-color_range AVOption appears to do nothing

[nichot20]

according to source -color_range <int> can take the following values:-
"0" auto
"1" 16-235
"2" 0-255

and it functions on encode and decode. However altering the option value appears to make no change to the way media is processed, either on input, or output.

Attached stills sources and script to generate outputs using variations in value attached.

[nichot20]

16-235 range image

[nichot20]

full range (0-255) image

[nichot20]

script to generate outputs using varying values of -color_range

[nichot20]

Viewing the resultant clips using the waveform monitor in kdenlive shows all 601 source permutations the same, and all rgb permutations the same, with the two batches differing by the level differences in the original file.

[llogan]

Is this reproducible with current git head? Also, please show your complete, uncut ffmpeg output.

[nichot20]

Still the same with as near current as I can keep up with.:-

tux-scripts/still2mov.sh bars-rgb.png

ffmpeg version N-32542-g3867035-by_Tim, Copyright (c) 2000-2011 the FFmpeg developers

built on Sep 13 2011 08:59:23 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585]
configuration: --prefix=/usr/local --shlibdir=/usr/local/lib64 --libdir=/usr/local/lib64 --mandir=/usr/local/man --incdir=/usr/local/include --extra-version=by_Tim --enable-gpl --enable-nonfree --enable-version3 --enable-pthreads --enable-x11grab --enable-libdc1394 --enable-libvpx --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libdirac --enable-libschroedinger --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-filter=drawtext --enable-static --disable-shared
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 12. 0 / 53. 12. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 40. 0 / 2. 40. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

[image2 @ 0x1317b00] max_analyze_duration 5000000 reached at 5000000
Input #0, image2, from 'bars-rgb.png':

Duration: 00:00:00.04, start: 0.000000, bitrate: N/A

Stream #0.0, 127, 1/25: Video: png, rgb24, 720x576, 1/25, 25 fps, 25 tbr, 25 tbn, 25 tbc

[buffer @ 0x1317a80] w:720 h:576 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x131d360] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x1318060] w:720 h:576 fmt:rgb24 -> w:720 h:576 fmt:uyvy422 flags:0x4
Output #0, avi, to 'bars-rgb.0.avi':

Metadata:

ISFT : Lavf53.12.0
Stream #0.0, 0, 1/25: Video: rawvideo (2vuy / 0x79757632), uyvy422, 720x576, 1/25, q=2-31, 200 kb/s, 25 tbn, 25 tbc

Stream mapping:

Stream #0.0 -> #0.0 (png -> rawvideo)

Press [q] to stop, ? for help
frame= 125 fps= 39 q=0.0 Lsize= 101258kB time=00:00:05.00 bitrate=165901.9kbits/s
video:101250kB audio:0kB global headers:0kB muxing overhead 0.008372%
ffmpeg version N-32542-g3867035-by_Tim, Copyright (c) 2000-2011 the FFmpeg developers

built on Sep 13 2011 08:59:23 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585]
configuration: --prefix=/usr/local --shlibdir=/usr/local/lib64 --libdir=/usr/local/lib64 --mandir=/usr/local/man --incdir=/usr/local/include --extra-version=by_Tim --enable-gpl --enable-nonfree --enable-version3 --enable-pthreads --enable-x11grab --enable-libdc1394 --enable-libvpx --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libdirac --enable-libschroedinger --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-filter=drawtext --enable-static --disable-shared
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 12. 0 / 53. 12. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 40. 0 / 2. 40. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

[image2 @ 0x1317cc0] max_analyze_duration 5000000 reached at 5000000
Input #0, image2, from 'bars-rgb.png':

Duration: 00:00:00.04, start: 0.000000, bitrate: N/A

Stream #0.0, 127, 1/25: Video: png, rgb24, 720x576, 1/25, 25 fps, 25 tbr, 25 tbn, 25 tbc

[buffer @ 0x1317b60] w:720 h:576 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x131d740] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x131b1a0] w:720 h:576 fmt:rgb24 -> w:720 h:576 fmt:uyvy422 flags:0x4
Output #0, avi, to '0.bars-rgb.avi':

Metadata:

ISFT : Lavf53.12.0
Stream #0.0, 0, 1/25: Video: rawvideo (2vuy / 0x79757632), uyvy422, 720x576, 1/25, q=2-31, 200 kb/s, 25 tbn, 25 tbc

Stream mapping:

Stream #0.0 -> #0.0 (png -> rawvideo)

