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Why JPEG image looks different in two videos ?
28 septembre 2015, par user606521I have two frames :
f1.jpg
f2.jpg
And I am creating two videos :
./ffmpeg -i ./f%d.jpg -r 30 -y m1.mp4 # both frames 1 and 2
./ffmpeg -i ./f2.jpg -r 30 -y m2.mp4 # only frame 2For some reason frame 2 looks different in these two videos
Frame 2 from m1.mp4 :
$ ./ffmpeg -i m1.mp4 out1_%d.jpg
ffmpeg version 2.7.2 Copyright (c) 2000-2015 the FFmpeg developers
built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'm1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Duration: 00:00:00.07, start: 0.000000, bitrate: 478 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 980x100, 381 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
[swscaler @ 0x7f7f9a000600] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to 'out1_%d.jpg':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 980x100, q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.41.100 mjpeg
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
frame= 2 fps=0.0 q=1.6 Lsize=N/A time=00:00:00.06 bitrate=N/A
video:6kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Frame 2 from m2.mp4 :
$ ./ffmpeg -i m2.mp4 out2_%d.jpg
ffmpeg version 2.7.2 Copyright (c) 2000-2015 the FFmpeg developers
built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'm2.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Duration: 00:00:00.03, start: 0.000000, bitrate: 824 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 980x100 [SAR 1:1 DAR 49:5], 648 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Output #0, image2, to 'out2_%d.jpg':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 980x100 [SAR 1:1 DAR 49:5], q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.41.100 mjpeg
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
frame= 1 fps=0.0 q=1.6 Lsize=N/A time=00:00:00.03 bitrate=N/A
video:4kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
It seems that frame 2 looks different when combined with frame 1 in a video. One thing I noticed that when dumping frames from m1.mp4 (two frames combined) there is a warning in ffmpeg output :
[swscaler @ 0x7f7f9a000600] deprecated pixel format used, make sure you did set range correctlyAlso two frame images have same dimmensions (980x100) and their format seems to be same :
$ file -b f1.jpg
JPEG image data, JFIF standard 1.01, comment: "CS=ITU601??"
$ file -b f2.jpg
JPEG image data, JFIF standard 1.01So why this is happening ? I am struggling with this issue for quite a long time - for some reason some JPEGs somehow are in different "format ?" than others and make mess in videos...
You can download first two images included in this question and test commands on your own.
$ identify -verbose f1.jpg
Image: f1.jpg
Format: JPEG (Joint Photographic Experts Group JFIF format)
Mime type: image/jpeg
Class: DirectClass
Geometry: 980x100+0+0
Resolution: 552x551
Print size: 1.77536x0.181488
Units: PixelsPerInch
Type: Palette
Endianess: Undefined
Colorspace: sRGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Red:
min: 189 (0.741176)
max: 233 (0.913725)
mean: 208.261 (0.81671)
standard deviation: 14.1741 (0.0555848)
kurtosis: -1.40078
skewness: 0.332664
Green:
min: 189 (0.741176)
max: 233 (0.913725)
mean: 208.261 (0.81671)
standard deviation: 14.1741 (0.0555848)
kurtosis: -1.40078
skewness: 0.332664
Blue:
min: 189 (0.741176)
max: 233 (0.913725)
mean: 208.26 (0.816706)
standard deviation: 14.1756 (0.0555905)
kurtosis: -1.40068
skewness: 0.332424
Image statistics:
Overall:
min: 189 (0.741176)
max: 233 (0.913725)
mean: 208.261 (0.816709)
standard deviation: 14.1746 (0.0555867)
kurtosis: -1.40075
