext:                     492.5 ( 3.85x)
put_qpel_pixels_tab[0][15]_sse2:                       399.0 ( 4.75x)
put_qpel_pixels_tab[1][4]_c:                           198.6 ( 1.00x)
put_qpel_pixels_tab[1][4]_mmxext:                       60.9 ( 3.26x)
put_qpel_pixels_tab[1][4]_sse2:                         40.1 ( 4.95x)
put_qpel_pixels_tab[1][5]_c:                           471.4 ( 1.00x)
put_qpel_pixels_tab[1][5]_mmxext:                      131.8 ( 3.58x)
put_qpel_pixels_tab[1][5]_sse2:                        107.2 ( 4.40x)
put_qpel_pixels_tab[1][6]_c:                           440.3 ( 1.00x)
put_qpel_pixels_tab[1][6]_mmxext:                      126.3 ( 3.49x)
put_qpel_pixels_tab[1][6]_sse2:                        100.6 ( 4.38x)
put_qpel_pixels_tab[1][7]_c:                           469.2 ( 1.00x)
put_qpel_pixels_tab[1][7]_mmxext:                      131.7 ( 3.56x)
put_qpel_pixels_tab[1][7]_sse2:                        106.9 ( 4.39x)
put_qpel_pixels_tab[1][8]_c:                           194.2 ( 1.00x)
put_qpel_pixels_tab[1][8]_mmxext:                       52.9 ( 3.67x)
put_qpel_pixels_tab[1][8]_sse2:                         28.0 ( 6.95x)
put_qpel_pixels_tab[1][9]_c:                           464.6 ( 1.00x)
put_qpel_pixels_tab[1][9]_mmxext:                      125.1 ( 3.71x)
put_qpel_pixels_tab[1][9]_sse2:                        100.9 ( 4.60x)
put_qpel_pixels_tab[1][10]_c:                          433.8 ( 1.00x)
put_qpel_pixels_tab[1][10]_mmxext:                     118.2 ( 3.67x)
put_qpel_pixels_tab[1][10]_sse2:                        94.5 ( 4.59x)
put_qpel_pixels_tab[1][11]_c:                          463.9 ( 1.00x)
put_qpel_pixels_tab[1][11]_mmxext:                     125.5 ( 3.70x)
put_qpel_pixels_tab[1][11]_sse2:                       102.6 ( 4.52x)
put_qpel_pixels_tab[1][12]_c:                          199.2 ( 1.00x)
put_qpel_pixels_tab[1][12]_mmxext:                      63.7 ( 3.12x)
put_qpel_pixels_tab[1][12]_sse2:                        36.2 ( 5.50x)
put_qpel_pixels_tab[1][13]_c:                          475.6 ( 1.00x)
put_qpel_pixels_tab[1][13]_mmxext:                     139.5 ( 3.41x)
put_qpel_pixels_tab[1][13]_sse2:                       107.3 ( 4.43x)
put_qpel_pixels_tab[1][14]_c:                          441.9 ( 1.00x)
put_qpel_pixels_tab[1][14]_mmxext:                     126.9 ( 3.48x)
put_qpel_pixels_tab[1][14]_sse2:                       101.3 ( 4.36x)
put_qpel_pixels_tab[1][15]_c:                          475.9 ( 1.00x)
put_qpel_pixels_tab[1][15]_mmxext:                     131.9 ( 3.61x)
put_qpel_pixels_tab[1][15]_sse2:                       107.0 ( 4.45x)

The new functions (in qpeldsp.asm) occupy 8244B (the MMXEXT functions
which they will replace occupy only 6720B).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

2026-04-30 10:39:33 +02:00

.forgejo

tools/check_arm_indent: Run formatting on arm, in addition to aarch64

2026-04-29 13:53:07 +03:00

compat

avfilter/scale_cuda: fix color bleeding in lanczos scaling

2026-04-04 11:31:16 +00:00

doc

doc: add narrow variable scope in loops to style examples

2026-04-22 13:29:18 +00:00

ffbuild

ffbuild/common: remove DBG=1 to preprocess external asm

2026-04-03 16:15:33 +02:00

fftools

fftools: replace fall-through comments

2026-04-28 12:29:37 +00:00

libavcodec

avcodec/x86/qpeldsp: Add SSE2 vertical lowpass functions

2026-04-30 10:39:33 +02:00

libavdevice

avdevice/v4l2: fix mmap_free() skipping first buffer

2026-04-28 13:45:20 +00:00

libavfilter

libavfilter/vf_amf_common: free the frame allocated by av_frame_alloc on error

2026-04-28 14:57:34 +00:00

libavformat

avformat/dashdec: fix previous commit where I inadvertently removed the case when calc_next_seg_no_from_timelines returned -1 and move_timelines wasn't called

2026-04-29 23:54:37 +00:00

libavutil

libavutil/arm: Fix indentation in asm.S

2026-04-29 13:49:27 +03:00

libswresample

libswresample/arm: Change to the common indentation size

2026-04-29 13:49:27 +03:00

libswscale

libswscale/arm: Switch consistent indentation to common style

2026-04-29 13:49:27 +03:00

presets

…

tests

fate/filter-video: add frei0r_src test

2026-04-30 03:46:18 +00:00

tools

tools/check_arm_indent: Run formatting on arm, in addition to aarch64

2026-04-29 13:53:07 +03:00

.gitattributes

…

.gitignore

swscale/aarch64: add NEON sws_ops backend

2026-03-30 11:38:35 +00:00

.mailmap

mailmap: add entry for myself

2025-08-08 21:51:15 +00:00

Changelog

avfilter/vf_frc_amf: Add AMF Frame Rate Converter filter

2026-04-21 16:47:05 +00:00

configure

configure: add implicit-fallthrough warning flags

2026-04-28 12:29:37 +00:00

CONTRIBUTING.md

CONTRIBUTING.md: add blank line after top heading

2026-04-20 12:32:50 +00:00

COPYING.GPLv2

…

COPYING.GPLv3

…

COPYING.LGPLv2.1

all: fix whitespace/new-line issues

2025-08-03 13:48:47 +02:00

COPYING.LGPLv3

…

CREDITS

…

FUNDING.json

Add FUNDING.json

2025-06-23 14:48:40 +02:00

INSTALL.md

INSTALL.md: add title heading and normalize section levels

2026-04-20 12:32:50 +00:00

LICENSE.md

Remove libpostproc

2025-05-07 15:35:47 +02:00

MAINTAINERS

MAINTAINERS: add myself for libavfilter

2026-04-25 19:18:28 +02:00

Makefile

configure: add detection of assembler support for SME2

2026-03-04 23:52:36 +02:00

README.md

README.md: use consistent ATX heading style

2026-04-20 12:32:50 +00:00

RELEASE

RELEASE: update to 8.0

2025-08-14 08:42:29 -04:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

libavcodec provides implementation of a wider range of codecs.
libavformat implements streaming protocols, container formats and basic I/O access.
libavutil includes hashers, decompressors and miscellaneous utility functions.
libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.
libavdevice provides an abstraction to access capture and playback devices.
libswresample implements audio mixing and resampling routines.
libswscale implements color conversion and scaling routines.

Tools

ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
ffplay is a minimalistic multimedia player.
ffprobe is a simple analysis tool to inspect multimedia content.
Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.

Languages

C 89.3%

Assembly 8.3%

Makefile 1.3%

C++ 0.3%

GLSL 0.3%

Other 0.3%