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• Compress video from Android before upload to server

  26 juillet 2016, par Rahul Patel

  I am working with compress video using FFmpeg library.

  selectedImagePath = getPath(selectedImage); // this is video path from gallery
  
  File dir = new File(Environment.getExternalStorageDirectory().getPath(), "MyAPP" + "/" + "Video");
  
                      if (!dir.exists()) {
  
                          dir.mkdirs();
  
                      }
  
  
  
  long time = System.currentTimeMillis();
  
  String ffmpegCode = "ffmpeg -y -i " + selectedImagePath + " -strict experimental -s 480x320 -r 25 -vcodec mpeg4 -b 900k -ab 48000 -ac 2 -ar 22050 " + dir + "/" + time + "out.mp4";

  using this code I can compress video, but if there is space between selected image path then this is not working.

  I found the below solution from this LINK.

  // Use this format to support files that contains spaces and special characters
  
   String[] complexCommand = {"ffmpeg","-y" ,"-i", selectedImagePath,"-strict","experimental","-s", "480x320","-r","25", "-vcodec", "mpeg4", "-b", "900k", "-ab","48000", "-ac", "2", "-ar", "22050", dir + "/" + time + "out.mp4"};
  
  
  
  Runtime.getRuntime().exec("chmod 744 "+dir + "/");
  
  
  
  Process p = Runtime.getRuntime().exec(complexCommand); 

  and Logcat :

  07-26 18:59:24.609 29512-29535/com.examples.ffmpeg4android_demo I/OpenGLRenderer: Initialized EGL, version 1.4
  
  07-26 18:59:24.616 29512-30045/com.examples.ffmpeg4android_demo W/System.err: java.io.IOException: Error running exec(). Command: [ffmpeg, -y, -i, /storage/emulated/0/WhatsApp/Media/WhatsApp Video/VID-20160726-WA0001.mp4, -strict, experimental, -s, 480x320, -r, 25, -vcodec, mpeg4, -b, 900k, -ab, 48000, -ac, 2, -ar, 22050, /storage/emulated/0/MyAPP/Video/1469539764559out.mp4] Working Directory: null Environment: null
  
  07-26 18:59:24.622 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.lang.ProcessManager.exec(ProcessManager.java:211)
  
  07-26 18:59:24.622 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.lang.Runtime.exec(Runtime.java:174)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.lang.Runtime.exec(Runtime.java:129)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at com.examples.ffmpeg4android.SimpleExample$TranscdingBackground1.doInBackground(SimpleExample.java:577)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at com.examples.ffmpeg4android.SimpleExample$TranscdingBackground1.doInBackground(SimpleExample.java:531)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:295)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.lang.Thread.run(Thread.java:818)
  
  07-26 18:59:24.623 29512-30045/com.examples.ffmpeg4android_demo W/System.err: Caused by: java.io.IOException: Permission denied
  
  07-26 18:59:24.624 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.lang.ProcessManager.exec(Native Method)
  
  07-26 18:59:24.624 29512-30045/com.examples.ffmpeg4android_demo W/System.err:     at java.lang.ProcessManager.exec(ProcessManager.java:209)
  
  07-26 18:59:24.624 29512-30045/com.examples.ffmpeg4android_demo W/System.err:   ... 10 more

  I already given permission android.permission.WRITE_EXTERNAL_STORAGE

  how can I compress video before upload to server like whatsapp and facebook ? Is there any other solution ?

  Please guide me.

• PHP FFMPEG match the Instagram Video Requirements

  19 février 2021, par Linesofcode

  This are the Instagram requirements in order to upload a video :

  


  - Container: MOV or MP4 (MPEG-4 Part 14), no edit lists, moov atom at the front of the file.
- Audio codec: AAC, 48khz sample rate maximum, 1 or 2 channels (mono or stereo).
- Video codec: HEVC or H264, progressive scan, closed GOP, 4:2:0 chroma subsampling.
- Frame rate: 23-60 FPS.
- Picture size:
  - Maximum columns (horizontal pixels): 1920
  - Minimum aspect ratio [cols / rows]: 4 / 5
  - Maximum aspect ratio [cols / rows]: 16 / 9
  - Video bitrate: VBR, 5Mbps maximum
- Audio bitrate: 128kbps
- Duration: 60 seconds maximum, 3 seconds minimum
- File size: 100MB maximum


  


  I'm using the https://github.com/PHP-FFMpeg/PHP-FFMpeg library and I'm able to get the metadata of the video this way :

  


  $ffprobe = \FFMpeg\FFProbe::create();
$video = $ffprobe->streams('my_sample_video.mp4')->videos()->first();
$audio = $ffprobe->streams('my_sample_video.mp4')->audios()->first();


  


  Printing $video & $audio returns respectively the following data :

  


  --- video ---
[index] => 0
[codec_name] => h264
[codec_long_name] => H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
[profile] => Baseline
[codec_type] => video
[codec_time_base] => 1/1200
[codec_tag_string] => avc1
[codec_tag] => 0x31637661
[width] => 848
[height] => 480
[coded_width] => 848
[coded_height] => 480
[has_b_frames] => 0
[sample_aspect_ratio] => 0:1
[display_aspect_ratio] => 0:1
[pix_fmt] => yuv420p
[level] => 31
[color_range] => tv
[color_space] => bt709
[color_transfer] => bt709
[color_primaries] => bt709
[chroma_location] => left
[refs] => 1
[is_avc] => 1
[nal_length_size] => 4
[r_frame_rate] => 25/1
[avg_frame_rate] => 25/1
[time_base] => 1/600
[start_pts] => 0
[start_time] => 0.000000
[duration_ts] => 57888
[duration] => 96.480000
[bit_rate] => 1436391
[bits_per_raw_sample] => 8
[nb_frames] => 2412

