Opened 10 years ago

Closed 10 years ago

#3229 closed defect (fixed)

Wrong field order for mjpeg

Reported by: hxuanyu Owned by:
Priority: normal Component: avcodec
Version: git-master Keywords: mjpeg
Cc: ami_stuff@o2.pl Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description (last modified by Carl Eugen Hoyos)

used ffplay to play 2 videos (both MJPEG encoded AVI file, generated by same program).

While the video having relative low resolution plays correctly, the higher resolution one show bad images.

below is the output of bad file

$ ffplay.exe bad.avi
ffplay version N-58485-ga12b4bd Copyright (c) 2003-2013 the FFmpeg developers
  built on Nov 26 2013 22:01:46 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 55.100 / 52. 55.100
  libavcodec     55. 44.100 / 55. 44.100
  libavformat    55. 21.102 / 55. 21.102
  libavdevice    55.  5.101 / 55.  5.101
  libavfilter     3. 91.100 /  3. 91.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
[avi @ 04012d40] Stream #1: not enough frames to estimate rate; consider increasing probesize
Input #0, avi, from 'bad.avi':
  Duration: 00:00:06.03, start: 0.000000, bitrate: 40053 kb/s
    Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc), 468x312, 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
[swscaler @ 040d66e0] deprecated pixel format used, make sure you did set range correctly
   2.14 A-V: -0.023 fd=   0 aq=   24KB vq= 1767KB sq=    0B f=0/0
   4.58 A-V: -0.024 fd=   0 aq=   20KB vq= 1753KB sq=    0B f=0/0

Samples files are here
​https://dl.dropboxusercontent.com/u/89678527/good.avi
​https://dl.dropboxusercontent.com/u/89678527/bad.avi

and please see attached screen shot

Attachments (1)

cmp.JPG​ (111.8 KB ) - added by hxuanyu 10 years ago.

Download all attachments as: .zip

Change History (8)

by hxuanyu, 10 years ago

Attachment: cmp.JPG​ added

comment:1 by Carl Eugen Hoyos, 10 years ago

Component: undetermined → avcodec
Description: modified (diff)
Keywords: mjpeg added
Reproduced by developer: set
Status: new → open
Version: unspecified → git-master

