Buffer Underflow Error

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Rc Buffer Underflow

x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; buffer underflow kryo it only takes a minute: Sign up C: What is a/example of a buffer underflow? [duplicate] up vote 8 down vote favorite 2 This question already has an answer here: What are arithmetic underflow and overflow in C? 4 answers

Buffer Underflow Exception

I know what a buffer overflow is. I have no idea however what a buffer underflow is. I am guessing it is when a specific buffer receives instead of an overflow of bytes, an underflow of bytes. char buffer[8]; fgets(buffer, sizeof(buffer), stdin); The above would give no error. char buffer_overflow[8]; fgets(buffer_overflow, 16, stdin); The above would result in a buffer overflow if the user input was, for example "deutschland". Could I get an example in code, what a buffer ffmpeg buffer underflow underflow is? c share|improve this question edited Oct 8 '14 at 13:11 asked Oct 8 '14 at 13:04 Karl Morrison 3,142103883 marked as duplicate by Almo, Sani Huttunen, Ross Drew, Sajeetharan, CRABOLO Oct 13 '14 at 1:39 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. 6 @2501 No, arithmetic underflow/overflow is something completely different. –Graham Borland Oct 8 '14 at 13:08 6 @2501 this is completely not a duplicate, there are a arithmetic over/under-flows. Not buffers. –m0nhawk Oct 8 '14 at 13:09 1 some people decrease their pointers, instead of increasing, up to a point, underflow could happen. almost the same thing as overflow. –HuStmpHrrr Oct 8 '14 at 13:27 add a comment| 2 Answers 2 active oldest votes up vote 11 down vote accepted A buffer underflow does not relate directly to a buffer overflow. However, buffer underflows can be an issue with e.g. ring buffers. Consider for example audio playback: your audio buffer is probably a ring buffer somewhere in kernel memory. If you write data slower than the audio driver/hardware reads from the buffer, the buffer becomes empty ("underflows"), leading to stuttering audio. Similar issues exist for other kinds of real-time data processing and media playback, too. Thus a buffer underflow is often not a fault condition per se (unlike a buffer overflow, whic

on the stack and on the heap, are a major source of security vulnerabilities in C, Objective-C, and C++ code. This chapter discusses coding practices that will avoid buffer overflow and underflow problems, lists tools you can use to detect buffer

Kryoexception Buffer Underflow

overflows, and provides samples illustrating safe code.Every time your program solicits input (whether from

Buffer Underrun Error

a user, from a file, over a network, or by some other means), there is a potential to receive inappropriate data. For buffer underrun error was avoided example, the input data might be longer than what you have reserved room for in memory.When the input data is longer than will fit in the reserved space, if you do not truncate it, that data will http://stackoverflow.com/questions/26257639/c-what-is-a-example-of-a-buffer-underflow overwrite other data in memory. When this happens, it is called a buffer overflow. If the memory overwritten contained data essential to the operation of the program, this overflow causes a bug that, being intermittent, might be very hard to find. If the overwritten data includes the address of other code to be executed and the user has done this deliberately, the user can point to malicious code that your program will then https://developer.apple.com/library/content/documentation/Security/Conceptual/SecureCodingGuide/Articles/BufferOverflows.html execute.Similarly, when the input data is or appears to be shorter than the reserved space (due to erroneous assumptions, incorrect length values, or copying raw data as a C string), this is called a buffer underflow. This can cause any number of problems from incorrect behavior to leaking data that is currently on the stack or heap.Although most programming languages check input against storage to prevent buffer overflows and underflows, C, Objective-C, and C++ do not. Because many programs link to C libraries, vulnerabilities in standard libraries can cause vulnerabilities even in programs written in “safe” languages. For this reason, even if you are confident that your code is free of buffer overflow problems, you should limit exposure by running with the least privileges possible. See Elevating Privileges Safely for more information on this topic.Keep in mind that obvious forms of input, such as strings entered through dialog boxes, are not the only potential source of malicious input. For example:Buffer overflows in one operating system’s help system could be caused by maliciously prepared embedded images.A commonly-used media player failed to validate a specific type of audio files, allowing an attacker to execute arbitrary code by causing a buffer overflow with a carefully crafted audio file.[1CVE-2006-1591 2CVE-2006-1370]There are two basic categories of overflow: stack overflows and heap overf

