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Statically built FFMPEG binary segmentation fault
12 février 2020, par stevendesuI want to create a custom build of FFMPEG which rips out everything except for the ability to transmux HLS videos to MP4, and I need this build to be 100% static with no external dependencies
I tried using the following configuration:
./configure \ --extra-cflags='-static -static-libstdc++ -static-libgcc' \ --extra-cxxflags='-static -static-libstdc++ -static-libgcc' \ --extra-ldflags='-static -static-libstdc++ -static-libgcc' \ --pkg-config-flags='--static' \ --enable-static \ --disable-shared \ --disable-runtime-cpudetect \ --disable-autodetect \ --disable-ffplay \ --disable-ffprobe \ --disable-doc \ --disable-avdevice \ --disable-swresample \ --disable-swscale \ --disable-postproc \ --disable-pthreads \ --disable-w32threads \ --disable-os2threads \ --enable-network \ --disable-dct \ --disable-dwt \ --disable-error-resilience \ --disable-lsp \ --disable-lzo \ --disable-mdct \ --disable-rdft \ --disable-fft \ --disable-faan \ --disable-pixelutils \ --disable-encoders \ --disable-decoders \ --disable-hwaccels \ --disable-muxers \ --enable-muxer=mov \ --enable-muxer=mp4 \ --disable-demuxers \ --enable-demuxer=hls \ --enable-demuxer=mpegts \ --enable-demuxer=h264 \ --enable-demuxer=aac \ --disable-parsers \ --enable-parser=h264 \ --enable-parser=aac \ --disable-bsfs \ --disable-protocols \ --enable-protocol=tcp \ --enable-protocol=tls \ --enable-protocol=http \ --enable-protocol=https \ --enable-protocol=hls \ --disable-indevs \ --disable-outdevs \ --disable-devices \ --disable-filters \ --disable-alsa \ --disable-appkit \ --disable-avfoundation \ --disable-bzlib \ --disable-coreimage \ --disable-iconv \ --disable-lzma \ --enable-openssl \ --disable-sndio \ --disable-sdl2 \ --disable-securetransport \ --disable-xlib \ --disable-zlib \ --disable-amf \ --disable-audiotoolbox \ --disable-cuda-llvm \ --disable-cuvid \ --disable-d3d11va \ --disable-dxva2 \ --disable-ffnvcodec \ --disable-nvdec \ --disable-nvenc \ --disable-v4l2-m2m \ --disable-vaapi \ --disable-vdpau \ --disable-videotoolbox \ --disable-debugThis looked about like what I wanted:
install prefix /usr/local source path . C compiler gcc C library glibc ARCH x86 (generic) big-endian no runtime cpu detection no standalone assembly yes x86 assembler nasm MMX enabled yes MMXEXT enabled yes 3DNow! enabled yes 3DNow! extended enabled yes SSE enabled yes SSSE3 enabled yes AESNI enabled yes AVX enabled yes AVX2 enabled yes AVX-512 enabled yes XOP enabled yes FMA3 enabled yes FMA4 enabled yes i686 features enabled yes CMOV is fast yes EBX available yes EBP available yes debug symbols no strip symbols yes optimize for size no optimizations yes static yes shared no postprocessing support no network support yes threading support no safe bitstream reader yes texi2html enabled no perl enabled yes pod2man enabled yes makeinfo enabled no makeinfo supports HTML no External libraries: openssl External libraries providing hardware acceleration: Libraries: avcodec avfilter avformat avutil Programs: ffmpeg Enabled decoders: Enabled encoders: Enabled hwaccels: Enabled parsers: aac h264 Enabled demuxers: aac h264 hls mpegts Enabled muxers: mov mp4 Enabled protocols: hls http https tcp tls Enabled filters: aformat anull atrim format hflip null transpose trim vflip Enabled bsfs: null Enabled indevs: Enabled outdevs: License: LGPL version 2.1 or laterIt included several filters which I won't ever need or use, but these filters are pulled in automatically if you don't specify
--disable-avfilter, and specifying--disable-avfilterprevents theffmpegbinary from being produced. So I'm stuck with those.Using these parameters and then running
make, I received a binary that was about 5.9 MB in size and looked right:$> ldd ffmpeg not a dynamic executableBut when I try to run it:
$> ./ffmpeg -version Segmentation faultUsing valgrind to try and inspect the cause of the segmentation fault:
