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• Enable armv6 FFmpeg crashed under Android NDK

  3 janvier 2014, par Tim Ding

  I compile the FFmpeg under the armv5, it can work well on Android NDK r5, but I compile the FFmpeg under the armv6, it can success, but when I call the function av_new_stream, it is crashed, and it is crashed on the libavutil.c/rational.c :

  if(num<=max && den<=max){
  
      a1= (AVRational){num, den};
  
      den=0;
  
  }

  Dose anyone encounter this problem ?

  The LOCAL_FLAGS
  
  include $(CLEAR_VARS)
  
  LOCAL_ARM_MODE := arm
  
  LOCAL_MODULE    := ffmpeg
  
  LOCAL_CFLAGS := -DHAVE_AV_CONFIG_H  -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC  -std=gnu99 -march=armv6

  Is there something error here ?

• The use cases for a element in HTML

  1er janvier 2014, par silvia

  The W3C HTML WG and the WHATWG are currently discussing the introduction of a <main> element into HTML.

  The <main> element has been proposed by Steve Faulkner and is specified in a draft extension spec which is about to be accepted as a FPWD (first public working draft) by the W3C HTML WG. This implies that the W3C HTML WG will be looking for implementations and for feedback by implementers on this spec.

  I am supportive of the introduction of a <main> element into HTML. However, I believe that the current spec and use case list don’t make a good enough case for its introduction. Here are my thoughts.

  Main use case : accessibility

  In my opinion, the main use case for the introduction of <main> is accessibility.

  Like any other users, when blind users want to perceive a Web page/application, they need to have a quick means of grasping the content of a page. Since they cannot visually scan the layout and thus determine where the main content is, they use accessibility technology (AT) to find what is known as “landmarks”.

  “Landmarks” tell the user what semantic content is on a page : a header (such as a banner), a search box, a navigation menu, some asides (also called complementary content), a footer, …. and the most important part : the main content of the page. It is this main content that a blind user most often wants to skip to directly.

  In the days of HTML4, a hidden “skip to content” link at the beginning of the Web page was used as a means to help blind users access the main content.

  In the days of ARIA, the aria @role=main enables authors to avoid a hidden link and instead mark the element where the main content begins to allow direct access to the main content. This attribute is supported by AT – in particular screen readers – by making it part of the landmarks that AT can directly skip to.

  Both the hidden link and the ARIA @role=main approaches are, however, band aids : they are being used by those of us that make “finished” Web pages accessible by adding specific extra markup.

  A world where ARIA is not necessary and where accessibility developers would be out of a job because the normal markup that everyone writes already creates accessible Web sites/applications would be much preferable over the current world of band-aids.

  Therefore, to me, the primary use case for a <main> element is to achieve exactly this better world and not require specialized markup to tell a user (or a tool) where the main content on a page starts.

  An immediate effect would be that pages that have a <main> element will expose a “main” landmark to blind and vision-impaired users that will enable them to directly access that main content on the page without having to wade through other text on the page. Without a <main> element, this functionality can currently only be provided using heuristics to skip other semantic and structural elements and is for this reason not typically implemented in AT.

  Other use cases

  The <main> element is a semantic element not unlike other new semantic elements such as <header>, <footer>, <aside>, <article>, <nav>, or <section>. Thus, it can also serve other uses where the main content on a Web page/Web application needs to be identified.

  Data mining

  For data mining of Web content, the identification of the main content is one of the key challenges. Many scholarly articles have been published on this topic. This stackoverflow article references and suggests a multitude of approaches, but the accepted answer says “there’s no way to do this that’s guaranteed to work”. This is because Web pages are inherently complex and many <div>, <p>, <iframe> and other elements are used to provide markup for styling, notifications, ads, analytics and other use cases that are necessary to make a Web page complete, but don’t contribute to what a user consumes as semantically rich content. A <main> element will allow authors to pro-actively direct data mining tools to the main content.

  Search engines

  One particularly important “data mining” tool are search engines. They, too, have a hard time to identify which sections of a Web page are more important than others and employ many heuristics to do so, see e.g. this ACM article. Yet, they still disappoint with poor results pointing to findings of keywords in little relevant sections of a page rather than ranking Web pages higher where the keywords turn up in the main content area. A <main> element would be able to help search engines give text in main content areas a higher weight and prefer them over other areas of the Web page. It would be able to rank different Web pages depending on where on the page the search words are found. The <main> element will be an additional hint that search engines will digest.