DVD VCD Glossary > VideoHelp Forum Index New Posts Today's Posts Rules Register Help Remember Me? Lost password/username? Forum Video Video Conversion ffmpeg buffer underflow & packet too large errors + Reply to Thread Results 1 http://forum.videohelp.com/threads/364555-ffmpeg-buffer-underflow-packet-too-large-errors to 30 of 30 ffmpeg buffer underflow & packet too large errors Thread Tools Show Printable Version Email this Page Subscribe to this Thread Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Thread 15th https://www.vegascreativesoftware.info/us/forum/blu-ray-authoring-error-buffer-underflow--73062/ May 201405:39 #1 rookieauthor View Profile View Forum Posts Private Message Member Join Date : May 2014 Location : Planet Earth Hi folks, Following on from my previous thread (here), I am hoping to re-encode 800 video buffer underflow clips which are 3 hours and 4 minutes combined and 11.7 GB in size from my friends camera and fit them onto 2 DVD's (no authoring or menu's required, just pure video footage). GSpot gives the following info on the codec of the clips: Code: Container DVD "VOB" format MPEG-2 Program Stream << { 1 vid, 1 aud } Sys Bitrate: 10080 kb/s VBR Video Codec: MPEG2 FPS: 25 WxD: 720 x 576 Average birate: buffer underrun error 8804 Audio Codec: AC3 Info: 0xbd[0x80]:48000Hz 256 kb/s tot , stereo (2/0) I have a .txt. file with paths to all the clips and I am using this command in ffmpeg: Code: ffmpeg -f concat -i d:\video\mylist.txt -c copy d:\video\output.mpg The result is 10s of errors every second (see below) and the output video freezing on the first frame and not playing any longer than 7 seconds: Code: [mpeg @ 00000000055fe720] buffer underflow st=1 bufi=37828 size=66833 [mpeg @ 00000000055fe720] buffer underflow st=1 bufi=39865 size=66833 [mpeg @ 00000000055fe720] packet too large, ignoring buffer limits to mux it [mpeg @ 00000000055fe720] buffer underflow st=1 bufi=39865 size=66833 [mpeg @ 00000000055fe720] buffer underflow st=1 bufi=41902 size=66833 [mpeg @ 00000000055fe720] packet too large, ignoring buffer limits to mux it I have no previous experience in video encoding and would appreciate assistance. Quote 15th May 201411:18 #2 LigH.de View Profile View Forum Posts Private Message Member Join Date : Aug 2013 Location : Central Germany DVD Authoring should be done in software specifically made for this purpose; ffmpeg is not. A "DVD Video" is more than just one movie, most of all it is a logical structure. More than just a concatenated clip sequence. I would not even be certain if ffmpeg knows that all these clips should be treated as DVD Video compatible while r

AM Hey everyone, I have a couple of small Blu-ray projects I'm making and didn't change a thing on my processes... I'm now getting this error: TSWrapper.dll::CTSWrapper::ProcThreadMain::Video buffer underflows. Anyone know what is causing this? Follow Thanks Quote More Direct link Report Go to solution Direct link Report 47 Answers Go to solution Comments the solution Steve Grisetti wrote on 07/17/2009, 08:55 AM Can you tell us more about your workflow? What are your source files and where did they come from? (What type of camcorder? Were they output from Vegas?) How much free, defragmented space is left on your hard drive? Are you working off your C drive or a second hard drive? Finally, have you ensured that you have all of the latest updates to your operating system and that you have installed the latest version of Quicktime (which is essential to all media work on both Macs and PCs). Thanks Quote More Direct link Report Direct link Report the solution jcloninger wrote on 07/17/2009, 09:06 AM Hey Steve... everything up to date and I have seperate hard drive for each step System>Capture>Render>Author etc... I authored 2 discs yesterday and 3 more day before that... never had a problem before... nothing has changed. Capture and edit HDV from Canon XH-A1 cams in Vegas 9. Render to the Sony AVC 15mbps template without any changes to template... also render ac3 audio from vegas... DVDA 5.0b Bluray AVC 1440x1080 60i project.... Stuff I find on the net and even SCS help (suggestions before sending inquiry) says probably over the bitrate... NO files are over bitrate... Thanks Quote More Direct link Report Direct link Report the solution musicvid10 wrote on 07/17/2009, 09:32 AM Turn down your burning speed. Close all unnecessary background operations and stay off the internet while burning. Use the best media possible. Make sure your burner firmware