[FFmpeg-trac] #3090(undetermined:new): h264 decoder returns bad image
FFmpeg
trac at avcodec.org
Tue Oct 29 02:27:40 CET 2013
#3090: h264 decoder returns bad image
-------------------------------------+-------------------------------------
Reporter: hxuanyu | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
it's reproducible on 2.0.1 but not reproducible on 1.1.3.
I found it when our program upgrading from 1.1.3 to 2.0.1. On the attached
file, video frames read out using 2.0.1 libs are not correct(1.1.3 is OK)
So I wrote a piece of code, directly dumping AVframes returned from
avcodec_decode_video2 to jpeg fomrat, and results are the same.
below is the code I used:
===========================================================================================
static int WriteJPG(AVCodecContext *pCodecCtx, AVFrame *pFrame, int
FrameNo){
AVCodecContext *pOCodecCtx;
AVCodec *pOCodec;
uint8_t *Buffer;
int BufSiz;
int BufSizActual;
enum AVPixelFormat ImgFmt = AV_PIX_FMT_YUVJ420P;
BufSiz =
avpicture_get_size(ImgFmt,pCodecCtx->width,pCodecCtx->height);
Buffer = (uint8_t *)av_malloc ( BufSiz );
if ( Buffer == NULL ) return ( 0 );
memset ( Buffer, 0, BufSiz );
pOCodecCtx = avcodec_alloc_context3(NULL);
if ( !pOCodecCtx ) {
av_free ( Buffer );
return ( 0 );
}
pOCodecCtx->bit_rate = pCodecCtx->bit_rate;
pOCodecCtx->width = pCodecCtx->width;
pOCodecCtx->height = pCodecCtx->height;
pOCodecCtx->pix_fmt = ImgFmt;
pOCodecCtx->codec_id = AV_CODEC_ID_MJPEG;
pOCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
pOCodecCtx->time_base.num = pCodecCtx->time_base.num;
pOCodecCtx->time_base.den = pCodecCtx->time_base.den;
pOCodec = avcodec_find_encoder ( pOCodecCtx->codec_id );
if ( !pOCodec ) {
free ( Buffer );
return ( 0 );
}
if ( avcodec_open2 ( pOCodecCtx, pOCodec, NULL ) < 0 ) {
free ( Buffer );
return ( 0 );
}
pOCodecCtx->mb_lmin = pOCodecCtx->lmin = pOCodecCtx->qmin
* 118;
pOCodecCtx->mb_lmax = pOCodecCtx->lmax = pOCodecCtx->qmax
* 118;
pOCodecCtx->flags = CODEC_FLAG_QSCALE;
pOCodecCtx->global_quality = pOCodecCtx->qmin * 118;
pFrame->pts = 1;
pFrame->quality = pOCodecCtx->global_quality;
BufSizActual =
avcodec_encode_video(pOCodecCtx,Buffer,BufSiz,pFrame);
char filename[260];
sprintf(filename, "C:\\image\\%06d.jpg", FrameNo );
FILE* JPEGFile = fopen (filename, "wb");
fwrite ( Buffer, 1, BufSizActual, JPEGFile );
fclose ( JPEGFile );
avcodec_close ( pOCodecCtx );
av_free ( Buffer );
return ( BufSizActual );
}
static int open_codec_context(int *stream_idx,
AVFormatContext *fmt_ctx, enum AVMediaType
type)
{
int ret;
AVStream *st;
AVCodecContext *dec_ctx = NULL;
AVCodec *dec = NULL;
ret = av_find_best_stream(fmt_ctx, type, -1, -1, NULL, 0);
if (ret < 0) {
//fprintf(stderr, "Could not find %s stream in input file '%s'\n",
// av_get_media_type_string(type), src_filename);
return ret;
} else {
*stream_idx = ret;
st = fmt_ctx->streams[*stream_idx];
/* find decoder for the stream */
dec_ctx = st->codec;
dec = avcodec_find_decoder(dec_ctx->codec_id);
if (!dec) {
fprintf(stderr, "Failed to find %s codec\n",
av_get_media_type_string(type));
return ret;
}
if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0) {
fprintf(stderr, "Failed to open %s codec\n",
av_get_media_type_string(type));
return ret;
}
}
return 0;
}
int main(int argc, char **argv)
{
int ret;
if (argc == 1) {
printf("no argument provided, exit ************** \n");
return 0;
}
const char *src_filename = argv[1];
avcodec_register_all();
av_register_all();
AVFormatContext *pFormatCtx = NULL;
if (avformat_open_input(&pFormatCtx, src_filename, NULL, NULL) < 0) {
fprintf(stderr, "Could not open source file %s\n", src_filename);
exit(1);
}
if (avformat_find_stream_info(pFormatCtx, NULL) < 0) {
fprintf(stderr, "Could not find stream information\n");
