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FFmpeg function avformat_open_input for USB video device throws exception : No such file or directory
8 juin, par ffvideonerWindows & C# & FFmpeg.AutoGen
I used the ffmpeg-function (from library FFmpeg.AutoGen) to show video from rtsp-stream:
ffmpeg.avformat_open_input(&pFormatContext, "rtsp://127.0.0.1:8554/abc", iformat, null);It works right.
Now I want to use this function for USB video device.
FFmpeg outputs this device name:
ffmpeg -list_devices true -f dshow -i dummy [dshow @ 0000000000163000] "GENERAL WEBCAM" (video)This is how I'm trying to get the video:
string deviceName = "GENERAL WEBCAM";or
string deviceName = "video=GENERAL WEBCAM"; ffmpeg.avformat_open_input(&pFormatContext, deviceName, ffmpeg.av_find_input_format("dshow"), null);For both variants of device names, I get an error:
No such file or directory.But here it works:
ffmpeg -video_size 1280x720 -framerate 30 -f dshow -i video="GENERAL WEBCAM":audio="Microphone (3- GENERAL WEBCAM)" -c:v libx264 -crf 30 -preset ultrafast ffmpegvideo.mp4Why doesn't
avformat_open_inputwork with video device name? -
How to stream from camera to browser using ffmpeg [closed]
7 juin, par Gabriel FurstenheimFFMpeg just merged support for WebRTC.
If I understand correctly, this should allow to stream directly from ffmpeg to a website without the use of a server.
How does this work?
ffmpeg -f dshow -i video=MyCamera ???I guess something similar to
I'm guessing something like
ffmpeg -f dshow -i video=MyCamera -f webrtc udp://localhost:6666Also, how would the website look like?
For simplicity, assume that everything happens in localhost
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FFmpeg/DASH : duration or timestamp out of range for mov/mp4 format [closed]
7 juin, par mikeI'm trying to convert a
aacstream to dash. The issue is that I get a lot of errors as below(though it seems to segment it into multiple files but I get errors on the player too). The question is why do I get these errors and how can I fix it? If I simply convert "copy" it into to a single mp4 file it works without error.ffmpeg -i "a.mkv" -y -map 0:1 -c:0 copy -min_seg_duration 1000000 -use_timeline 1 -use_template 1 -init_seg_name init.mp4s -media_seg_name "\$Number\$.mp4s" -adaptation_sets "id=1,streams=0" -remove_at_exit 0 -f dash -dash 1 "out/stream.mpd" -loglevel errorOutput
[mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 40475608 is out of range for mov/mp4 format [mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 40764376 is out of range for mov/mp4 format [mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 40860664 is out of range for mov/mp4 format [mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 41149432 is out of range for mov/mp4 format [mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 41390056 is out of range for mov/mp4 format [mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 41823208 is out of range for mov/mp4 formatCopy to a single MP4 works just fine ffmpeg -i "a.mkv" -y -map 0:1 -c:0 copy -f mp4 -dash 1 "out/out.mp4" -loglevel error
Probe