Press [q] to stop, ? for help
frame= 125 fps= 37 q=0.0 Lsize= 101258kB time=00:00:05.00 bitrate=165901.9kbits/s
video:101250kB audio:0kB global headers:0kB muxing overhead 0.008372%
ffmpeg version N-32542-g3867035-by_Tim, Copyright (c) 2000-2011 the FFmpeg developers

built on Sep 13 2011 08:59:23 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585]
configuration: --prefix=/usr/local --shlibdir=/usr/local/lib64 --libdir=/usr/local/lib64 --mandir=/usr/local/man --incdir=/usr/local/include --extra-version=by_Tim --enable-gpl --enable-nonfree --enable-version3 --enable-pthreads --enable-x11grab --enable-libdc1394 --enable-libvpx --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libdirac --enable-libschroedinger --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-filter=drawtext --enable-static --disable-shared
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 12. 0 / 53. 12. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 40. 0 / 2. 40. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

[image2 @ 0x1317b00] max_analyze_duration 5000000 reached at 5000000
Input #0, image2, from 'bars-rgb.png':

Duration: 00:00:00.04, start: 0.000000, bitrate: N/A

Stream #0.0, 127, 1/25: Video: png, rgb24, 720x576, 1/25, 25 fps, 25 tbr, 25 tbn, 25 tbc

[buffer @ 0x1317a80] w:720 h:576 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x131d360] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x1318060] w:720 h:576 fmt:rgb24 -> w:720 h:576 fmt:uyvy422 flags:0x4
Output #0, avi, to 'bars-rgb.1.avi':

Metadata:

ISFT : Lavf53.12.0
Stream #0.0, 0, 1/25: Video: rawvideo (2vuy / 0x79757632), uyvy422, 720x576, 1/25, q=2-31, 200 kb/s, 25 tbn, 25 tbc

Stream mapping:

Stream #0.0 -> #0.0 (png -> rawvideo)

Press [q] to stop, ? for help
frame= 125 fps= 40 q=0.0 Lsize= 101258kB time=00:00:05.00 bitrate=165901.9kbits/s
video:101250kB audio:0kB global headers:0kB muxing overhead 0.008372%
ffmpeg version N-32542-g3867035-by_Tim, Copyright (c) 2000-2011 the FFmpeg developers

built on Sep 13 2011 08:59:23 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585]
configuration: --prefix=/usr/local --shlibdir=/usr/local/lib64 --libdir=/usr/local/lib64 --mandir=/usr/local/man --incdir=/usr/local/include --extra-version=by_Tim --enable-gpl --enable-nonfree --enable-version3 --enable-pthreads --enable-x11grab --enable-libdc1394 --enable-libvpx --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libdirac --enable-libschroedinger --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-filter=drawtext --enable-static --disable-shared
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 12. 0 / 53. 12. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 40. 0 / 2. 40. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

[image2 @ 0x1317cc0] max_analyze_duration 5000000 reached at 5000000
Input #0, image2, from 'bars-rgb.png':

Duration: 00:00:00.04, start: 0.000000, bitrate: N/A

Stream #0.0, 127, 1/25: Video: png, rgb24, 720x576, 1/25, 25 fps, 25 tbr, 25 tbn, 25 tbc

[buffer @ 0x1317b60] w:720 h:576 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x131d740] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x131b1a0] w:720 h:576 fmt:rgb24 -> w:720 h:576 fmt:uyvy422 flags:0x4
Output #0, avi, to '1.bars-rgb.avi':

Metadata:

ISFT : Lavf53.12.0
Stream #0.0, 0, 1/25: Video: rawvideo (2vuy / 0x79757632), uyvy422, 720x576, 1/25, q=2-31, 200 kb/s, 25 tbn, 25 tbc

Stream mapping:

Stream #0.0 -> #0.0 (png -> rawvideo)

Press [q] to stop, ? for help
frame= 125 fps= 40 q=0.0 Lsize= 101258kB time=00:00:05.00 bitrate=165901.9kbits/s
video:101250kB audio:0kB global headers:0kB muxing overhead 0.008372%
ffmpeg version N-32542-g3867035-by_Tim, Copyright (c) 2000-2011 the FFmpeg developers

built on Sep 13 2011 08:59:23 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585]
configuration: --prefix=/usr/local --shlibdir=/usr/local/lib64 --libdir=/usr/local/lib64 --mandir=/usr/local/man --incdir=/usr/local/include --extra-version=by_Tim --enable-gpl --enable-nonfree --enable-version3 --enable-pthreads --enable-x11grab --enable-libdc1394 --enable-libvpx --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libdirac --enable-libschroedinger --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-filter=drawtext --enable-static --disable-shared
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 12. 0 / 53. 12. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 40. 0 / 2. 40. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

