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working mp4 with output pipe

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DavidVentura
2024-01-27 23:25:11 +01:00
parent 1401af6e81
commit fc06741192
1 changed files with 19 additions and 19 deletions
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a.js
+16 -16
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@@ -1,9 +1,6 @@
import fs from "node:fs"; import fs from "node:fs";
import beamcoder from "beamcoder"; import beamcoder from "beamcoder";
//let outFile = fs.createWriteStream("a.h264");
let endcode = Buffer.from([0, 0, 1, 0xb7]);
async function imageToVideo(imagePath, duration, frameRate = 30) { async function imageToVideo(imagePath, duration, frameRate = 30) {
// Create a demuxer for the JPEG image // Create a demuxer for the JPEG image
let demuxer = await beamcoder.demuxer(imagePath); let demuxer = await beamcoder.demuxer(imagePath);
@@ -26,7 +23,8 @@ async function imageToVideo(imagePath, duration, frameRate = 30) {
name: "libx264", name: "libx264",
width: frame.width, width: frame.width,
height: frame.height, height: frame.height,
bit_rate: 500000, bit_rate: 400000,
//qmin: 22,
time_base: [1, frameRate], time_base: [1, frameRate],
framerate: [frameRate, 1], framerate: [frameRate, 1],
pix_fmt: "yuv420p", pix_fmt: "yuv420p",
@@ -38,22 +36,25 @@ async function imageToVideo(imagePath, duration, frameRate = 30) {
let stream = beamcoder.muxerStream({}); let stream = beamcoder.muxerStream({});
stream.pipe(fs.createWriteStream("test.mp4")); stream.pipe(fs.createWriteStream("test.mp4"));
// Create a muxer for the output video // Create a muxer for the output video
let muxer = stream.muxer({ format_name: "mpegts" }); //"mp4" }); let muxer = stream.muxer({ format_name: "mp4" });
//console.log(demuxer.streams[0].codecpar.extradata); // null //console.log(demuxer.streams[0].codecpar.extradata); // null
let vstr = muxer.newStream({ let vstr = muxer.newStream({
name: "ts", //"h264", name: "h264",
time_base: [1, 90000], //frameRate], time_base: [1, 90000], //frameRate],
interleaved: true, interleaved: true,
codecpar: { });
// the Object.assign is structural (!!)
Object.assign(vstr.codecpar, {
width: encoder.width, width: encoder.width,
height: encoder.height, height: encoder.height,
format: encoder.pix_fmt, format: encoder.pix_fmt,
//extradata: demuxer.streams[0].codecpar.extradata,
},
}); });
//await muxer.openIO();
//await muxer.initOutput({ movflags: "frag_keyframe+empty_moov+default_base_moof" }); await muxer.openIO();
// adding "empty_moov" crashes mpv/ffmpeg
await muxer.initOutput({ movflags: "frag_keyframe+default_base_moof+faststart" });
console.log("inited"); console.log("inited");
// Add a video stream to the muxer // Add a video stream to the muxer
await muxer.writeHeader(); await muxer.writeHeader();
@@ -72,8 +73,8 @@ async function imageToVideo(imagePath, duration, frameRate = 30) {
for (let packet of encodedPackets.packets) { for (let packet of encodedPackets.packets) {
packet.duration = 1; packet.duration = 1;
packet.stream_index = vstr.index; packet.stream_index = vstr.index;
packet.pts = (packet.pts * 90000) / frameRate; packet.pts = (packet.pts * 90000) / (frameRate * 1);
packet.dts = (packet.dts * 90000) / frameRate; packet.dts = (packet.dts * 90000) / (frameRate * 1);
//packet.pts = i; //packet.pts = i;
await muxer.writeFrame(packet); await muxer.writeFrame(packet);
// outFile.write(packet.data); // outFile.write(packet.data);
@@ -88,11 +89,10 @@ async function imageToVideo(imagePath, duration, frameRate = 30) {
for (let packet of encodedPackets.packets) { for (let packet of encodedPackets.packets) {
packet.duration = 1; packet.duration = 1;
packet.stream_index = vstr.index; packet.stream_index = vstr.index;
packet.pts = (packet.pts * 90000) / frameRate; packet.pts = (packet.pts * 90000) / (frameRate * 1);
packet.dts = (packet.dts * 90000) / frameRate; packet.dts = (packet.dts * 90000) / (frameRate * 1);
await muxer.writeFrame(packet); await muxer.writeFrame(packet);
} }
//outFile.end(endcode);
await muxer.writeTrailer(); await muxer.writeTrailer();
} }