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Android h264 decode non-existing PPS 0 referenced

8 juin 2023, par nmxprime

In Android JNI, using ffmpeg with libx264 use below codes to encode and decode raw rgb data!. I should use swscale to convert rgb565 to yuv420p as required by H.264. But not clear about this conversion.Please help, where i am wrong, with regard the log i get!

Code for Encoding

codecinit()- called once(JNI wrapper function)

int Java_com_my_package_codecinit (JNIEnv *env, jobject thiz) {
avcodec_register_all();
codec = avcodec_find_encoder(AV_CODEC_ID_H264);//AV_CODEC_ID_MPEG1VIDEO);
if(codec->id == AV_CODEC_ID_H264)
    __android_log_write(ANDROID_LOG_ERROR, "set","h264_encoder");

if (!codec) {
    fprintf(stderr, "codec not found\n");
    __android_log_write(ANDROID_LOG_ERROR, "codec", "not found");

}
    __android_log_write(ANDROID_LOG_ERROR, "codec", "alloc-contest3");
c= avcodec_alloc_context3(codec);
if(c == NULL)
    __android_log_write(ANDROID_LOG_ERROR, "avcodec","context-null");

picture= av_frame_alloc();

if(picture == NULL)
    __android_log_write(ANDROID_LOG_ERROR, "picture","context-null");

c->bit_rate = 400000;
c->height = 800;
c->time_base= (AVRational){1,25};
c->gop_size = 10; 
c->max_b_frames=1;
c->pix_fmt = AV_PIX_FMT_YUV420P;
outbuf_size = 768000;
c->width = 480;

size = (c->width * c->height);

if (avcodec_open2(c, codec,NULL) < 0) {

__android_log_write(ANDROID_LOG_ERROR, "codec", "could not open");


}

ret = av_image_alloc(picture->data, picture->linesize, c->width, c->height,
                     c->pix_fmt, 32);
if (ret < 0) {
        __android_log_write(ANDROID_LOG_ERROR, "image","alloc-failed");
    fprintf(stderr, "could not alloc raw picture buffer\n");

}

picture->format = c->pix_fmt;
picture->width  = c->width;
picture->height = c->height;
return 0;

}

encodeframe()-called in a while loop

int Java_com_my_package_encodeframe (JNIEnv *env, jobject thiz,jbyteArray buffer) {
jbyte *temp= (*env)->GetByteArrayElements(env, buffer, 0);
Output = (char *)temp;
const uint8_t * const inData[1] = { Output }; 
const int inLinesize[1] = { 2*c->width };

//swscale should implement here

    av_init_packet(&pkt);
    pkt.data = NULL;    // packet data will be allocated by the encoder
    pkt.size = 0;

    fflush(stdout);
picture->data[0] = Output;
ret = avcodec_encode_video2(c, &pkt, picture,&got_output);

    fprintf(stderr,"ret = %d, got-out = %d \n",ret,got_output);
     if (ret < 0) {
                __android_log_write(ANDROID_LOG_ERROR, "error","encoding");
        if(got_output > 0)
        __android_log_write(ANDROID_LOG_ERROR, "got_output","is non-zero");

    }

    if (got_output) {
        fprintf(stderr,"encoding frame %3d (size=%5d): (ret=%d)\n", 1, pkt.size,ret);
        fprintf(stderr,"before caling decode");
        decode_inline(&pkt); //function that decodes right after the encode
        fprintf(stderr,"after caling decode");


        av_free_packet(&pkt);
    }


fprintf(stderr,"y val: %d \n",y);


(*env)->ReleaseByteArrayElements(env, buffer, Output, 0);
return ((ret));
}

decode_inline() function

decode_inline(AVPacket *avpkt){
AVCodec *codec;
AVCodecContext *c = NULL;
int frame, got_picture, len = -1,temp=0;

AVFrame *rawFrame, *rgbFrame;
uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
char buf[1024];
char rawBuf[768000],rgbBuf[768000];

struct SwsContext *sws_ctx;

memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
avcodec_register_all();

c= avcodec_alloc_context3(codec);
if(c == NULL)
    __android_log_write(ANDROID_LOG_ERROR, "avcodec","context-null");

codec = avcodec_find_decoder(AV_CODEC_ID_H264);
if (!codec) {
    fprintf(stderr, "codec not found\n");
    fprintf(stderr, "codec = %p \n", codec);
    }
c->pix_fmt = AV_PIX_FMT_YUV420P;
c->width = 480;
c->height = 800;

rawFrame = av_frame_alloc();
rgbFrame = av_frame_alloc();

if (avcodec_open2(c, codec, NULL) < 0) {
    fprintf(stderr, "could not open codec\n");
    exit(1);
    }
sws_ctx = sws_getContext(c->width, c->height,/*PIX_FMT_RGB565BE*/
            PIX_FMT_YUV420P, c->width, c->height, AV_PIX_FMT_RGB565/*PIX_FMT_YUV420P*/,
            SWS_BILINEAR, NULL, NULL, NULL);


frame = 0;

unsigned short *decodedpixels = &rawBuf;
rawFrame->data[0] = &rawBuf;
rgbFrame->data[0] = &rgbBuf;

fprintf(stderr,"size of avpkt %d \n",avpkt->size);
temp = avpkt->size;
while (temp > 0) {
        len = avcodec_decode_video2(c, rawFrame, &got_picture, avpkt);

        if (len < 0) {
            fprintf(stderr, "Error while decoding frame %d\n", frame);
            exit(1);
            }
        temp -= len;
        avpkt->data += len;

        if (got_picture) {
            printf("saving frame %3d\n", frame);
            fflush(stdout);
        //TODO  
        //memcpy(decodedpixels,rawFrame->data[0],rawFrame->linesize[0]); 
        //  decodedpixels +=rawFrame->linesize[0];

            frame++;
            }

        }

avcodec_close(c);
av_free(c);
//free(rawBuf);
//free(rgbBuf);
av_frame_free(&rawFrame);
av_frame_free(&rgbFrame);

