[mythtv-users] [UK] BBC HD and BBC ONE HD - recording length incorrect

Taylor Ralph taylor.ralph at gmail.com
Fri Dec 24 16:12:52 UTC 2010


On Fri, Dec 24, 2010 at 11:03 AM, Paul Gardiner <lists at glidos.net> wrote:
> On 23/12/2010 22:15, Taylor Ralph wrote:
>>
>> On Thu, Dec 23, 2010 at 10:31 AM, Paul Gardiner<lists at glidos.net>  wrote:
>>>
>>> On 22/12/2010 23:39, Taylor Ralph wrote:
>>>>
>>>> On Wed, Dec 22, 2010 at 5:26 PM, David Knight<dlknight at sdf.lonestar.org>
>>>>  wrote:
>>>>>
>>>>> On Wed, December 22, 2010 12:11 pm, Taylor Ralph wrote:
>>>>>>
>>>>>> On Wed, Dec 22, 2010 at 6:13 AM, David
>>>>>> Knight<dlknight at sdf.lonestar.org>
>>>>>> wrote:
>>>>>>>
>>>>>>> FFmpeg version SVN-r25557-snapshot, Copyright (c) 2000-2010 the
>>>>>>> FFmpeg
>>>>>>> developers
>>>>>>> �built on Oct 24 2010 07:32:30 with gcc 4.4.4 20100630 (Red Hat
>>>>>>> 4.4.4-10)
>>>>>>> �configuration: --prefix=/usr --libdir=/usr/lib64
>>>>>>> --shlibdir=/usr/lib64
>>>>>>> --mandir=/usr/share/man --enable-shared --enable-gpl
>>>>>>> --enable-version3
>>>>>>> --enable-nonfree --enable-postproc --enable-avfilter
>>>>>>> --enable-pthreads
>>>>>>> --enable-x11grab --enable-vdpau --disable-avisynth --enable-libdc1394
>>>>>>> --enable-libdirac --enable-libfaac --enable-libgsm
>>>>>>> --enable-libmp3lame
>>>>>>> --enable-libnut --enable-libopencore-amrnb --enable-libopencore-amrwb
>>>>>>> --enable-libopenjpeg --enable-libschroedinger --enable-libspeex
>>>>>>> --enable-libtheora --enable-libvorbis --enable-libx264
>>>>>>> --enable-libxvid
>>>>>>> --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
>>>>>>> -fexceptions
>>>>>>> -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic
>>>>>>> -fPIC'
>>>>>>> --disable-stripping
>>>>>>> �libavutil � � 50.32. 3 / 50.32. 3
>>>>>>> �libavcore � � �0. 9. 1 / �0. 9. 1
>>>>>>> �libavcodec � �52.93. 0 / 52.93. 0
>>>>>>> �libavformat � 52.84. 0 / 52.84. 0
>>>>>>> �libavdevice � 52. 2. 2 / 52. 2. 2
>>>>>>> �libavfilter � �1.53. 0 / �1.53. 0
>>>>>>> �libswscale � � 0.12. 0 / �0.12. 0
>>>>>>> �libpostproc � 51. 2. 0 / 51. 2. 0
>>>>>>> [h264 @ 0x1e1c490] non-existing SPS 0 referenced in buffering period
>>>>>>> [h264 @ 0x1e1c490] non-existing PPS referenced
>>>>>>> [h264 @ 0x1e1c490] non-existing SPS 0 referenced in buffering period
>>>>>>> [h264 @ 0x1e1c490] non-existing PPS 0 referenced
>>>>>>> [h264 @ 0x1e1c490] decode_slice_header error
>>>>>>> [h264 @ 0x1e1c490] non-existing PPS 0 referenced
>>>>>>> [h264 @ 0x1e1c490] decode_slice_header error
>>>>>>> [h264 @ 0x1e1c490] non-existing PPS 0 referenced
>>>>>>> [h264 @ 0x1e1c490] decode_slice_header error
>>>>>>> [h264 @ 0x1e1c490] non-existing PPS 0 referenced
>>>>>>> [h264 @ 0x1e1c490] decode_slice_header error
>>>>>>> [h264 @ 0x1e1c490] non-existing PPS 0 referenced
>>>>>>> [h264 @ 0x1e1c490] decode_slice_header error
>>>>>>> [h264 @ 0x1e1c490] non-existing PPS 0 referenced
>>>>>>> [h264 @ 0x1e1c490] decode_slice_header error
>>>>>>> [h264 @ 0x1e1c490] no frame!
>>>>>>>
>>>>>>> Above errors repeated for couple of pages.
>>>>>>>
>>>>>>> [mpegts @ 0x1e166e0] max_analyze_duration reached
>>>>>>> [NULL @ 0x1e3a630] start time is not set in
