Allego due report di uno stesso video avente due formati diversi.
Qual'è quello che può avere la maggiore qualità?
Grazie

PRIMO VIDEO

[ About file ]

Name: 1.mp4
Date: Thu, 24 Nov 2016 10:35:57 +0100
Size: 1,870,928,321 bytes (1784.256 MiB)

[ Magic ]

Tipo file: ISO Media, MPEG v4 system, version 1

[ Generic infos ]

Duration: 01:30:35 (5434.847 s)
Container: MP4/MOV
Major brand: ISO Base Media version 512
Compatible brands: JVT AVC
Creation time: Thu, 01 Jan 1970 01:00:00 +0100
Modification time: Thu, 01 Jan 1970 01:00:00 +0100
Total tracks: 2
Track nr. 1: video (avc1) [VideoHandler]
Track nr. 2: audio (mp4a) [SoundHandler]
[debug] unknown id: 0x736d6864 (smhd), parent=0x6d696e66 (minf), level=4
[debug] unknown id: 0x75647461 (udta), parent=0x6d6f6f76 (moov), level=1

[ Relevant data ]

Resolution: 1280 x 720
Width: multiple of 32
Height: multiple of 16
Average DRF: 9.833
Standard deviation: 2.565
Std. dev. weighted mean: 2.064

[ Video track ]

Codec: avc1
Resolution: 1280 x 720
Frame aspect ratio: 16:9 = 1.778
Pixel aspect ratio: 1:1 = 1
Display aspect ratio: 16:9 = 1.778
Framerate: 23.976 fps
Bitrate: 2557.745 kbps
Duration (bs): 01:30:35 (5434.846 s)
Qf: 0.116

[ Audio track ]

Codec: mp4a
Bitrate: 192 kbps
Bitstream type (bs): MPEG-1 Layer III
Frames (bs): 226,424
Duration (bs): 01:30:34 (5434.176 s)
Chunk-aligned (bs): Yes
Bitrate (bs): 192 kbps CBR
Sampling frequency (bs): 48000 Hz
Mode (bs): stereo
Padding (bs): No
Emphasis (bs): none

[ Video bitstream ]

Bitstream type: MPEG-4 Part 10
User data: x264 | core 130 r2273 b3065e6 | H.264/MPEG-4 AVC codec
User data: Copyleft 2003-2013 | http://www.videolan.org/x264.html | cabac=1
User data: ref=8 | deblock=1:-2:-2 | analyse=0x3:0x113 | me=umh | subme=9
User data: psy=1 | psy_rd=1.00:0.25 | mixed_ref=0 | me_range=48 | chroma_me=1
User data: trellis=1 | 8x8dct=1 | cqm=0 | deadzone=6,6 | fast_pskip=0
User data: chroma_qp_offset=-4 | threads=24 | lookahead_threads=2
User data: sliced_threads=0 | nr=0 | decimate=0 | interlaced=0
User data: bluray_compat=0 | constrained_intra=0 | bframes=4 | b_pyramid=2
User data: b_adapt=2 | b_bias=0 | direct=3 | weightb=1 | open_gop=0 | weightp=2
User data: keyint=240 | keyint_min=24 | scenecut=40 | intra_refresh=0
User data: rc_lookahead=10 | rc=2pass | mbtree=1 | bitrate=2560 | ratetol=1.0
User data: qcomp=0.00 | qpmin=0 | qpmax=69 | qpstep=4 | cplxblur=20.0
User data: qblur=0.5 | vbv_maxrate=20000 | vbv_bufsize=25000 | nal_hrd=none
User data: ip_ratio=1.10 | aq=1:1.00
SPS id: 0
Profile: High@L4
Num ref frames: 8
Aspect ratio: Square pixels
Chroma format: YUV 4:2:0
PPS id: 0 (SPS: 0)
Entropy coding type: CABAC
Weighted prediction: P slices - explicit weighted prediction
Weighted bipred idc: B slices - implicit weighted prediction
8x8dct: Yes
Total frames: 130,306
Drop/delay frames: 0
Corrupt frames: 0

P-slices: 34771 ( 26.684 %) #####
B-slices: 94292 ( 72.362 %) ##############
I-slices: 1243 ( 0.954 %)
SP-slices: 0 ( 0.000 %)
SI-slices: 0 ( 0.000 %)

[ DRF analysis ]

average DRF: 9.833
standard deviation: 2.565
max DRF: 13

DRF=1: 1416 ( 1.087 %)
DRF=2: 1200 ( 0.921 %)
DRF=3: 1581 ( 1.213 %)
DRF=4: 1513 ( 1.161 %)
DRF=5: 1573 ( 1.207 %)
DRF=6: 2874 ( 2.206 %)
DRF=7: 11205 ( 8.599 %) ##
DRF=8: 15297 ( 11.739 %) ##
DRF=9: 12709 ( 9.753 %) ##
DRF=10: 5694 ( 4.370 %) #
DRF=11: 26513 ( 20.347 %) ####
DRF=12: 48124 ( 36.932 %) #######
DRF=13: 28 ( 0.021 %)
DRF>13: 0 ( 0.000 %)

P-slices average DRF: 7.533
P-slices std. deviation: 2.792
P-slices max DRF: 12

B-slices average DRF: 10.729
B-slices std. deviation: 1.788
B-slices max DRF: 13

I-slices average DRF: 6.233
I-slices std. deviation: 2.685
I-slices max DRF: 12

[ Profile compliancy ]

