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FFmbc 0.7 @Dec 7, 2012 5:57:48 PM
FFmbc
Some of the patches below require the ff_fill_rgba_map() call, so I've added it to libavfilter/drawutils (like it is in FFmpeg)
ff_fill_rgba_map() in drawutils: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_drawutils_add_ff_fill_rgba_map_2012112501.patch
Based on a process described by BBC R&D and implemented based on a de-interlacing algorithm written by BBC R&D, the Weston 3 field de-interlacing filter uses carefully calculated filter coefficients provided by BBC R&D to accurately deinterlace an interlaced video.
The US patent is available for Martin Weston's three field deinterlacer: http://neuron2.net/misc/USP4789893.pdf
The EU patent record can be viewed here: https://register.epo.org/espacenet/application?number=EP87308892
The output of the w3fdif filter is similar to the output of the yadif filter, but:
w3fdif filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_w3fdif_2012112501.patch
Based on an algorithm written by BBC R&D and using the carefully calculated filter coefficients provided by BBC R&D, these filters are designed to stretch or squeeze video while preserving the quality.
The filters are designed for converting to or from anamorphic video, for instance converting 1440x1080 HD video to 1920x1080 HD video, converting 1920x1080 HD video to 1440x1080 HD video, or pillar-boxing 4:3 video into a 16:9 frame.
stretch4to3 and squeeze4to3 filters are in one patch: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_stretch4to3_2012112501.patch
Note: this code requires a clean-up, as I've left lots of av_log() statements, use while debugging the code, commented out.
Early access to a work in progress.
This filter turns your video into a waveform monitor view. Using the split filter and the overlay filter you can superimpose the waveform monitor on top of your video.
waveformmonitor filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_waveformmonitor_2012112501.patch
Note: this code is very early in its life.
As an example, using this command I can output a waveform representation of a file:
Very early access to a work-in-progress, this code was mostly written on the morning of Saturday 24th Nov 2012.
This filter is designed to create a continuous stream of frames, at a required FPS, from a single frame input.
Without this filter it appears to be impossible to use the fade filter on a PNG or TIF file's output, which means without this filter I could not fade a DOG on and off of a video stream.
repeat frame filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_repeatframe_2012112501.patch
It was during the writing of this filter for FFmbc 0.7 rc7 that I realised that I needed to port and upgrade the fade and overlay filters...
Port my patch for fading alpha from FFmpeg.
Note: requires the ff_fill_rgba_map() in drawutils patch from above
fade filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_fade_2012112501.patch
Port Stefano Sabatini's version of my additions to overlay filter, for unpremultiplied RGBA, and add my additions for unpremultiplied yuva420p - a version of which was posted to the email group ffmpeg-devel on 25th November 2012.
Note: requires the ff_fill_rgba_map() in drawutils patch from above
overlay filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_overlay_2012112501.patch
This patch puts DNxHD into MXF. It is scraped from the recent FFmpeg updates.
Limited testing has been done, but EVS systems have accepted the media, which is all that we needed.
DNxHD in MXF: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_DNxHD-in-MXF.patch
FFmbc 0.7 TODO
Patches for FFmbc 0.7 rc7
ff_fill_rgba_map() in drawutils
Some of the patches below require the ff_fill_rgba_map() call, so I've added it to libavfilter/drawutils (like it is in FFmpeg)
ff_fill_rgba_map() in drawutils: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_drawutils_add_ff_fill_rgba_map_2012112501.patch
Martin Weston three field deinterlace filter
Based on a process described by BBC R&D and implemented based on a de-interlacing algorithm written by BBC R&D, the Weston 3 field de-interlacing filter uses carefully calculated filter coefficients provided by BBC R&D to accurately deinterlace an interlaced video.
The US patent is available for Martin Weston's three field deinterlacer: http://neuron2.net/misc/USP4789893.pdf
The EU patent record can be viewed here: https://register.epo.org/espacenet/application?number=EP87308892
The output of the w3fdif filter is similar to the output of the yadif filter, but:
- the w3fdif filter output is sharper than yadif
- the w3fdif filter handles diagonals better than yadif
w3fdif filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_w3fdif_2012112501.patch
Stretch4to3 and Squeeze4to3
Based on an algorithm written by BBC R&D and using the carefully calculated filter coefficients provided by BBC R&D, these filters are designed to stretch or squeeze video while preserving the quality.
The filters are designed for converting to or from anamorphic video, for instance converting 1440x1080 HD video to 1920x1080 HD video, converting 1920x1080 HD video to 1440x1080 HD video, or pillar-boxing 4:3 video into a 16:9 frame.
stretch4to3 and squeeze4to3 filters are in one patch: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_stretch4to3_2012112501.patch
Note: this code requires a clean-up, as I've left lots of av_log() statements, use while debugging the code, commented out.
Waveform monitor
Early access to a work in progress.
This filter turns your video into a waveform monitor view. Using the split filter and the overlay filter you can superimpose the waveform monitor on top of your video.
waveformmonitor filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_waveformmonitor_2012112501.patch
Note: this code is very early in its life.
As an example, using this command I can output a waveform representation of a file:
| ffmbc -i INPUT.AVI -vf wfm_luma,scale=256:256 -aspect 1:1 -f yuv4mpegpipe - | ffplay - |  |
Repeat Frame
Very early access to a work-in-progress, this code was mostly written on the morning of Saturday 24th Nov 2012.
This filter is designed to create a continuous stream of frames, at a required FPS, from a single frame input.
Without this filter it appears to be impossible to use the fade filter on a PNG or TIF file's output, which means without this filter I could not fade a DOG on and off of a video stream.
repeat frame filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_repeatframe_2012112501.patch
It was during the writing of this filter for FFmbc 0.7 rc7 that I realised that I needed to port and upgrade the fade and overlay filters...
Fade
Port my patch for fading alpha from FFmpeg.
Note: requires the ff_fill_rgba_map() in drawutils patch from above
fade filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_fade_2012112501.patch
Overlay
Port Stefano Sabatini's version of my additions to overlay filter, for unpremultiplied RGBA, and add my additions for unpremultiplied yuva420p - a version of which was posted to the email group ffmpeg-devel on 25th November 2012.
Note: requires the ff_fill_rgba_map() in drawutils patch from above
overlay filter: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_overlay_2012112501.patch
DNxHD in MXF
This patch puts DNxHD into MXF. It is scraped from the recent FFmpeg updates.
Limited testing has been done, but EVS systems have accepted the media, which is all that we needed.
DNxHD in MXF: http://mdsh.com/patches/ffmbc_0.7rc7/FFmbc-0.7-rc7_DNxHD-in-MXF.patch
FFmbc 0.7 TODO