ffprobe a.mkv ffprobe version 3.4 Copyright (c) 2007-2017 the FFmpeg developers built with Apple LLVM version 9.0.0 (clang-900.0.37) configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma libavutil 55. 78.100 / 55. 78.100 libavcodec 57.107.100 / 57.107.100 libavformat 57. 83.100 / 57. 83.100 libavdevice 57. 10.100 / 57. 10.100 libavfilter 6.107.100 / 6.107.100 libavresample 3. 7. 0 / 3. 7. 0 libswscale 4. 8.100 / 4. 8.100 libswresample 2. 9.100 / 2. 9.100 libpostproc 54. 7.100 / 54. 7.100 Input #0, matroska,webm, from 'a.mkv': Metadata: encoder : libebml v1.3.1 + libmatroska v1.4.2 creation_time : 2017-03-11T02:56:50.000000Z Duration: 02:12:52.39, start: 0.000000, bitrate: 740 kb/s Chapter #0:0: start 0.000000, end 520.270000 Metadata: title : 00:00:00.000 Chapter #0:1: start 520.270000, end 1135.718000 Metadata: title : 00:08:40.270 Chapter #0:2: start 1135.718000, end 1703.660000 Metadata: title : 00:18:55.718 Chapter #0:3: start 1703.660000, end 2314.187000 Metadata: title : 00:28:23.660 Chapter #0:4: start 2314.187000, end 2888.594000 Metadata: title : 00:38:34.187 Chapter #0:5: start 2888.594000, end 3499.246000 Metadata: title : 00:48:08.594 Chapter #0:6: start 3499.246000, end 4154.692000 Metadata: title : 00:58:19.246 Chapter #0:7: start 4154.692000, end 4646.392000 Metadata: title : 01:09:14.692 Chapter #0:8: start 4646.392000, end 5373.660000 Metadata: title : 01:17:26.392 Chapter #0:9: start 5373.660000, end 5882.085000 Metadata: title : 01:29:33.660 Chapter #0:10: start 5882.085000, end 6627.871000 Metadata: title : 01:38:02.085 Chapter #0:11: start 6627.871000, end 7144.471000 Metadata: title : 01:50:27.871 Chapter #0:12: start 7144.471000, end 7451.944000 Metadata: title : 01:59:04.471 Chapter #0:13: start 7451.944000, end 7972.394000 Metadata: title : 02:04:11.944 Stream #0:0(eng): Video: h264 (High), yuv420p(tv, bt709/unknown/unknown, progressive), 720x300 [SAR 1:1 DAR 12:5], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) Metadata: title : X264 BPS : 623765 BPS-eng : 623765 DURATION : 02:12:52.311000000 DURATION-eng : 02:12:52.311000000 NUMBER_OF_FRAMES: 191144 NUMBER_OF_FRAMES-eng: 191144 NUMBER_OF_BYTES : 621606403 NUMBER_OF_BYTES-eng: 621606403 _STATISTICS_WRITING_APP: mkvmerge v8.3.0 ('Over the Horizon') 64bit _STATISTICS_WRITING_APP-eng: mkvmerge v8.3.0 ('Over the Horizon') 64bit _STATISTICS_WRITING_DATE_UTC: 2017-03-11 02:56:50 _STATISTICS_WRITING_DATE_UTC-eng: 2017-03-11 02:56:50 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:1(eng): Audio: aac (LC), 48000 Hz, stereo, fltp (default) Metadata: BPS : 114797 BPS-eng : 114797 DURATION : 02:12:52.394000000 DURATION-eng : 02:12:52.394000000 NUMBER_OF_FRAMES: 373706 NUMBER_OF_FRAMES-eng: 373706 NUMBER_OF_BYTES : 114401387 NUMBER_OF_BYTES-eng: 114401387 _STATISTICS_WRITING_APP: mkvmerge v8.3.0 ('Over the Horizon') 64bit _STATISTICS_WRITING_APP-eng: mkvmerge v8.3.0 ('Over the Horizon') 64bit _STATISTICS_WRITING_DATE_UTC: 2017-03-11 02:56:50 _STATISTICS_WRITING_DATE_UTC-eng: 2017-03-11 02:56:50 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTESShaka debug
Assertion failed: This should be an update of the last segment in a period shaka.media.SegmentIndex.merge @ segment_index.js:153 shaka.dash.SegmentTemplate.createStream @ segment_template.js:82 shaka.dash.DashParser.parseRepresentation_ @ dash_parser.js:1080 shaka.dash.DashParser.parseAdaptationSet_ @ dash_parser.js:978 shaka.dash.DashParser.parsePeriod_ @ dash_parser.js:722 shaka.dash.DashParser.parsePeriods_ @ dash_parser.js:626 shaka.dash.DashParser.processManifest_ @ dash_parser.js:520 (anonymous) @ dash_parser.js:431 Promise resolved (async) shaka.dash.DashParser.parseManifest_ @ dash_parser.js:430 (anonymous) @ dash_parser.js:397 Promise resolved (async) shaka.dash.DashParser.requestManifest_ @ dash_parser.js:390 shaka.dash.DashParser.onUpdate_ @ dash_parser.js:1161 setTimeout (async) shaka.dash.DashParser.setUpdateTimer_ @ dash_parser.js:1209 (anonymous) @ dash_parser.js:331 Promise resolved (async) shaka.dash.DashParser.start @ dash_parser.js:329 (anonymous) @ player.js:555 Promise resolved (async) shaka.util.CancelableChain.then @ cancelable_chain.js:72 shaka.Player.load @ player.js:499 initPlayer @ ?x=149&y=88&q=http%3A%2F%2Flocalhost%3A8080%2Fmeta%2F%3FbucketID%3D%2FVolumes%2FTV%2FFa%26channelID%3D%2FVolumes%2FTV%26containerID%3D%2FUsers%2F%2Fbrev%%2FL1ZvbHVtZXMvVFYvRmFudGFzdGljLkJlYXN0cy5hbmQuV2hlcmUudG8uRmluZC5UaGVtLjIwMTYuQkRSaXAueDI2NC1TUEFSS1MvYS5ta3Y%2F97M4TS6IqnQ.mpd:392 463segment_index.js:145 Refusing to rewrite original references on update! shaka.media.SegmentIndex.merge @ segment_index.js:145 shaka.dash.SegmentTemplate.createStream @ segment_template.js:82 shaka.dash.DashParser.parseRepresentation_ @ dash_parser.js:1080 shaka.dash.DashParser.parseAdaptationSet_ @ dash_parser.js:978 shaka.dash.DashParser.parsePeriod_ @ dash_parser.js:722 shaka.dash.DashParser.parsePeriods_ @ dash_parser.js:626 shaka.dash.DashParser.processManifest_ @ dash_parser.js:520 (anonymous) @ dash_parser.js:431 Promise resolved (async) shaka.dash.DashParser.parseManifest_ @ dash_parser.js:430 (anonymous) @ dash_parser.js:397 Promise resolved (async) shaka.dash.DashParser.requestManifest_ @ dash_parser.js:390 shaka.dash.DashParser.onUpdate_ @ dash_parser.js:1161 setTimeout (async) shaka.dash.DashParser.setUpdateTimer_ @ dash_parser.js:1209 (anonymous) @ dash_parser.js:331 Promise resolved (async) shaka.dash.DashParser.start @ dash_parser.js:329 (anonymous) @ player.js:555 Promise resolved (async) shaka.util.CancelableChain.then @ cancelable_chain.js:72 shaka.Player.load @ player.js:499 initPlayer @ ?x=149&y=88&q=http%3A%2F%2Flocalhost%3A8080%2Fmeta%2F%3FbucketID%3D%2FVolumes%2FTV%2FFa%26channelID%3D%2FVolumes%2FTV%26containerID%3D%2FUsers%2F%2Fbrev%%2FL1ZvbHVtZXMvVFYvRmFudGFzdGljLkJlYXN0cy5hbmQuV2hlcmUudG8uRmluZC5UaGVtLjIwMTYuQkRSaXAueDI2NC1TUEFSS1MvYS5ta3Y%2F97M4TS6IqnQ.mpd:392 -
How to install pytorch and opencv using a fixed conda channel order ?
7 juin, par progquesterConda creates a pristine environment, configures a fixed channel order, and then starts installing pytorch torchvisioni pytorch-cuda and opencv, and it prompts for dependency conflicts. Do I have to install opencv via pip?
The same thing happens with python 3.10
$ conda create -n my_env3.9 python=3.9 $ conda activate my_env3.9 $ conda install pytorch torchvision pytorch-cuda=11.8 opencv Channels: - pytorch - nvidia - conda-forge - defaults Platform: linux-64 Collecting package metadata (repodata.json): done Solving environment: failed LibMambaUnsatisfiableError: Encountered problems while solving: - nothing provides libopencv 4.2.0 py36_5 needed by opencv-4.2.0-py36_5 Could not solve for environment specs The following packages are incompatible ├─ opencv =* * is installable with the potential options │ ├─ opencv [4.10.0|4.11.0] would require │ │ └─ libopencv [==4.10.0 headless_py310h05fcec3_10|==4.10.0 headless_py310h2251c23_11|...|==4.11.0 qt6_py39hd96f159_602], which requires │ │ └─ ffmpeg >=7.1.0,<8.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv [4.10.0|4.9.0] would require │ │ └─ libopencv [==4.10.0 headless_py310h3d4b477_1|==4.10.0 headless_py310hef7d0a5_0|...|==4.9.0 qt6_py39hed63795_614], which requires │ │ └─ ffmpeg >=6.1.1,<7.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 4.10.0 would require │ │ └─ libopencv [==4.10.0 headless_py310h8d94708_2|==4.10.0 headless_py38h5642e36_2|...|==4.10.0 qt6_py39hfd9fb6d_602], which requires │ │ └─ ffmpeg >=7.0.1,<8.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 4.10.0 would require │ │ └─ libopencv [==4.10.0 headless_py310h5bfabb9_4|==4.10.0 headless_py310h5bfabb9_5|...|==4.10.0 qt6_py39hdeb11db_605], which requires │ │ └─ ffmpeg >=6.1.2,<7.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 4.10.0 would require │ │ └─ libopencv [==4.10.0 headless_py311h63eac36_5|==4.10.0 headless_py311h63eac36_6|...