[android-developers] SSHFS on Android
I'm trying to run sshfs on Android. This is essentially a Proof of Concept for something else I'm trying to do (essentially a FUSE mount backed by an SSL connection to a remote server), but I figured that getting the binary working would be a decent POC (my eventual goal is to build an Android service that does this). Using the OpenMoko Toolchain (since the ndk toolchain doesn't have all the required headers), I got the Fuse library and the (static) sshfs binary to build. I pushed it to a development handset, and tried running it (via an ADB root prompt). When using an SSHFS command that worked on a ubuntu box (both are connecting to a Mac on the same local network), I get the following error: read: Connection reset by peer Looking into this error, it appears to have something to do with the ssh layer not being setup correctly (sometimes it happens due to issues with known_hosts). Since the root user on Android doesn't have a standard account setup, I'm guessing that this is causing it to not work. I'm also having trouble getting a command-line ssh client to work (and I believe it's for similar reasons). When I download ConnectBot, it connects just fine, although that isn't using a full command-line client (it's just a library that is invoked using JNI). Any hints or suggestions on getting this to work? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: SSHFS on Android
On Dec 13, 12:22 pm, Chris Stratton cs07...@gmail.com wrote: On Dec 13, 2:12 pm, Dana L dana11...@gmail.com wrote: I'm trying to run sshfs on Android. Does your kernel have the necessary support? I haven't built support into the kernel yet, although this appears to be an SSH error rather than a FUSE error. I think I'm going to take a step back and build a simpler FUSE-based program to get FUSE support working. I get the following error: read: Connection reset by peer Can you instrument the code to better undestand the nature of the failure? I'm also having trouble getting a command-line ssh client to work (and I believe it's for similar reasons). You might want to attack that problem first, again perhaps by instrumenting the code (or even check for a verbose option on the command line?) Thanks for the suggestions. Just seeing whether anyone has prior experience with this. Also, it might be worth the quick check of using netcat instead of ssh to do a crude telnet connection - if even that won't work, I'd look at network problems. I can ping the server successfully (using ping). So it isn't a connectivity issue. As for the suggestion to move to android-ndk, that may not be wholly on topic either - the long range project probably belongs on kernel or platform. Doesn't seem like an ndk issue (at least for now). I'm not actually using the ndk, because the ndk toolchain lacks the fuse header files. Although, after I get the POC working, I might see whether I can actually add some files to the ndk toolchain to get this working, and build using the NDK build system. Thanks for the suggestions. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: SSHFS on Android
Just providing an update. I added FUSE support into my kernel (by building and loading a module), and I was able to use httpfs (http://httpfs.sourceforge.net/) to mount an http file via FUSE. However, I still get the same error with sshfs. So I've pretty much isolated this to an error with the ssh layer. I have successfully validated what I was looking for (basic FUSE functionality on Android), and don't need this to work from a straight command-line console app (since this is going to be part of an android service), but I would like to figure out why this isn't working, and see whether I can fix it. If anyone has thoughts on how this can be fixed, please let me know. On Dec 13, 2:11 pm, Dana L dana11...@gmail.com wrote: On Dec 13, 12:22 pm, Chris Stratton cs07...@gmail.com wrote: On Dec 13, 2:12 pm, Dana L dana11...@gmail.com wrote: I'm trying to run sshfs on Android. Does your kernel have the necessary support? I haven't built support into the kernel yet, although this appears to be an SSH error rather than a FUSE error. I think I'm going to take a step back and build a simpler FUSE-based program to get FUSE support working. I get the following error: read: Connection reset by peer Can you instrument the code to better undestand the nature of the failure? I'm also having trouble getting a command-line ssh client to work (and I believe it's for similar reasons). You might want to attack that problem first, again perhaps by instrumenting the code (or even check for a verbose option on the command line?) Thanks for the suggestions. Just seeing whether anyone has prior experience with this. Also, it might be worth the quick check of using netcat instead of ssh to do a crude telnet connection - if even that won't work, I'd look at network problems. I can ping the server successfully (using ping). So it isn't a connectivity issue. As for the suggestion to move to android-ndk, that may not be wholly on topic either - the long range project probably belongs on kernel or platform. Doesn't seem like an ndk issue (at least for now). I'm not actually using the ndk, because the ndk toolchain lacks the fuse header files. Although, after I get the POC working, I might see whether I can actually add some files to the ndk toolchain to get this working, and build using the NDK build system. Thanks for the suggestions. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Segmented video streaming on Android
I couldn't find any good documentation on StageFright, and I didn't get much by looking through the code. Supposedly StageFright is pretty buggy, so it makes sense to use OpenCore for the time being (maybe Gingerbread will address some of the problems). I'm sort of surprised that Android doesn't support this stuff out of the box. Maybe they will add support for HTTP Live Streaming or at the very least invent their own live streaming protocol. On Oct 28, 3:11 pm, Kristian kristian.even...@gmail.com wrote: Hi, Thanks, I am working on some possible solutions now. One idea I have is to skip MediaPlayer altogheter and write some native-code that will communicate directly with Stagefright/OpenCore. However, after a quick look through their source, they seem to not allow me the freedom I want either. A possible solution would be to feed the raw h264 bytestream to the media-framework (if possible) and send the frames back up to the GUI through JNI. Btw, do you have any or know of any examples of how to use Stagefright/ Opencore? -Kristian On Oct 27, 9:01 pm, Dana L dana11...