exit(1);
}
int video_stream_idx = -1, audio_stream_idx = -1;
AVStream *video_stream;
AVCodecContext *pCodecCtx = NULL;
if (open_codec_context(&video_stream_idx, pFormatCtx,
AVMEDIA_TYPE_VIDEO) >= 0) {
video_stream = pFormatCtx->streams[video_stream_idx];
pCodecCtx = video_stream->codec;
printf("video stream index = %d", video_stream_idx);
}
AVCodec* pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
avcodec_open2(pCodecCtx, pCodec, NULL);
AVFrame *frame = avcodec_alloc_frame();
AVPacket pkt;
av_init_packet(&pkt);
pkt.data = NULL;
pkt.size = 0;
int frameFinished = 0;
int count = 0;
while (av_read_frame(pFormatCtx, &pkt) >= 0) {
printf("frame %d\n", count++);
AVFrame* pFrame = avcodec_alloc_frame();
int ret = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished,
&pkt);
if (ret < 0) {
avcodec_free_frame(&pFrame);
continue;
}
if (frameFinished) {
// dump to jpeg
WriteJPG(pCodecCtx, pFrame, count++);
}
avcodec_free_frame(&pFrame);
}
return 1;
}
===========================================================================================
and when I ran this test program with 17, I saw these logs. But the
strange thing is ffplay plays
this file correctly and I didn't see similar errors.
[avi @ 00794000] non-interleaved AVI
[h264 @ 013a8280] error while decoding MB 31 16, bytestream (-6)
[h264 @ 013a8280] concealing 423 DC, 423 AC, 423 MV errors in I frame
[h264 @ 013a8280] error while decoding MB 38 24, bytestream (-37)
[h264 @ 013a8280] Cannot use next picture in error concealment
[h264 @ 013a8280] concealing 56 DC, 56 AC, 56 MV errors in P frame
[h264 @ 013a8280] error while decoding MB 16 24, bytestream (-10)
[h264 @ 013a8280] Cannot use next picture in error concealment
[h264 @ 013a8280] concealing 78 DC, 78 AC, 78 MV errors in P frame
[h264 @ 013a8280] error while decoding MB 38 24, bytestream (-8)
[h264 @ 013a8280] Cannot use next picture in error concealment
[h264 @ 013a8280] concealing 56 DC, 56 AC, 56 MV errors in P frame
[h264 @ 013a8280] error while decoding MB 43 24, bytestream (-6)
[h264 @ 013a8280] Cannot use next picture in error concealment
[h264 @ 013a8280] concealing 51 DC, 51 AC, 51 MV errors in P frame
[h264 @ 013a8280] error while decoding MB 38 24, bytestream (-9)
[h264 @ 013a8280] Cannot use next picture in error concealment
[h264 @ 013a8280] concealing 56 DC, 56 AC, 56 MV errors in P frame
[h264 @ 01755ae0] error while decoding MB 31 16, bytestream (-6)
[h264 @ 01755ae0] concealing 423 DC, 423 AC, 423 MV errors in I frame
[h264 @ 015aa720] error while decoding MB 38 24, bytestream (-35)
[h264 @ 015aa720] Cannot use next picture in error concealment
[h264 @ 015aa720] concealing 56 DC, 56 AC, 56 MV errors in P frame
[h264 @ 016a0060] error while decoding MB 16 24, bytestream (-10)
[h264 @ 016a0060] Cannot use next picture in error concealment
[h264 @ 016a0060] concealing 78 DC, 78 AC, 78 MV errors in P frame
[h264 @ 01755ae0] error while decoding MB 38 24, bytestream (-8)
[h264 @ 01755ae0] Cannot use next picture in error concealment
[h264 @ 01755ae0] concealing 56 DC, 56 AC, 56 MV errors in P frame
[h264 @ 015aa720] error while decoding MB 43 24, bytestream (-6)
[h264 @ 015aa720] Cannot use next picture in error concealment
[h264 @ 015aa720] concealing 51 DC, 51 AC, 51 MV errors in P frame
[h264 @ 016a0060] error while decoding MB 38 24, bytestream (-9)
[h264 @ 016a0060] Cannot use next picture in error concealment
[h264 @ 016a0060] concealing 56 DC, 56 AC, 56 MV errors in P frame
[h264 @ 01755ae0] error while decoding MB 39 24, bytestream (-10)
[h264 @ 01755ae0] Cannot use next picture in error concealment
[h264 @ 01755ae0] concealing 55 DC, 55 AC, 55 MV errors in P frame
[h264 @ 015aa720] error while decoding MB 6 24, bytestream (-10)
