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| 00:19.53 | *** topic/#maemo is Welcome to #maemo http://maemo.org/intro/ | N9/harmattan related questions please in #harmattan ! | "firmware" see ~lf (or ~tabletsdev ~combined ~emmc ~flasher) sdk: ~sb | http://wiki.maemo.org/Community_Council | Source: http://wiki.maemo.org/Sources | Chanlog: http://mg.pov.lt/maemo-irclog | #maemo-ssu is where the (few) devels and maintainers of the maemo-future meet |
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| 17:10.35 | sparre | Do any of you happen to have some sensible video recoding suggestions for the N900? |
| 17:11.16 | sparre | I imagine that "ffmpeg" is the best tool, but which are the best parameters, if I'm going to play the videos on my N900? |
| 17:13.31 | sparre | (I'm going to live in a tent for four days.) |
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| 18:06.00 | DocScrutinizer05 | sparre: please elaborate |
| 18:06.47 | DocScrutinizer05 | what's wrong with maemo's very own genuine camera and mediaplayer? |
| 18:07.43 | sparre | I have some existing videos in MKV format, which I wish to recode for play-back on an N900. |
| 18:08.33 | sparre | They are a bit large (close to 4 Gb/hour), so I consider recoding in a slightly lower quality. |
| 18:09.03 | sparre | I intend to use the built-in mediaplayer, but it can't handle any format. |
| 18:09.30 | sparre | I haven't tried with my MKV files because they are a bit large. |
| 18:11.34 | DocScrutinizer05 | aaah |
| 18:23.08 | DocScrutinizer05 | what worked for me in internal player is https://pastebin.com/aLNvAyPm |
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| 19:04.53 | DocScrutinizer05 | /home/jr/Documents/N900/backup/MyDocs/.videos/Dr__House_10.11.17_00-35_rtl_50_TVOON_DE.mpg.avi: RIFF (little-endian) data, AVI, 640 x 360, 25.00 fps, video: DivX 5, audio: MPEG-1 Layer 3 (stereo, 44100 Hz) |
| 19:05.07 | DocScrutinizer05 | sparre: ^^^ HTH |
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| 19:40.46 | sparre | Thanks. |
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| 20:27.06 | sicelo | 640x360 seems small though |
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| 20:56.25 | DocScrutinizer05 | 800*480 prolly would be optimum (wild guess) but I dodn't see that option for download |
| 20:57.39 | DocScrutinizer05 | then, I wanted the stuff for plaback via CVBS to a TV composite input, and for that 640*400 sounds pretty fine |
| 20:58.45 | DocScrutinizer05 | 640*360 proly results in a 10% aspect ratio error on TV, which should be OKish stll |
| 20:59.37 | DocScrutinizer05 | whatever, rhis is what worked for me, on holidays |
| 20:59.56 | Maxdamantus | Note that the video resolution alone does not necessarily tell you the overall aspect ratio. |
| 21:00.29 | DocScrutinizer05 | using N900 and video cable for watching movies on arbitrary TVs |
| 21:00.38 | Maxdamantus | (all commonly used video encodings today support a non-1:1 pixel aspect ratio) |
| 21:02.20 | sicelo | on 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. |
| 21:02.21 | DocScrutinizer05 | sure I've seen better quality movie playback before, but hey for holiday when you don't want to bring your VDR or DVD-player |
| 21:03.11 | sicelo | if anyone has a hint/suggestion, i'd be happy to try it |
| 21:03.19 | DocScrutinizer05 | sicelo: you found a toxic sequence for the H.nnn decoder |
| 21:03.50 | DocScrutinizer05 | it's a bug in N900 driver and DSP I guess |
| 21:05.50 | sicelo | should i try a different codec maybe? right now, according to OpenMediaPlayer, coded is MPEG-4 video |
| 21:06.16 | DocScrutinizer05 | for 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 ticket |
| 21:07.11 | DocScrutinizer05 | for just "fixing" the issue, simply resample/recode/transcode the whole video file |
| 21:08.49 | Maxdamantus | If it's DSP, presumably reencoding the audio should suffice. |
| 21:09.14 | Maxdamantus | which is relatively quick: ffmpeg -i foo.mkv -vcodec copy -acodec mp3 foo-out.mkv |
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| 21:10.02 | 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) |
| 21:10.04 | sicelo | i'll try that. |
| 21:10.52 | Maxdamantus | (`mp3` might have to be `mp3lame` or `libmp3lame` or something .. try looking through `ffmpeg -codecs` if none of those work) |
| 21:14.24 | DocScrutinizer05 | if 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'` |
| 21:16.26 | sicelo | how could we fix dsp decoder? |
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