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Sur d’autres sites (4898)

FFMPEG : How to chose a stream from all stream

3 mars 2016, par combo_ci

I try to convert a UDP stream (that genrated from DVB signal) to HLS m3u8 file with this code :

ffmpeg -i udp://239.1.2.1:60001 -acodec aac -strict -2 -vcodec libx264 -hls_wrap 100 -f hls /var/www/html/ts/1.m3u8

UDP stream contain 1 channel (in this case IRIB-TV1).

When i run this code ffmpeg detect all of service and channel that streamed from DVB card with this message :

Input #0, mpegts, from 'udp://239.1.2.1:60001':

Duration: N/A, start: 77906.812644, bitrate: N/A

Program 101 

Metadata:

  service_name    : IRIB-TV1

  service_provider: IRIB

Stream #0:0[0x3f2]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt470bg), 720x576 [SAR 12:11 DAR 15:11], 25 fps, 50 tbr, 90k tbn, 50 tbc

Stream #0:1[0x3f3](per): Audio: aac_latm ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp

Program 102 

Metadata:

  service_name    : IRIB-TV2

  service_provider: IRIB

Program 103 

Metadata:

  service_name    : IRIB-TV3

  service_provider: IRIB

Program 104 

Metadata:

  service_name    : IRIB-TV4

  service_provider: IRIB

As you see ffmpeg finf 4 channel in UDP stream, But VLC play only channel 1(IRIB-TV1).

Now i have have 2 question :

1-Can I get all channel and service via this ffmpeg code ?

2-Can i choose a spesial stream from this ffmpeg code ?(i know that ffmpeg can choose a stream with -map otion but i want to choose other service_name that in output log)

output file is :

 ffmpeg version 2.4.3-1ubuntu1~trusty6 Copyright (c) 2000-2014 the FFmpeg developers

  built on Nov 22 2014 17:07:19 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)

  configuration: --prefix=/usr --extra-version='1ubuntu1~trusty6' --build-suffix=-ffmpeg --toolchain=hardened --extra-cflags= --extra-cxxflags= --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-fontconfig --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-opengl --enable-x11grab --enable-libxvid --enable-libx265 --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libx264 --enable-libsoxr --enable-openal --enable-libopencv

  libavutil      54.  7.100 / 54.  7.100

  libavcodec     56.  1.100 / 56.  1.100

  libavformat    56.  4.101 / 56.  4.101

  libavdevice    56.  0.100 / 56.  0.100

  libavfilter     5.  1.100 /  5.  1.100

  libavresample   2.  1.  0 /  2.  1.  0

  libswscale      3.  0.100 /  3.  0.100

  libswresample   1.  1.100 /  1.  1.100

  libpostproc    53.  0.100 / 53.  0.100

Splitting the commandline.

Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.

Reading option '-timeout' ... matched as AVOption 'timeout' with argument '6000000'.

Reading option '-i' ... matched as input file with argument 'udp://239.1.2.1:60001?fifo_size=50000'.

Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'copy'.

Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'copy'.

Reading option '-preset' ... matched as AVOption 'preset' with argument 'ultrafast'.

Reading option '-flags' ... matched as AVOption 'flags' with argument '-global_header'.

Reading option '-f' ... matched as option 'f' (force format) with argument 'hls'.

Reading option '-hls_time' ... matched as AVOption 'hls_time' with argument '20'.

Reading option '-hls_wrap' ... matched as AVOption 'hls_wrap' with argument '5'.

Reading option '/var/www/html/ts/1.m3u8' ... matched as output file.

Finished splitting the commandline.

Parsing a group of options: global .

Applying option loglevel (set logging level) with argument debug.

Successfully parsed a group of options.

Parsing a group of options: input file udp://239.1.2.1:60001?fifo_size=50000.

Successfully parsed a group of options.

Opening an input file: udp://239.1.2.1:60001?fifo_size=50000.

