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• ffmpeg batch process issue mac

  22 octobre 2023, par e e

  I'm using ffmpeg to batch process all files(with names containing spaces) in a directory. The script is like :

  


  echo my converter
read -p "Enter give folder: " folder
echo '//////////////////////START CONVERTING FROM FOLDER///////////////////////'

find $folder -type f -name "*[[:space:]]*" | while read file; do
    release="${file%%.*}"'_t.mp4';
    echo "$file";
    ffmpeg -i "$file" -c copy "$release" -loglevel error -stats
    echo $release;
done


  


  the script searches all the files in the address and ffmpeg one by one. However the first file will always fail due to some unknown issues :

  


  [mpegts @ 0x7fb8e9904a40] Continuity check failed for pid 17 expected 2 got 3
[mpegts @ 0x7fb8e9904a40] Continuity check failed for pid 0 expected 0 got 2
[mpegts @ 0x7fb8e9904a40] Continuity check failed for pid 4096 expected 0 got 2
[mpegts @ 0x7fb8e9904a40] Continuity check failed for pid 256 expected 2 got 7
[mpegts @ 0x7fb8e9904a40] Packet corrupt (stream = 0, dts = 203523000).
/Users/xy/Downloads/aaa/aa vv.ts: corrupt input packet in stream 0
[NULL @ 0x7fb8e9905a40] Decoding VUI



  


  If there is only one file, the process works fine.
If comment out the ffmpeg command, it echoes as expected :

  


  /Users/xy/Downloads/aaa/aa vv_t.mp4
/Users/xy/Downloads/aaa/aa vv_t_t.mp4
/Users/xy/Downloads/aaa/aa vv.ts
/Users/xy/Downloads/aaa/aa vv_t.mp4
/Users/xy/Downloads/aaa/cc ee.ts
/Users/xy/Downloads/aaa/cc ee_t.mp4


  


  it first find the target files and then converts into another with different file names.
Any suggestions, thank you !!

  


• pthread_frame : allow per-field ThreadFrame owners.

  3 avril 2017, par Ronald S. Bultje

  pthread_frame : allow per-field ThreadFrame owners.
  This tries to handle cases where separate invocations of decode_frame()
  
  (each running in separate threads) write to respective fields in the
  
  same AVFrame->data[]. Having per-field owners makes interaction between
  
  readers (the referencing thread) and writers (the decoding thread)
  
  slightly more optimal if both accesses are field-based, since they will
  
  use the respective producer’s thread objects (mutex/cond) instead of
  
  sharing the thread objects of the first field’s producer.
  In practice, this fixes the following tsan-warning in fate-h264 :
  WARNING : ThreadSanitizer : data race (pid=21615)
  
    Read of size 4 at 0x7d640000d9fc by thread T2 (mutexes : write M1006) :
  
      #0 ff_thread_report_progress pthread_frame.c:569 (ffmpeg:x86_64+0x100f7cf54)
  
  [..]
  
    Previous write of size 4 at 0x7d640000d9fc by main thread (mutexes : write M1004) :
  
      #0 update_context_from_user pthread_frame.c:335 (ffmpeg:x86_64+0x100f81abb)
  

  • [DH] libavcodec/h264_slice.c
  • [DH] libavcodec/pthread_frame.c
  • [DH] libavcodec/thread.h
  • [DH] libavcodec/utils.c

• unable to access a class function from its object instance

  23 mars 2021, par Alp4x

  I'm unable to access a class function from its object instance - the object is being initialized properly and the constructor runs perfectly as well - just not able to explicitly call a function from that class

  


  Code for my FFmpeg class :

  


  module.exports = class FFmpeg {
  constructor(rtpParameters) {
    this._rtpParameters = rtpParameters;
    this._process = undefined;
    this._observer = new EventEmitter();
    this._createProcess();
  }

  _createProcess() {
    const sdpString = createSdpText(this._rtpParameters);
    const sdpStream = convertStringToStream(sdpString);

    console.log("createProcess() [sdpString:%s]", sdpString);

    this._process = child_process.spawn("ffmpeg", this._commandArgs);

    if (this._process.stderr) {
      this._process.stderr.setEncoding("utf-8");

      this._process.stderr.on("data", (data) =>
        console.log("ffmpeg::process::data [data:%o]", data)
      );
    }

    if (this._process.stdout) {
      this._process.stdout.setEncoding("utf-8");

      this._process.stdout.on("data", (data) =>
        console.log("ffmpeg::process::data [data:%o]", data)
      );
    }

    this._process.on("message", (message) =>
      console.log("ffmpeg::process::message [message:%o]", message)
    );

    this._process.on("error", (error) =>
      console.error("ffmpeg::process::error [error:%o]", error)
    );

    this._process.once("close", () => {
      console.log("ffmpeg::process::close");
      this._observer.emit("process-close");
    });

    sdpStream.on("error", (error) =>
      console.error("sdpStream::error [error:%o]", error)
    );

    // Pipe sdp stream to the ffmpeg process
    sdpStream.resume();
    sdpStream.pipe(this._process.stdin);
  }

  kill() {
    console.log("kill() [pid:%d]", this._process.pid);
    this._process.kill("SIGINT");
  }

  get _commandArgs() {
    let commandArgs = [
      "-loglevel",
      "debug",
      "-protocol_whitelist",
      "pipe,udp,rtp",
      "-fflags",
      "+genpts",
      "-f",
      "sdp",
      "-i",
      "pipe:0",
    ];

    commandArgs = commandArgs.concat(this._videoArgs);
    commandArgs = commandArgs.concat(this._audioArgs);

    commandArgs = commandArgs.concat([
      "-flags",
      "+global_header",
      `${RECORD_FILE_LOCATION_PATH}/${this._rtpParameters.fileName}.webm`,
    ]);

    console.log("commandArgs:%o", commandArgs);

    return commandArgs;
  }

  get _videoArgs() {
    return ["-map", "0:v:0", "-c:v", "copy"];
  }

  get _audioArgs() {
    return [
      "-map",
      "0:a:0",
      "-strict", // libvorbis is experimental
      "-2",
      "-c:a",
      "copy",
    ];
  }
};


  


  My implementation of creation of this class' instance :

  


  async startRecord() {
    if (this._isRecording) return;

    this._isRecording = true;
    let recordInfo = {};
    const joinedPeers = this._getJoinedPeers();
    for (const peer of joinedPeers) {
      for (const producer of peer.data.producers.values()) {
        recordInfo[producer.kind] = await this.publishProducerRtpStream(
          peer,
          producer
        );
        recordInfo.fileName = Date.now().toString();

        peer.data.process = this.getProcess(recordInfo);
        setTimeout(async () => {
          console.log(peer.data.process);
          // I want to call peer.data.process.kill() HERE!
        }, 4000);
      }
    }
  }
  async getProcess(recordInfo) {
    return new FFmpeg(recordInfo);
  }


  


  I want to call the kill() function in FFmpeg and it shows undefined. Really don't understand how.

  


  Here's the log of the object instance (which doesn't have the "kill" function mentioned anywhere and maybe hence shows that .kill() is undefined)

  


  

  


  Would greatly appreciate any help.
Thanks !