batch-transcode-video
v2.0.0
Published
Batch transcode videos using the video_transcoding gem.
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batch-transcode-video
A command-line utility for recursively running batch cropping and transcoding operations on a directory of videos. This utility is a wrapper for a a utility called transcode_video which itself is a wrapper for trancoding utilities such as HandbrakeCLI, MKVToolNix, and ffmpeg.
Prerequisites
Important: You must have all of the dependencies listed in this section of the transcode_video README.
Before installing batch-transcode-video
, install the video_transcoding
gem using the following command.
gem install video_transcoding
Installation
This utility can be installed so that it is globally accessible from the terminal as batch-transcode-video
using the following command.
npm i batch-transcode-video -g
Usage
For all the videos found in the input
directory, this utility will determine if the source should be cropped (e.g.: it has black bars on the top and bottom of the source video) using detect-crop
and then it will be transcoded using transcode-video
. When in CLI mode, the progress and remaining time for the current file and the entire batch are displayed.
This utility can recover from most errors, and as such, it will continue to sequentially process source files even if a previous transcoding operation has failed.
A summary is displayed when the entire batch transcoding operation is finished. The summary includes the overall number of errors encountered and files successfully created.
Before You Begin
WARNING: If the program cannot successfully transcode an input file, and then verify the output video file, it will be marked as errored and the transcoded file (if one exists) will be deleted from the output directory. This is done to prevent partially-transcoded files from remaining in the output directory that then need to be manually deleted before retrying the transcoding operation.
If you run the program using an output directory containing previously-transcoded video, especially for source files that still exist in your input directory, you must use the --diff
option to ensure sucessful transcodes from previous batches are not deleted from the output directory. In --diff
mode, input files are skipped when their corresponding output files already exist in the output directory.
Alternatively, you can use the --keep
option to ensure files are never deleted from the output directory, even if they have errors or failed to finish transcoding. However, subsequent runs, with or without using the --diff
option, will not reprocess failed input files, unless the corresponding output files are manually deleted.
Instructions
Recursively search for videos to transcode using video_transcoding. If an input
directory is not specified then the current directory will be used as the input directory. If an output
directory is not specified, the input
directory will be used for the transcoded videos. By default, if an output file already exists then it will be treated as an error. Use the --diff
option to skip input
files that already exist in the output
folder.
batch-transcode-video --input video/ --output transcoded/ --diff
Transcoded files will be placed in the same directory as the source unless you specify an output
directory. The relative folder structure will be maintained in the output directory unless you use the flatten
flag.
If you want to modify the search pattern that will be used to locate video in the input
directory, you can specify a glob pattern using the mask
option.
Non-binary Usage
You can also directly require()
the underlying BatchTranscodeVideo
video class. By default, the ES5-compatible files will be loaded when requiring this module.
// ES5 (default)
var BatchTranscodeVideo = require('batch-transcode-video');
var batch = new BatchTranscodeVideo({
input: './my/rawVideos/',
output: './my/transcodedVideos/'
}, ['--dry-run']);
batch
.transcodeAll()
.then(function (res) {
console.log(res);
})
.catch(function (err) {
console.log(err);
});
But, you can also require the raw ES2015 source files if you are running in an ES2015 capable environment.
Note: The un-transpiled source files are not including when you install the library using npm install
. To get the ES2015 source, you need to clone this repository from GitHub using git clone
.
// ES2015
import BatchTranscodeVideo from './batch-transcode-video/index.js';
let batch = new BatchTranscodeVideo(options, transcodeOptions);
Note: If you import
the non-CLI files, you will not see any formatted progress bars and summary output in the console. To require the CLI version of the library from your application, then simply import
the index-cli.js
file instead of index.js
.
import CliBatchTranscodeVideo from './batch-transcode-video/index-cli.js';
import minimist from 'minimist';
let options = minimist(process.argv.slice(2), {'--': true});
let batch = new CliBatchTranscodeVideo(options, options['--']);
// Start CLI mode
batch.cli();
Options
--help
Flag: does not accept a value (Alias:-h
)- You can view the manual for this tool by using this flag in the terminal.
