On Sat, Mar 12, 2022 at 10:11:52AM -0500, Dave Rice wrote:
>
>
> > On Mar 10, 2022, at 4:41 AM, Tobias Rapp <t.r...@noa-archive.com> wrote:
> >
> > On 09/03/2022 19:18, Michael Niedermayer wrote:
> >> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
> >> ---
> >> doc/bitstream_filters.texi | 30 ++++++++
> >> libavcodec/Makefile | 1 +
> >> libavcodec/bitstream_filters.c | 1 +
> >> libavcodec/dv_error_marker_bsf.c | 127 +++++++++++++++++++++++++++++++
> >> 4 files changed, 159 insertions(+)
> >> create mode 100644 libavcodec/dv_error_marker_bsf.c
> >> diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi
> >> index a0092878c8..8c5d84dceb 100644
> >> --- a/doc/bitstream_filters.texi
> >> +++ b/doc/bitstream_filters.texi
> >> @@ -132,6 +132,36 @@ the header stored in extradata to the key packets:
> >> ffmpeg -i INPUT -map 0 -flags:v +global_header -c:v libx264 -bsf:v
> >> dump_extra out.ts
> >> @end example
> >> +@section dv_error_marker
> >> +
> >> +Blocks in DV which are marked as damaged are replaced by blocks of the
> >> specified color.
> >> +
> >> +@table @option
> >> +@item color
> >> +The color to replace damaged blocks by
> >> +@item sta
> >> +A 16 bit mask which specifies which of the 16 possible error status
> >> values are
> >> +to be replaced by colored blocks. 0xFFFE is the default which replaces
> >> all non 0
> >> +error status values.
> >> +@table @samp
> >> +@item ok
> >> +No error, no concealment
> >> +@item err
> >> +Error, No concealment
> >> +@item res
> >> +Reserved
> >> +@item notok
> >> +Error or concealment
> >> +@item notres
> >> +Not reserved
> >> +@item Aa, Ba, Ca, Ab, Bb, Cb, A, B, C, a, b, erri, erru
> >> +The specific error status code
> >> +@end table
> >> +see page 44-46 or section 5.5 of
> >> +@url{http://web.archive.org/web/20060927044735/http://www.smpte.org/smpte_store/standards/pdf/s314m.pdf}
> >> +
> >> +@end table
> >> +
> >> @section eac3_core
> >> [...]
> > The filter options look nice to me now. Have not actually tested the
> > bitstream filter on DV files, though.
>
> I tested this and this works well for me. Here's a few samples that
> demonstrate the filter:
>
> ./ffmpeg -i
> https://samples.ffmpeg.org/archive/audio/pcm_s16le/dv+dvvideo+pcm_s16le++dropout.dv
> -bsf dv_error_marker=sta=b -f rawvideo -c:v copy - | ffplay -
> ./ffmpeg -i
> https://archive.org/download/DvAnalyzerSampleDvVideoErrorConcealment/DV_Analyzer_Sample_Video_Error_Concealment_original.dv
> -bsf dv_error_marker=sta=b -f rawvideo -c:v copy - | ffplay -I tested a bit more and it failed with dvcprohd, i have fixed it and will in a moment post a version that seems to work with both please retest PS: i used some artificially damaged files from fate/dv/ thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws. -- Plato
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