使用 stream 作為輸入在 node.js 中使用 ffmpeg 將 mp4 視頻轉換為 HLS 時出錯

Question

我正在嘗試使用 ffmpeg 將 MP4 文件轉換為 HLS。代碼：

var stream = createReadStream(filePath);
ffmpeg(stream)
    .on('stderr', function(stderrLine) {
        console.log('Stderr output: ' + stderrLine);
    })
    .on('end', function() {
        console.log('done processing input stream');
    })
    .on('error', function(err) {
        console.log('an error happened: ' + err.message);
    })
    .save(join(__basedir, "public", `file.m3u8`));

OutPut：

Stderr output: ffmpeg version git-2020-05-22-38490cb Copyright (c) 2000-2020 the FFmpeg developers
Stderr output:   built with gcc 9.3.1 (GCC) 20200513
Stderr output:   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
Stderr output:   libavutil      56. 46.100 / 56. 46.100
Stderr output:   libavcodec     58. 86.101 / 58. 86.101
Stderr output:   libavformat    58. 43.100 / 58. 43.100
Stderr output:   libavdevice    58.  9.103 / 58.  9.103
Stderr output:   libavfilter     7. 82.100 /  7. 82.100
Stderr output:   libswscale      5.  6.101 /  5.  6.101
Stderr output:   libswresample   3.  6.100 /  3.  6.100
Stderr output:   libpostproc    55.  6.100 / 55.  6.100
Stderr output: [mov,mp4,m4a,3gp,3g2,mj2 @ 000001b68c53cb00] overread end of atom 'stsd' by 34 bytes
Stderr output: [mov,mp4,m4a,3gp,3g2,mj2 @ 000001b68c53cb00] stream 0, offset 0x30: partial file
Stderr output: [mov,mp4,m4a,3gp,3g2,mj2 @ 000001b68c53cb00] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1920x1080, 2528 kb/s): unspecified pixel format
Stderr output: Consider increasing the value for the 'analyzeduration' and 'probesize' options
Stderr output: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pipe:0':
Stderr output:   Metadata:
Stderr output:     major_brand     : isom
Stderr output:     minor_version   : 512
Stderr output:     compatible_brands: isomiso2avc1mp41
Stderr output:     encoder         : Lavf56.25.101
Stderr output:   Duration: 00:03:00.97, start: 0.000000, bitrate: N/A
Stderr output:     Stream #0:0(und): Video: h264 (avc1 / 0x31637661), none, 1920x1080, 2528 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 48k tbc (default)
Stderr output:     Metadata:
Stderr output:       handler_name    : VideoHandler
Stderr output:     Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Stderr output:     Metadata:
Stderr output:       handler_name    : SoundHandler
Stderr output: Stream mapping:
Stderr output:   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stderr output:   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Stderr output: [mov,mp4,m4a,3gp,3g2,mj2 @ 000001b68c53cb00] stream 0, offset 0x30: partial file
Stderr output: pipe:0: Invalid data found when processing input
Stderr output: Cannot determine format of input stream 0:0 after EOF
Stderr output: Error marking filters as finished
Stderr output: Conversion failed!
Stderr output:
an error happened: ffmpeg exited with code 1: pipe:0: Invalid data found when processing input
Cannot determine format of input stream 0:0 after EOF
Error marking filters as finished
Conversion failed!

我也嘗試過使用 moveflag 選項.outputOptions("-movflags isml+frag_keyframe")以及-movflags faststart

我讀過你如何使用 Node.js 到 stream 一個帶有 ffmpeg 的 MP4 文件？

但是我不太明白該怎么做以及如何做。

Answer 1

要從 mp4 視頻實現 HLS，我們可以使用以下代碼。

• 我們將使用 ffmpeg 標簽選項將視頻作為輸入傳遞。 在這個例子中，我正在轉換一個 480p 分辨率相關的播放列表。 我們可以使用相同的代碼，只需更新 720p 和 360p 的分辨率
• 創建所有三個分辨率后，我們將添加 MASTER PLAYLIST，其中包含具有不同 BANDWIDTH 選項的所有三個版本。 此帶寬將根據您的互聯網速度自動切換視頻版本。

MASTER_PLAYLIST_SAMPLE

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=800000,RESOLUTION=640x360
https://PROJECT_PATH/hls/5001/101/hlsThumbs/360/sample_video_360.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1400000,RESOLUTION=842x480
https://PROJECT_PATH/hls/5001/101/hlsThumbs/480/sample_video_480.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=2800000,RESOLUTION=1280x720
https://PROJECT_PATH/hls/5001/101/hlsThumbs/720/sample_video_720.m3u8
#EXT-X-ENDLIST

VERSIONING_FILE_SAMPLE

let ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
let ffmpeg = require('fluent-ffmpeg');
ffmpeg.setFfmpegPath(ffmpegPath);

const creatorId = 5001;
const videoId = 101;
const videoFileName = "sample_video.mp4";
const version480Name = "sample_video_480.m3u8"

ffmpeg('public/assets/hls/'+creatorId+'/'+videoId+'/original/'+videoFileName, { timeout: 432000 }).addOptions([
  '-strict -2',
  '-preset:v veryfast', 
  '-profile:v baseline', // baseline profile (level 3.0) for H264 video codec
  '-level 3.0', 
  '-s 842x480',          // 842px width, 480px height output video dimensions
  '-start_number 0',     // start the first .ts segment at index 0
  '-hls_time 10',        // 10 second segment duration
  '-hls_list_size 0',    // Maxmimum number of playlist entries (0 means all entries/infinite)
  '-f hls'               // HLS format
]).output('public/assets/hls/'+creatorId+'/'+videoId+'/hlsThumbs/480/'+version480Name)
.on('error', function(err, stdout, stderr) {
console.log('An error occurred: ' + err);
console.log("ffmpeg stdout:\n" + stdout);
console.log("ffmpeg stderr:\n" + stderr);
console.log("Hls Cannot be converted for this video");
callback(err);
})
.on('progress', function(progress) { 
  console.log('HLS Processing : 480p ----'+ JSON.stringify(progress) + ' done'); })
.on('end', callback1).run();   

您可以從此鏈接調試 your.m3u8 HLS URL - HLS URL TESTER