$> valgrind ./ffmpeg -version .... lots of stuff ... ==61362== Jump to the invalid address stated on the next line ==61362== at 0x0: ??? ==61362== by 0x70BB1B: ??? (in /src/FFmpeg/ffmpeg) ==61362== by 0x70B2E6: ??? (in /src/FFmpeg/ffmpeg) ==61362== by 0x4033F9: ??? (in /src/FFmpeg/ffmpeg) ==61362== by 0x1FFF000677: ??? ==61362== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==61362== ==61362== ==61362== Process terminating with default action of signal 11 (SIGSEGV) ==61362== Bad permissions for mapped region at address 0x0 ==61362== at 0x0: ??? ==61362== by 0x70BB1B: ??? (in /src/FFmpeg/ffmpeg) ==61362== by 0x70B2E6: ??? (in /src/FFmpeg/ffmpeg) ==61362== by 0x4033F9: ??? (in /src/FFmpeg/ffmpeg) ==61362== by 0x1FFF000677: ??? ==61362== ==61362== HEAP SUMMARY: ==61362== in use at exit: 0 bytes in 0 blocks ==61362== total heap usage: 0 allocs, 0 frees, 0 bytes allocated ==61362== ==61362== All heap blocks were freed -- no leaks are possible ==61362== ==61362== For counts of detected and suppressed errors, rerun with: -v ==61362== Use --track-origins=yes to see where uninitialised values come from ==61362== ERROR SUMMARY: 93 errors from 90 contexts (suppressed: 0 from 0) Segmentation faultAttempting to access memory at location
0x0sounds like trying to follow a null pointer. But I'm not sure how to fix this.gdb backtrace
When I first ran
gdb ./ffmpeggdb immediately gave me a segmentation fault and I wasn't kicked into the gdb REPL, so I couldn't investigateAfter rebuilding ffmpeg I was able to get in this time:
$> gdb ./ffmpeg GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later /gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: /www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: /www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ffmpeg...done. (gdb) r Starting program: /src/FFmpeg/ffmpeg warning: Error disabling address space randomization: Operation not permitted Program received signal SIGSEGV, Segmentation fault. 0x0000000000000000 in ?? () (gdb) bt #0 0x0000000000000000 in ?? () #1 0x0000000000f9a8d5 in __register_frame_info_bases.part.6 () #2 0x00000000004445fd in frame_dummy () #3 0x0000000000000001 in ?? () #4 0x0000000000ebd20c in __libc_csu_init () #5 0x0000000000ebc9d7 in __libc_start_main () #6 0x000000000044451a in _start () (gdb)I tried grep'ing the code base for
__register_frame_info_basesand found nothing. So I'm not really sure where to go from hereA fix, but not an explanation
By randomly removing configuration parameters and rebuilding I discovered that
--disable-pthreadswas causing the segmentation fault. When I remove this, ffmpeg runs just fineI don't know why this is the case, though. Why would they make it possible to remove something that you need to run?
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How to loop video with varying sizes over static image using ffmpeg, (has frame stutter issue)
12 février 2020, par Kian Kordtomeikel'ffmpeg -loop 1 -i "' + Background + '" -i "' + curvideosloc + '" -filter_complex "overlay=(W-w)/2:(H-h)/2:shortest=1,format=yuv420p" "' + finalvideoloc + '"'
The above is the command that I currently use to set a background (which is 1080p) over a video (which changes in size throughout the video to a max size of 1800 by 900), however when I do this, at most (for some reason not all) points in which the video file size changes it has a stutter where it just displays the static background then puts the video back on top and I can't figure out why. Any ideas?
Thanks!
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How FFmpeg CRF works
12 février 2020, par park johHow FFmpeg
-CRFworks?How do they decide the best quality of this specific second?
Will we get better results if I will split the file by seconds and encode each slice separately with
-CRFand then join all the slices or would I will get the same/wors results and why? -
ffmpeg conversion : Twitter rejects video with "Not valid video"
12 février 2020, par DeadlyBaconI have an app that uploads via twitter api chunked upload, and it finally works with photos.
However, I am trying to get it to work with videos.
Uploading didnt work out-of-the-box even though the video format is mp4. The twitter guidelines for uploads are these
With that in mind, I have this ffmpeg command so far:
ffmpeg -i in.mp4 -vf \"scale=1280:720\" -b:v 5000K -minrate 5000K -maxrate 5000K -b:a 128K -r 30 -f mp4 -vcodec libx264 -profile:v high -pix_fmt yuv420p -strict -2 -ac 2 -acodec aac out.mp4I still get "Not valid video", and I don't know why.