[h264 @ 015aa720] Cannot use next picture in error concealment
[h264 @ 015aa720] concealing 88 DC, 88 AC, 88 MV errors in P frame
[h264 @ 016a0060] error while decoding MB 39 24, bytestream (-8)
[h264 @ 016a0060] concealing 55 DC, 55 AC, 55 MV errors in I frame
[h264 @ 01755ae0] error while decoding MB 40 24, bytestream (-5)
[h264 @ 01755ae0] Cannot use next picture in error concealment
[h264 @ 01755ae0] concealing 54 DC, 54 AC, 54 MV errors in P frame
[h264 @ 015aa720] error while decoding MB 40 24, bytestream (-5)
[h264 @ 015aa720] concealing 54 DC, 54 AC, 54 MV errors in I frame
[h264 @ 016a0060] error while decoding MB 44 19, bytestream (-26)
[h264 @ 016a0060] Cannot use next picture in error concealment
[h264 @ 016a0060] concealing 275 DC, 275 AC, 275 MV errors in P frame
[h264 @ 01755ae0] error while decoding MB 36 20, bytestream (-5)
[h264 @ 01755ae0] concealing 238 DC, 238 AC, 238 MV errors in I frame
[h264 @ 015aa720] error while decoding MB 31 24, bytestream (-4)
[h264 @ 015aa720] Cannot use next picture in error concealment
[h264 @ 015aa720] concealing 63 DC, 63 AC, 63 MV errors in P frame
[h264 @ 016a0060] error while decoding MB 40 24, bytestream (-6)
[h264 @ 016a0060] Cannot use next picture in error concealment
[h264 @ 016a0060] concealing 54 DC, 54 AC, 54 MV errors in P frame
[h264 @ 01755ae0] error while decoding MB 43 24, bytestream (-6)
[h264 @ 01755ae0] Cannot use next picture in error concealment
[h264 @ 01755ae0] concealing 51 DC, 51 AC, 51 MV errors in P frame
[h264 @ 015aa720] error while decoding MB 3 24, bytestream (-5)
[h264 @ 015aa720] Cannot use next picture in error concealment
[h264 @ 015aa720] concealing 91 DC, 91 AC, 91 MV errors in P frame
[h264 @ 016a0060] error while decoding MB 31 24, bytestream (-5)
[h264 @ 016a0060] concealing 63 DC, 63 AC, 63 MV errors in I frame
[h264 @ 01755ae0] error while decoding MB 43 16, bytestream (-6)
[h264 @ 01755ae0] concealing 411 DC, 411 AC, 411 MV errors in I frame
[h264 @ 015aa720] error while decoding MB 39 24, bytestream (-5)
[h264 @ 015aa720] concealing 55 DC, 55 AC, 55 MV errors in I frame
[h264 @ 016a0060] error while decoding MB 38 24, bytestream (-5)
[h264 @ 016a0060] concealing 56 DC, 56 AC, 56 MV errors in I frame
[h264 @ 01755ae0] error while decoding MB 30 24, bytestream (-5)
[h264 @ 01755ae0] Cannot use next picture in error concealment
[h264 @ 01755ae0] concealing 64 DC, 64 AC, 64 MV errors in P frame
[h264 @ 015aa720] error while decoding MB 40 23, bytestream (-9)
[h264 @ 015aa720] concealing 99 DC, 99 AC, 99 MV errors in I frame
[h264 @ 016a0060] error while decoding MB 43 24, bytestream (-5)
[h264 @ 016a0060] concealing 51 DC, 51 AC, 51 MV errors in I frame
[h264 @ 01755ae0] error while decoding MB 35 24, bytestream (-6)
[h264 @ 01755ae0] [h264 @ 015aa720] Cannot use next picture in error
concealment
error while decoding MB 42 24, bytestream (-7)
[h264 @ 01755ae0] [h264 @ 015aa720] concealing 59 DC, 59 AC, 59 MV errors
in P frame
Cannot use next picture in error concealment
[h264 @ 015aa720] concealing 52 DC, 52 AC, 52 MV errors in P frame
[h264 @ 016a0060] error while decoding MB 43 24, bytestream (-6)
[h264 @ 016a0060] Cannot use next picture in error concealment
[h264 @ 016a0060] concealing 51 DC, 51 AC, 51 MV errors in P frame
[h264 @ 01755ae0] error while decoding MB 43 24, bytestream (-6)
[h264 @ 01755ae0] [h264 @ 015aa720] concealing 51 DC, 51 AC, 51 MV errors
in I frame
error while decoding MB 30 24, bytestream (-8)
[h264 @ 015aa720] concealing 64 DC, 64 AC, 64 MV errors in I frame
[h264 @ 016a0060] error while decoding MB 32 24, bytestream (-5)
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/3090>
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