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hardwarerelated:sony_walkman_nwz-a826 [2018/06/10 02:19]
chris [How to encode videos for the walkman?]
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-===== What? ===== 
-My notes on using the Sony NWZ-A826 walkman with linux, should apply to all NWZ-A8** models. ​ I use debian but should work for all distros. 
  
-  * [[http://​esupport.sony.com/​CA/​perl/​support-info.pl?​template=&​info_id=148]] -- sonys listing of bluetooth profiles 
-  * There are now other versions available: Sony NWZ-A826KB includes a bluetooth headphones, Sony NWZ-S738F also has a noise cancellation system 
-  * pros: cheaper than the ipod, bluetooth music streaming, sony allows mounting of the device as usual usb_storage device (quite different from ipods) 
-  * cons: "​rootkit-issues",​ no support for the ogg format, bluetooth only used for music-streaming - not to transfer files 
-  * What works from linux: storing audio/​video/​pictures onto the walkman, cd-ripping and encoding to mp3, stuffing cover-art into the mp3s, converting pictures to formats optimal for the walkman (thou most jpegs can be displayed as they are), encoding videos to be played on the walkman 
- 
-===== the hardwarespecs ===== 
-  * display: 2.4-inches, 320x240 
-  * usb 2.0 connection, akku loaded via usb 
-  * playback time: music approx. 36 hours / video approx. 10 hours 
-  * video playback AVC (H.264/​AVC),​ MPEG-4 
-  * image playback JPEG 
-  * audio playback MP3, WMA, AAC-LC, Linear PCM 
-  * dimensions 50.2 x 93.6 x 9.3mm / weight 58g 
-  * bluetooth 2.0, supports profiles A2DP 1.0 (Advanced Audio Distribution Profile) and AVRCP 1.3 (A/V Remote Control Profile) for streaming of audio to Headphones, A/V equipment, In-vehicle equipment, Personal computers or Mobile phones and remote-controlling those devices 
- 
-===== managing music/​picture/​video files ===== 
-== mounting == 
-This has to be done to do file operations. Do not disconnect the walkman while it is mounted! 
-<​code>​ 
-tail -f /​var/​log/​messages &    # start watching the logs 
-# now onnect the walkman, it can be accessed with the usual linux usb-storage driver. 
-# if everyting goes well usb_storage gets loaded and you the A826 gets available as a new device. 
-# You should get an output like 'sda: sda1', saying you can access the A826 under /dev/sda1. 
-# If that doesnt happen try to manually load the driver: 
-modprobe usb_storage 
-# - if that still doesnt work check if usb-drivers are loaded and the A826 comes up as usb-device at all. 
-mkdir -p /​mnt/​walkman ​       # creates a mountpoint if not existant 
-mount /dev/sda1 /​mnt/​walkman # mounts the A826, use your device here. 
-</​code>​ 
- 
-== storing/​deleting/​moving files == 
-This is how music/​pictures/​videos are managed. Usual file-operations can be used. Store pictures under directory '​picture',​ music under '​music'​ etc. 
-<​code>​ 
-cp -r /​home/​user/​tinypics /​mnt/​walkman/​pictures ​                  # copies pictures 
-rm -r /​mnt/​walkman/​pictures/​tinypics ​                             # deletes those 
-mv /​mnt/​walkman/​pictures/​tinypics /​mnt/​walkman/​pictures/​tinypics2 # move directory 
-cp -r /​home/​user/​musicfiles /​mnt/​walkman/​music ​                   # copies music 
-</​code>​ 
-Notice: pictures can only be stored one directory depth. So pictures/​dir1/​pic1.jpg is ok while pictures/​dir1/​dir2/​pic2.jpg is not accessable for viewing on the A826. 
- 
-== umounting == 
-This is needed bevore unplugging the A826 to ensure all i/o operations have finished and the filesystem is clean. 
