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• How to watch or download periscope live streams from start?

  10 September 2019, by Sanchit

  I am trying to figure how watch/download a periscope livestream from it’s starting point. The app doesn’t let go back more than 2 minutes so I tried downloading as someone told me it downloads from beginning but it didn’t. It started from the current time.

  I tried running :

  youtube-dl https://www.pscp.tv/w/b_7KWDFyYVFaeFhCTXhaanp8MXluS09Sd05QRFZ4Uuj5klcOLvuiNqQPC2PcorcMlZOwD3uZyIP7o-UXVYNi

  I get

  https://prod-fastly-ap-south-1.video.periscope.tv/Transcoding/v1/-/chunk_1563350917969725824_36817_a.ts?type=live
  
  
  
  https://prod-fastly-ap-south-1.video.periscope.tv/Transcoding/v1/-/chunk_1563350926386273572_36818_a.ts?type=live

• FFmpeg concat with watermarks and audio "stream specifier in filtergraph description matches no streams."

  28 March 2016, by btalbot

  I’m trying to concatenate an arbitrary number of videos with a series of watermarks over them:

  ffmpeg -i segment0.mp4 -i segment1.mp4 -i ... segmentn.mp4 -i end.mp4 -i ../../watermark/watermark1280/watermark_%05d.png -filter_complex "[0:v][1:v]...[n:v]concat=n=n:v=1:a=0 [v], [v] overlay [p]" -map "[v]" -an -y output.mp4

  I am getting the following error:

  Stream specifier ':v' in filtergraph description [0:v][1:v]...[n:v]concat=n=n:v=1:a=0 [v], [v] overlay [p] matches no streams.

  Here is the full output of my latest attempt:

  ffmpeg version N-78734-g666e2ed Copyright (c) 2000-2016 the FFmpeg developers
 built with gcc 5.3.0 (GCC)
 configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
 libavutil      55. 19.100 / 55. 19.100
 libavcodec     57. 25.101 / 57. 25.101
 libavformat    57. 26.100 / 57. 26.100
 libavdevice    57.  0.101 / 57.  0.101
 libavfilter     6. 36.100 /  6. 36.100
 libswscale      4.  0.100 /  4.  0.100
 libswresample   2.  0.101 /  2.  0.101
 libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'segment0.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.26.100
 Duration: 00:00:02.01, start: 0.010000, bitrate: 6 kb/s
   Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 2 kb/s (default)
   Metadata:
     handler_name    : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'segment1.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.26.100
 Duration: 00:00:01.99, start: 0.066000, bitrate: 5014 kb/s
   Stream #1:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv), 1280x720, 5008 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
   Metadata:
     handler_name    : VideoHandler
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'segment2.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.26.100
 Duration: 00:00:02.01, start: 0.009000, bitrate: 424 kb/s
   Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 1111 kb/s, 59 fps, 59 tbr, 15104 tbn, 118 tbc (default)
   Metadata:
     handler_name    : VideoHandler
   Stream #2:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 2 kb/s (default)
   Metadata:
     handler_name    : SoundHandler
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from 'segment3.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.26.100
 Duration: 00:00:01.85, start: 0.205000, bitrate: 5058 kb/s
   Stream #3:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv), 1280x720, 5050 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
   Metadata:
     handler_name    : VideoHandler
Input #4, mov,mp4,m4a,3gp,3g2,mj2, from 'segment4.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.26.100
 Duration: 00:00:01.77, start: 0.282000, bitrate: 5174 kb/s
   Stream #4:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv), 1280x720, 5167 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
   Metadata:
     handler_name    : VideoHandler
Input #5, mov,mp4,m4a,3gp,3g2,mj2, from 'segment5.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.26.100
 Duration: 00:00:02.01, start: 0.006000, bitrate: 955 kb/s
   Stream #5:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 1448 kb/s, 59 fps, 59 tbr, 15104 tbn, 118 tbc (default)
   Metadata:
     handler_name    : VideoHandler
   Stream #5:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 2 kb/s (default)
   Metadata:
     handler_name    : SoundHandler
Input #6, mov,mp4,m4a,3gp,3g2,mj2, from '../../slate/Void_test.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.26.100
 Duration: 00:00:02.97, start: 0.000000, bitrate: 3176 kb/s
   Stream #6:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 3169 kb/s, 59.94 fps, 59.94 tbr, 11988 tbn, 119.88 tbc (default)
   Metadata:
     handler_name    : VideoHandler
Input #7, image2, from '../../watermark/watermark1280/watermark_%05d.png':
 Duration: 00:00:14.40, start: 0.000000, bitrate: N/A
   Stream #7:0: Video: png, ya8(pc), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream specifier ':v' in filtergraph description [0:v][1:v][2:v][3:v][4:v][5:v][6:v]concat=n=7:v=1:a=0 [v], [v] overlay [p] matches no streams.

  Also, if someone can help me do this with a single mp3 audio input over the whole concatenated video, that’d be helpful, too.

• how can water mark video streaming on the fly

  24 June 2019, by Mohsen Rahnamaei

  I want to write something like watermark video in dynamic mode . with nginx and hls. how can I do this without storing a static file?
  means I want to be middleware between ts files and nginx . and when client request ts file i want to watermark on the fly.
  actually now I developed hls server with nginx and make all of my video ts files with ffmpeg . and prepare m3u8 file.