  Visual focus

  On small devices, the display of Web pages designed for Desktop often causes confusion as to where the main content can be found and read, in particular when the text ends up being too small to be readable. It would be nice if browsers on small devices had a functionality (maybe a default setting) where Web pages would start being displayed as zoomed in on the main content. This could alleviate some of the headaches of responsive Web design, where the recommendation is to show high priority content as the first content. Right now this problem is addressed through stylesheets that re-layout the page differently depending on device, but again this is a band-aid solution. Explicit semantic markup of the main content can solve this problem more elegantly.

  Styling

  Finally, naturally, <main> would also be used to style the main content differently from others. You can e.g. replace a semantically meaningless <div id=”main”> with a semantically meaningful <main> where their position is identical. My analysis below shows, that this is not always the case, since oftentimes <div id=”main”> is used to group everything together that is not the header – in particular where there are multiple columns. Thus, the ease of styling a <main> element is only a positive side effect and not actually a real use case. It does make it easier, however, to adapt the style of the main content e.g. with media queries.

  Proposed alternative solutions

  It has been proposed that existing markup serves to satisfy the use cases that <main> has been proposed for. Let’s analyse these on some of the most popular Web sites. First let’s list the propsed algorithms.

  Proposed solution No 1 : Scooby-Doo

  On Sat, Nov 17, 2012 at 11:01 AM, Ian Hickson <ian@hixie.ch> wrote :
  | The main content is whatever content isn’t
  | marked up as not being main content (anything not marked up with <header>,
  | <aside>, <nav>, etc).
  

  This implies that the first element that is not a <header>, <aside>, <nav>, or <footer> will be the element that we want to give to a blind user as the location where they should start reading. The algorithm is implemented in https://gist.github.com/4032962.

  Proposed solution No 2 : First article element

  On Sat, Nov 17, 2012 at 8:01 AM, Ian Hickson  wrote :
  | On Thu, 15 Nov 2012, Ian Yang wrote :
  | >
  | > That’s a good idea. We really need an element to wrap all the <p>s,
  | > <ul>s, <ol>s, <figure>s, <table>s ... etc of a blog post.
  |
  | That’s called <article>.
  

  This approach identifies the first <article> element on the page as containing the main content. Here’s the algorithm for this approach.

  Proposed solution No 3 : An example heuristic approach

  The readability plugin has been developed to make Web pages readable by essentially removing all the non-main content from a page. An early source of readability is available. This demonstrates what a heuristic approach can perform.

  Analysing alternative solutions

  Comparison

  I’ve picked 4 typical Websites (top on Alexa) to analyse how these three different approaches fare. Ideally, I’d like to simply apply the above three scripts and compare pictures. However, since the semantic HTML5 elements <header>, <aside>, <nav>, and <footer> are not actually used by any of these Web sites, I don’t actually have this choice.

  So, instead, I decided to make some assumptions of where these semantic elements would be used and what the outcome of applying the first two algorithms would be. I can then compare it to the third, which is a product so we can take screenshots.

  Google.com

  http://google.com – search for “Scooby Doo”.

  The search results page would likely be built with :

  • a <nav> menu for the Google bar
  • a <header> for the search bar
  • another <header> for the login section
  • another <nav> menu for the search types
  • a <div> to contain the rest of the page
  • a <div> for the app bar with the search number
  • a few <aside>s for the left and right column
  • a set of <article>s for the search results

  “Scooby Doo” would find the first element after the headers as the “main content”. This is the element before the app bar in this case. Interestingly, there is a <div @id=main> already in the current Google results page, which “Scooby Doo” would likely also pick. However, there are a nav bar and two asides in this div, which clearly should not be part of the “main content”. Google actually placed a @role=main on a different element, namely the one that encapsulates all the search results.

  “First Article” would find the first search result as the “main content”. While not quite the same as what Google intended – namely all search results – it is close enough to be useful.

  The “readability” result is interesting, since it is not able to identify the main text on the page. It is actually aware of this problem and brings a warning before displaying this page :

  

  Facebook.com

  https://facebook.com

  A user page would likely be built with :

  • a <header> bar for the search and login bar
  • a <div> to contain the rest of the page
  • an <aside> for the left column
  • a <div> to contain the center and right column
  • an <aside> for the right column
  • a <header> to contain the center column “megaphone”
  • a <div> for the status posting
  • a set of <article>s for the home stream

  “Scooby Doo” would find the first element after the headers as the “main content”. This is the element that contains all three columns. It’s actually a <div @id=content> already in the current Facebook user page, which “Scooby Doo” would likely also pick. However, Facebook selected a different element to place the @role=main : the center column.

