Following is my bat file:
#echo off
mediainfo --Inform=file://template.txt "in.mp4" >info.txt
Following is my template.txt
General;File is: %FileName%\r\n
Video;\r\nFormat: %Format%\r\nCodecID: %CodecID%\r\nResolution: %Width%x%Height%\r\nDAR: %DisplayAspectRatio/String% or %DisplayAspectRatio%\r\nPAR: %PixelAspectRatio%\r\nFrameMode: %FrameRate_Mode%\r\nVideoBitrateMode: %BitRate_Mode%\r\nScanType: %ScanType%
Audio;\r\nAudioCodec: %Format%\r\nAudioBitrateMode: %BitRate_Mode%
Following is the output (in info.txt)
File is: in
Format: AVC
CodecID: avc1
Resolution: 1280x720
DAR: 16:9 or 1.778
PAR: 1.000
FrameMode: VFR
VideoBitrateMode:
ScanType: Progressive
AudioCodec: AAC
AudioBitrateMode: VBR
No matter what I do I can't get MediaInfo to give BitRate_Mode for any given file?
Following is the CLI help document for mediainfo:
Help doc
I did exhaustive tests and I have found that most of the time mediainfo doesn't return the %BitRate_Mode% on video tracks, but it does return the %BitRate_Maximum% and if you compare it to the %BitRate% and it is different, it is a VBR video, here is my template:
General;Name.........: %FileName%.%FileExtension%\r\nSize.........: %FileSize/String%\r\nDuration.....: %Duration/String3%\r\n
Video;Resolution...: %Width%x%Height%\r\nCodec........: %Codec/String% %Format_Profile%\r\nBitrate......: %BitRate/String%\r\nMax Bitrate..: %BitRate_Maximum/String%\r\nFramerate....: %FrameRate% fps\r\nAspect Ratio.: %DisplayAspectRatio/String%\r\n
Audio;Audio........: %Language/String% %BitRate/String% %BitRate_Mode% %Channel(s)% chnls %Codec/String%\r\n
Text;%Language/String%
Text_Begin;Subs.........:
Text_Middle;,
Text_End;.\r\n
It will retirn something like this:
Name.........: My Video.m4v
Size.........: 8.23 GiB
Duration.....: 02:20:02.880
Resolution...: 1920x800
Codec........: AVC High#L3.0
Bitrate......: 7 504 Kbps
Max Bitrate..: 27.1 Mbps
Framerate....: 23.976 fps
Aspect Ratio.: 2.40:1
Audio........: English 448 Kbps CBR 6 chnls AC3
Audio........: Spanish 448 Kbps CBR 6 chnls AC3
Subs.........: English, Spanish.
Related
I am trying to configure a pinmux on the BBAI to use the UART from the PRU's. I am running Debian buster with 4.14.108-ti-r131 kernel.
This is part of my device tree overlay:
&cape_pins_default {
pinctrl-single,pins = <
DRA7XX_CORE_IOPAD( 0x3614, PIN_OUTPUT | MUX_MODE10 ) // P8.31a PRU1 TX
DRA7XX_CORE_IOPAD( 0x3610, PIN_INPUT | MUX_MODE10 ) // P8.33a PRU1 RX
DRA7XX_CORE_IOPAD( 0x35E4, PIN_INPUT | MUX_MODE10 ) // P8.43 PRU0 UART RX
DRA7XX_CORE_IOPAD( 0x35E8, PIN_OUTPUT | MUX_MODE10 ) // P8.44 PRU0 UART TX
>;
};
In BBBlack you need to disable HDMI or EMMC for some PRU pins, I tried it like so in /boot/uEnv.txt:
disable_uboot_overlay_video=1
disable_uboot_overlay_emmc=1
Is this also valid on the BBAI? The show-pins script after fiddling and rebooting for quite a while now still states MUX_MODE0 and some vout... function (I assume this is some HDMI thing?)
P8.31a 133 C8 0 slow vout1_d14
P8.33a 132 C6 0 slow vout1_d1
P8.43 121 F10 0 slow vout1_d2
P8.44 122 G11 0 slow vout1_d3
Is there anything more I need to setup or that I missed?
Thanks in advance!
I found out, that after reinstalling the BBAI image, that on the clean image, HDMI was disabled.
For making the device-tree overlay I used the am5729-beagleboneai.dts and defined a custom dtb= in /boot/uEnv.txt as a base, which was the problem, because it enabled HDMI.
Extending the default overlay - which is am572x-bone-common-univ.dtsi - or by loading a pru overlay in the uEnv.txt file did the trick for me. There are plenty of examples for pru overlays for the BBAI in the beagleboards repo linked above, so I went with that.
uname_r=4.19.94-ti-r68
#dtb=
enable_uboot_overlays=1
uboot_overlay_pru=src/arm/overlays/BBAI-PR1_UART0.dtb
Some time caption comes at top of the screen and some time at the bottom, and when we decode the file using some decoder, it will not return styling CSS, on the file?
