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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 -
ffmpeg run from shell runs properly, but does not when called from within .NET
2 juillet 2013, par BevinI'm attempting to use ffmpeg (compiled on Windows with Cygwin) in a C# program, by using the
Processclass to spawn an ffmpeg instance. However, I've hit a rather odd bug that doesn't make much sense.When I run ffmpeg directly from a shell (be it Cygwin's bash, PowerShell, cmd), ffmpeg can properly decode and reencode files without any issues :
PS C:\audio> ffmpeg -i .\sound1.wav -acodec libvorbis -f ogg abc.ogg
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Apr 8 2013 15:10:40 with gcc 4.5.3 (GCC)
configuration: --disable-encoder=vorbis --enable-libvorbis
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
[wav @ 0x800538a0] max_analyze_duration 5000000 reached at 5015510 microseconds
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from '.\sound1.wav':
Metadata:
encoder : Lavf54.63.104
Duration: 00:00:05.76, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
Output #0, ogg, to 'abc.ogg':
Metadata:
encoder : Lavf54.63.104
Stream #0:0: Audio: vorbis, 44100 Hz, stereo, fltp
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> libvorbis)
Press [q] to stop, [?] for help
size= 55kB time=00:00:05.74 bitrate= 78.5kbits/s
video:0kB audio:51kB subtitle:0 global headers:4kB muxing overhead 0.817473%The file plays fine, and I can encode to WAV or any other format I like. However, when I call ffmpeg from C# with the following code :
string tempfile = Path.GetTempFileName();
FileStream tempfilestr = File.OpenWrite(tempfile);
input.CopyTo(tempfilestr);
ProcessStartInfo pstart = new ProcessStartInfo("ffmpeg", string.Format("-i \"{0}\" -v verbose -y -f wav -", tempfile));
pstart.CreateNoWindow = true;
pstart.ErrorDialog = false;
pstart.RedirectStandardOutput = true;
pstart.RedirectStandardError = true;
pstart.UseShellExecute = false;
Process proc = new Process();
proc.StartInfo = pstart;
proc.Start();
StreamReader stdout = proc.StandardOutput;
StreamReader stderr = proc.StandardError;
outtempfilestr = File.OpenRead(outtempfile);
MemoryStream output = new MemoryStream();
stdout.BaseStream.CopyTo(output);
try {
proc.Kill();
}
catch(InvalidOperationException) { }
catch(Win32Exception) { }
File.Delete(tempfile);
return output.ToArray();This randomly produces errors in the output :
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Apr 8 2013 15:10:40 with gcc 4.5.3 (GCC)
configuration: --disable-encoder=vorbis --enable-libvorbis
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
[wav @ 0x80053860] parser not found for codec pcm_s16le, packets or times may be invalid.
Last message repeated 1 times
[wav @ 0x80053860] max_analyze_duration 5000000 reached at 5015510 microseconds
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'C:\Users\Bevin\AppData\Local\Temp\tmp1CCE.tmp':
Duration: 00:00:05.20, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
[graph 0 input from stream 0:0 @ 0x8011f320] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
Output #0, wav, to 'pipe:':
Metadata:
ISFT : Lavf54.63.104
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> pcm_s16le)
Press [q] to stop, [?] for help
Multiple frames in a packet from stream 0
[pcm_s16le @ 0x8005c160] Invalid PCM packet, data has size 3 but at least a size of 4 was expected
Error while decoding stream #0:0: Invalid data found when processing input
No more output streams to write to, finishing.
size= 896kB time=00:00:05.20 bitrate=1411.3kbits/s
video:0kB audio:896kB subtitle:0 global headers:0kB muxing overhead 0.008719%Note that these errors don't always occur. Sometimes they happen for certain files, sometimes they don't. I've tried various combinations of stream redirects and temp files, none of them work. I've also verified the integrity of the temp files, and it all checks out. I've even extracted the temp file before it was deleted, and decoded it in shell without a hitch.
Any ideas ?
Edit : I've tried running ffmpeg from a shell script that's run through C#. It gives the same issues. Compiling ffmpeg via MinGW gives the same issue as well.
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Damaged h264 stream not working with ffmpeg but working with vlc or mplayer
15 avril 2013, par gregoiregentilI have a h264 file, coming from an rtsp stream, that is slightly damaged. Some frames are altered.
ffmpeg reports :
ffmpeg -i stream.mpg
ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
built on Apr 2 2013 17:00:59 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 90000.00 (180000/2)
Input #0, mpegts, from 'a.mpg':
Duration: 00:03:18.84, start: 93370.745522, bitrate: 2121 kb/s
Program 1
Stream #0.0[0x44](): Video: h264 (Baseline), yuv420p, 640x480, 90k tbr, 90k tbn, 180k tbc
At least one output file must be specifiedI can play the file with VLC or mplayer. Obviously, the damaged frames are "kind of blurred" but it's working. mplayer reports :
mplayer stream.mpg
MPlayer2 UNKNOWN (C) 2000-2011 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing stream.mpg.
Detected file format: MPEG-2 transport stream format (libavformat)
[lavf] stream 0: video (h264), -vid 0
LAVF: Program 1
VIDEO: [H264] 640x480 0bpp 90000.000 fps 0.0 kbps ( 0.0 kbyte/s)
Load subtitles in .
[ass] auto-open
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Asking decoder to use 2 threads if supported.
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
Audio: no sound
Starting playback...
V: 0.0 0/ 0 ??% ??% ??,?% 0 0
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 640x480 => 640x480 Planar YV12
V:93370.7 0/ 0 ??% ??% ??,?% 0 0
No pts value from demuxer to use for frame!
Video pts after filters MISSING
V:93370.7 0/ 0 ??% ??% ??,?% 0 0
No pts value from demuxer to use for frame!
Video pts after filters MISSING
V:93370.7 0/ 0 ??% ??% ??,?% 0 0
No pts value from demuxer to use for frame!
Video pts after filters MISSING
V:93370.7 0/ 0 ??% ??% ??,?% 0 0
No pts value from demuxer to use for frame!
Video pts after filters MISSING
V:93370.7 0/ 0 ??% ??% ??,?% 0 0
No pts value from demuxer to use for frame!
Video pts after filters MISSING
V:93370.7 0/ 0 ??% ??% ??,?% 0 0
No pts value from demuxer to use for frame!
Video pts after filters MISSING
V:93370.7 0/ 0 ??% ??% ??,?% 0 0
No pts value from demuxer to use for frame!When I try to re-encode the file with :
ffmpeg -i stream.mpg -fflags +genpts -an -vcodec mpeg4 -r 65535/2733 stream.mp4ffmpeg seems to jump over the altered frames. The length of stream.mp4 << length of stream.mpg
How could I fix this problem, i.e. having ffmpeg to output something similar to what mplayer and vlc output ?
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