Hello i've try to decode JPG image from FS so, i create and upload spiffs image (using /data directory and Arduino Ide Plugin )

On every jpg i've same error: "pjpeg_decode_init() failed with status 19"

here is my same code:

#include <TFT_eSPI.h> // Hardware-specific library#include <SPI.h>#include "GfxUi.h"TFT_eSPI tft = TFT_eSPI(); // Invoke custom library#define DEBUG#define LOAD_SPIFFSGfxUi ui = GfxUi(&tft);void writeFile(fs::FS &fs, const char * path, const char * message);void readFile(fs::FS &fs, const char * path);void listDir(fs::FS &fs, const char * dirname, uint8_t levels);void setup(void){  Serial.begin(115200);  Serial.print("Start");  SPIFFS.begin(true);  tft.begin();  tft.setRotation(3);  tft.fillScreen(TFT_BLACK);  listDir(SPIFFS, "/", 0);  fs::File jpeg = SPIFFS.open("/star.jpg", "r");  //readFile(SPIFFS, "/star.jpg");  boolean decoded = JpegDec.decodeFsFile(jpeg);  Serial.println("===============");  Serial.println("JPEG image info");  Serial.println("===============");  Serial.print  ("Width      :"); Serial.println(JpegDec.width);  Serial.print  ("Height     :"); Serial.println(JpegDec.height);  Serial.print  ("Components :"); Serial.println(JpegDec.comps);  Serial.print  ("MCU / row  :"); Serial.println(JpegDec.MCUSPerRow);  Serial.print  ("MCU / col  :"); Serial.println(JpegDec.MCUSPerCol);  Serial.print  ("Scan type  :"); Serial.println(JpegDec.scanType);  Serial.print  ("MCU width  :"); Serial.println(JpegDec.MCUWidth);  Serial.print  ("MCU height :"); Serial.println(JpegDec.MCUHeight);  Serial.println("===============");  Serial.println("");}void listDir(fs::FS &fs, const char * dirname, uint8_t levels){    Serial.printf("Listing directory: %s\r\n", dirname);    File root = fs.open(dirname);    if(!root){        Serial.println("- failed to open directory");        return;    }    if(!root.isDirectory()){        Serial.println(" - not a directory");        return;    }    File file = root.openNextFile();    while(file){        if(file.isDirectory()){            Serial.print("  DIR : ");            Serial.println(file.name());            if(levels){                listDir(fs, file.name(), levels -1);            }        } else {            Serial.print("  FILE: ");            Serial.print(file.name());            Serial.print("\tSIZE: ");            Serial.println(file.size());        }        file = root.openNextFile();    }}void readFile(fs::FS &fs, const char * path){    Serial.printf("Reading file: %s\r\n", path);    File file = fs.open(path);    if(!file || file.isDirectory()){        Serial.println("- failed to open file for reading");        return;    }    Serial.println("- read from file:");    while(file.available()){        Serial.write(file.read());    }}void writeFile(fs::FS &fs, const char * path, const char * message){    Serial.printf("Writing file: %s\r\n", path);    File file = fs.open(path, FILE_WRITE);    if(!file){        Serial.println("- failed to open file for writing");        return;    }    if(file.print(message)){        Serial.println("- file written");    } else {        Serial.println("- frite failed");    }}void loop() {}

Output from serial:

Listing directory: /  FILE: /logo.jpg       SIZE: 16346  FILE: /arduino.jpg    SIZE: 8426  FILE: /star.jpg       SIZE: 3853pjpeg_decode_init() failed with status 19 <--- here is===============JPEG image info===============Width      :0Height     :0Components :0MCU / row  :0MCU / col  :0Scan type  :0MCU width  :0MCU height :0===============

• 2
  19 is PJPG_NOT_JPEGgithub.com/Bodmer/JPEGDecoder/blob/master/src/picojpeg.h

  Juraj

  – Juraj♦

  2018-09-26 18:55:36 +00:00

  CommentedSep 26, 2018 at 18:55
• 1
  you should add a testif (jpeg) for file existence.

  Juraj

  – Juraj♦

  2018-09-26 18:58:20 +00:00

  CommentedSep 26, 2018 at 18:58

1 Answer1

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