Looks much nicer with mplayer -vc mjpeg

comment:2 by Carl Eugen Hoyos, 10 years ago 

$ ffmpeg -loglevel debug -i bad.avi
ffmpeg version N-59134-g1c67ad9 Copyright (c) 2000-2013 the FFmpeg developers
  built on Dec 16 2013 02:32:20 with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl
  libavutil      52. 58.100 / 52. 58.100
  libavcodec     55. 45.101 / 55. 45.101
  libavformat    55. 22.100 / 55. 22.100
  libavdevice    55.  5.102 / 55.  5.102
  libavfilter     3. 92.100 /  3. 92.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-i' ... matched as input file with argument 'bad.avi'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input file bad.avi.
Successfully parsed a group of options.
Opening an input file: bad.avi.
[avi @ 0x3731100] Format avi probed with size=2048 and score=100
[avi @ 0x3731760] use odml:1
st:1 removing common factor 4 from timebase
[avi @ 0x3731100] Before avformat_find_stream_info() pos: 32390 bytes read:140776 seeks:6
[avi @ 0x3731100] parser not found for codec pcm_s16le, packets or times may be invalid.
[mjpeg @ 0x3731ba0] marker=d8 avail_size_in_buf=239529
[mjpeg @ 0x3731ba0] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x3731ba0] marker=e0 avail_size_in_buf=239527
[mjpeg @ 0x3731ba0] polarity 1
[mjpeg @ 0x3731ba0] marker parser used 15 bytes (120 bits)
[mjpeg @ 0x3731ba0] marker=dd avail_size_in_buf=239509
[mjpeg @ 0x3731ba0] restart interval: 0
[mjpeg @ 0x3731ba0] marker parser used 4 bytes (32 bits)
[mjpeg @ 0x3731ba0] marker=db avail_size_in_buf=239503
[mjpeg @ 0x3731ba0] index=0
[mjpeg @ 0x3731ba0] qscale[0]: 0
[mjpeg @ 0x3731ba0] index=1
[mjpeg @ 0x3731ba0] qscale[1]: 0
[mjpeg @ 0x3731ba0] marker parser used 132 bytes (1056 bits)
[mjpeg @ 0x3731ba0] marker=c0 avail_size_in_buf=239369
[mjpeg @ 0x3731ba0] sof0: picture: 468x156
[mjpeg @ 0x3731ba0] component 0 2:1 id: 0 quant:0
[mjpeg @ 0x3731ba0] component 1 1:1 id: 1 quant:1
[mjpeg @ 0x3731ba0] component 2 1:1 id: 2 quant:1
[mjpeg @ 0x3731ba0] pix fmt id 21111100
[mjpeg @ 0x3731ba0] marker parser used 17 bytes (136 bits)
[mjpeg @ 0x3731ba0] escaping removed 119331 bytes
[mjpeg @ 0x3731ba0] marker=da avail_size_in_buf=239350
[mjpeg @ 0x3731ba0] component: 0
[mjpeg @ 0x3731ba0] component: 1
[mjpeg @ 0x3731ba0] component: 2
[mjpeg @ 0x3731ba0] marker parser used 120018 bytes (960141 bits)
[mjpeg @ 0x3731ba0] marker=d9 avail_size_in_buf=118322
[mjpeg @ 0x3731ba0] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x3731ba0] marker=d8 avail_size_in_buf=118318
[mjpeg @ 0x3731ba0] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x3731ba0] marker=e0 avail_size_in_buf=118316
[mjpeg @ 0x3731ba0] polarity 2
[mjpeg @ 0x3731ba0] marker parser used 15 bytes (120 bits)
[mjpeg @ 0x3731ba0] marker=dd avail_size_in_buf=118298
[mjpeg @ 0x3731ba0] restart interval: 0
[mjpeg @ 0x3731ba0] marker parser used 4 bytes (32 bits)
[mjpeg @ 0x3731ba0] marker=db avail_size_in_buf=118292
[mjpeg @ 0x3731ba0] index=0
[mjpeg @ 0x3731ba0] qscale[0]: 0
[mjpeg @ 0x3731ba0] index=1
[mjpeg @ 0x3731ba0] qscale[1]: 0
[mjpeg @ 0x3731ba0] marker parser used 132 bytes (1056 bits)
[mjpeg @ 0x3731ba0] marker=c0 avail_size_in_buf=118158
[mjpeg @ 0x3731ba0] sof0: picture: 468x156
[mjpeg @ 0x3731ba0] component 0 2:1 id: 0 quant:0
[mjpeg @ 0x3731ba0] component 1 1:1 id: 1 quant:1
[mjpeg @ 0x3731ba0] component 2 1:1 id: 2 quant:1
[mjpeg @ 0x3731ba0] marker parser used 17 bytes (136 bits)
[mjpeg @ 0x3731ba0] escaping removed 900 bytes
[mjpeg @ 0x3731ba0] marker=da avail_size_in_buf=118139
[mjpeg @ 0x3731ba0] component: 0
[mjpeg @ 0x3731ba0] component: 1
[mjpeg @ 0x3731ba0] component: 2
[mjpeg @ 0x3731ba0] marker parser used 117238 bytes (937904 bits)
[mjpeg @ 0x3731ba0] marker=d9 avail_size_in_buf=2
[mjpeg @ 0x3731ba0] decode frame unused 2 bytes
[avi @ 0x3731100] Probe buffer size limit of 5000000 bytes reached
[avi @ 0x3731100] Stream #1: not enough frames to estimate rate; consider increasing probesize
[avi @ 0x3731100] After avformat_find_stream_info() pos: 5167988 bytes read:5276374 seeks:6 frames:21
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, avi, from 'bad.avi':
  Duration: 00:00:06.03, start: 0.000000, bitrate: 40053 kb/s
    Stream #0:0, 21, 1/30: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc), 468x312, 1/30, 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0:1, 0, 1/44100: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
Successfully opened the file.
At least one output file must be specified
[AVIOContext @ 0x37397c0] Statistics: 5276374 bytes read, 6 seeks

comment:3 by ami_stuff, 10 years ago

Cc: ami_stuff@o2.pl added

It's a problem with fields' order.

This quick hack fixes it:

libavcoedec/mjpegdec.c:

    if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
        s->interlace_polarity = 1;           /* bottom field first */
        av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
    }
    if (avctx->codec->id == AV_CODEC_ID_AMV)
        s->flipped = 1;
        
+        s->interlace_polarity = 1;

    return 0;

Also WMP plays the file correctly.

in reply to:  3 comment:4 by hxuanyu, 10 years ago

Replying to ami_stuff:

It's a problem with fields' order.

This quick hack fixes it:

libavcoedec/mjpegdec.c:

    if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
        s->interlace_polarity = 1;           /* bottom field first */
        av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
    }
    if (avctx->codec->id == AV_CODEC_ID_AMV)
        s->flipped = 1;
        
+        s->interlace_polarity = 1;

    return 0;

Also WMP plays the file correctly.

Yes, it works!

comment:5 by Carl Eugen Hoyos, 10 years ago

Additional sample Test.mp4 (which is an avi file) from forum also uploaded to ​http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket3229/

comment:6 by Carl Eugen Hoyos, 10 years ago

Summary: ffplay shows bad images → Wrong field order for mjpeg

comment:7 by Michael Niedermayer, 10 years ago

Resolution: → fixed
Status: open → closed

Fixed in dde16f5aaed327e15049b40a8dfae1f59647e4ec

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