Here's my mediainfo output for out.mp4:
General Count : 328 Count of stream of this kind : 1 Kind of stream : General Kind of stream : General Stream identifier : 0 Count of video streams : 1 Count of audio streams : 1 Video_Format_List : AVC Video_Format_WithHint_List : AVC Codecs Video : AVC Video_Language_List : English Audio_Format_List : AAC Audio_Format_WithHint_List : AAC Audio codecs : AAC LC Audio_Language_List : English Complete name : video-5e4405cd4348a5e4405cd434d2.mp4 File name : video-5e4405cd4348a5e4405cd434d2 File extension : mp4 Format : MPEG-4 Format : MPEG-4 Format/Extensions usually used : mov mp4 m4v m4a m4b m4p 3ga 3gpa 3gpp 3gp 3gpp2 3g2 k3g jpm jpx mqv ismv isma ismt f4a f4b f4v Commercial name : MPEG-4 Format profile : Base Media Internet media type : video/mp4 Codec ID : isom Codec ID : isom (isom/iso2/avc1/mp41) Codec ID/Url : http://www.apple.com/quicktime/download/standalone.html CodecID_Compatible : isom/iso2/avc1/mp41 Codec : MPEG-4 Codec : MPEG-4 Codec/Extensions usually used : mov mp4 m4v m4a m4b m4p 3ga 3gpa 3gpp 3gp 3gpp2 3g2 k3g jpm jpx mqv ismv isma ismt f4a f4b f4v File size : 52664272 File size : 50.2 MiB File size : 50 MiB File size : 50 MiB File size : 50.2 MiB File size : 50.22 MiB Duration : 79744 Duration : 1 min 19 s Duration : 1 min 19 s 744 ms Duration : 1 min 19 s Duration : 00:01:19.744 Duration : 00:01:19:20 Duration : 00:01:19.744 (00:01:19:20) Overall bit rate : 5283334 Overall bit rate : 5 283 kb/s Frame rate : 30.000 Frame rate : 30.000 FPS Frame count : 2390 Stream size : 88780 Stream size : 86.7 KiB (0%) Stream size : 87 KiB Stream size : 87 KiB Stream size : 86.7 KiB Stream size : 86.70 KiB Stream size : 86.7 KiB (0%) Proportion of this stream : 0.00169 HeaderSize : 40 DataSize : 52575500 FooterSize : 88732 IsStreamable : No File last modification date : UTC 2020-02-12 14:05:37 File last modification date (local) : 2020-02-12 15:05:37 Writing application : Lavf57.83.100 Writing application : Lavf57.83.100 Video Count : 342 Count of stream of this kind : 1 Kind of stream : Video Kind of stream : Video Stream identifier : 0 StreamOrder : 0 ID : 1 ID : 1 Format : AVC Format/Info : Advanced Video Codec Format/Url : http://developers.videolan.org/x264.html Commercial name : AVC Format profile : High@L3.1 Format settings : CABAC / 4 Ref Frames Format settings, CABAC : Yes Format settings, CABAC : Yes Format settings, ReFrames : 4 Format settings, ReFrames : 4 frames Internet media type : video/H264 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Codec : AVC Codec : AVC Codec/Family : AVC Codec/Info : Advanced Video Codec Codec/Url : http://developers.videolan.org/x264.html Codec/CC : avc1 Codec profile : High@L3.1 Codec settings : CABAC / 4 Ref Frames Codec settings, CABAC : Yes Codec_Settings_RefFrames : 4 Duration : 79667 Duration : 1 min 19 s Duration : 1 min 19 s 667 ms Duration : 1 min 19 s Duration : 00:01:19.667 Duration : 00:01:19:20 Duration : 00:01:19.667 (00:01:19:20) Bit rate : 5000000 Bit rate : 5 000 kb/s Width : 1280 Width : 1 280 pixels Height : 720 Height : 720 pixels Sampled_Width : 1280 Sampled_Height : 720 Pixel aspect ratio : 1.000 Display aspect ratio : 1.778 Display aspect ratio : 16:9 Rotation : 0.000 Frame rate mode : CFR Frame rate mode : Constant FrameRate_Mode_Original : VFR Frame rate : 30.000 Frame rate : 30.000 FPS Frame count : 2390 Resolution : 8 Resolution : 8 bits Colorimetry : 4:2:0 Color space : YUV Chroma subsampling : 4:2:0 Chroma subsampling : 4:2:0 Bit depth : 8 Bit depth : 8 bits Scan type : Progressive Scan type : Progressive Interlacement : PPF Interlacement : Progressive Bits/(Pixel*Frame) : 0.181 Stream size : 51297022 Stream size : 48.9 MiB (97%) Stream size : 49 MiB Stream size : 49 MiB Stream