SCC is not an encoded format, its indifferent format, we can't ready by decoding. It's required programming to convert to a readable format, So we can say that its specific to different users.
Even if u decode using some decoder you maybe not get the expected result.
The format of the SCC file is usually :
03:00:00;12 942c 9429 94d0 9723 c461 6ee9 e5ec 2054 e967 e5f2 ba20 c8e9 2c20 cee5 e967 6862 eff2 a180 9470 9723 54ef 6461 7920 73ef 6de5 f468 e96e 6720 54e9 67e5 f2f4 6173 f4e9 e380
03:00:05;27 9420 94ae 9152 97a1 e973 2068 6170 70e5 6ee9 6e67 2061 f420 73e3 68ef efec a180 91f2 97a1 49f4 a773 20f4 68e5 20d3 70f2 e96e 6720 d3e9 6e67 a180 942f
Use Case
When a user records an audio file and uploads to firebase storage, run a trigger that crops a clip of that file and saves it to a "preview" directory.
Problem
When the file arrives on the server, it is just dead air before the start time (10 seconds) and then doesn't stop after the duration of 10 seconds is exceeded. Whatever I put in the "-t" and "-ss" arguments seems to have no impact on the output file - not cropping correctly.
Environment
mac client / firebase storage
node v8.1.0
ffmpeg v3.2.2
fluent-ffmpeg v2.1.2
Node Code
var command = new ffmpeg({ source: tempFilePath, timeout: 0 })
.setFfmpegPath(ffmpegPath)
.setFfprobePath(ffprobePath)
.inputOption('-t', '10')
.inputOption('-ss', '10')
.outputOption('-acodec', 'copy')
.on('start', function(commandLine) {
console.log('Spawned Ffmpeg with command: ', commandLine);
})
.on('end', function() {
console.log('Preview file cropping done successfully');
})
.on('error', function(err, stdout, stderr) {
var build = err;
if (!stdout === '') { build = build + '\n' + stdout; }
build = build + '\n' + stderr;
console.log(build);
}).save(tempFilePath);
Ffmpeg Command
Spawned Ffmpeg with command: ffmpeg -t 10 -i
/tmp/2EB100B0-6C1E-4D51-9087-764CA653AFC720170711232034.aac -y -acodec
aac /tmp/2EB100B0-6C1E-4D51-9087-764CA653AFC720170711232034.aac
Console Output
$ ffmpeg -t 10 -i E506FE2E-DC81-4DD8-B751-211F7FD9A25820170816160502.aac -y -acodec aac output.aac -loglevel debug
ffmpeg version 3.2.2 Copyright (c) 2000-2016 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 55. 34.100 / 55. 34.100
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.100 / 57. 56.100
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
Splitting the commandline.
Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '10'.
Reading option '-i' ... matched as input url with argument 'E506FE2E-DC81-4DD8-B751-211F7FD9A25820170816160502.aac'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'aac'.
Reading option 'output.aac' ... matched as output url.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url E506FE2E-DC81-4DD8-B751-211F7FD9A25820170816160502.aac.
Applying option t (record or transcode "duration" seconds of audio/video) with argument 10.
Successfully parsed a group of options.
Opening an input file: E506FE2E-DC81-4DD8-B751-211F7FD9A25820170816160502.aac.
[file # 0x7fe42f700420] Setting default whitelist 'file,crypto'
[aac # 0x7fe431000000] Format aac probed with size=2048 and score=51
[aac # 0x7fe431000000] Before avformat_find_stream_info() pos: 0 bytes read:32928 seeks:4 nb_streams:1
[aac # 0x7fe431000000] All info found
[aac # 0x7fe431000000] Estimating duration from bitrate, this may be inaccurate
[aac # 0x7fe431000000] After avformat_find_stream_info() pos: 37888 bytes read:98464 seeks:4 frames:50
Input #0, aac, from 'E506FE2E-DC81-4DD8-B751-211F7FD9A25820170816160502.aac':
Duration: 00:01:24.28, bitrate: 335 kb/s
Stream #0:0, 50, 1/28224000: Audio: aac (LC), 44100 Hz, stereo, fltp, 335 kb/s
Successfully opened the file.
Parsing a group of options: output url output.aac.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument aac.
Successfully parsed a group of options.
Opening an output file: output.aac.
