158 lines
4.2 KiB
Java
158 lines
4.2 KiB
Java
package com.ddf.vodsystem.services;
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import lombok.Data;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.regex.Pattern;
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import lombok.Getter;
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import lombok.Setter;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import static java.lang.Long.parseLong;
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public class CompressionService {
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private static final Logger logger = LoggerFactory.getLogger(CompressionService.class);
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private List<String> command;
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@Getter @Setter
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private File inputFile;
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@Getter @Setter
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private File outputFile;
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@Getter @Setter
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private Float startPoint;
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@Getter @Setter
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private Float endPoint;
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@Getter @Setter
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private Integer width;
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@Getter @Setter
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private Integer height;
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@Getter @Setter
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private Float fps;
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@Getter @Setter
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private Float fileSize;
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private static final float AUDIO_RATIO = 0.15f;
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private static final float MAX_AUDIO_BITRATE = 128f;
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private static final float BITRATE_MULTIPLIER = 0.9f;
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private Pattern timePattern = Pattern.compile("time=([\\d:.]+)");
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private long out_time_ms;
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public CompressionService(File file, File output) {
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command = new ArrayList<>();
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command.add("ffmpeg");
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command.add("-progress");
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command.add("pipe:1");
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command.add("-y");
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this.inputFile = file;
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this.outputFile = output;
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}
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public void setResolution(Integer width, Integer height) {
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this.width = width;
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this.height = height;
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}
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private void buildFilters() {
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List<String> filters = new ArrayList<>();
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if (fps != null) {
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filters.add("fps=" + fps);
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}
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if ((width != null && height == null) || (height != null && width == null)) {
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String w = (width != null) ? width.toString() : "-1";
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String h = (height != null) ? height.toString() : "-1";
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filters.add("scale=" + w + ":" + h);
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}
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if (!filters.isEmpty()) {
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command.add("-vf");
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command.add(String.join(",", filters));
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}
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}
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private void buildBitrate() {
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float length = endPoint - startPoint;
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float bitrate = ((fileSize * 8) / length) * BITRATE_MULTIPLIER;
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float audio_bitrate = bitrate * AUDIO_RATIO;
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float video_bitrate;
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if (audio_bitrate > MAX_AUDIO_BITRATE) {
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audio_bitrate = MAX_AUDIO_BITRATE;
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video_bitrate = bitrate - MAX_AUDIO_BITRATE;
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} else {
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video_bitrate = bitrate * (1 - AUDIO_RATIO);
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}
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command.add("-b:v");
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command.add(video_bitrate + "k");
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command.add("-b:a");
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command.add(audio_bitrate + "k");
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}
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private void buildInputs(){
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if (startPoint != null) {
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command.add("-ss");
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command.add(startPoint.toString());
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}
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command.add("-i");
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command.add(inputFile.getAbsolutePath());
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if (endPoint != null) {
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command.add("-t");
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Float duration = endPoint - startPoint;
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command.add(duration.toString());
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}
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}
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private ProcessBuilder buildCommand() {
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buildInputs();
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buildFilters();
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if (fileSize != null) {
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buildBitrate();
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}
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// Output file
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command.add(outputFile.getAbsolutePath());
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logger.info("Running command: {}", String.join(" ", command));
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return new ProcessBuilder(command);
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}
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public void run() throws IOException, InterruptedException {
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logger.info("FFMPEG starting...");
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ProcessBuilder pb = buildCommand();
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pb.redirectErrorStream(true);
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Process process = pb.start();
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BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
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String line;
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while ((line = reader.readLine()) != null) {
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logger.debug(line);
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// if (line.startsWith("out_time_ms=")) {
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// out_time_ms = parseLong(line.substring("out_time_ms=".length()));
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// }
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}
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logger.info("FFMPEG finished");
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}
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}
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