  “First Article” would find the first news item in the home stream. This is clearly not what Facebook intended, since they placed the @role=main on the center column, above the first blog post’s title. “First Article” would miss that title and the status posting.

  The “readability” result again disappoints but warns that it failed :

  

  YouTube.com

  http://youtube.com

  A video page would likely be built with :

  • a <header> bar for the search and login bar
  • a <nav> for the menu
  • a <div> to contain the rest of the page
  • a <header> for the video title and channel links
  • a <div> to contain the video with controls
  • a <div> to contain the center and right column
  • an <aside> for the right column with an <article> per related video
  • an <aside> for the information below the video
  • a <article> per comment below the video

  “Scooby Doo” would find the first element after the headers as the “main content”. This is the element that contains the rest of the page. It’s actually a <div @id=content> already in the current YouTube video page, which “Scooby Doo” would likely also pick. However, YouTube’s related videos and comments are unlikely to be what the user would regard as “main content” – it’s the video they are after, which generously has a <div id=watch-player>.

  “First Article” would find the first related video or comment in the home stream. This is clearly not what YouTube intends.

  The “readability” result is not quite as unusable, but still very bare :

  

  Wikipedia.com

  http://wikipedia.com (“Overscan” page)

  A Wikipedia page would likely be built with :

  • a <header> bar for the search, login and menu items
  • a <div> to contain the rest of the page
  • an &ls ; article> with title and lots of text
  • <article> an <aside> with the table of contents
  • several <aside>s for the left column

  Good news : “Scooby Doo” would find the first element after the headers as the “main content”. This is the element that contains the rest of the page. It’s actually a <div id=”content” role=”main”> element on Wikipedia, which “Scooby Doo” would likely also pick.

  “First Article” would find the title and text of the main element on the page, but it would also include an <aside>.

  The “readability” result is also in agreement.

  

  Results

  In the following table we have summarised the results for the experiments :

  Site	Scooby-Doo	First article	Readability
  Google.com	FAIL	SUCCESS	FAIL
  Facebook.com	FAIL	FAIL	FAIL
  YouTube.com	FAIL	FAIL	FAIL
  Wikipedia.com	SUCCESS	SUCCESS	SUCCESS

  Clearly, Wikipedia is the prime example of a site where even the simple approaches find it easy to determine the main content on the page. WordPress blogs are similarly successful. Almost any other site, including news sites, social networks and search engine sites are petty hopeless with the proposed approaches, because there are too many elements that are used for layout or other purposes (notifications, hidden areas) such that the pre-determined list of semantic elements that are available simply don’t suffice to mark up a Web page/application completely.

  Conclusion

  It seems that in general it is impossible to determine which element(s) on a Web page should be the “main” piece of content that accessibility tools jump to when requested, that a search engine should put their focus on, or that should be highlighted to a general user to read. It would be very useful if the author of the Web page would provide a hint through a <main> element where that main content is to be found.

  I think that the <main> element becomes particularly useful when combined with a default keyboard shortcut in browsers as proposed by Steve : we may actually find that non-accessibility users will also start making use of this shortcut, e.g. to get to videos on YouTube pages directly without having to tab over search boxes and other interactive elements, etc. Worthwhile markup indeed.

• keepalive type and frequency in ffmpeg [on hold]

  19 novembre 2013, par Jack Simth

  My company has a bunch of IP cameras that we distribute - specifically Grandstream - and the manufacturer has changed their firmware. The normal keepalive that ffmpeg uses for the rtsp streams ( either ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL) ; or ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL) ; both in in libavformat/rtspdec.c) is no longer working, for two reasons :

  1) The new Grandstream firmware is now checking for a receiver report to determine whether or not the program reading the stream is live, not just anything.

  2) The new Grandstream firmware requires that the receiver report to keep the connection alive happen at least once every 25 seconds, and on the audio stream it is currently only happening about every 30 seconds or so (video is getting it every 7 seconds or so).