[udp @ 0x1967040] end receive buffer size reported is 131072

[mpegts @ 0x1977380] Format mpegts probed with size=2048 and score=100

[mpegts @ 0x1977380] stream=0 stream_type=1b pid=3f2 prog_reg_desc=

[mpegts @ 0x1977380] stream=1 stream_type=11 pid=3f3 prog_reg_desc=

[mpegts @ 0x1977380] Before avformat_find_stream_info() pos: 0 bytes read:14476 seeks:0

[mpegts @ 0x1977380] parser not found for codec none, packets or times may be invalid.

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[mpegts @ 0x1977380] probing stream 1 pp:2500

[mpegts @ 0x1977380] Probe with size=853, packets=1 detected loas with score=51

[mpegts @ 0x1977380] probed stream 1

[aac_latm @ 0x199e4e0] initializing latmctx

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] non-existing PPS 0 referenced

    Last message repeated 1 times

[h264 @ 0x199cc60] decode_slice_header error

[h264 @ 0x199cc60] no frame!

[h264 @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[h264 @ 0x199cc60] Frame num gap 397 393

[h264 @ 0x199cc60] Frame num gap 397 394

[h264 @ 0x199cc60] Frame num gap 397 395

[h264 @ 0x199cc60] mmco: unref short failure

    Last message repeated 1 times

[h264 @ 0x199cc60] number of reference frames (0+4) exceeds max (3; probably corrupt input), discarding one

[h264 @ 0x199cc60] no picture ooo

[h264 @ 0x199cc60] Increasing reorder buffer to 2

[h264 @ 0x199cc60] no picture ooo

    Last message repeated 1 times

[h264 @ 0x199cc60] no picture 

    Last message repeated 1 times

[h264 @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

    Last message repeated 3 times

[mpegts @ 0x1977380] max_analyze_duration 5000000 reached at 5034667 microseconds

[mpegts @ 0x1977380] After avformat_find_stream_info() pos: 1142476 bytes read:1143604 seeks:0 frames:397

Input #0, mpegts, from 'udp://239.1.2.1:60001?fifo_size=50000':

  Duration: N/A, start: 43581.024200, bitrate: N/A

  Program 101 

    Metadata:

      service_name    : IRIB-TV1

      service_provider: IRIB

    Stream #0:0[0x3f2], 274, 1/90000: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt470bg), 720x576 [SAR 12:11 DAR 15:11], 1/50, 25 fps, 50 tbr, 90k tbn, 50 tbc

    Stream #0:1[0x3f3](per), 123, 1/90000: Audio: aac_latm ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp

  Program 102 

    Metadata:

      service_name    : IRIB-TV2

      service_provider: IRIB

  Program 103 

    Metadata:

      service_name    : IRIB-TV3

      service_provider: IRIB

  Program 104 

    Metadata:

      service_name    : IRIB-TV4

      service_provider: IRIB

  Program 105 

    Metadata:

      service_name    : IRIB-TV5

      service_provider: IRIB

  Program 106 

    Metadata:

      service_name    : IRINN

      service_provider: IRIB

  Program 107 

    Metadata:

      service_name    : AMOOZESH

      service_provider: IRIB

  Program 108 

    Metadata:

      service_name    : QURAN

      service_provider: IRIB

  Program 119 

    Metadata:

      service_name    : SALAMAT

      service_provider: IRIB

  Program 120 

    Metadata:

      service_name    : NASIM

      service_provider: IRIB

  Program 151 

    Metadata:

      service_name    : RADIO IRAN

      service_provider: IRIB

  Program 152 

    Metadata:

      service_name    : RADIO PAYAM

      service_provider: IRIB

  Program 153 

    Metadata:

      service_name    : RADIO JAVAN

      service_provider: IRIB

  Program 154 

    Metadata:

      service_name    : RADIO MAAREF

      service_provider: IRIB

  Program 155 

    Metadata:

      service_name    : RADIO QURAN

      service_provider: IRIB

  Program 156 

    Metadata:

      service_name    : RADIO FARHANG

      service_provider: IRIB

  Program 157 

    Metadata:

      service_name    : RADIO SALAMAT

      service_provider: IRIB

  Program 158 

    Metadata:

      service_name    : RADIO VARZESH

      service_provider: IRIB

  Program 159 

    Metadata:

      service_name    : RADIO EGHTESAD

      service_provider: IRIB

  Program 160 

    Metadata:

      service_name    : RADIO TEHRAN

      service_provider: IRIB

  Program 161 

    Metadata:

      service_name    : RADIO AVAA

      service_provider: IRIB

  Program 162 

    Metadata:

      service_name    : RADIO NAMAYESH

      service_provider: IRIB

  Program 163 

    Metadata:

      service_name    : RADIO SABA

      service_provider: IRIB

  Program 164 

    Metadata:

      service_name    : English Radio World Service

      service_provider: IRIB

  Program 166 

    Metadata:

      service_name    : Arabic Radio World Service

      service_provider: IRIB

  Program 167 

    Metadata:

      service_name    : RADIO BAHARAN

      service_provider: IRIB

  Program 169 

    Metadata:

      service_name    : RADIO TELAVAT

      service_provider: IRIB

  Program 170 

    Metadata:

      service_name    : RADIO GOFTEGO

      service_provider: IRIB

Successfully opened the file.

Parsing a group of options: output file /var/www/html/ts/1.m3u8.

Applying option acodec (force audio codec ('copy' to copy stream)) with argument copy.

Applying option vcodec (force video codec ('copy' to copy stream)) with argument copy.

Applying option f (force format) with argument hls.

Successfully parsed a group of options.

Opening an output file: /var/www/html/ts/1.m3u8.

Successfully opened the file.

[mpegts @ 0x1967180] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.

    Last message repeated 1 times

[mpegts @ 0x1967180] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts

Output #0, hls, to '/var/www/html/ts/1.m3u8':

  Metadata:

    encoder         : Lavf56.4.101

    Stream #0:0, 0, 1/90000: Video: h264 ([27][0][0][0] / 0x001B), yuv420p, 720x576 [SAR 12:11 DAR 15:11], 1/25, q=2-31, 25 fps, 90k tbn, 25 tbc

    Stream #0:1(per), 0, 1/90000: Audio: aac_latm ([17][0][0][0] / 0x0011), 48000 Hz, stereo

Stream mapping:

  Stream #0:0 -> #0:0 (copy)

  Stream #0:1 -> #0:1 (copy)

Press [q] to stop, [?] for help

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping

[AVIOContext @ 0x19a9860] Statistics: 0 seeks, 896 writeouts=N/A    

[hls @ 0x1a65ca0] EXT-X-MEDIA-SEQUENCE:0

[AVIOContext @ 0x1d162e0] Statistics: 0 seeks, 1 writeouts

[AVIOContext @ 0x1966b40] Statistics: 0 seeks, 27 writeouts

[hls @ 0x1a65ca0] EXT-X-MEDIA-SEQUENCE:0

[AVIOContext @ 0x199b7a0] Statistics: 0 seeks, 1 writeouts

frame=  826 fps= 69 q=-1.0 Lsize=N/A time=00:00:20.63 bitrate=N/A    

video:2611kB audio:68kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Input file #0 (udp://239.1.2.1:60001?fifo_size=50000):

  Input stream #0:0 (video): 872 packets read (2779202 bytes); 

  Input stream #0:1 (audio): 405 packets read (69222 bytes); 

  Total: 1277 packets (2848424 bytes) demuxed

Output file #0 (/var/www/html/ts/1.m3u8):

  Output stream #0:0 (video): 826 packets muxed (2673485 bytes); 

  Output stream #0:1 (audio): 405 packets muxed (69222 bytes); 

  Total: 1231 packets (2742707 bytes) muxed

0 frames successfully decoded, 0 decoding errors

[AVIOContext @ 0x1967ce0] Statistics: 3884832 bytes read, 0 seeks

Received signal 2: terminating.