skewness: 0.332584
Colors: 47
Histogram:
368: (189,189,189) #BDBDBD grey74
1984: (190,190,190) #BEBEBE grey
28: (191,191,189) #BFBFBD srgb(191,191,189)
3780: (191,191,191) #BFBFBF grey75
28: (192,192,190) #C0C0BE srgb(192,192,190)
6628: (192,192,192) #C0C0C0 silver
5664: (193,193,193) #C1C1C1 srgb(193,193,193)
4608: (194,194,194) #C2C2C2 grey76
4480: (195,195,195) #C3C3C3 srgb(195,195,195)
3328: (196,196,196) #C4C4C4 grey77
2592: (197,197,197) #C5C5C5 srgb(197,197,197)
3072: (198,198,198) #C6C6C6 srgb(198,198,198)
2272: (199,199,199) #C7C7C7 grey78
2112: (200,200,200) #C8C8C8 srgb(200,200,200)
2112: (201,201,201) #C9C9C9 grey79
1920: (202,202,202) #CACACA srgb(202,202,202)
1728: (203,203,203) #CBCBCB srgb(203,203,203)
1760: (204,204,204) #CCCCCC grey80
1696: (205,205,205) #CDCDCD srgb(205,205,205)
1248: (206,206,206) #CECECE srgb(206,206,206)
1536: (207,207,207) #CFCFCF grey81
1504: (208,208,208) #D0D0D0 srgb(208,208,208)
1344: (209,209,209) #D1D1D1 grey82
1536: (210,210,210) #D2D2D2 srgb(210,210,210)
1472: (211,211,211) #D3D3D3 LightGray
1088: (212,212,212) #D4D4D4 grey83
1472: (213,213,213) #D5D5D5 srgb(213,213,213)
1536: (214,214,214) #D6D6D6 grey84
1344: (215,215,215) #D7D7D7 srgb(215,215,215)
1184: (216,216,216) #D8D8D8 srgb(216,216,216)
1408: (217,217,217) #D9D9D9 grey85
1472: (218,218,218) #DADADA srgb(218,218,218)
1216: (219,219,219) #DBDBDB grey86
1280: (220,220,220) #DCDCDC gainsboro
1536: (221,221,221) #DDDDDD srgb(221,221,221)
1472: (222,222,222) #DEDEDE grey87
1600: (223,223,223) #DFDFDF srgb(223,223,223)
1696: (224,224,224) #E0E0E0 grey88
1792: (225,225,225) #E1E1E1 srgb(225,225,225)
1728: (226,226,226) #E2E2E2 srgb(226,226,226)
1952: (227,227,227) #E3E3E3 grey89
2272: (228,228,228) #E4E4E4 srgb(228,228,228)
2752: (229,229,229) #E5E5E5 grey90
4512: (230,230,230) #E6E6E6 srgb(230,230,230)
4672: (231,231,231) #E7E7E7 srgb(231,231,231)
640: (232,232,232) #E8E8E8 grey91
576: (233,233,233) #E9E9E9 srgb(233,233,233)
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 980x100+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Orientation: Undefined
Properties:
comment: CS=ITU601
date:create: 2015-09-28T21:47:26+02:00
date:modify: 2015-09-28T21:47:26+02:00
jpeg:colorspace: 2
jpeg:quality: 92
jpeg:sampling-factor: 2x2,1x1,1x1
signature: ca599d8ad07c79b36837cb9f4811d83e236b8d4a4cdfada8d60c4aa330f28f38
Artifacts:
filename: f1.jpg
verbose: true
Tainted: False
Filesize: 1.36KB
Number pixels: 98K
Pixels per second: 9.8MB
User time: 0.000u
Elapsed time: 0:01.009
Version: ImageMagick 6.8.7-0 2013-10-28 Q16 http://www.imagemagick.org$ identify -verbose f2.jpg
Image: f2.jpg
Format: JPEG (Joint Photographic Experts Group JFIF format)
Mime type: image/jpeg
Class: DirectClass
Geometry: 980x100+0+0
Resolution: 72x72
Print size: 13.6111x1.38889
Units: PixelsPerInch
Type: Palette
Endianess: Undefined
Colorspace: sRGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Red:
min: 186 (0.729412)
max: 254 (0.996078)
mean: 242.844 (0.952329)
standard deviation: 11.0845 (0.0434688)
kurtosis: 4.24417
skewness: -2.17102
Green:
min: 186 (0.729412)
max: 254 (0.996078)
mean: 242.844 (0.952329)
standard deviation: 11.0845 (0.0434688)
kurtosis: 4.24417
skewness: -2.17102
Blue:
min: 186 (0.729412)
max: 254 (0.996078)
mean: 242.842 (0.952323)
standard deviation: 11.0886 (0.0434848)
kurtosis: 4.24235
skewness: -2.17103
Image statistics:
Overall:
min: 186 (0.729412)
max: 254 (0.996078)
mean: 242.843 (0.952327)
standard deviation: 11.0859 (0.0434741)
kurtosis: 4.24356
skewness: -2.17102
Colors: 91
Histogram:
2: (186,186,186) #BABABA grey73
2: (187,187,187) #BBBBBB srgb(187,187,187)
1: (189,189,189) #BDBDBD grey74
5: (190,190,190) #BEBEBE grey