  So after about a minute with ffmpeg connected, the camera stops sending the audio stream, the audio stream on ffmpeg reads end-of-file, and then ffmpeg shuts everything down.

  As I can't change the firmware, I'm trying to dig through the ffmpeg code to make it send the appropriate receiver report for the keep alive... but I am getting nowhere. I've added a little snippet of code into the receiver reports so I know when they're running when I call ffmpeg on debug, but... well, it's not going well.

  Test command :
  ffmpeg -loglevel debug -i rtsp ://admin:admin@192.168.4.3:554/0 -acodec libmp3lame -ar 22050 -vcodec copy -y -f flv /dev/null &> test.txt

  Test output :

  `[root@localhost ffmpeg]# cat test.txt
  
  ffmpeg version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Aug 21 2013 14:24:28 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-3)
  
    configuration: --datadir=/usr/share/ffmpeg --bindir=/usr/local/bin --libdir=/usr/local/lib --incdir=/usr/local/include --shlibdir=/usr/lib --mandir=/usr/share/man --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables' --enable-avfilter --enable-libx264 --enable-gpl --enable-version3 --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-x11grab --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-static --enable-libgsm --enable-libxvid --enable-libvpx --enable-libvorbis --enable-libvo-aacenc --enable-libmp3lame
  
    libavutil      52. 38.100 / 52. 38.100
  
    libavcodec     55. 18.102 / 55. 18.102
  
    libavformat    55. 12.100 / 55. 12.100
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 79.101 /  3. 79.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Splitting the commandline.
  
  Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
  
  Reading option '-i' ... matched as input file with argument 'rtsp://admin:admin@192.168.4.3:554/0'.
  
  Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'libmp3lame'.
  
  Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '22050'.
  
  Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'copy'.
  
  Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'flv'.
  
  Reading option '/dev/null' ... matched as output file.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option loglevel (set logging level) with argument debug.
  
  Applying option y (overwrite output files) with argument 1.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file rtsp://admin:admin@192.168.4.3:554/0.
  
  Successfully parsed a group of options.
  
  Opening an input file: rtsp://admin:admin@192.168.4.3:554/0.
  
  [rtsp @ 0x9d9ccc0] SDP:
  
  v=0
  
  o=StreamingServer 3331435948 1116907222000 IN IP4 192.168.4.3
  
  s=h264.mp4
  
  c=IN IP4 0.0.0.0
  
  t=0 0
  
  a=control:*
  
  m=video 0 RTP/AVP 96
  
  a=control:trackID=0
  
  a=rtpmap:96 H264/90000
  
  a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z0LgHtoCgPRA,aM4wpIA=
  
  m=audio 0 RTP/AVP 0
  
  a=control:trackID=1
  
  a=rtpmap:0 PCMU/8000
  
  a=ptime:20
  
  m=application 0 RTP/AVP 107
  
  a=control:trackID=2
  
  a=rtpmap:107 vnd.onvif.metadata/90000
  
  
  
  
  
  [rtsp @ 0x9d9ccc0] video codec set to: h264
  
  [NULL @ 0x9d9f400] RTP Packetization Mode: 1
  
  [NULL @ 0x9d9f400] Extradata set to 0x9d9f900 (size: 22)!
  
  [rtsp @ 0x9d9ccc0] audio codec set to: pcm_mulaw
  
  [rtsp @ 0x9d9ccc0] audio samplerate set to: 8000
  
  [rtsp @ 0x9d9ccc0] audio channels set to: 1
  
  [rtsp @ 0x9d9ccc0] hello state=0
  
  [h264 @ 0x9d9f400] Current profile doesn't provide more RBSP data in PPS, skipping
  
      Last message repeated 1 times
  
  [rtsp @ 0x9d9ccc0] All info found
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Input #0, rtsp, from 'rtsp://admin:admin@192.168.4.3:554/0':
  
    Metadata:
  
      title           : h264.mp4
  
    Duration: N/A, start: 0.000000, bitrate: 64 kb/s
  
      Stream #0:0, 28, 1/90000: Video: h264 (Constrained Baseline), yuv420p, 640x480, 1/180000, 10 tbr, 90k tbn, 180k tbc
  
      Stream #0:1, 156, 1/8000: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
  
  Successfully opened the file.
  
  Parsing a group of options: output file /dev/null.
  
  Applying option acodec (force audio codec ('copy' to copy stream)) with argument libmp3lame.
  