>>>>>>> av_estimate_timings_from_pts
>>>>>>> Input #0, mpegts, from '/video/default/8941_20101127194500.mpg':
>>>>>>> �Duration: 00:46:26.00, start: 5649.660133, bitrate: 7424 kb/s
>>>>>>> �Program 1
>>>>>>> � �Stream #0.0[0x1518]: Video: h264, yuv420p, 1440x1080 [PAR 4:3 DAR
>>>>>>> 16:9], 27.53 fps, 25 tbr, 90k tbn, 50 tbc
>>>>>>> � �Stream #0.1[0x151a](NAR): Audio: mp2, 48000 Hz, 2 channels, s16,
>>>>>>> 256
>>>>>>> kb/s
>>>>>>> � �Stream #0.2[0x151b](eng): Subtitle: [6][0][0][0] / 0x0006
>>>>>>> � �Stream #0.3[0x151c](eng): Subtitle: dvbsub
>>>>>>> � �Stream #0.4[0x1519](eng): Audio: ac3, 48000 Hz, stereo, s16, 192
>>>>>>> kb/s
>>>>>>> At least one output file must be specified
>>>>>>>
>>>>>>> Dave K.
>>>>>>>
>>>>>>
>>>>>> Is 00:46:26.00 the correct duration? What does MythTV show for the
>>>>>> duration? We now use the ffmpeg duration so if it's correct then the
>>>>>> next release will contain the fix.
>>>>>>
>>>>>> Regards.
>>>>>> --
>>>>>> Taylor
>>>>>>
>>>>>>
>>>>>
>>>>> Yes 00:46:26.00 is the correct duration, MythTV reports 00:36:07 when
>>>>> playing back the recording in mythfrontend. Playback continues when the
>>>>> status bar reaches the end but rewind and fast forward do not work
>>>>> correctly.
>>>>>
>>>>> Will the fix be backported to 0.24-fixes?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Dave
>>>>>
>>>>
>>>> I wasn't planning on back-porting the change since it still needs
>>>> considerable testing and caused a few issues already that I had to
>>>> fix. Could you play the recording back with -v playback,timestamp and
>>>> see if you find any messages with "repeat_pict" in them?
>>>
>>> Is there a commit (or set of commits) I could cherry pick onto
>>> fixes/0.24 in my local repository?
>>>
>>> Cheers,
>>>        Paul.
>>
>> There are several commits that would be required to resolve the
>> duration and time position issue. I believe they will not cleanly
>> apply if cherry-picked. This will only correct the problem
>> cosmetically but will not solve the seeking/bookmark issue.
>>
>> The core of the problem is most likely related to either mythcommflag
>> or the player not handling the frame count correctly. Someone needs to
>> create a sample that shows the problem and create a ticket if one
>> doesn't already exist and provide a link to the sample. Please make
>> sure the sample is ran through mythcommflag (creates a position map)
>> and exhibits the problem. It might actually play properly if it
>> doesn't have a position map. One way to check this is to copy the
>> recording over to MythVideo and change the name then see if it plays
>> properly or not.
>
> Yes, you are right. Bookmarks work fine when the recording is copied
> to MythVideo. I don't have any small recordings to upload anywhere
> just now, but I have something small set up for tonight.
>
> Paul.

You can always use 'dd' to cut a video for uploading. To produce a
50MB sample run the following:

dd if=/path/to/infile of=/path/to/outfile bs=1024 count=50000

Then you can upload to filebin.ca.

Regards.
--
Taylor


More information about the mythtv-users mailing list