size : 48.9 MiB Stream size : 48.92 MiB Stream size : 48.9 MiB (97%) Proportion of this stream : 0.97404 Writing library : x264 - core 152 r2854 e9a5903 Writing library : x264 core 152 r2854 e9a5903 Encoded_Library_Name : x264 Encoded_Library_Version : core 152 r2854 e9a5903 Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=5000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00 Language : en Language : English Language : English Language : en Language : eng Language : en Audio Count : 275 Count of stream of this kind : 1 Kind of stream : Audio Kind of stream : Audio Stream identifier : 0 StreamOrder : 1 ID : 2 ID : 2 Format : AAC Format/Info : Advanced Audio Codec Commercial name : AAC Format profile : LC Format settings, SBR : No (Explicit) Format settings, SBR : No (Explicit) Codec ID : mp4a-40-2 Codec : AAC LC Codec : AAC LC Codec/Family : AAC Codec/CC : 40 Duration : 79744 Duration : 1 min 19 s Duration : 1 min 19 s 744 ms Duration : 1 min 19 s Duration : 00:01:19.744 Duration : 00:01:19:25 Duration : 00:01:19.744 (00:01:19:25) Bit rate mode : CBR Bit rate mode : Constant Bit rate : 128257 Bit rate : 128 kb/s Channel(s) : 2 Channel(s) : 2 channels Channel positions : Front: L R Channel positions : 2/0/0 ChannelLayout : L R Samples per frame : 1024 Sampling rate : 48000 Sampling rate : 48.0 kHz Samples count : 3827712 Frame rate : 46.875 Frame rate : 46.875 FPS (1024 SPF) Frame count : 3738 Compression mode : Lossy Compression mode : Lossy Stream size : 1278470 Stream size : 1.22 MiB (2%) Stream size : 1 MiB Stream size : 1.2 MiB Stream size : 1.22 MiB Stream size : 1.219 MiB Stream size : 1.22 MiB (2%) Proportion of this stream : 0.02428 Language : en Language : English Language : English Language : en Language : eng Language : en Default : Yes Default : Yes Alternate group : 1 Alternate group : 1Edit: Guess Ill add my PHP code too (This is chopped in a sensible manner because the actual file is very large):
// Set up Codebird \Codebird\Codebird::setConsumerKey($consumer_key, $consumer_secret); // static, see README $cb = \Codebird\Codebird::getInstance(); $cb->setToken($token, $token_secret); $cb->setTimeout(60 * 1000); // 60 second request timeout $video = new Video($path); // Convert to the parameter required by twitter. $converted = $video->convert(); $path = realpath('videos/' . $converted); $file = fopen($path, 'rb'); $size = fstat($file)['size']; $mime_type = mime_content_type($path); $media = $cb->media_upload([ 'command' => 'INIT', 'media_type' => $mime_type, 'media_category' => 'tweet_video', 'total_bytes' => $size, ]); $success = $media->httpstatus >= 200 && $media->httpstatus < 300; # 2xx if (!$success) { throw new TwitterException("Failed to INIT upload for $path..."); } // APPEND chunks to upload. $mediaId = $media->media_id_string; $segmentId = 0; while (!feof($file)) { echo "chunk #$segmentId...."; $chunk = fread($file, 512 * 1024); // caps out at 512 MB echo "chunk size: ". strlen($chunk); $media = $cb->media_upload([ 'command' => 'APPEND', 'media_id' => $mediaId, 'segment_index' => $segmentId, 'media' => $chunk, ]); $success = $media->httpstatus >= 200 && $media->httpstatus < 300; # 2xx if (!$success) { throw new TwitterException("Failed to APPEND to upload for $path, chunk $segmentId..."); } $segmentId++; } // Close file and FINALIZE upload. fclose($file); echo "FINALIZING id $mediaId..."; $media = $cb->media_upload([ 'command' => 'FINALIZE', 'media_id' => $mediaId, ]); $success = $media->httpstatus >= 200 && $media->httpstatus < 300; # 2xx if (!$success) { var_dump($media); throw new TwitterException("Failed to FINALIZE upload for $path..."); } return $mediaId;Video is my ffmpeg class, which I'll paste below, and $path is a URL leading to a perfectly valid mp4 video.
