The first App. which we implemented was a audio\/HDVideo low latency conference streaming application for smart phones.<\/p>\n
The second app was around\u00a0 MPEG<\/em>–TS<\/em><\/a>\u00a0to Elementary Stream demuxer<\/em> for some dreambox streaming fun \ud83d\ude42<\/p>\n The framework of choice is the swiss army knife for streaming stuff,.. ffmpeg<\/a>. To be more precise, ffmpeg consists of serveral libraries and the command line programs ffmpeg, ffplay, ffprobe.<\/p>\n I used the latest snapshot<\/a> available at the the time of writing. Extract the snapshot .tar to a folder of our choice.<\/p>\n Thanks Michael, the lead developer of ffmpeg, the ffmpeg source comes with the convenient autotools<\/a> facilities. So we only need to set the correct configure flags \ud83d\ude42<\/p>\n 1.<\/span> Compiler flags:<\/strong><\/p>\n As we need to do some cross-compiling we need to select the compiler\/assembler which comes with our XCode<\/p>\n –cc=’\/Applications\/Xcode.app\/Contents\/Developer\/Platforms\/iPhoneOS.platform\/Developer\/usr\/bin\/arm-apple-darwin10-llvm-gcc-4.2′.<\/p>\n –as=’.\/gas-preprocessor\/gas-preprocessor.pl \/applications\/xcode.app\/contents\/Developer\/Platforms\/iPhoneOS.platform\/Developer\/usr\/bin\/arm-apple-darwin10-gcc-4.2′<\/p>\n –arch=arm<\/p>\n –target-os=darwin<\/p>\n –cpu=cortex-a8<\/p>\n –enable-pic<\/p>\n –disable-yasm<\/p>\n 2<\/span>. iOs SDK path:<\/strong><\/p>\n –sysroot=’\/Applications\/Xcode.app\/Contents\/Developer\/Platforms\/iPhoneOS.platform\/Developer\/SDKs\/iPhoneOS5.1.sdk’<\/p>\n 3.<\/span> extra flags:<\/strong><\/p>\n –extra-cflags=’-mfpu=neon -pipe -Os -gdwarf-2 -miphoneos-version-min=5.0′<\/p>\n –extra-ldflags=’-arch armv7 -isysroot \/Applications\/Xcode.app\/Contents\/Developer\/Platforms\/iPhoneOS.platform\/Developer\/SDKs\/iPhoneOS5.1.sdk -miphoneos-version-min=5.0′<\/p>\n 4.<\/span> configure ffmpeg library components:<\/strong><\/p>\n for example:<\/p>\n \u00a0–disable-ffmpeg and then enable the\u00a0components you need<\/p>\n –enable-decoder=xxx after successful completion of .\/configure<\/em> run make<\/em>… and voil\u00e0 \ud83d\ude42<\/p>\n If you get some errors complaining about\u00a0 “error: invalid operand in inline asm: ” try to disable assembler directives with<\/p>\n –diasble-asm<\/p>\n have fun<\/p>\n Mario<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" In one of my latest projects I needed some audio\/video streaming capabilities for iOS driven devices. The first App. which we implemented was a audio\/HDVideo low latency conference streaming application for smart phones. The second app was around\u00a0 MPEG–TS\u00a0to Elementary Stream demuxer for some dreambox streaming fun \ud83d\ude42 The framework of choice is the swiss … Continue reading How to cross compile ffmpeg for iOS (iPhone and iPad)<\/span> What do you need:<\/h3>\n
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\n–disable-ffplay
\n–disable-ffprobe
\n–disable-ffserver
\n–disable-avdevice
\n–disable-avfilter
\n–disable-everything<\/p>\n
\n–enable-parser=xxx
\n–enable-demuxer=xxx<\/p>\n