@gmail.com wrote: There have been a couple of threads on this topic over the past few weeks. I've been trying to get this working as well, and no matter what I do, there is always a brief pause between segments. I have seen a bunch of other suggested approaches on here that also don't work. I've managed to do POCs of video streaming to Android with both Flash and via RTSP. Unfortunately, performance isn't as good as MP4 playback, even using the same video codec (h264). It seems like the only option that would actually work is to write a custom media player in native code. The following company has a working solution (they implement Apple's HTTP Live Streaming Protocol in a custom player). Performance isn't superb (you aren't going to get 720p playback), but it works at a reasonable resolution.http://www.nextreaming.com/ If you manage to get this working, please let me know. - Dana On Oct 27, 8:32 am, Kristian kristian.even...@gmail.com wrote: Hello, I am working on an porting an application supporting segmented video streaming to Android. For those who are not familiar with segmented streaming, it is when a complete video is divided into multiple segments. Each segment can then, for example, be encoded at different qualities to support different clients. Anyway, my problem is that I am not able to get a smooth transition between segments. Currently, the only way I have gotten segmented streaming working, is to write the segments into independent, temporary files, and then load each file into the MediaPlayer once the previous has finished. This causes an interruption in playback between each segment, probably due to the I/O involved. I have looked around for different solutions, among others, playlists and storing the videos directly in memory. However, none seem to work or be supported by Android. Also, I tried creating two MediaPlayer- objects and do something similar to double-buffering by preparing the next segment well ahead of the previous, but it only made the application unstable. My question is therefore: Does anyone have any hints, tips or examples for how to do smooth transition between video segments? The segments I am working with are independent, so there is no dependency and they can be viewed as X number of independent video files. -Kristian -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Segmented video streaming on Android
There have been a couple of threads on this topic over the past few weeks. I've been trying to get this working as well, and no matter what I do, there is always a brief pause between segments. I have seen a bunch of other suggested approaches on here that also don't work. I've managed to do POCs of video streaming to Android with both Flash and via RTSP. Unfortunately, performance isn't as good as MP4 playback, even using the same video codec (h264). It seems like the only option that would actually work is to write a custom media player in native code. The following company has a working solution (they implement Apple's HTTP Live Streaming Protocol in a custom player). Performance isn't superb (you aren't going to get 720p playback), but it works at a reasonable resolution. http://www.nextreaming.com/ If you manage to get this working, please let me know. - Dana On Oct 27, 8:32 am, Kristian kristian.even...@gmail.com wrote: Hello, I am working on an porting an application supporting segmented video streaming to Android. For those who are not familiar with segmented streaming, it is when a complete video is divided into multiple segments. Each segment can then, for example, be encoded at different qualities to support different clients. Anyway, my problem is that I am not able to get a smooth transition between segments. Currently, the only way I have gotten segmented streaming working, is to write the segments into independent, temporary files, and then load each file into the MediaPlayer once the previous has finished. This causes an interruption in playback between each segment, probably due to the I/O involved. I have looked around for different solutions, among others, playlists and storing the videos directly in memory. However, none seem to work or be supported by Android. Also, I tried creating two MediaPlayer- objects and do something similar to double-buffering by preparing the next segment well ahead of the previous, but it only made the application unstable. My question is therefore: Does anyone have any hints, tips or examples for how to do smooth transition between video segments? The segments I am working with are independent, so there is no dependency and they can be viewed as X number of independent video files. -Kristian -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] RTSP Video Performance
I'm streaming video via RTSP to Android, using an RTP container, x264 video, and mp4a audio. I've been using 96kbps audio, 384 kbps video, and 480x270 resolution. I'm playing the video back in a standard VideoView (I'm pointing the player at the rtsp sdp). On my test system (a Droid 2), I find that the video is somewhat jerky? Is there a better way to be doing this? It seems like the video playback should be hardware accelerated, considering that I'm using standard video and audio formats. Is there some sort of problem with the performance of RTP streams? Thanks for any help or suggestions. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: How to get Android Source code?
You can get GIT for Windows. There are at least two options: MSYSGit http://code.google.com/p/msysgit/ Cygwin GIT http://cygwin.com/packages/git/ On Oct 7, 2:38 am, Indu isadas...@gmail.com wrote: I am having trouble with one of the phones. It is using Version 2.1 - update 1. I would like to download the source code to check that. However, I am on Windows platform, so I cannot use GIT. Is there any other way to download/browse the code for this particular release? I could not find this version under android.git.kernel.org. Any pointers? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Gapless Video Playback?
I'm trying to build a live streaming player by downloading video segments (which are generated in real-time) and then playing them back in sequence. While I can get the segments to play, I need to get it so that there isn't a pause between playback of successive segments. I've tried using both MediaPlayer (with an appropriate SurfaceView) and VideoView, but there's always a small gap between segments. If I try to load a new video into a MediaPlayer when the first segment finishes playing, it seems to take half a second or so before the next segment is loaded and starts playing. I have also tried having multiple SurfaceViews within a single ContentView (with only the active one being visible), but it seems like you can't prepare a video until the associated SurfaceView is visible. I also tried having multiple ContentViews that I switch between, but again, this has similar issues. Any ideas or suggestions? Is it possible to somehow get the next segment to begin decoding as soon as the first one is decoded (which could be before it finishes playing)? Am I going to need to build a custom video player in order to do this? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
