[FFmpeg-devel] JPEG2000 multiple SOC and SIZ

[Anton Novikov]

Hi everyone,
I'm reversing the recent version of r3d file format, and have encountered a
JPEG2000-related thing.
I've got a memory dump of something that seems to be JPEG2000, and modified
ffmpeg to consume it. The log follows:
[r3d @ 0x558d304077c0] test
[r3d @ 0x558d304077c0] error reading end atom
Input #0, r3d, from '/home/anek/src/red/frame2.without0.r3d':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: jpeg2000, bayer_rggb16le, 8192x4320, 24 fps, 24
tbr, 134286336 tbn, 134286336 tbc
    Metadata:
      filename        : ?
File 'frame.jpg' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (jpeg2000 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
Truncating packet of size 9496960 to 7595371
/home/anek/src/red/frame2.without0.r3d: corrupt input packet in stream 0
/home/anek/src/red/frame2.without0.r3d: Operation not permitted
[jpeg2000 @ 0x558d3041c280] SIZ
[jpeg2000 @ 0x558d3041c280] SIZ Rsiz=0x8040 2056 2168
[jpeg2000 @ 0x558d3041c280] POC
[jpeg2000 @ 0x558d3041c280] unsupported marker 0xFF79 at pos 0x70
[jpeg2000 @ 0x558d3041c280] COD
[jpeg2000 @ 0x558d3041c280] extra cblk styles E
[jpeg2000 @ 0x558d3041c280] QCD
[jpeg2000 @ 0x558d3041c280] SOT
    Last message repeated 3 times
[jpeg2000 @ 0x558d3041c280] Duplicate SOC at 3821997=0x3A51AD
[jpeg2000 @ 0x558d3041c280] SIZ
[jpeg2000 @ 0x558d3041c280] SIZ Rsiz=0x8040 2056 2168
[jpeg2000 @ 0x558d3041c280] POC
[jpeg2000 @ 0x558d3041c280] unsupported marker 0xFF79 at pos 0x3A5203
[jpeg2000 @ 0x558d3041c280] COD
[jpeg2000 @ 0x558d3041c280] extra cblk styles E
[jpeg2000 @ 0x558d3041c280] QCD
[jpeg2000 @ 0x558d3041c280] SOT
    Last message repeated 3 times
[jpeg2000 @ 0x558d3041c280] Progression order RPCL
    Last message repeated 3 times
[swscaler @ 0x558d30425900] deprecated pixel format used, make sure you did
set range correctly
[mjpeg @ 0x558d3040e780] removing common factors from framerate
Output #0, image2, to 'frame.jpg':
  Metadata:
    encoder         : Lavf58.27.103
    Stream #0:0: Video: mjpeg, yuvj444p(pc), 2056x2168, q=2-31, 200 kb/s,
24 fps, 24 tbn, 24 tbc
    Metadata:
      filename        : ?
      encoder         : Lavc58.52.102 mjpeg
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
[image2 @ 0x558d3040abc0] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 101000 >= 0
/home/anek/src/red/frame2.without0.r3d: Operation not permitted
frame=    1 fps=0.4 q=2.9 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=
0x
video:96kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown

picture dimensions are 8192x4320, but in JPEG2000 bytestream there are 2
SOC and SIZ markers with SIZ mentioning 2056x2168. The image is decoded,
but colors and area are wrong. What can I do?

Thanks,
Anton