--input [path]
(Default:process.cwd()
) (Alias:-i
)- The input directory containing the source videos to transcode.
--output [path]
(Default: same directory as source files) (Alias:-o
)- The output directory to hold the transcoded videos. If you do not specify an output directory then each transcoded file will be placed in the same directory as its source file. Note: if a source file is already in the same file format as the transcoded video (e.g.: both source and output are both
.mkv
) then you must specify an output directory, as the program will not overwrite existing files.
- The output directory to hold the transcoded videos. If you do not specify an output directory then each transcoded file will be placed in the same directory as its source file. Note: if a source file is already in the same file format as the transcoded video (e.g.: both source and output are both
--mask [pattern]
(Default:**/*.{mp4,avi,mkv,m4v,ts,mov}
) (Alias:-m
)- Search pattern to use for input directory. Note that the default pattern will search in nested directories. For more information about what values can be used, see the glob documentation.
--crop
Mixed values (Alias:-c
)- If you provide an actual crop value (e.g.:
"0:0:0:0"
) as the argument for this option, then that crop value will be used for all videos. - If you provide anything other than an actual crop value (e.g.
1
) as the argument for this option, then when crop detection returns conflicting crop values it will just use the least extreme crop value and continue transcoding.
- If you provide an actual crop value (e.g.:
--diff
Flag: does not accept a value (Default:false
)- Enable this option if you only want to transcode source files that do not exist already in the
output
folder. - If a destination file already exists in the
output
directory:- And
diff
is enabled, a notice will be generated letting you know that the file was skipped (unlessquiet
is enabled). - And
diff
is not enabled, an error will be generated letting you know that the file already exists.
- And
- If you want to transcode a batch of videos in-place (i.e.: without specifying an
output
directory) then you should enabled this option to prevent errors from being generated when the source and destination file names have the same extension.- For example: trying to transcode a
.mkv
video into a.mkv
video without supplying an externaloutput
directory will generate an error unless you specify thediff
flag.
- For example: trying to transcode a
- Enable this option if you only want to transcode source files that do not exist already in the
--debug
Flag: does not accept a value (Default:false
) Enable verbose logging mode. Disables progress indicator and then streams child process to masterstdout
fordetect-crop
andtranscode-video
.--flatten
Flag: does not accept a value (Default:false
)- Do not preserve relative directory structure in output directory. If this is enabled, the base output folder will contain all transcoded videos. Note: this option has no effect unless you specify an
output
directory.
- Do not preserve relative directory structure in output directory. If this is enabled, the base output folder will contain all transcoded videos. Note: this option has no effect unless you specify an
--quiet
Flag: does not accept a value (Default:false
)- Prevents any logging to stdout and will only exit
0
on success or1
on error
- Prevents any logging to stdout and will only exit
--keep
Flag: does not accept a value (Default:false
) (Alias:-k
)- Never delete any output files, no matter what happens, even if the encoding task fails for the corresponding input file. If you use this option, input files that fail to encode correctly, or finish encoding, will not be deleted from the output folder. Subsequent runs, with or without using the
--diff
option, will not reprocess the failed input files, unless the corresponding output files are manually deleted.
- Never delete any output files, no matter what happens, even if the encoding task fails for the corresponding input file. If you use this option, input files that fail to encode correctly, or finish encoding, will not be deleted from the output folder. Subsequent runs, with or without using the
--nocrop
Flag: does not accept a value (Default:false
)- Skip crop detection entirely (i.e., do not run
detect-crop
) and do not pass a--crop
value totranscode-video
.
- Skip crop detection entirely (i.e., do not run
Providing options to transcode-video
If you want to provide custom options to trancode-video
then you can place them at the end of your normal options following a --
and they will be passed directly to the transcode-video
program. Find more information about the allowed options at the transcode_video README.
batch-transcode-video --input video/ --output transcoded/ --diff -- --dry-run