Chrome’s New Audio Notifier

30 janvier 2014, par Multimedia Mike — General
Version 32 of Google’s Chrome web browser introduced this nifty feature :

When a browser tab has an element that is producing audio, the browser’s tab shows the above audio notification icon to inform the user. I have seen that people have a few questions about this, specifically :
1. How does this feature work ?
2. Why wasn’t this done sooner ?
3. Are other browsers going to follow suit ?
Short answers : 1) Chrome offers a new plugin API that the Flash Player is now using, as are Chrome’s internal media playing facilities ; 2) this feature was contingent on the new plugin infrastructure mentioned in the previous answer ; 3) other browsers would require the same infrastructure support.

Longer answers follow…

Plugin History
Plugins were originally based on the Netscape Plugin API. This was developed in the early 1990s in order to support embedding PDFs into the Netscape web browser. The NPAPI does things like providing graphics contexts for drawing and input processing, and mediate network requests through the browser’s network facilities.

What NPAPI doesn’t do is handle audio. In the early-mid 1990s, audio support was not a widespread consideration in the consumer PC arena. Due to the lack of audio API support, if a plugin wanted to play audio, it had to go outside of the plugin framework.

There are a few downsides to this approach :
- If a plugin wants to play audio, it needs to access unique audio APIs on each supported platform. One of the most famous things I’ve ever written deals concerns this nightmare on Linux. (The picture worth a thousand words.)
- Plugin necessarily needs free unrestricted access to system facilities, i.e., security measures like sandboxing become more difficult without restricting functionality.
- Since the browser doesn’t mediate access to the audio APIs, the browser can’t reasonably be expected to know when a plugin is accessing the audio resources.
So that last item hopefully answers the question of why it has been so difficult for NPAPI-supporting browsers to implement what seems like it would be simple functionality, like implementing a per-tab audio notifier.

Plugin Future
Since Google released Chrome in an effort to facilitate advancements on the client side of the internet, they have made numerous efforts to modernize various legacy aspects of web technology. These efforts include the SPDY protocol, Native Client, WebM/WebP, and something call the Pepper Plugin API (PPAPI). This is a more modern take on the classic plugin architecture to supplant the aging NPAPI :

Right away, we see that the job of the plugin writer is greatly simplified. Where was this API years ago when I was writing my API jungle piece ?

The Linux version of Chrome was apparently the first version that packaged the Pepper version of the Flash Player (doing so fixed an obnoxious bug in the Linux Flash Player interaction with GTK). Now, it looks like Windows and Mac have followed suit. Digging into the Chrome directory on a Windows 7 installation :

AppData\Local\Google\Chrome\Application[version]\PepperFlash\pepflashplayer.dll

This directory exists for version 31 as well, which is still hanging around my system.

So, to re-iterate : Chrome has a new plugin API that plugins use to access the audio API. Chrome knows when the API is accessed and that allows the browser to display the audio notifier on a tab.

Other Browsers
What about other browsers ? “Mozilla is not interested in or working on Pepper at this time. See the Chrome Pepper pages.”
ffmpeg android concatenation with different codec [on hold]

31 mars 2016, par raphwilmes
I’m trying to concatenate 10 videos, but 5 of them have
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 600x976 [SAR 1:1 DAR 75:122], 17 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)

And the rest have
Stream #1:0(eng) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480x 175 kb/s, SAR 65536:65536 DAR 4:3, 7.69frp, 23.08 tbr, 90k tbn, 15tbc (default)

And my code is :
```
String commandForMerge = "";

for(int i = 1; i&lt;=numberQuestion;i++){

    commandForMerge += "-i "+toDir+"/image"+i+".mp4 -i "+toDir+"/"+i+".mp4 ";

}

String cmd = commandForMerge+"-filter_complex concat=n=10:v=1:a=1 -y "+toDir+"/input.mp4";

execFFmpegBinaryMerge(cmd);
```
Here my fonction :
```
private void execFFmpegBinaryMerge(final String command) {

    try {



        ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {

            @Override

            public void onFailure(String s) {

            }



            @Override

            public void onSuccess(String s) {

            }



            @Override

            public void onProgress(String s) {

                txtProcess.setText(txtProcess.getText()+"\n "+s.toString());

            }



            @Override

            public void onStart() {

                txtProcess.setText("mise en place...");

            }



            @Override

            public void onFinish() {



            }

        });

    } catch (FFmpegCommandAlreadyRunningException e) {

        // do nothing for now

    }

}
```
I use this library : https://github.com/WritingMinds/ffmpeg-android-java