Video.php:
<?php class VideoConversionException extends \Exception {} class Video { public $name; public $converted; public function __construct($name) { self::clear(); $this->name = $name; } public function convert() { $tmpVideo = 'video-' . uniqid() . uniqid() . '.mp4'; $videoPath = 'videos/' . $tmpVideo; //$ffmpeg = "ffmpeg -i https://tvcanarias.acfipress.com/BC_190907_gc_teror.mp4 -vf "scale=1280:720" -b:v 5000K -b:a 128K -r 30 -f mp4 -vcodec libx264 -acodec aac output_video.mp4"; $ffmpeg = "ffmpeg -i {$this->name} -vf \"scale=1280:720\" -b:v 5000K -minrate 5000K -maxrate 5000K -b:a 128K -r 30 -f mp4 -vcodec libx264 -profile:v high -pix_fmt yuv420p -strict -2 -ac 2 -acodec aac $videoPath"; //$ffmpeg = "ffmpeg -i {$this->name} -pix_fmt yuv420p -vcodec libx264 -vf scale=640:-1 -acodec aac -vb 1024k -minrate 1024k -maxrate 1024k -bufsize 1024k -ar 44100 -ac 2 -strict experimental -r 30 $videoPath"; $output = []; exec($ffmpeg, $output, $status); if ($status != 0) { //die("Couldnt run ffmpeg. (Error code: #$status)"); throw new VideoConversionException("Couldn't run ffmpeg. (Error code: #$status)"); } $this->converted = $tmpVideo; return $tmpVideo; } public function shredConverted() { // delete video. @unlink("videos/{$this->$converted}"); } public static function clear() { // We can't really shred videos right away as they might be still uploading. // Therefore, every time this library is used, we will just delete videos older // than, say, an hour. $files = scandir('videos'); $curtime = time(); foreach ($files as $file) { if ($file == '.gitignore' || $file == '.' || $file == '..') { continue; } $mtime = filemtime("videos/$file"); $diff = $curtime - $mtime; $overAnHour = $diff > (60 * 60); if ($overAnHour) { @unlink("videos/$file"); } } } } -
Use audio stream overs ssh with ffmpeg on web page
12 février 2020, par MauricioI need to broadcast the audio stream (WiFi camera at my home) on the website hosted on a VPS.
Here is the command executed from my home:
ffmpeg -i "rtsp://172.16.0.201:554/user=admin&password=root&channel=1&stream=1.sdp" -bufsize 24k -vn -acodec copy -f mpegts - | ssh -p 22222 root@mydomain.org 'ffmpeg -i - -vn -acodec libvorbis -ac 1 -ar 8000 -ab 64k -f mpegts "rtsp://127.0.0.1:53350/live.sdp"'It seems to work because I get
ffmpeg version n4.2.2 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.2.0 (GCC) configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-nvdec --enable-nvenc --enable-omx --enable-shared --enable-version3 libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc 55. 5.100 / 55. 5.100 ffmpeg version 4.1.4-1~deb10u1 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --prefix=/usr --extra-version='1~deb10u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil 56. 22.100 / 56. 22.100 libavcodec 58. 35.100 / 58. 35.100 libavformat 58. 20.100 / 58. 20.100 libavdevice 58. 5.100 / 58. 5.100 libavfilter 7. 40.101 / 7. 40.101 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 3.100 / 5. 3.100 libswresample 3. 3.100 / 3. 3.100 libpostproc 55. 3.100 / 55. 3.100 Guessed Channel Layout for Input Stream #0.1 : mono Input #0, rtsp, from 'rtsp://172.16.0.201:554/user=admin&password=root&channel=1&stream=1.sdp': Metadata: title : RTSP Session Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: h264 (Main), yuv420p(progressive), 640x360, 12 fps, 12 tbr, 90k tbn, 24 tbc Stream #0:1: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s [mpegts @ 0x5582b6b14c40] frame size not set Output #0, mpegts, to 'pipe:': Metadata: title : RTSP Session encoder : Lavf58.29.100 Stream #0:0: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s Stream mapping: Stream #0:1 -> #0:0 (copy) Press [q] to stop, [?] for help size= 146kB time=00:00:17.06 bitrate= 70.0kbits/s speed=1.16xBut when I look on the VPS I don't see the port open with netstat.
Yet the process seems to be running
root 21801 0.2 2.1 265916 42188 ? SLs 15:03 0:00 ffmpeg -i - -vn -acodec libvorbis -ac 1 -ar 8000 -ab 64k -f mpegts rtsp://127.0.0.1:53350/live.sdpI thought I would access the feed with a simple html page with this kind of code
iptables
Chain INPUT (policy DROP) .... ACCEPT tcp -- anywhere anywhere tcp dpt:53350 ACCEPT udp -- anywhere anywhere udp dpt:53350 .... Chain FORWARD (policy DROP) ACCEPT tcp -- anywhere anywhere tcp dpt:53350 ACCEPT udp -- anywhere anywhere udp dpt:53350 .... Chain OUTPUT (policy DROP) ACCEPT tcp -- anywhere anywhere tcp dpt:53350 ACCEPT udp -- anywhere anywhere udp dpt:53350 ....