}

The log i get

For the decode_inline() function:

01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] non-existing PPS 0 referenced
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] decode_slice_header error
01-02 14:50:50.160: I/stderr(3407): [h264 @ 0x8db540] Invalid mix of idr and non-idr slices
01-02 14:50:50.160: I/stderr(3407): Error while decoding frame 0

Edit: Changing GOP value:

If i change c->gop_size = 3; as expected it emits one I frame every three frames. The non-existing PPS 0 referenced message is not there for in every third execution, but all other have this message

Flutter PNG screenshots are not working properly with FFMPEG

7 juin 2023, par segga

I'm trying to convert screenshots I took in my flutter app programmatically to an .mp4 video, but the video is just black/blank. I'm using PNG to encode the images saved and the .PNG extension too. This is the code base I'm currently using and I expected to be able to use these images with ffmpeg. I also tried the ImageFormat.rawRgba or so but I don't think I used that properly

import 'dart:io';
import 'package:flutter/rendering.dart';

void captureScreenshot() async {
  try {
    RenderRepaintBoundary boundary = globalKey.currentContext!.findRenderObject() as RenderRepaintBoundary;
    ui.Image image = await boundary.toImage(pixelRatio: 1.0);
    ByteData? byteData = await image.toByteData(format: ui.ImageByteFormat.png);
    Uint8List imageData = byteData!.buffer.asUint8List();

    // Save the image to a file
    File file = File('/path/to/screenshot.png');
    await file.writeAsBytes(imageData);
    print('Screenshot saved successfully!');
  } catch (e) {
    print('Error capturing screenshot: $e');
  }
}

How to extract per Coding Tree Unit (CTU) Quantization Parameter (QP) from a h.265 encoded video [closed]

16 avril 2023, par ali falahati

I want to extract and analyze per CTU or per macro-block information such as QP value from a encoded video file.

All the methods I found are either changing the ffmpeg source code or deprecated tools. Also other questions are not answered correctly. I wanted to know if there is a simple, straight forward and up to date tutorial on how to extract QP values from an encoded video file using tools such as HM or ffmpeg. Even if the only way to do it is to change the source code of ffmpeg please provide a clear explanation of what to do and change.

How to fix the "No working C compiler found." problem for compiling x264 in Linux ?

27 février 2023, par gc xu

Firstly I have read all other solutions related to this problem, including adding path and reinstall yasm, nasm, gcc... I git clone the source code from https://code.videolan.org/videolan/x264.git. Then, I run command ./configure, it shows

./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
No working C compiler found.

I check the file "config.log". It shows:

checking for -Werror=unknown-warning-option... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=unknown-warning-option   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=unknown-attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=unknown-attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=ignored-attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=ignored-attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
x264 configure script
Command line options: "--enable-shared" "--enable-static"

checking whether gcc works... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c -m64  -Wall -I. -I$(SRCPATH)     -m64  -lm -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
DIED: No working C compiler found.

Plus I wonder is there something to do with nasm? Becasuse I install nasm with some C grammer problems:

./config/config.h:659:16: error: duplicate ‘unsigned’
  659 | #define size_t unsigned int
      |                ^~~~~~~~
./config/config.h:659:25: error: two or more data types in declaration specifiers
  659 | #define size_t unsigned int
      |                         ^~~
In file included from /usr/include/string.h:633,
                 from ./include/compiler.h:89,
                 from asm/nasm.c:38:
./include/compiler.h:241:7: error: expected identifier or ‘(’ before ‘__extension__’
  241 | char *strsep(char **, const char *);
      |       ^~~~~~
./include/compiler.h:241:7: error: expected identifier or ‘(’ before ‘)’ token
  241 | char *strsep(char **, const char *);
      |       ^~~~~~
make[1]: *** [asm/nasm.o] Error 1
make[1]: Leaving directory `/mnt/nfs0/gengcheng/ffmpeg-5.0.2/nasm-2.15.05'
make: *** [all] Error 2

I have read all other solutions related to this problem, including adding path and reinstall yasm, nasm, gcc... I want to install x264 to configure it in ffmpeg. Thanks for all your answers!

How to use x264 encoder in Ant Media Server v2.5

26 février 2023, par faraway

Ant Media Server starts to use OpenH264 as a software encoder in v2.5 but I need to use x264. How can I use x264 in Ant Media Server v2.5?

https://github.com/ant-media/Ant-Media-Server/releases/tag/ams-v2.5.0 https://antmedia.io

1 | ... | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | ... | 89

Newest 'libx264' Questions - Stack Overflow

Les articles publiés sur le site

Android h264 decode non-existing PPS 0 referenced

Code for Encoding

codecinit()- called once(JNI wrapper function)

encodeframe()-called in a while loop

decode_inline() function

The log i get

Edit: Changing GOP value:

Flutter PNG screenshots are not working properly with FFMPEG

How to extract per Coding Tree Unit (CTU) Quantization Parameter (QP) from a h.265 encoded video [closed]

How to fix the "No working C compiler found." problem for compiling x264 in Linux ?

How to use x264 encoder in Ant Media Server v2.5

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