2: (191,191,191) #BFBFBF grey75
20: (192,192,192) #C0C0C0 silver
28: (193,193,193) #C1C1C1 srgb(193,193,193)
37: (194,194,194) #C2C2C2 grey76
46: (195,195,195) #C3C3C3 srgb(195,195,195)
59: (196,196,196) #C4C4C4 grey77
108: (197,197,197) #C5C5C5 srgb(197,197,197)
134: (198,198,198) #C6C6C6 srgb(198,198,198)
145: (199,199,199) #C7C7C7 grey78
188: (200,200,200) #C8C8C8 srgb(200,200,200)
230: (201,201,201) #C9C9C9 grey79
241: (202,202,202) #CACACA srgb(202,202,202)
236: (203,203,203) #CBCBCB srgb(203,203,203)
252: (204,204,204) #CCCCCC grey80
240: (205,205,205) #CDCDCD srgb(205,205,205)
243: (206,206,206) #CECECE srgb(206,206,206)
1: (207,207,205) #CFCFCD srgb(207,207,205)
250: (207,207,207) #CFCFCF grey81
1: (208,208,206) #D0D0CE srgb(208,208,206)
267: (208,208,208) #D0D0D0 srgb(208,208,208)
2: (209,209,207) #D1D1CF srgb(209,209,207)
226: (209,209,209) #D1D1D1 grey82
3: (210,210,208) #D2D2D0 srgb(210,210,208)
193: (210,210,210) #D2D2D2 srgb(210,210,210)
5: (211,211,209) #D3D3D1 srgb(211,211,209)
215: (211,211,211) #D3D3D3 LightGray
7: (212,212,210) #D4D4D2 srgb(212,212,210)
227: (212,212,212) #D4D4D4 grey83
11: (213,213,211) #D5D5D3 srgb(213,213,211)
250: (213,213,213) #D5D5D5 srgb(213,213,213)
4: (214,214,212) #D6D6D4 srgb(214,214,212)
291: (214,214,214) #D6D6D6 grey84
16: (215,215,213) #D7D7D5 srgb(215,215,213)
307: (215,215,215) #D7D7D7 srgb(215,215,215)
1: (216,216,214) #D8D8D6 srgb(216,216,214)
371: (216,216,216) #D8D8D8 srgb(216,216,216)
4: (217,217,215) #D9D9D7 srgb(217,217,215)
355: (217,217,217) #D9D9D9 grey85
3: (218,218,216) #DADAD8 srgb(218,218,216)
398: (218,218,218) #DADADA srgb(218,218,218)
3: (219,219,217) #DBDBD9 srgb(219,219,217)
404: (219,219,219) #DBDBDB grey86
5: (220,220,218) #DCDCDA srgb(220,220,218)
435: (220,220,220) #DCDCDC gainsboro
1: (221,221,219) #DDDDDB srgb(221,221,219)
489: (221,221,221) #DDDDDD srgb(221,221,221)
2: (222,222,220) #DEDEDC srgb(222,222,220)
569: (222,222,222) #DEDEDE grey87
1: (223,223,221) #DFDFDD srgb(223,223,221)
552: (223,223,223) #DFDFDF srgb(223,223,223)
2: (224,224,222) #E0E0DE srgb(224,224,222)
595: (224,224,224) #E0E0E0 grey88
2: (225,225,223) #E1E1DF srgb(225,225,223)
645: (225,225,225) #E1E1E1 srgb(225,225,225)
736: (226,226,226) #E2E2E2 srgb(226,226,226)
3: (227,227,225) #E3E3E1 srgb(227,227,225)
646: (227,227,227) #E3E3E3 grey89
1: (228,228,226) #E4E4E2 srgb(228,228,226)
707: (228,228,228) #E4E4E4 srgb(228,228,228)
1: (229,229,227) #E5E5E3 srgb(229,229,227)
667: (229,229,229) #E5E5E5 grey90
1: (230,230,228) #E6E6E4 srgb(230,230,228)
759: (230,230,230) #E6E6E6 srgb(230,230,230)
767: (231,231,231) #E7E7E7 srgb(231,231,231)
788: (232,232,232) #E8E8E8 grey91
862: (233,233,233) #E9E9E9 srgb(233,233,233)
880: (234,234,234) #EAEAEA srgb(234,234,234)
889: (235,235,235) #EBEBEB grey92
863: (236,236,236) #ECECEC srgb(236,236,236)
868: (237,237,237) #EDEDED grey93
1032: (238,238,238) #EEEEEE srgb(238,238,238)
878: (239,239,239) #EFEFEF srgb(239,239,239)
1083: (240,240,240) #F0F0F0 grey94
1035: (241,241,241) #F1F1F1 srgb(241,241,241)
1247: (242,242,242) #F2F2F2 grey95
1610: (243,243,243) #F3F3F3 srgb(243,243,243)
2084: (244,244,244) #F4F4F4 srgb(244,244,244)
3473: (245,245,245) #F5F5F5 grey96
6350: (246,246,246) #F6F6F6 srgb(246,246,246)
9152: (247,247,247) #F7F7F7 grey97
14755: (248,248,248) #F8F8F8 srgb(248,248,248)
21183: (249,249,249) #F9F9F9 srgb(249,249,249)
12507: (250,250,250) #FAFAFA grey98
2516: (251,251,251) #FBFBFB srgb(251,251,251)
305: (252,252,252) #FCFCFC grey99
16: (253,253,253) #FDFDFD srgb(253,253,253)
4: (254,254,254) #FEFEFE srgb(254,254,254)
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 980x100+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Orientation: Undefined