|==4.10.0 qt6_py39h5d2977a_603], which requires │ │ └─ ffmpeg >=7.0.2,<8.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 4.11.0 would require │ │ └─ libopencv [==4.11.0 headless_py310h8ace835_4|==4.11.0 headless_py310h8ace835_5|...|==4.11.0 qt6_py39hbfaaa73_603], which requires │ │ └─ ffmpeg >=7.1.1,<8.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv [4.5.3|4.5.5|4.6.0] would require │ │ └─ libopencv [==4.5.3 py310hc72b5f5_8|==4.5.3 py38hc6b509d_8|...|==4.6.0 py39hf4bb9d8_2], which requires │ │ └─ ffmpeg >=4.4.2,<5.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv [4.6.0|4.7.0] would require │ │ └─ libopencv [==4.6.0 py310h5bd1119_9|==4.6.0 py310h6214075_5|...|==4.7.0 py39hf99ad11_5], which requires │ │ └─ ffmpeg >=5.1.2,<6.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv [4.7.0|4.8.0|4.8.1] would require │ │ └─ libopencv [==4.7.0 py310h245f934_4|==4.7.0 py310h3e876cf_5|...|==4.8.1 py39hf605482_5], which requires │ │ └─ ffmpeg >=6.0.0,<7.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 4.9.0 would require │ │ └─ libopencv [==4.9.0 headless_py310hae237af_14|==4.9.0 headless_py38h0f7b093_14|...|==4.9.0 qt6_py39h067c833_615], which requires │ │ └─ ffmpeg >=7.0.0,<8.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv [2.4.12|2.4.13|3.1.0|3.2.0] would require │ │ └─ python =2.7 *, which can be installed; │ ├─ opencv [2.4.13.4|3.2.0|3.3.0|3.4.1] would require │ │ └─ ffmpeg >=3.2.3,<3.2.6 *, which conflicts with any installable versions previously reported; │ ├─ opencv 3.1.0 would require │ │ └─ python =3.4 *, which can be installed; │ ├─ opencv [3.1.0|3.2.0] would require │ │ └─ python =3.5 *, which can be installed; │ ├─ opencv [3.1.0|3.2.0] would require │ │ └─ python =3.6 *, which can be installed; │ ├─ opencv [3.4.1|3.4.3|3.4.4|3.4.7] would require │ │ ├─ ffmpeg >=4.0.2,<4.1.0a0 *, which conflicts with any installable versions previously reported; │ │ └─ libopencv ==3.4.7 hc173e35_5, which requires │ │ └─ ffmpeg >=4.0.2,<4.1.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 3.4.1 would require │ │ └─ ffmpeg >=4.0.1,<4.1.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv [3.4.4|3.4.7|...|4.1.1] would require │ │ ├─ ffmpeg =4.1 *, which conflicts with any installable versions previously reported; │ │ └─ libopencv [==3.4.7 h0cc45ee_4|==4.1.1 h0cc45ee_3], which requires │ │ └─ ffmpeg =4.1 *, which conflicts with any installable versions previously reported; │ ├─ opencv [3.4.7|3.4.8|...|4.2.0] would require │ │ └─ libopencv [==3.4.7 h32d60f7_6|==3.4.7 py27_7|...|==4.2.0 py38_4], which requires │ │ └─ ffmpeg >=4.1.3,<4.2.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 4.2.0 would require │ │ └─ libopencv ==4.2.0 py36_5, which does not exist (perhaps a missing channel); │ ├─ opencv [4.2.0|4.3.0|4.4.0] would require │ │ └─ py-opencv [==4.2.0 py36h0b673f9_6|==4.3.0 py36h0b673f9_2|==4.4.0 py36h0b673f9_2], which requires │ │ └─ python >=3.6,<3.7.0a0 *, which can be installed; │ ├─ opencv [4.2.0|4.3.0] would require │ │ └─ libopencv [==4.2.0 py36_7|==4.2.0 py37_7|...|==4.3.0 py38_1], which requires │ │ └─ ffmpeg >=4.2.3,<4.3.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv [4.2.0|4.3.0|4.4.0] would require │ │ └─ py-opencv [==4.2.0 py37h43977f1_5|==4.2.0 py37h43977f1_6|==4.3.0 py37h43977f1_2|==4.4.0 py37h43977f1_2], which requires │ │ └─ python >=3.7,<3.8.0a0 *, which can be installed; │ ├─ opencv [4.2.0|4.3.0|4.4.0] would require │ │ └─ py-opencv [==4.2.0 py38h23f93f0_5|==4.2.0 py38h23f93f0_6|==4.3.0 py38h23f93f0_2|==4.4.0 py38h23f93f0_2], which requires │ │ └─ python >=3.8,<3.9.0a0 *, which can be installed; │ ├─ opencv [4.4.0|4.5.0|4.5.1|4.5.2] would require │ │ └─ libopencv [==4.4.0 py36_3|==4.4.0 py37_3|...