[file # 0x7fe42f7016e0] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 4 logical cores
[graph 0 input from stream 0:0 # 0x7fe42f701880] Setting 'time_base' to value '1/44100'
[graph 0 input from stream 0:0 # 0x7fe42f701880] Setting 'sample_rate' to value '44100'
[graph 0 input from stream 0:0 # 0x7fe42f701880] Setting 'sample_fmt' to value 'fltp'
[graph 0 input from stream 0:0 # 0x7fe42f701880] Setting 'channel_layout' to value '0x3'
[graph 0 input from stream 0:0 # 0x7fe42f701880] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x3
[audio format for output stream 0:0 # 0x7fe42f702060] Setting 'sample_fmts' to value 'fltp'
[audio format for output stream 0:0 # 0x7fe42f702060] Setting 'sample_rates' to value '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
[AVFilterGraph # 0x7fe42f6101a0] query_formats: 5 queried, 12 merged, 0 already done, 0 delayed
Output #0, adts, to 'output.aac':
Metadata:
encoder : Lavf57.56.100
Stream #0:0, 0, 1/44100: Audio: aac (LC), 44100 Hz, stereo, fltp, delay 1024, 128 kb/s
Metadata:
encoder : Lavc57.64.101 aac
Stream mapping:
Stream #0:0 -> #0:0 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
Last message repeated 1 times
[output stream 0:0 # 0x7fe42f701ee0] EOF on sink link output stream 0:0:default.
No more output streams to write to, finishing.
[aac # 0x7fe431001200] Trying to remove 344 more samples than there are in the queue
size= 160kB time=00:00:10.00 bitrate= 130.9kbits/s speed=20.2x
video:0kB audio:157kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.881580%
Input file #0 (E506FE2E-DC81-4DD8-B751-211F7FD9A25820170816160502.aac):
Input stream #0:0 (audio): 432 packets read (398208 bytes); 432 frames decoded (442368 samples);
Total: 432 packets (398208 bytes) demuxed
Output file #0 (output.aac):
Output stream #0:0 (audio): 431 frames encoded (441000 samples); 432 packets muxed (160716 bytes);
Total: 432 packets (160716 bytes) muxed
432 frames successfully decoded, 0 decoding errors
[AVIOContext # 0x7fe42f611040] Statistics: 0 seeks, 432 writeouts
[aac # 0x7fe431001200] Qavg: 4508.253
[AVIOContext # 0x7fe42f7004c0] Statistics: 458912 bytes read, 4 seeks
I have a file which i've encrypted in CENC, and i'm trying to now decrypt it using mp4decrypt from the bento4 mp4decrypt tools. The file consists of a single h264 track in an mp4 file. This is the output of mp4info --verbose
File:
major brand: dash
minor version: 0
compatible brand: iso6
compatible brand: dash
Movie:
duration: 0 ms
time scale: 120000
fragments: yes
Found 1 Tracks
Track 1:
flags: 7 ENABLED IN-MOVIE IN-PREVIEW
id: 1
type: Video
duration: 0 ms
language: und
media:
sample count: 0
timescale: 120000
duration: 0 (media timescale units)
duration: 0 (ms)
bitrate (computed): 6386.097 Kbps
display width: 1920.000000
display height: 817.021271
Sample Description 0
[ENCRYPTED]
Coding: encv
Scheme Type: cenc
Scheme Version: 65536
Scheme URI:
Protection System Details:
[schi] size=8+32
[tenc] size=12+20
default_AlgorithmID = 1
default_IV_size = 8
default_KID = [23 b6 70 1b e9 8b 4e ea 80 4e 9b 59 6c 59 37 a5]
Bytes: 0000000000000001000000000000000000000000000000000780033000480000004800000000000000010a41564320436f64696e670000000000000000000000000000000000000000000018ffff000000476176634301640028ffe1002e67640028acc8501e019effc0c7c0c81a808080a000007d200017701c00000301c9c380000773595359803c60c65801000668e938233c8f
Coding: avc1 (H.264)
Width: 1920
Height: 816
Depth: 24
AVC Profile: 100 (High)
AVC Profile Compat: 0
AVC Level: 40
AVC NALU Length Size: 4
AVC SPS: [67640028acc8501e019effc0c7c0c81a808080a000007d200017701c00000301c9c380000773595359803c60c658]
AVC PPS: [68e938233c8f]
Codecs String: avc1.640028
So to decrypt it using the above key, surely I would do:
mp4decrypt --key 1:23b6701be98b4eea804e9b596c5937a5 --show-progress input.mp4 output.mp4
MP4 Decrypter - Version 1.4
(Bento4 Version 1.5.0.0)
(c) 2002-2015 Axiomatic Systems, LLC
usage: mp4decrypt [options] <input> <output>
Options are:
--show-progress : show progress details
--key <id>:<k>
<id> is either a track ID in decimal or a 128-bit KID in hex,
<k> is a 128-bit key in hex
(several --key options can be used, one for each track or KID)
note: for dcf files, use 1 as the track index
note: for Marlin IPMP/ACGK, use 0 as the track ID
note: KIDs are only applicable to some encryption methods like MPEG-CENC
--fragments-info <filename>
Decrypt the fragments read from <input>, with track info read
from <filename>.
