IRC log of #maemo for Saturday, 2018-08-04

« Friday, 2018-08-03 Index Sunday, 2018-08-05 »
DocScrutinizer05using N900 and video cable for watching movies on arbitrary TVs00:00
Maxdamantus(all commonly used video encodings today support a non-1:1 pixel aspect ratio)00:00
siceloon the subject of videos, i have a video that is aboit 2hours 10 minutes long. but on N900, it always hangs at 71 minutes. however, the same file plays in its entirety on laptop.00:02
DocScrutinizer05sure I've seen better quality movie playback before, but hey for holiday when you don't want to bring your VDR or DVD-player00:02
siceloif anyone has a hint/suggestion, i'd be happy to try it00:03
DocScrutinizer05sicelo: you found a toxic sequence for the H.nnn decoder00:03
DocScrutinizer05it's a bug in N900 driver and DSP I guess00:03
siceloshould i try a different codec maybe? right now, according to OpenMediaPlayer, coded is MPEG-4 video00:05
DocScrutinizer05for fame and fun you could try truncate the video material down to that one second or one master and n times i-frames that cause the hang, then publish that as bug ticket00:06
DocScrutinizer05for just "fixing" the issue, simply resample/recode/transcode the whole video file00:07
MaxdamantusIf it's DSP, presumably reencoding the audio should suffice.00:08
Maxdamantuswhich is relatively quick: ffmpeg -i foo.mkv -vcodec copy -acodec mp3 foo-out.mkv00:09
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Maxdamantus(since the main expensive thing in encoding is the video, and with the command above, it just copies the video stream instead of reencoding it)00:10
siceloi'll try that.00:10
Maxdamantus(`mp3` might have to be `mp3lame` or `libmp3lame` or something .. try looking through `ffmpeg -codecs` if none of those work)00:10
DocScrutinizer05if you could spot the segment that contains the toxic sequence we could either try to fix the DSP decoder or even build a simplistic filter like `sed -i media.avi 's/($part1)$part2($part3)/\1$DUMMY\1/g'`00:14
sicelohow could we fix dsp decoder?00:16
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brolin_empeyWhat is TV? ;-)04:43
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DocScrutinizer05sicelo: some ultrabright and smart hacker might RE the DSP blob and patch it11:37
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