FFmpeg | 3 Mar 11:51 2015

#4348(undetermined:new): Slight audio latency when grabbing system audio from pulseaudio

#4348: Slight audio latency when grabbing system audio from pulseaudio
-------------------------------------+-------------------------------------
             Reporter:  skriticos    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  pulseaudio   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 I'm doing screen-recordings in which I mix system audio from pulse and
 audio from an external microphone. The recording works, but the system
 audio has a slight delay (< 1 sec), just enough to be annoying.

 The recording output shows two different warning messages:

 1: [pulse  <at>  0x2804980] pa_stream_get_latency() failed
 2:
 [alsa  <at>  0x282d860] Thread message queue blocking; consider raising the
 thread_queue_size option (current value: 8)
 [output stream 0:0  <at>  0x2848f40] 100 buffers queued in output stream 0:0,
 something may be wrong.
 [x11grab  <at>  0x283f220] Thread message queue blocking; consider raising the
 thread_queue_size option (current value: 8)
 [pulse  <at>  0x2804980] Thread message queue blocking; consider raising the
 thread_queue_size option (current value: 8)

 How to reproduce:
(Continue reading)

FFmpeg | 3 Mar 07:32 2015

Re: #2387(undetermined:reopened): Support DVD sub rasterization

#2387: Support DVD sub rasterization
-------------------------------------+-------------------------------------
             Reporter:  someuser     |                    Owner:
                 Type:  enhancement  |                   Status:  reopened
             Priority:  wish         |                Component:
              Version:  git-master   |  undetermined
             Keywords:  dvdsub       |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by ubitux):

 Not yet, see ticket #2391.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/2387#comment:6>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
FFmpeg | 3 Mar 03:09 2015

Re: #2387(undetermined:reopened): Support DVD sub rasterization

#2387: Support DVD sub rasterization
-------------------------------------+-------------------------------------
             Reporter:  someuser     |                    Owner:
                 Type:  enhancement  |                   Status:  reopened
             Priority:  wish         |                Component:
              Version:  git-master   |  undetermined
             Keywords:  dvdsub       |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by edumj):

 Ok, but is it possible just to extract DVD subtitules as idx/sub files?
 like Mencoder does http://www.cs.ait.ac.th/~on/mplayer/en/menc-feat-
 extractsub.html

--
Ticket URL: <https://trac.ffmpeg.org/ticket/2387#comment:5>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
FFmpeg | 2 Mar 21:03 2015

Re: #2387(undetermined:reopened): Support DVD sub rasterization

#2387: Support DVD sub rasterization
-------------------------------------+-------------------------------------
             Reporter:  someuser     |                    Owner:
                 Type:  enhancement  |                   Status:  reopened
             Priority:  wish         |                Component:
              Version:  git-master   |  undetermined
             Keywords:  dvdsub       |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
Changes (by ubitux):

 * keywords:   => dvdsub
 * status:  closed => reopened
 * resolution:  duplicate =>

--
Ticket URL: <https://trac.ffmpeg.org/ticket/2387#comment:4>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
FFmpeg | 2 Mar 21:02 2015

Re: #2387(undetermined:closed): Support DVD sub rasterization (was: RFE: Support creating of VobSub idx/sub subtitles)

#2387: Support DVD sub rasterization
-------------------------------------+-------------------------------------
             Reporter:  someuser     |                    Owner:
                 Type:  enhancement  |                   Status:  closed
             Priority:  wish         |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:  duplicate
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
Changes (by ubitux):

 * status:  new => closed
 * resolution:   => duplicate

Comment:

 Not yet unfortunately. https://trac.ffmpeg.org/ticket/2391 is related.

 This ticket suggests a rasterisation though, so title updated.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/2387#comment:3>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
FFmpeg | 2 Mar 20:48 2015

Re: #2387(undetermined:new): RFE: Support creating of VobSub idx/sub subtitles

#2387: RFE: Support creating of VobSub idx/sub subtitles
-------------------------------------+-------------------------------------
             Reporter:  someuser     |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by edumj):

 Hi,

 so there is no way to extract idx/sub from a VOB with ffmpeg?

 It seems that Mencoder can do so http://www.cs.ait.ac.th/~on/mplayer/en
 /menc-feat-extractsub.html

 And here http://ffmpeg-users.933282.n4.nabble.com/extract-subtiles-
 td939612.html says it can be done with "-bsf mov2textsub", but only
 exports one .txt file with unkwown format

 Here http://ffmpeg.org/pipermail/ffmpeg-devel/2006-October/018399.html
 says something like that, but doesn't work.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/2387#comment:2>
FFmpeg <https://ffmpeg.org>
(Continue reading)

FFmpeg | 2 Mar 20:06 2015

#4347(avformat:new): support write crc elements to level 1 elements of matroska

#4347: support write crc elements to level 1 elements of matroska
-------------------------------------+-------------------------------------
               Reporter:  dericed    |                  Owner:
                   Type:             |                 Status:  new
  enhancement                        |              Component:  avformat
               Priority:  wish       |               Keywords:  matroska,
                Version:  git-       |  crc
  master                             |               Blocking:
             Blocked By:             |  Analyzed by developer:  0
Reproduced by developer:  0          |
-------------------------------------+-------------------------------------
 Summary of the enhancement request:

 The Matroska specification states "All level 1 elements should include a
 CRC-32." http://matroska.org/technical/specs/index.html

 I propose supporting an option to add CRC sub-elements while muxing to
 MKV. Just a dream.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4347>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
FFmpeg | 2 Mar 20:04 2015

#4346(undetermined:new): Uncompressed BGR24 AVIs are occasionally unusable

#4346: Uncompressed BGR24 AVIs are occasionally unusable
-------------------------------------+-------------------------------------
             Reporter:  ejlasota     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 Converting to rawvideo BGR24 occasionally produces AVIs that can not be
 loaded by most Windows players.  ffmpeg itself seems to be able to load
 them without issue though.

 How to reproduce:
 https://www.dropbox.com/s/2bhlwsnwg5n77b4/damaged_uncompressed.zip?dl=0

 damaged_uncompressed_source.avi is the source video.
 damaged_uncompressed_out.avi is the output from FFMPEG.  This file will
 not open in MPC-HC 1.6.7.7114 or Windows Media Player 12.0.9600.17031.
 VirtualDub 1.10.4 will open it, but it will not show any video.
 damaged_uncompressed_out_vdub.avi is output from opening
 damaged_uncompressed_source.avi and saving it as Uncompressed using
 VirtualDub.  It plays back fine in all of the aforementioned programs.

 Using -pix_fmt yuv420p instead does not cause this problem.

 Using -vcodec bmp instead will allow VirtualDub to open the video, but it
 will be upside-down and have severe artifacts.  MPC-HC and WMP will still
(Continue reading)

FFmpeg | 2 Mar 20:00 2015

#4345(undetermined:new): Can't convert text subs to XSUB

#4345: Can't convert text subs to XSUB
-------------------------------------+-------------------------------------
             Reporter:  edumj        |                     Type:
               Status:  new          |  enhancement
            Component:               |                 Priority:  normal
  undetermined                       |                  Version:
             Keywords:  subtitles    |  unspecified
  xsub                               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Hi,

 Is it posible to convert a .srt subtitle directly to XSUB?

 I know it can't, because srt are not bitmap, but the "subtitles" filter
 can render text subs to bitmaps and hardsub them to the video, so if they
 are converted to bitmaps they should be encoded as XSub...

 Or, should I export srt to bitmaps and somehow embed them as they were
 idx/sub?

 Thanks!

 Summary of the bug:
 How to reproduce:
 {{{
 ffmpeg -i input -vf subtitles=%~nsx1:si=1 -scodec xsub output
 ffmpeg versiĆ³n N-70148-g418be7c
 built with gcc 4.9.2 (GCC)
(Continue reading)

FFmpeg | 2 Mar 19:34 2015

#4344(undetermined:new): XSUBs are too low in PAL video, on PS3

#4344: XSUBs are too low in PAL video, on PS3
-------------------------------------+-------------------------------------
             Reporter:  edumj        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  xsub dxsb    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Hi,

 I'm making test with subtitles, and when I try to convert a PAL VOB to
 Xvid with embed subs (idx/sub to xsub) it looks ok in VLC, but stretched
 and off the screen in PS3.
 It seems that only happens with videos with height over 480 pixels,
 because 720x480 subs are ok in PS3.
 It's like the PS3 thinks the bitmap subtitle are 720x480 and stretches
 them to 720x576, so lower subs are off the screen.

 Does the "-scodec xsub" encoder has any options?? I didn't find any info
 about xsub encoder, nor any parameters in FFMPEG documentation.
 Are the bitmaps fullscreen or clipped? Is there a way to set position of
 subs?

 It's like the bitmaps are 720x576 but marked somewhere as 720x480??

 Summary of the bug:
 How to reproduce:
 {{{
(Continue reading)

FFmpeg | 2 Mar 13:35 2015

Re: #2686(avcodec:open): Native AAC encoder collapses at high bitrates on some samples

#2686: Native AAC encoder collapses at high bitrates on some samples
-------------------------------------+-------------------------------------
             Reporter:  Kamedo2      |                    Owner:
                 Type:  defect       |  klaussfreire
             Priority:  normal       |                   Status:  open
              Version:  git-master   |                Component:  avcodec
             Keywords:  aac          |               Resolution:
  regression                         |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by klaussfreire):

 I tracked it all the way to codebook_trellis_rate and
 encode_window_bands_info with short windows. When the optimum allocation
 spans more than SCALE_MAX_DIFF sf, anmr is carefull not to create
 allocations that result in deltas to be encoded greater than
 SCALE_MAX_DIFF, but codebook_trellis_rate and the other both undo this. I
 tried many ways to patch that with no avail as of yet. The issue almost
 always happens near zero bands and the switch from one window group to the
 next (which is usually where the greatest deltas happen and where it is
 hardest to enforce).

 But I did just notice the assertion error happens on git head as well. It
 seems like a pre-existing bug. Feel free to check exactly under which
 conditions, I just saw the error logs on a run of tests and didn't get to
 comparing when it happens vs v9b just yet.

--
(Continue reading)


Gmane