-<​code>​ 
-umount /​mnt/​walkman 
-</​code>​ 
- 
-===== How to see album covers? ===== 
-The A826 expects those inside the mp3-file as part of an ID3v2.3-tag. Add the cover-art to the mp3-file i.e. using [[http://​easytag.sourceforge.net/​|easytag]] (apt-get install easytag). Start it and click Settings -> Preferences -> ID3 Tag Settings -> select '​ID3v2.3'​ instead of the default '​ID3v2.4',​ hit '​OK'​. On the left select the directory with mp3-files. Select your mp3-file in the middle-window,​ on the right select the '​Pictures'​-tag,​ hit '​+',​ select your cover-art. In the top-menu use File -> Save File(s) to save, and your cover is saved in the usable manner. With [[http://​kid3.sourceforge.net/​|Kid3]] (apt-get install kid3-qt) its easy to add the same cover-art to more than one file in only one work-step. 
- 
-To do this on a whole music-collection have a look at this: http://​movingparts.net/​2007/​12/​09/​embedded-album-covers-your-psp-amarok-and-you/​ . 
- 
-===== How to encode videos for the walkman? ===== 
-== Install mencoder appropriately == 
-<​code>​ 
-apt-get install subversion-tools git-core 
-apt-get install libfaad-dev liba52-0.7.4 liba52-0.7.4-dev libdts-dev 
- 
-# get the lame source, untar, configure && make && make install 
-# get x264 from git, install it. 
-# get faac from http://​www.audiocoding.com/​faac.html,​ install it 
-svn checkout svn://​svn.mplayerhq.hu/​ffmpeg/​trunk ffmpeg 
-# get mplayer-source-snapshot from mplayerhq.hu (1.0rc2 didnt for for me) 
-tar xjf mplayer-checkout-snapshot.tar.bz2 
-cd ffmpeg 
-cp -r libav* ../​mplayer-checkout-2008-09-05/​ 
-cd ../​mplayer-checkout-2008-09-05/​ 
-./configure && make && sudo make install 
- 
-# ffmpeg: ./configure --enable-gpl --enable-pp --enable-libvorbis --enable-libtheora \ 
-#   ​--enable-liba52 --enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable-libfaad \ 
-#   ​--enable-libfaac --enable-libxvid --enable-pthreads --enable-libx264 --enable-shared 
-</​code>​ 
- 
-== Encoding w/ mencoder == 
-Now you can reencode the video so it fits the walkman. Using the one-pass-method is faster but produces worse video quality - but thats probably not worth the time spend for the small screen of the walkman. 
-  * Destination:​ mp3 audio, video AVC (H.264/​AVC),​ MPEG-4 
- 
-<​code>​ 
-# 1 pass enconding examples: 
- 
-# quality quite ok 
-mencoder -ofps 25 -of lavf -lavfopts format=mp4 -af lavcresample=48000 -srate 48000 -vf-add harddup \ 
-    -vf-add scale=320:​240 -oac lavc -ovc lavc -lavcopts \ 
-    aglobal=1:​vglobal=1:​vcodec=mpeg4:​acodec=libfaac:​abitrate=128:​vbitrate=350 \ 
-    -o evan_walkman1.mp4 evanescence__good_enough.divx 
- 
-# options tuned for better quality, encoding takes more than twice the time of previous example 
-mencoder -ofps 25 -of lavf -lavfopts format=mp4 -af lavcresample=48000 -srate 48000 -vf-add harddup \ 
-    -vf-add scale=320:​240 -oac lavc -ovc lavc -lavcopts \ 
-aglobal=1:​vglobal=1:​acodec=libfaac:​abitrate=128:​vcodec=mpeg4:​vbitrate=350:​mbd=2:​mv0:​trell:​v4mv:​cbp:​last_pred=3:​predia=2:​dia=2:​precmp=2:​cmp=2:​subcmp=2:​preme=2:​turbo \ 
-    -o evan_walkman6.mp4 evanescence__good_enough.divx 
- 
-# some lavc-opts explained (see 'man mplayer'​): ​ 
-  aglobal=1:​vglobal=1:​vcodec=mpeg4:​acodec=libfaac :  
-       all obligatory for us (extra headers, mpeg4 videocodec, AAC audiocodec) 
-  abitrate=128 : 
-       ​audiobitrate in kbps. No need to use a higher value than your input-video contains. 