--- audio ---
[index] => 1
[codec_name] => aac
[codec_long_name] => AAC (Advanced Audio Coding)
[profile] => LC
[codec_type] => audio
[codec_time_base] => 1/44100
[codec_tag_string] => mp4a
[codec_tag] => 0x6134706d
[sample_fmt] => fltp
[sample_rate] => 44100
[channels] => 2
[channel_layout] => stereo
[bits_per_sample] => 0
[r_frame_rate] => 0/0
[avg_frame_rate] => 0/0
[time_base] => 1/44100
[start_pts] => 0
[start_time] => 0.000000
[duration_ts] => 4255744
[duration] => 96.502132
[bit_rate] => 62026
[max_bit_rate] => 64000
[nb_frames] => 4156


  


  Some things are easy to verify like the Video Codec, Audio Codec & Duration, but how to I manage to verify the rest ?

  


  I also noticed that all the MP4 & MOV video samples I use, the metadata of codec_long_name always returns "MPEG-4 part 10" and the requirement is "MPEG-4 Part 14".

  


• Setting up RTP on Nginx

  2 février 2021, par Swap

  I'm trying to use Janus Media Server to relay WebRTC streams to a particular RTP host/port, from where ffmpeg can pick it up as an input and convert it further to an rtmp stream, which can then be used to broadcast to various social media platforms (such as, YouTube, Twitch, Facebook, etc.)

  


  My inspiration for this has been the following blog - https://www.meetecho.com/blog/firefox-webrtc-youtube-kinda/

  


  Specifically, I'm trying to replicate the following architecture -

  


  

  


  And Janus, as per their documentation, has a very neat API for doing it -

  


  {&#xA;    "request" : "rtp_forward",&#xA;    "room" : <unique numeric="numeric" of="of" the="the" room="room" publisher="publisher" is="is" in="in">,&#xA;    "publisher_id" : <unique numeric="numeric" of="of" the="the" publisher="publisher" to="to" relay="relay" externally="externally">,&#xA;    "host" : "<host address="address" to="to" forward="forward" the="the" rtp="rtp" and="and" packets="packets">",&#xA;    "host_family" : "",&#xA;    "audio_port" : <port to="to" forward="forward" the="the" audio="audio" rtp="rtp" packets="packets">,&#xA;    "audio_ssrc" : <audio ssrc="ssrc" to="to" use="use" when="when" optional="optional">,&#xA;    "audio_pt" : <audio payload="payload" type="type" to="to" use="use" when="when" optional="optional">,&#xA;    "audio_rtcp_port" : <port to="to" contact="contact" receive="receive" audio="audio" rtcp="rtcp" feedback="feedback" from="from" the="the" and="and" currently="currently" unused="unused" for="for">,&#xA;    "video_port" : <port to="to" forward="forward" the="the" video="video" rtp="rtp" packets="packets">,&#xA;    "video_ssrc" : <video ssrc="ssrc" to="to" use="use" when="when" optional="optional">,&#xA;    "video_pt" : <video payload="payload" type="type" to="to" use="use" when="when" optional="optional">,&#xA;    "video_rtcp_port" : <port to="to" contact="contact" receive="receive" video="video" rtcp="rtcp" feedback="feedback" from="from" the="the" optional="optional">,&#xA;    "simulcast" : ,&#xA;    "video_port_2" : <if simulcasting="simulcasting" and="and" forwarding="forwarding" each="each" port="port" to="to" forward="forward" the="the" video="video" rtp="rtp" packets="packets" from="from" second="second" substream="substream"></if>layer to>,&#xA;    "video_ssrc_2" : <if simulcasting="simulcasting" and="and" forwarding="forwarding" each="each" video="video" ssrc="ssrc" to="to" use="use" the="the" second="second" substream="substream"></if>layer; optional>,&#xA;    "video_pt_2" : <if simulcasting="simulcasting" and="and" forwarding="forwarding" each="each" video="video" payload="payload" type="type" to="to" use="use" the="the" second="second" substream="substream"></if>layer; optional>,&#xA;    "video_port_3" : <if simulcasting="simulcasting" and="and" forwarding="forwarding" each="each" port="port" to="to" forward="forward" the="the" video="video" rtp="rtp" packets="packets" from="from" third="third" substream="substream"></if>layer to>,&#xA;    "video_ssrc_3" : <if simulcasting="simulcasting" and="and" forwarding="forwarding" each="each" video="video" ssrc="ssrc" to="to" use="use" the="the" third="third" substream="substream"></if>layer; optional>,&#xA;    "video_pt_3" : <if simulcasting="simulcasting" and="and" forwarding="forwarding" each="each" video="video" payload="payload" type="type" to="to" use="use" the="the" third="third" substream="substream"></if>layer; optional>,&#xA;    "data_port" : <port to="to" forward="forward" the="the" messages="messages">,&#xA;    "srtp_suite" : <length of="of" authentication="authentication" tag="tag" or="or" optional="optional">,&#xA;    "srtp_crypto" : "<key to="to" use="use" as="as" crypto="crypto" encoded="encoded" key="key" in="in" optional="optional">"&#xA;}&#xA;</key></length></port></port></video></video></port></port></audio></audio></port></host></unique></unique>

  


  For this, I've setup a Nginx server, where I've also installed Janus and everything's been running smoothly so far. But I'm quite clueless as to how to setup my Nginx server so that it accepts RTP connections (which will be forwarded as RTMP using ffmpeg).

  


  Please guide me to any relevant resources that would help me achieve this. Thanks in advance !