Opened 10 years ago

Closed 6 years ago

Last modified 6 years ago

#153 closed defect (fixed)

DVB Subtitles Streams decoding and encoding errors

Reported by: Julian Gardner Owned by:
Priority: normal Component: avcodec
Version: unspecified Keywords: dvbsub
Cc: Anshul Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

These is a test stream that shows errors in the DVB Subtitle decoder and encoder.

Attachments (1)

bbc_small.ts (2.5 MB ) - added by Julian Gardner 10 years ago.
shows live audio transcoding dvb subtitles

Change History (16)

by Julian Gardner, 10 years ago

Attachment: bbc_small.ts added

shows live audio transcoding dvb subtitles

comment:1 by Julian Gardner, 10 years ago

also i used some of the sample streams from here

http://www.screen.subtitling.com/html/mm%20downloads.html

comment:2 by Carl Eugen Hoyos, 10 years ago

Has this been fixed by the latest changes to dvb?

comment:3 by Stefano Sabatini, 9 years ago

Priority: importantnormal
Status: newopen

How to test for the error, what's the expected result and what do you see?

Can you reproduce the error with latest FFmpeg?

Also please show complete command and log, consider using -report.

comment:4 by Stefano Sabatini, 9 years ago

Summary: DVB Subtitles Test StreamsDVB Subtitles Streams decoding and encoding errors

comment:5 by Carl Eugen Hoyos, 9 years ago

Playback with ffplay has not changed in the last 18 months for the attached sample.

comment:6 by Carl Eugen Hoyos, 8 years ago

Keywords: dvbsub added; dvb subtitles removed

in reply to:  6 comment:7 by Anshul, 7 years ago

As I am intrested in this report
cehoyos, can you briefly explain question asked by saste.

comment:8 by Carl Eugen Hoyos, 7 years ago

How?

comment:9 by Anshul, 7 years ago

When I run(decode using ffplay) the clip attached here, i see only problem is "Help"(subtile) having green color.

I dont see any error message while decoding at my place.

I just wanted to know what do we expect from dvb decoder or encoder.
This report shows only "we have error", what error is, Is it red colored error message or something unexpected at output. if output is different with other player or decoder then in what sense. which player did we checked to compare output.

comment:10 by Anshul, 7 years ago

Cc: Anshul added

comment:11 by Carl Eugen Hoyos, 7 years ago

joolzg reported this ticket and Stefano asked him for more information.
I asked him recently for more information about this ticket:
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/175169/focus=175260
He apparently missed my question.

in reply to:  11 comment:12 by Stefano Sabatini, 7 years ago

Replying to cehoyos:

joolzg reported this ticket and Stefano asked him for more information.
I asked him recently for more information about this ticket:
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/175169/focus=175260
He apparently missed my question.

The problem is related to the first text displayed by ffplay, the "help" word which looks corrupted (probably an alpha issue).

comment:13 by Carl Eugen Hoyos, 7 years ago

I thought that the first subtitle is just incomplete (or damaged). Some media players probably prefer not to show damaged subtitles but FFmpeg (default!) behaviour was always to show everything that can be decoded. After all, "help" can be read.
If this is really the issue (I don't know), "help" should not be shown for -strict strict.

comment:14 by Michael Niedermayer, 6 years ago

Reproduced by developer: set
Resolution: fixed
Status: openclosed

Fixed in 4b90dcb8493552c17a811c8b1e6538dae4061f9d
If other issues remain please open separate tickets

comment:15 by Carl Eugen Hoyos, 6 years ago

I believe only joolzg can tell us if this issue was fixed...

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