Edit :

Now, I’v this : Unable to find a suitable output format for ’[1:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v1] ;’ Invalid Agurment

My Command is : *ffmpeg -i image1.mp4 -i 1.mp4 -i image2.mp4 -i 2.mp4 -i image3.mp4 -i 3.mp4.mp4 -i image4.mp4 -i 4.mp4 -i image5.mp4 -i .mp4

filter-complex
"[0:v]scale=-1:480,pad=640:0 :(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v0] ;
[1:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v1] ;
[2:v]scale=-1:480,pad=640:0 :(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v2] ;
[3:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v3] ;
[4:v]scale=-1:480,pad=640:0 :(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v4] ;
[5:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v5] ;
[6:v]scale=-1:480,pad=640:0 :(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v6] ;
[7:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v7] ;
[8:v]scale=-1:480,pad=640:0 :(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v8] ;
[9:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v9] ;"
’[v0][0:a][v1][1:a][v2][2:a][v3][3:a][v4][4:a][v5][5:a][v6][6:a][v7][7:a][v8][8:a][v9][9:a]’ concat=n=10:v=1:a=1 -y output.mp4
*

Now the "[0:v]scale=-1:480,pad=640:0 :(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v0] ;" pass but not the [1:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v1] ;

output :

WARINING:linker : /data/data/vrapp_mobile.com.duoquiz2/files/ffmpeg has text relocation. This is wasting memory and is security risk. Please fix.
ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developpers built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
configuration :—target-os=linux —cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- —arm=arm —cpu=cortex-a8 —enable-runtime-cpudetect —sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot —enable-pic—enable-libx264 —enable-libass —enable-libfreetype —enable-libfrididi —enable-fontconfig —enable-pthreads —disable-debug —disable-ffserver —enable-version3 —enable-hardcored-tables —disable-ffplay —disable-ffprobe —enable-gpl —enable-yasm —disable-doc —disable-shared —enable-static —pjg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config —prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon —extra-cflags=’-l/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protextor-all -mfpu=neon’ —extra-ldflags=’-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,now -pie’ —extra-libs=’-lpng -lexpat -lm’ —extra-cxxflags =
libavutil 54. 7.100/54. 7.100
libavcodec 56 1.100/56. 1.100
libavformat 56. 4.101/56. 4.101
libavdevice 56. 0.100/56. 0.100
libavfilter 5. 1.100/5. 1.100
libswscale 3. 0.100/3. 0.100
libswresample 1. 1.100/1. 1.100
libpostproc 53. 0.100/53. 0.100
Input #0,mov,mp4,m4a,3gp,mj2, from ’/storage/emulated/0/DuoQuiz/image1.mp4’ :
Metadata :
major_brand :isom
minor_version :512
compatible_brands:isomiso2avc1mp41
encoder :Lavf56.4.101
Duration : 00:00:02.40, start : 0.023021 , bitrate : 334 kb/s
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 600x976 [SAR 1:1 DAR 75:122], 17 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata :
handler_name : VideoHandler
Stream #0:1(und) : Audio.mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, s16p, 320 kb/s (default)
Metadata :
handler_name :SoundHandler
Input #1,mov,mp4,m4a,3gp,3g2,mj2, from ’/storage/emulated/0/DuoQuiz/1.mp4’ :