|==4.5.2 py39h70bf20d_1], which requires │ │ └─ ffmpeg >=4.3.1,<4.4.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 4.5.0 would require │ │ └─ libopencv ==4.5.0 py36_5, which does not exist (perhaps a missing channel); │ ├─ opencv 4.5.0 would require │ │ └─ libopencv ==4.5.0 py36_6, which does not exist (perhaps a missing channel); │ ├─ opencv [4.5.3|4.5.5] would require │ │ └─ libopencv [==4.5.3 py31hbd5a65a_6|==4.5.3 py31he7a5e20_7|...|==4.5.5 py39hfb30bf4_6], which requires │ │ └─ ffmpeg >=4.3.2,<4.4.0a0 *, which conflicts with any installable versions previously reported; │ ├─ opencv 4.5.5 would require │ │ └─ libopencv [==4.5.5 py310h1897127_9|==4.5.5 py310hc83fb77_10|...|==4.5.5 py39he64e9e9_10], which requires │ │ └─ ffmpeg >=4.4.1,<5.0a0 *, which conflicts with any installable versions previously reported; │ └─ opencv [3.3.1|3.4.1|...|4.6.0] conflicts with any installable versions previously reported; └─ pin on python 3.9.* =* * is not installable because it requires └─ python =3.9 *, which conflicts with any installable versions previously reported. Pins seem to be involved in the conflict. Currently pinned specs: - python=3.9 -
How to solve javacv ExceptionInInitializerError [closed]
6 juin, par shihui weiI want to combine multiple images into a gif. I chose ffmpeg. I learned that there are binary dependencies including ffmpeg in java, so I chose javacv
First, I added the dependency of javacv to my pom file：
org.bytedeco javacv-platform 1.5.11 Then I wrote a code to synthesize GIF from multiple images.
public static byte[] encodeGif(Listframes, int frameDelayMs, boolean loopForever) { if (frames == null || frames.isEmpty()) { throw new IllegalArgumentException("frames 不能为空"); } int width = frames.get(0).getWidth(); int height = frames.get(0).getHeight(); // ByteArrayOutputStream + FFmpegFrameRecorder try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) { try (FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(baos, width, height)) { recorder.setFormat("gif"); recorder.setFrameRate(1000.0 / frameDelayMs); recorder.setOption("loop", loopForever ? "0" : "1"); recorder.start(); Java2DFrameConverter converter = new Java2DFrameConverter(); for (BufferedImage img : frames) { // 把 BufferedImage 转成 Frame Frame frame = converter.convert(img); recorder.record(frame); } recorder.stop(); } return baos.toByteArray(); } catch (Exception e) { log.error("FastGifUtil.encodeGif 失败", e); throw new RuntimeException("生成 GIF 失败", e); } } Finally, I have prepared data to test, Below is my test code：
public void testGenerateGif() { log.info(">>>>>>>>>>> start get bufferedImage <<<<<<<<<<<<"); ListbufferedImages = batchTaskUtils.batchIOTask(urls, url -> { byte[] byteData = imageClientUtils.byteData(url); return OpencvUtils.byteToBufferedImage(byteData); }); log.info(">>>>>>>>>>> start generate gif <<<<<<<<<<<<"); long time = System.currentTimeMillis(); byte[] bytes = GifUtils.encodeGif(bufferedImages, 50, true); log.info("{}", System.currentTimeMillis() - time); log.info(">>>>>>>>>>> start upload gif <<<<<<<<<<<<"); String upload = upload(bytes); log.info("{}", upload); } However, I encountered a difficult problem: I cannot load the FFmpegFrameRecorder class. The exception error is:
java.lang.ExceptionInInitializerError at org.bytedeco.javacv.FFmpegFrameRecorder.(FFmpegFrameRecorder.java:356) at com.kuaishou.qa.utils.GifUtils.encodeGif(GifUtils.java:29) at com.kuaishou.qa.AnimationDiffTest.testGenerateGif(AnimationDiffTest.java:88) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