[image2 @ 0x1317b00] max_analyze_duration 5000000 reached at 5000000
Input #0, image2, from 'bars-rgb.png':

Duration: 00:00:00.04, start: 0.000000, bitrate: N/A

Stream #0.0, 127, 1/25: Video: png, rgb24, 720x576, 1/25, 25 fps, 25 tbr, 25 tbn, 25 tbc

[buffer @ 0x1317a80] w:720 h:576 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x131d360] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x1318060] w:720 h:576 fmt:rgb24 -> w:720 h:576 fmt:uyvy422 flags:0x4
Output #0, avi, to 'bars-rgb.2.avi':

Metadata:

ISFT : Lavf53.12.0
Stream #0.0, 0, 1/25: Video: rawvideo (2vuy / 0x79757632), uyvy422, 720x576, 1/25, q=2-31, 200 kb/s, 25 tbn, 25 tbc

Stream mapping:

Stream #0.0 -> #0.0 (png -> rawvideo)

Press [q] to stop, ? for help
frame= 125 fps= 37 q=0.0 Lsize= 101258kB time=00:00:05.00 bitrate=165901.9kbits/s
video:101250kB audio:0kB global headers:0kB muxing overhead 0.008372%
ffmpeg version N-32542-g3867035-by_Tim, Copyright (c) 2000-2011 the FFmpeg developers

built on Sep 13 2011 08:59:23 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585]
configuration: --prefix=/usr/local --shlibdir=/usr/local/lib64 --libdir=/usr/local/lib64 --mandir=/usr/local/man --incdir=/usr/local/include --extra-version=by_Tim --enable-gpl --enable-nonfree --enable-version3 --enable-pthreads --enable-x11grab --enable-libdc1394 --enable-libvpx --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libdirac --enable-libschroedinger --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-filter=drawtext --enable-static --disable-shared
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 12. 0 / 53. 12. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 40. 0 / 2. 40. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

[image2 @ 0x1317cc0] max_analyze_duration 5000000 reached at 5000000
Input #0, image2, from 'bars-rgb.png':

Duration: 00:00:00.04, start: 0.000000, bitrate: N/A

Stream #0.0, 127, 1/25: Video: png, rgb24, 720x576, 1/25, 25 fps, 25 tbr, 25 tbn, 25 tbc

[buffer @ 0x1317b60] w:720 h:576 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x131d740] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x131b1a0] w:720 h:576 fmt:rgb24 -> w:720 h:576 fmt:uyvy422 flags:0x4
Output #0, avi, to '2.bars-rgb.avi':

Metadata:

ISFT : Lavf53.12.0
Stream #0.0, 0, 1/25: Video: rawvideo (2vuy / 0x79757632), uyvy422, 720x576, 1/25, q=2-31, 200 kb/s, 25 tbn, 25 tbc

Stream mapping:

Stream #0.0 -> #0.0 (png -> rawvideo)

Press [q] to stop, ? for help
frame= 125 fps= 40 q=0.0 Lsize= 101258kB time=00:00:05.00 bitrate=165901.9kbits/s
video:101250kB audio:0kB global headers:0kB muxing overhead 0.008372

[cehoyos]

color_range is an input option that allows you to force a colour range for h264 input.

Unfortunately, this is not what the documentation of the field in avcodec.h explains...
I am not sure if this a documentation bug or if the h264 decoder has a problem.

[nichot20]

Replying to cehoyos:

color_range is an input option that allows you to force a colour range for h264 input.

Unfortunately, this is not what the documentation of the field in avcodec.h explains...
I am not sure if this a documentation bug or if the h264 decoder has a problem.

Well if its only an input option for H264 material it may only be a documentation bug as this is not how I tested it it! (Being in avcodec.h and with the current documentation it appeared to have a wider scope so I tried with non H264 source and also on output)

Is this limitation to H264 input something you just happened to know, or is it documented elsewhere?

[cehoyos]

Replying to nichot20:

Is this limitation to H264 input something you just happened to know, or is it documented elsewhere?

Neither.
I searched the source for an actual use case;-)

[nichot20]

Replying to cehoyos:

Replying to nichot20:

Is this limitation to H264 input something you just happened to know, or is it documented elsewhere?

Neither.
I searched the source for an actual use case;-)

It would be good if it were of wider application, but in the meantime a documentation patch would help remove unwarranted expectations.

[richardpl]

This option needs clarification.