  Applying option ar (set audio sampling rate (in Hz)) with argument 22050.
  
  Applying option vcodec (force video codec ('copy' to copy stream)) with argument copy.
  
  Applying option f (force format) with argument flv.
  
  Successfully parsed a group of options.
  
  Opening an output file: /dev/null.
  
  Successfully opened the file.
  
  detected 2 logical cores
  
  [graph 0 input from stream 0:1 @ 0x9f15380] Setting 'time_base' to value '1/8000'
  
  [graph 0 input from stream 0:1 @ 0x9f15380] Setting 'sample_rate' to value '8000'
  
  [graph 0 input from stream 0:1 @ 0x9f15380] Setting 'sample_fmt' to value 's16'
  
  [graph 0 input from stream 0:1 @ 0x9f15380] Setting 'channel_layout' to value '0x4'
  
  [graph 0 input from stream 0:1 @ 0x9f15380] tb:1/8000 samplefmt:s16 samplerate:8000 chlayout:0x4
  
  [audio format for output stream 0:1 @ 0x9efa7c0] Setting 'sample_fmts' to value 's32p|fltp|s16p'
  
  [audio format for output stream 0:1 @ 0x9efa7c0] Setting 'sample_rates' to value '22050'
  
  [audio format for output stream 0:1 @ 0x9efa7c0] Setting 'channel_layouts' to value '0x4|0x3'
  
  [audio format for output stream 0:1 @ 0x9efa7c0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:1'
  
  [AVFilterGraph @ 0x9f15980] query_formats: 4 queried, 9 merged, 3 already done, 0 delayed
  
  [auto-inserted resampler 0 @ 0x9dfada0] ch:1 chl:mono fmt:s16 r:8000Hz -> ch:1 chl:mono fmt:s16p r:22050Hz
  
  Output #0, flv, to '/dev/null':
  
    Metadata:
  
      title           : h264.mp4
  
      encoder         : Lavf55.12.100
  
      Stream #0:0, 0, 1/1000: Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 640x480, 1/90000, q=2-31, 1k tbn, 90k tbc
  
      Stream #0:1, 0, 1/1000: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 22050 Hz, mono, s16p
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (pcm_mulaw -> libmp3lame)
  
  Press [q] to stop, [?] for help
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 135.4kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 134.4kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 135.0kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 135.5kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 136.9kbits/s
  
  Queue input is backward in time=     233kB time=00:00:13.69 bitrate= 139.4kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 136.3kbits/s
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 13926; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 13952; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 13979; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14005; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14031; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14057; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14083; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14109; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14135; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14161; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14188; changing to 14239. This may result in incorrect timestamps in the output file.
  
  [flv @ 0x9de1200] Non-monotonous DTS in output stream 0:1; previous: 14239, current: 14214; changing to 14239. This may result in incorrect timestamps in the output file.
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 141.5kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 142.0kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 142.5kbits/s
  
  Receiver Report delay: 469789, gettime: -1527669086, last_recep: 322446, timebase: -1534837492
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 141.5kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 141.7kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 141.1kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 140.6kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 140.7kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.9kbits/s
  
  Receiver Report delay: 132993, gettime: -1516538925, last_recep: 322446, timebase: -1518568234
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.6kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.6kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.7kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.4kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 140.0kbits/s
  
  Receiver Report delay: 897727, gettime: -1504870331, last_recep: 322446, timebase: -1518568552
  
  [NULL @ 0x9d9f400] Current profile doesn't provide more RBSP data in PPS, skipping
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.4kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.1kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.0kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 139.0kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 138.6kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 138.5kbits/s
  
  Current profile doesn't provide more RBSP data in PPS, skippingrate= 138.2kbits/s
  
  EOF on sink link output stream 0:1:default.time=00:00:58.40 bitrate= 139.6kbits/s
  
  No more output streams to write to, finishing.
  
  [libmp3lame @ 0x9dfa580] Trying to remove 344 more samples than there are in the queue
  
  frame=  589 fps= 11 q=-1.0 Lsize=    1003kB time=00:00:58.85 bitrate= 139.5kbits/s
  
  video:724kB audio:231kB subtitle:0 global headers:0kB muxing overhead 4.955356%
  
  2959 frames successfully decoded, 0 decoding errors
  
  [AVIOContext @ 0x9e021c0] Statistics: 3 seeks, 2860 writeouts
  
  [root@localhost ffmpeg]#