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• Rtsp streaming with 3gp (Video encoded with ffmpeg) breaking every 8 seconds

  8 août 2012, par user1581063

  I have set up Darwin streaming server(6.0) to stream rtsp on android / other mobile devices in AWS using Ec2.
  I have opened all UDP and necessary tcp ports required for playing RTSP

  I am using ffmpeg to encode videos. Below is the command used for encoding a H264 video to H263.

  ffmpeg -i test1.mp4 -f 3gp -s 176x144 -vcodec h263 -b:v 339k -r 14.895 -acodec libamr_nb -ac 1 -ar 8000 -ab 12.2k -y test.3gp

  The encoded videos stops every multiples of 8 seconds, bufffers and plays again in all Android phone(< 4.0).

  I tried all the options still the behavior is same. The same RTSP link plays well with Daroon player( downloaded from google play) on Android or VLC player in windows.

  I am not able to figure whether its a encoding issue or server side issue.

  Link for the mobile : m.try.vasop.com/rtsp.php

  Link for the RTSP : rtsp ://175.41.130.157/1343973357914_h263.3gp

• Resurrecting SCD

  6 août 2010, par Multimedia Mike — Reverse Engineering

  When I became interested in reverse engineering all the way back in 2000, the first Win32 disassembler I stumbled across was simply called "Win32 Program Disassembler" authored by one Sang Cho. I took to calling it ’scd’ for Sang Cho’s Disassembler. The original program versions and source code are still available for download. I remember being able to compile v0.23 of the source code with gcc under Unix ; 0.25 is no go due to extensive reliance on the Win32 development environment.

  I recently wanted to use scd again but had some trouble compiling. As was the case the first time I tried compiling the source code a decade ago, it’s necessary to transform line endings from DOS -> Unix using ’dos2unix’ (I see that this has been renamed to/replaced by ’fromdos’ on Ubuntu).

  Beyond this, it seems that there are some C constructs that used to be valid but are now rejected by gcc. The first looks like this :

  PLAIN TEXT

  C :

  1. return (int) c = *(PBYTE)((int)lpFile + vCodeOffset) ;

  Ahem, "error : lvalue required as left operand of assignment". Removing the "(int)" before the ’c’ makes the problem go away. It’s a strange way to write a return statement in general. However, ’c’ is a global variable that is apparently part of some YACC/BISON-type output.

  The second issue is when a case-switch block has a default label but with no code inside. Current gcc doesn’t like that. It’s necessary to at least provide a break statement after the default label.

  Finally, the program turns out to not be 64-bit safe. It is necessary to compile it in 32-bit mode (compile and link with the ’-m32’ flag or build on a 32-bit system). The static 32-bit binary should run fine under a 64-bit kernel.

  Alternatively : What are some other Win32 disassemblers that work under Linux ?

• static declaration of lrint follows non static declaration "-wfatal errors"

  4 juin 2014, par Smith

  I have trying building ffmpeg library for android from centos (version 6.5). I have download source form ffmpeg-android

  I have follows the command that mentioned in given link to build ffmpeg library. When I have tried to run ./config_make_everything.sh this shell command then I got following error shows in attached screenshot :
  Error

  Please help me what I did wrong ?