[FFmpeg-trac] #6023(avcodec:new): support Transfer characteristic in DPX encoder
FFmpeg
trac at avcodec.org
Wed Dec 14 17:04:26 EET 2016
#6023: support Transfer characteristic in DPX encoder
--------------------------------------+---------------------------------
Reporter: dericed | Owner:
Type: defect | Status: new
Priority: normal | Component: avcodec
Version: git-master | Keywords: dpx
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
--------------------------------------+---------------------------------
Currently the DPX encoder only hardcodes a value when writing transfer
characteristics. In the encoder a '2' is written [1] in this value which
according to the DPX spec [2] means 'linear'.
In this command I'm trying to create a bt709 DPX but the output is simply
'linear'.
{{{
ffmpeg -f lavfi -i testsrc -color_trc bt709 -vframes 1 test.dpx
ffmpeg version N-44102-g457e933 Copyright (c) 2000-2016 the FFmpeg
developers
built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-457e933 --enable-
shared --enable-pthreads --enable-gpl --enable-version3 --enable-
hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-
ldflags= --enable-chromaprint --enable-ffplay --enable-libfreetype
--enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl
--disable-lzma --enable-vda
libavutil 55. 43.100 / 55. 43.100
libavcodec 57. 68.100 / 57. 68.100
libavformat 57. 60.100 / 57. 60.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 68.100 / 6. 68.100
libavresample 3. 2. 0 / 3. 2. 0
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, lavfi, from 'testsrc':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
[SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
Output #0, image2, to 'test.dpx':
Metadata:
encoder : Lavf57.60.100
Stream #0:0: Video: dpx, rgb24(unknown/unknown/bt709), 320x240 [SAR
1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
Metadata:
encoder : Lavc57.68.100 dpx
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> dpx (native))
Press [q] to stop, [?] for help
frame= 1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A
speed=21.8x
video:227kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
}}}
[1]
https://github.com/FFmpeg/FFmpeg/blob/e06ef9aa5fe8a423ab58997f0c99112bb415b947/libavcodec/dpxenc.c#L221
[2]
https://web.archive.org/web/20050706060025/http://www.smpte.org/smpte_store/standards/pdf/s268m.pdf.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6023>
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