-  vbitrate=350 : 
-       ​videobitrate,​ 250 is a good startingpoint. Higher results in better quality, higher 
-       than your input-video makes no sense. 
-  autoaspect : 
-       use this to retain your aspect-ratio. I dont want this, i prefer eggy heads and a 
-       ​completely used screen on the walkman. 
-  mbd=2 : 
-       ​Macroblock decision, better quality but slower 
-  mv0:​trell:​v4mv:​cbp:​last_pred=3:​predia=2:​dia=2:​precmp=2:​cmp=2:​subcmp=2:​preme=2:​ 
-       ​better quality but slower encoding 
-  turbo : 
-       (two pass only) Dramatically speeds up pass one using faster algorithms 
-</​code>​ 
- 
-== encoding w/ ffmpeg == 
-<​code>​ 
-# havent tested this: 
-ffmpeg -i infile -b 567k -s 320x240 -vcodec mpeg4 -ab 220k -ar 44100 -ac 2 -acodec libfaac outfile.mp4 
- 
-ffmpeg -y -i infile.avi -threads auto -vcodec libx264 -b 250k -maxrate 768k \ 
-   ​-flags +loop  -cmp +chroma -partitions +parti4x4+partp4x4+parti8x8+partp8x8 -flags2 \ 
-   ​+mixed_refs -level 13 -refs 3 -subq 7 -trellis 2 -me 6 -g 300 -s 320x240 -ab 128k -ar\ 
-   44100 -ac 2 -acodec libfaac outfile.mp4 
-</​code>​ 
- 
-===== faq ===== 
-== Howto encode audio as mp3? == 
-Use cdparanoia for ripping and lame for encoding as mp3. 
- 
-== How to simplify mounting/​umounting?​ == 
-Mounting can be done automatically with udev, read the udev-faq. As soon as usb-devices with special properties are plugged in scripts can be run, i.e. doing the mounting. 
- 
-== Firmware upgrade using linux? == 
-Havent seen a chance yet to do this, also havent seen yet a need to upgrade the firmware (besides beeing able to store pictures in subdirectories would be nice). 
- 
-== How to squeeze picture-size down to a minimum? == 
-Pictures on the walkman can be reencoded to 320x240 pixels. The files get smaller, of course information is lost and the pictures look bad when displayed on a bigger display. '​apt-get install imagemagick'​ installs imagemagick containing the needed convert-tool. This snippet converts all pictures not ending in _sony.jpg into the 320x240 solution and deletes the original file. 
-<​code>​ 
-find . -name '​*.jpg'​ ! -name '​*_sony.jpg'​ -type f | \ 
-     while read i; do convert "​$i"​ -resize 320x240 "​${i%.jpg}_sony.jpg"​ && rm "​$i";​ done 
-</​code>​ 
- 
-== Why can only root write files onto the path where the walkman is mounted? == 
-The walkmans filesystem is vfat which can not handle ownerships. You can use a special mount-option to make everything below the mountpoint owned by one single user and thus readable/​writable by that user: 
-<​code>​ 
-mount -o uid=chris /dev/sda1 /​mnt/​walkman 
-</​code>​ 
- 
-== Thumb-pics for the videos? == 
-Those must be placed in the video-directory and named file.jpg for a video named file.mp4. Format of the thumb-pics should be 160x120. 
hardwarerelated/sony_walkman_nwz-a826.1528589993.txt ยท Last modified: 2018/06/10 02:19 by chris