Properties:
date:create: 2015-09-28T21:48:30+02:00
date:modify: 2015-09-28T21:48:30+02:00
jpeg:colorspace: 2
jpeg:quality: 92
jpeg:sampling-factor: 2x2,1x1,1x1
signature: f718ab157fae4ff0395eaf07a0165897fd9de558eaed00586530690d39e5ed23
Artifacts:
filename: f2.jpg
verbose: true
Tainted: False
Filesize: 4.32KB
Number pixels: 98K
Pixels per second: 0B
User time: 0.000u
Elapsed time: 0:01.000
Version: ImageMagick 6.8.7-0 2013-10-28 Q16 http://www.imagemagick.org -
Modifying incorrect h.264 dimension in existing video file
11 juin 2015, par RichyJAfter searching a lot, I’m more confused than ever !! To summarise :
I recorded a video using my HTC One M8, using 1920x1088 resolution, and it came out fine. The next day, for some reason, in the settings I changed to 1920x1080 and the next video was weird - green bar across the top, diagonal green lines throughout and odd colour stripes. The underlying image was fine, although there seem to be some ’frame jumps’ at times. Unfortunately, this second video contained a section I would like to keep, so I’m trying to fix it...
I’ve learned a bit about AVC/H.264, but it’s pretty confusing. Essentially, I wonder whether I can just change the ’1080’ in the file info to ’1088’ and salvage the footage - there’s no audio to worry about. I read that since 1080 is not directly divisible by 16, most encoders actually do 1088 then the player discards the remaining 8 lines at playback time. I wonder whether this is the root of the problem ? I tried to get into NALs, SPS/PPS etc, but couldn’t really fathom whether this was even relevant to my problem. A hex search didn’t even find anything that looked like the NALs given as examples elsewhere :
What does this NAL header data mean ?
Fetching dimensions of a video
I’ve loaded both files into a Hex editor and compared as best I can (around the moov and avcC parts), but haven’t fixed it yet. One of the single byte changes I made and saved to a new ’test’ file brought up additional info in the mediainfo program, showing that the original recording was at 1088 - this hadn’t been there before, but it still played wrongly. I found info regarding the encoding of height and width (units-1 * 16) but couldn’t work out how to use this info in practice.
I tried ffmpeg and dumping to raw video, but couldn’t make this play at all as a yuv file.
So, my question is, will I be able to change just one byte (or a few) in the file, to make it read as 1088 to the player, or am I looking in totally the wrong direction ?!? Is this even possible ? As I say, the actual images look intact throughout, just the colours are wrong and the lines are there, so I believe it’s something to do with YCrCb problems, but at this point, I’m lost...
I know this isn’t specifically about programming, but the above links were all from this site, so thought it might be OK to ask here. Any help would be much appreciated !!
I’ve recreated the conditions and done 2 short clips at 1080 and 1088 for you to see the problem but as I’m new, I can’t post them here yet. They’re on my Photobucket page if you are willing to look at them (hope this isn’t breaking the rules !!). The blueish line at the bottom is the windowsill...
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Merge commit ’44f7df0c987965763c609f6dc36974b04182e58d’
23 juillet 2015, par Michael NiedermayerMerge commit ’44f7df0c987965763c609f6dc36974b04182e58d’
* commit ’44f7df0c987965763c609f6dc36974b04182e58d’ :
dds : Write the palette in the native endian formConflicts :
libavcodec/dds.cSee : 36a87c2dc7f302da3778bd0cff050b5c93a730c7
Merged-by : Michael Niedermayer <michael@niedermayer.cc>
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