hello guys this is my first thread here...
I know I'm posting a very frequent question, but I tried many different converters still no satisfactory output! please I need your help!
So to start with.. I'm converting a video file to same container but with slightly lower resolution to support it on my mobile phone
So the original resolution is 720x304 and I'm converting it to a lesser one about 624x272 Keeping rest parameters same.Code:General Unique ID : 232250534500425768444268969911738228310 (0xAEB9D36E25264644A151C642C6DCDE56) Complete name :\Downloads\The Thieves.mkv Format : Matroska Format version : Version 4 / Version 2 File size : 500 MiB Duration : 2h 15mn Overall bit rate : 515 Kbps Movie name : The Thieves 2012 BRRip 480p x264 AAC - VYTO Encoded date : UTC 2010-02-22 21:41:31 Writing application : mkvmerge v5.9.0 ('On The Loose') built on Dec 9 2012 15:37:01 Writing library : libebml v1.3.0 + libmatroska v1.4.0 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High 10@L4.1 Format settings, CABAC : Yes Format settings, ReFrames : 8 frames Muxing mode : Header stripping Codec ID : V_MPEG4/ISO/AVC Duration : 2h 15mn Nominal bit rate : 457 Kbps Width : 720 pixels Height : 304 pixels Display aspect ratio : 2.35:1 Frame rate mode : Constant Frame rate : 24.000 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 10 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.087 Writing library : x264 core 129 r2230 1cffe9f Encoding settings : cabac=1 / ref=8 / deblock=1:-3:-1 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / psy_rd=1.00:2.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-6 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=457 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=81 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=50000 / vbv_bufsize=50000 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00 Default : Yes Forced : No Audio ID : 2 Format : AAC Format/Info : Advanced Audio Codec Format profile : HE-AACv2 / HE-AAC / LC Codec ID : A_AAC Duration : 2h 15mn Channel(s) : 2 channels / 1 channel / 1 channel Channel positions : Front: L R / Front: C / Front: C Sampling rate : 48.0 KHz / 48.0 KHz / 24.0 KHz Compression mode : Lossy Language : Korean Default : Yes Forced : No
Everything goes fine .. When I start converision in Handbrake, ffmpeg or ripbot.. Initially I get a decent above 110fps but slowly the fps drops to about 20-10 fps in 10mins... I check the CPU utilization which shows me above 80% in the start but gradually decreases to 40-30%
Why is this happening???
I'm not talking specificallly about this particular conversion ... with other sources also Im getting same problems! I cant take this anymore and Im getting frustrated !
Specs :
Core i3 , 4Gig RAM, 500GB HDD , ATI RADEON GPU.
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Last edited by Baldrick; 25th Feb 2014 at 10:05. Reason: fixed
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Often the start of a movie is something like a logo or a few seconds of black so the encoder can deal with it quickly. But more importantly, your downsize conversion seems insignificant and unnecessary. Is that the only resolution your phone accepts?
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You've also only got an I3, though need more specs to know how low, and you're using a single hard drive. Things would be more streamlined reading from one drive and writing to another. With a single drive, you're trying to read and write at the same time to the same drive.
Look for other posts that describe optimum conversion setups. In general:
- More cores the better.
- Use software that can take advantage of multiple cores.
- Have enough RAM to cover the programs so there's no paging/swaping
- Use separate drives for source and destination to avoid thrashing.
- Don't have other processes running that use the same resources (cpu, disk, ram...) that the conversion software uses.Have a good one,
neomaine
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Two hard drives will make almost no difference in encoding time when your going from a highly compressed input to a highly compressed output. You easily have enough DRAM to encode SD video. If you don't care too much about quality use an encoder that supports Intel Quick Sync. That's probably your best option. Try the QS mod of Handbrake.
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If the bottleneck is cpu, then I'd agree with you. The reencoding may not hit an i/o threshold where it makes a difference.
But, given any modern cpu with quad core (or more) and an encoder that takes advantage of them, it definitely makes a difference. I don't reencode much these days, disk space is just way too cheap, but find a marked difference when I forget to use separate source/dest drives.Have a good one,
neomaine
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With AVC (both input and output) conversion disk I/O is almost never a bottleneck. Using separate source and destination disks might save a few seconds off an hour long encode. Unless the OP is using an old USB 1.1 external hard drive he's not going to significantly improve his performance by using two drives.
Last edited by jagabo; 26th Feb 2014 at 08:42.
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