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In this article, the editor introduces in detail "how to use FFmpeg to watermark video in Android". The content is detailed, the steps are clear, and the details are handled properly. I hope this article "how to use FFmpeg to watermark video in Android" can help you solve your doubts.

FFmpeg is a tool often used to deal with videos. In general, you can compile it yourself with FFmpeg source code, or you can use packages compiled by others on the Internet. Here I use the latter scheme.

I found it in GitHub. Of course, other packages compiled by FFmpeg are OK.

The idea of using FFmepg to process video or audio is as follows:

Load the FFmpeg environment

Write processing commands for FFmpeg

Run the processing command

Waiting for the result to return

First, introduce the dependency compile 'com.writingminds:FFmpegAndroid:0.3.2'

Second, you need to load before using FFmpeg

FFmpeg ffmpeg = FFmpeg.getInstance (context); try {ffmpeg.loadBinary (new LoadBinaryResponseHandler () {@ Override public void onStart () {} @ Override public void onFailure () {} @ Override public void onSuccess () {} @ Override public void onFinish () {}});} catch (FFmpegNotSupportedException e) {/ / Handle if FFmpeg is not supported by device}

Then you can execute the command, such as the following cmd

FFmpeg ffmpeg = FFmpeg.getInstance (context); try {/ / to execute "ffmpeg-version" command you just need to pass "- version" ffmpeg.execute (cmd, new ExecuteBinaryResponseHandler () {@ Override public void onStart () {} @ Override public void onProgress (String message) {} @ Override public void onFailure (String message) {} @ Override public void onSuccess (String message) {} @ Override public void onFinish () {}) } catch (FFmpegCommandAlreadyRunningException e) {/ / Handle if FFmpeg is already running}

Here is an example of watermarking a video:

Val convertedFile = getConvertedFile (inFilefiles!) / / output file path val cmd = arrayOf ("- y", "- I", inFilefiles room.path, "- I", watermarkFileroom.origintePath, "- filter_complex", "[0val cmd v] [1RV] overlay=main_w-overlay_w-10:10", "- vcodec", "libx264", "- codec:a", "copy") ConvertedFile.path) try {FFmpeg.getInstance (context) .execute (cmd, object: FFmpegExecuteResponseHandler {override fun onStart () {} override fun onProgress (message: String) {Log.e ("TAg", "watermark: $message")} override fun onSuccess (message: String) {Log.e ("TAg", "success: $message") inFile?.delete () WatermarkFile?.delete (); callback?.onSuccess (convertedFile)} override fun onFailure (message: String) {callback?.onFailure (IOException (message))} override fun onFinish () {Log.e ("TAg", "end")})} catch (e: Exception) {callback?.onFailure (e)}

Here is a simple explanation of the commands used:

-y overwrite the output file

-I filename input file, Note: two input files are used here, one is the video file and the other is the watermark image file

-filter_complex "filter graph" multiple input filters, the filter image contains multiple filter chains separated by semicolons; the filter chain contains multiple filters, in which overlay=X:Y overlay video is separated by commas, which requires two inputs, and the second one covers the position above the first one (Xpeny), Y can be omitted, [0VV] [1RV] is a reference to the first and second inputs as input instructions.

Upper left corner: overlay=10:10

Upper right corner: overlay=main_w-overlay_w-10:10

Lower left corner: overlay=10:main_h-overlay_h-10

Lower right corner: overlay=main_w-overlay_w-10:main_h-overlay_h-10

-vcodec specifies the video decoder. Note: the video encoding entered here is H264, so it needs to be decoded with 264.

-codec:a specifies that the audio decoder copy means the same as the input source

Note: the input and output files here are all local paths

The onSuccess will be called back when the FFmpeg is finished, and we can return the output file here.

Such as video merging, audio extraction, video compression and other functions are roughly the same. The difference is that there is a difference in the use of cmd commands, and you can learn more about the specific commands when you achieve specific functions.

After reading this, the article "how to watermark videos with FFmpeg in Android" has been introduced. If you want to master the knowledge of this article, you still need to practice and use it. If you want to know more about related articles, you are welcome to follow the industry information channel.

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