All I get is zero output on the command-line, and the output file is still unplayable.
Any ideas? the video track is for the whole file, it's not split into segments itself.
You are trying to decipher the file with the Key ID instead of the Key itself. "23 b6 70 1b e9 8b 4e ea 80 4e 9b 59 6c 59 37 a5" is the identifier of the key, not the key itself. Sure you will not decipher. It is in the file in order for the DRM system to retrieve the key (sending or searching the keyID for getting the Key itself in return).
Try to use the key value to decipher.
Your mp4encrypt command should have been used with an option like:
--key 1::0000000000000000
as your IV size is 8
Hi
I am running a bi-di 'iperf' test on an interface using my driver.
Steps to repro would be to run bi-di I/O on one interface(other interface is not active):
Run iperf -c -P 8 -t 100000 -I 10 on DUT
iperf -c with same params as above from peer almost immediately ( after 1st 10s of above 'iperf send' are over)
With 'iperf -s -w 256K' on both
The crash is not happening as such in the driver but in the 'iperf' context. I am going to copy-paste the stack trace:
PID: 8855 TASK: f7036550 CPU: 0 COMMAND: "iperf"
#0 [c074bed0] crash_kexec at c0443233
#1 [c074bf14] die at c04064d3
#2 [c074bf44] do_page_fault at c062134b
#3 [c074bf94] error_code (via page_fault) at c0405abb
EAX: f5888100 EBX: 00000000 ECX: 00100100 EDX: 00200200 EBP: 00000001
DS: 007b ESI: f5888000 ES: 007b EDI: cb614000
CS: 0060 EIP: c05c4e94 ERR: ffffffff EFLAGS: 00010046
#4 [c074bfc8] net_rx_action at c05c4e94
#5 [c074bfe4] __do_softirq at c042aa65
--- <soft IRQ> ---
#0 [f281ac4c] do_softirq at c04073e5
#1 [f281ac58] do_IRQ at c04074d9
#2 [f281ac70] common_interrupt at c0405975
EAX: 39383736 EBX: f281af4c ECX: 00000428 EDX: 31303938 EBP: f378b042
DS: 007b ESI: f378b1c2 ES: 007b EDI: 09fdb448
CS: 0060 EIP: c04f1c07 ERR: ffffffba EFLAGS: 00000202
#3 [f281aca4] __copy_to_user_ll at c04f1c07
#4 [f281acb0] memcpy_toiovec at c05bfecc
#5 [f281acc4] skb_copy_datagram_iovec at c05c059b
#6 [f281acf4] tcp_rcv_established at c05ef40a
#7 [f281ad20] tcp_v4_do_rcv at c05f48c5
#8 [f281ad54] tcp_prequeue_process at c05e6bdd
#9 [f281ad5c] tcp_recvmsg at c05e90e2
#10 [f281ad9c] sock_common_recvmsg at c05bb1c4
#11 [f281adc0] sock_recvmsg at c05b8dc6
#12 [f281aea0] sys_recvfrom at c05ba6ab
#13 [f281af64] sys_recv at c05ba727
#14 [f281af80] sys_socketcall at c05bab52
#15 [f281afb8] system_call at c0404f44
EAX: ffffffda EBX: 0000000a ECX: b6ba2340 EDX: 00014268
DS: 007b ESI: 00000000 ES: 007b EDI: 09fbe630
SS: 007b ESP: b6ba2328 EBP: b6ba2378
CS: 0073 EIP: 004ad410 ERR: 00000066 EFLAGS: 00000293
crash>
the EIP at the time of crash is net_rx_action:0xdd/19ca. Now i have compiled the kernel-2.6.18-238 sources( the source version of the OS on which the DUT is running) and did an 'objdump -S ./net/core/dev.o > dev_o_dmp' on the ./net/core/dev.c which has the definition of the net_rx_acdtion(). Now in the 'dev_o_dmp' file the net_rx_action() has lots of inline definitions and hence somehow does not exactly mirror the flow in the source file. In such a scenario ,is it safe to add 0xdd to the base addr of net_rx_action (say 32FF) => 340C .i.e would 340C be the offending line number that is giving rise to the crash ' kernel paging request error'
Any tips /recommendations on how to go about debugging this problem would be of great help
Unfortunately, or fortunately depending on your perspective, with high levels of optimization it is possible for the compiler to create assembly code that the debug format cannot make a reasonable C code line to assembly instruction(s) mapping. What type of cases you can run into this problem depends on the compiler, optimization level, debug symbol format, debug symbol level, and the code itself.
You have to assume that line numbers gained via this technique could be wrong. That being said, I use this technique frequently in my own kernel work and I have not had any problems yet (knocks on wood). Just remember that if you are faced with something that just makes no sense, you could have a bad line number.