关于IPod video

如果是看视频为重的话，PSP加PMP才是性价比的王道～ 2.0版的PMP号称2小时播放消耗20%的电力，更重要的是PMP是可以真正达到480X272的分辨率，而不是MP4的缩小版，2G的棒子可以装很多视频了，虽然在容量上确实和IPOD没的比，可是作为视频来说，看好比看多重要吧？

以下引用夜雨轩澜在2006-7-26 23:45:52的发言： 如果是看视频为重的话，PSP加PMP才是性价比的王道～ 2.0版的PMP号称2小时播放消耗20%的电力，更重要的是PMP是可以真正达到480X272的分辨率，而不是MP4的缩小版，2G的棒子可以装很多视频了，虽然在容量上确实和IPOD没的比，可是作为视频来说，看好比看多重要吧？

要看好的话还不如直接用DVD+高清+Z版来得华丽,再说小P还有很多外接设备选捏,花100RMB买个工业电池也够PMP3、4个小时了吧

we are using the psp avc decoding api (the only libavcodec part used is the mp3 decoding now)
at 222mhz, the psp can decode 480x272 @ ~180fps!
(on the player the speed is around 67fps, software mp3 decoding slow down stuffs alot)
probably in successive versions i'll downclock the psp to 111mhz

ffmpeg h264 goes really slow on psp atm (a lot of work would be required to get full speed in software)

interesting infos about bframes (i was assuming bframes totally not working)

about the x264 modifications, my info_file patch is used by my pmp muxer (so it's useful for me and for everyone using the muxer)
the pictiming patch is done by magiK, i don't know 100% the details, but the psp don't decode the stream (or crash) without it (this patch was made analyzing the avc stream inside pmf files and streams produced with the elecard codec)