Metadata :
major_brand :isom
minor_version :0
compatible_brands:isom3gp4
creation_time :2016-03-21 16:05:25
Duration : 00:00:02.73, start : 0.000000, bitrate : 229 kb/s
Stream #1:0(eng) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480x 175 kb/s, SAR 65536:65536 DAR 4:3, 7.69frp, 23.08 tbr, 90k tbn, 15tbc (default)
Metadata :
rotate :270
creation_time :2016-03-21 16:05:25
handler_name :VideoHandle
Side data :
displaymatrix : rotation of 90.00 degrees
Stream #1:1(eng) : Audio : aac (mp4a / 0x6134706D),44100 Hz, mono, fltp, 49 kb/s (default)
Metadata :
creation_time :2016-03-21 16:05:25
handler_name :SoundHandle
Input #2,mov,mp4,m4a,3gp,mj2, from ’/storage/emulated/0/DuoQuiz/image2.mp4’ :
Metadata :
major_brand :isom
minor_version :512
compatible_brands:isomiso2avc1mp41
encoder :Lavf56.4.101
Duration : 00:00:02.40, start : 0.023021 , bitrate : 334 kb/s
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 600x976 [SAR 1:1 DAR 75:122], 17 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata :
handler_name : VideoHandler
Stream #0:1(und) : Audio.mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, s16p, 320 kb/s (default)
Metadata :
handler_name :SoundHandler
Input #3,mov,mp4,m4a,3gp,3g2,mj2, from ’/storage/emulated/0/DuoQuiz/2.mp4’ :
Metadata :
major_brand :isom
minor_version :0
compatible_brands:isom3gp4
creation_time :2016-03-21 16:05:25
Duration : 00:00:02.73, start : 0.000000, bitrate : 229 kb/s
Stream #1:0(eng) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480x 175 kb/s, SAR 65536:65536 DAR 4:3, 7.69frp, 23.08 tbr, 90k tbn, 15tbc (default)
Metadata :
rotate :270
creation_time :2016-03-21 16:05:25
handler_name :VideoHandle
Side data :
displaymatrix : rotation of 90.00 degrees
Stream #1:1(eng) : Audio : aac (mp4a / 0x6134706D),44100 Hz, mono, fltp, 49 kb/s (default)
Metadata :
creation_time :2016-03-21 16:05:25
handler_name :SoundHandle
Input #4,mov,mp4,m4a,3gp,mj2, from ’/storage/emulated/0/DuoQuiz/image3.mp4’ :
Metadata :
major_brand :isom
minor_version :512
compatible_brands:isomiso2avc1mp41
encoder :Lavf56.4.101
Duration : 00:00:02.40, start : 0.023021 , bitrate : 334 kb/s
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 600x976 [SAR 1:1 DAR 75:122], 17 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata :
handler_name : VideoHandler
Stream #0:1(und) : Audio.mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, s16p, 320 kb/s (default)
Metadata :
handler_name :SoundHandler
Input #5,mov,mp4,m4a,3gp,3g2,mj2, from ’/storage/emulated/0/DuoQuiz/3.mp4’ :
Metadata :
major_brand :isom
minor_version :0
compatible_brands:isom3gp4
creation_time :2016-03-21
Duration : 00:00:02.73, start : 0.000000, bitrate : 229 kb/s
Stream #1:0(eng) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480x 175 kb/s, SAR 65536:65536 DAR 4:3, 7.69frp, 23.08 tbr, 90k tbn, 15tbc (default)
Metadata :
rotate :270
creation_time :2016-03-2116:05:25
handler_name :VideoHandle
Side data :
displaymatrix : rotation of 90.00 degrees
Stream #1:1(eng) : Audio : aac (mp4a / 0x6134706D),44100 Hz, mono, fltp, 49 kb/s (default)
Metadata :
creation_time :2016-03-21 16:05:25
handler_name :SoundHandle
Input #6,mov,mp4,m4a,3gp,mj2, from ’/storage/emulated/0/DuoQuiz/image4.mp4’ :
Metadata :
major_brand :isom
minor_version :512
compatible_brands:isomiso2avc1mp41
encoder :Lavf56.4.101
Duration : 00:00:02.40, start : 0.023021 , bitrate : 334 kb/s
