ffxvid for Linux/BSD

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I've received a number of requests from people who asked for a script that helps to encode to Xvid, so here it is. It's a modified script of ffx264 for Xvid encoding with FFmpeg

https://sourceforge.net/projects/ffxvid/

Enjoy

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ChangeLog for ffxvid 1.0.2

* Switch to using libxvid instead of mpeg4 encoder
* Set appropriate threads amount for encoding
* Update default encoding options

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ChangeLog for ffxvid 1.0.3

* Enable Variance AQ by default
* Correct a few things in man page
* Update the preset.txt file

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ChangeLog for ffxvid 1.0.4

* Support high FPS -> low FPS conversions
* Bugfix: missing options in FPS conversion menu

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ChangeLog for ffxvid 1.0.5

* Update audio compression level values
* Update colorspace entry for NTSC video
* Fixed bug in the video_colorspace_func() values

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ChangeLog for ffxvid 1.0.7

* Support accurate rounding for the software scalers
* Support full chroma interpolation for the software scalers
* Use the flags option of the scale option instead of -sws_flags to set scaler and its options
* Bugfix: software scaler code missing

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ChangeLog for ffxvid 1.0.8

* Bugfix in the software scale code. Use an if conditional to check for an y/n answer

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ChangeLog for ffxvid 1.0.9

* Added support for FFmpeg's internal Opus audio encoder

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ChangeLog for ffxvid 1.1.0

* Simplify the scale variable a bit
* Support SMPTE170M colorspace conversion

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ChangeLog for ffxvid 1.1.1

* Match software scaler options in config file with the ones inside the script. $SCALER in config file now takes a value between 0 and 9
* Do some basic checking of scaler option when it's set in the config file

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ChangeLog for ffxvid 1.1.2

* Remove redundant software scaler warning and exit in the sws_func() function for the config file
* Added support for the experimental software scaler
* Added support for software scaler tuning where applicable
* Removed additional encoder info on max audio channels support

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ChangeLog for ffxvid 1.1.3

* Report software scaler set in the config file
* Merge the bicubic and spline scaler tuning code
* Mention for the Lanczos scaler that the scaler tuning value is the filter length and not sharpness

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ChangeLog for ffxvid 1.1.4

* New function, video_chars_func(), to detect and display video characteristics like color range/space/transfer/primaries
* Detect and display video resolution if video scaling is enabled
* Detect and display pixel format

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ChangeLog for ffxvid 1.1.5

* Replace numbers in array variable char of the video_chars_func() function with the ones from the for loop
* Pipe the ffprobe string to tail -1 to work around issues with some problematic files
* Some small improvements to the video_colorspace_func() function

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ChangeLog for ffxvid 1.1.6

* Bugfix in the video_colorspace_func() function. Wrong value used for the ispace option of the filter. Must be bt2020ncl instead of just bt2020

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ChangeLog for ffxvid 1.1.7

* Make software scaler tweaking optional
* Added support for the unsharp filter for sharpen/blur
* Use a colon symbol as separation for input/output color range in the video_colorspace_func() function as to be consistent with the other options. Also set the default to tv:tv

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ChangeLog for ffxvid 1.1.8

* Bugfix: use realpath instead of readlink for the OUTPUT var when running in batch mode. Fixes the issue where readlink will follow the full path in case the input is a symlink which may result of encoding files we were not asked to
* Don't print cropped resolution during runtime if batch mode is selected
* Remove check for realpath. It is now required and not optional

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ChangeLog for ffxvid 1.1.9

* Support full chroma input for the software scaler

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ChangeLog for ffxvid 1.2.0

* Support setting the output video aspect ratio

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ChangeLog for ffxvid 1.2.1

* Support dialog level normalization for AC3/EAC3 audio