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 600x976 [SAR 1:1 DAR 75:122], 17 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata :
handler_name : VideoHandler
Stream #0:1(und) : Audio.mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, s16p, 320 kb/s (default)
Metadata :
handler_name :SoundHandler
Input #7,mov,mp4,m4a,3gp,3g2,mj2, from ’/storage/emulated/0/DuoQuiz/4.mp4’ :
Metadata :
major_brand :isom
minor_version :0
compatible_brands:isom3gp4
creation_time :2016-03-21
Duration : 00:00:02.73, start : 0.000000, bitrate : 229 kb/s
Stream #1:0(eng) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480x 175 kb/s, SAR 65536:65536 DAR 4:3, 7.69frp, 23.08 tbr, 90k tbn, 15tbc (default)
Metadata :
rotate :270
creation_time :2016-03-2116:05:25
handler_name :VideoHandle
Side data :
displaymatrix : rotation of 90.00 degrees
Stream #1:1(eng) : Audio : aac (mp4a / 0x6134706D),44100 Hz, mono, fltp, 49 kb/s (default)
Metadata :
creation_time :2016-03-21 16:05:25
handler_name :SoundHandle
Input #8,mov,mp4,m4a,3gp,mj2, from ’/storage/emulated/0/DuoQuiz/image5.mp4’ :
Metadata :
major_brand :isom
minor_version :512
compatible_brands:isomiso2avc1mp41
encoder :Lavf56.4.101
Duration : 00:00:02.40, start : 0.023021 , bitrate : 334 kb/s
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 600x976 [SAR 1:1 DAR 75:122], 17 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata :
handler_name : VideoHandler
Stream #0:1(und) : Audio.mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, s16p, 320 kb/s (default)
Metadata :
handler_name :SoundHandler
Input #9,mov,mp4,m4a,3gp,3g2,mj2, from ’/storage/emulated/0/DuoQuiz/5.mp4’ :
Metadata :
major_brand :isom
minor_version :0
compatible_brands:isom3gp4
creation_time :2016-03-21
Duration : 00:00:02.73, start : 0.000000, bitrate : 229 kb/s
Stream #1:0(eng) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480x 175 kb/s, SAR 65536:65536 DAR 4:3, 7.69frp, 23.08 tbr, 90k tbn, 15tbc (default)
Metadata :
rotate :270
creation_time :2016-03-2116:05:25
handler_name :VideoHandle
Side data :
displaymatrix : rotation of 90.00 degrees
Stream #1:1(eng) : Audio : aac (mp4a / 0x6134706D),44100 Hz, mono, fltp, 49 kb/s (default)
Metadata :
creation_time :2016-03-21 16:05:25
handler_name :SoundHandle
[AVFilterGraph @ 0x2b5b2e10] No such filter : ""
Error configuring filter
*

On my computer, i try this command :
```
-i image1.mp4 -i 1.mp4 -i image2.mp4 -i 2.mp4 -i image3.mp4 -i 3.mp4 -i image4.mp4 -i 4.mp4 -i image5.mp4 -i 5.mp4 -filter_complex "[0:v]scale=-1:480,pad=640:0:(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v0]; [1:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v1]; [2:v]scale=-1:480,pad=640:0:(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v2]; [3:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v3]; [4:v]scale=-1:480,pad=640:0:(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v4]; [5:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v5]; [6:v]scale=-1:480,pad=640:0:(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v6]; [7:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v7]; [8:v]scale=-1:480,pad=640:0:(ow-iw)/2,setsar=1,setpts=PTS-STARTPTS[v8]; [9:v]fps=25,setsar=1,setpts=PTS-STARTPTS[v9]; [v0][0:a][v1][1:a][v2][2:a][v3][3:a][v4][4:a][v5][5:a][v6][6:a][v7][7:a][v8][8:a][v9][9:a] concat=n=10:v=1:a=1" -y output.mp4 
```
That’s ok on my PC but not on my Android