Selected profile: MTK PAL 6000
Resolution: 1280 x 720 > 720 x 576
Framerate: 23.976 <> 25
Buffer underflow: 00:01:16 (frame 1815)
Buffer underflow: 00:01:16 (frame 1827)
Buffer underflow: 00:01:26 (frame 2069)
Buffer underflow: 00:01:28 (frame 2102)
Buffer underflow: 00:01:59 (frame 2856)
Buffer underflow: 00:02:00 (frame 2866)
Buffer underflow: 00:03:52 (frame 5574)
Buffer underflow: 00:03:53 (frame 5582)
Buffer underflow: 00:15:11 (frame 21832)
Buffer underflow: 00:15:14 (frame 21911)

This report was created by AVInaptic (25-07-2011) on 12-02-2017 16:29:38


SECONDO VIDEO

[ About file ]

Name: 2.avi
Date: Tue, 08 Nov 2016 11:00:13 +0100
Size: 1,842,993,152 bytes (1757.615 MiB)

[ Magic ]

Tipo file: RIFF (little-endian) data, AVI, 720 x 304, 23.98 fps, video: XviD, audio: Dolby AC3 (stereo, 48000 Hz)

[ Generic infos ]

Duration: 01:30:35 (5434.852 s)
Container: AVI OpenDML
AVI has index: Yes
Total tracks: 2
Track nr. 0: video
Track nr. 1: audio
ISFT: Nandub v1.0rc2
INAM: Io Sono Vendetta 2016
ISBJ: Io Sono Vendetta 2016
IART: MatrixCrew
ICOP: BRRip
ICMT: AC3
Junk: Nandub build 1853/release

[ Relevant data ]

Resolution: 720 x 304
Width: multiple of 16
Height: multiple of 16
Average DRF: 1.899
Standard deviation: 0.828
Std. dev. weighted mean: 0.8

[ Video track ]

FourCC: XVID/XVID
Resolution: 720 x 304
Frame aspect ratio: 45:19 = 2.368 (~2.35:1)
Pixel aspect ratio: 1:1 = 1
Display aspect ratio: 45:19 = 2.368 (~2.35:1)
Framerate: 23.976 fps
Total frames: 130,306
Stream size: 1,706,228,510 bytes (1627.186 MiB)
Bitrate: 2511.537 kbps
Qf: 0.479
Key frames: 1,340 (0; 34; 284; 534; 577; ... 130104)
Null frames: 0
Min key int: 1
Max key int: 250
Avg key int: 97.243
Delay: 0 ms

[ Audio track ]

Audio tag: 0x2000 (AC3)
Channels: 2
Chunks: 130,296
Stream size: 130,434,816 bytes (124.392 MiB)
Bitstream type (bs): AC3
Frames (bs): 169,837
Duration (bs): 01:30:35 (5434.784 s)
Chunk-aligned (bs): Yes
Bitrate (bs): 192 kbps CBR
Sampling frequency (bs): 48000 Hz
Mode (bs): stereo
Preload: 480 ms
Max A/V diff: 480 ms
Delay: 0 ms

[ Video bitstream ]

Bitstream type: MPEG-4 Part 2
User data: XviD0067
Packed bitstream: No
QPel: No
GMC: No
Interlaced: No
Aspect ratio: Square pixels
Quant type: H.263
Total frames: 130,306
Drop/delay frames: 0
Corrupt frames: 0

I-VOPs: 1340 ( 1.028 %)
P-VOPs: 65345 ( 50.147 %) ##########
B-VOPs: 63621 ( 48.824 %) ##########
S-VOPs: 0 ( 0.000 %)
N-VOPs: 0 ( 0.000 %)

Max consecutive B-VOPs: 1

[ DRF analysis ]

average DRF: 1.899
standard deviation: 0.828
max DRF: 14

DRF=1: 46639 ( 35.792 %) #######
DRF=2: 53879 ( 41.348 %) ########
DRF=3: 26866 ( 20.618 %) ####
DRF=4: 2540 ( 1.949 %)
DRF=5: 131 ( 0.101 %)
DRF=6: 192 ( 0.147 %)
DRF=7: 36 ( 0.028 %)
DRF=8: 4 ( 0.003 %)
DRF=9: 10 ( 0.008 %)
DRF>9: 9 ( 0.007 %)

I-VOPs average DRF: 1.148
I-VOPs std. deviation: 0.361
I-VOPs max DRF: 3

P-VOPs average DRF: 1.737
P-VOPs std. deviation: 0.714
P-VOPs max DRF: 9

B-VOPs average DRF: 2.082
B-VOPs std. deviation: 0.897
B-VOPs max DRF: 14

[ Profile compliancy ]

Selected profile: MTK PAL 6000
Resolution: Ok
Framerate: 23.976 <> 25
Min buffer fill: 50%

This report was created by AVInaptic (25-07-2011) on 12-02-2017 16:32:30

Dipende dove li devi vedere i video. Io preferisco gli Mp4 poi dipende dai codec. Io ho una videocamera in HD e li vedo in Mp4 codec H264, visione ottima anche su TV da 43 pollici FullHD.
Il primo è un po' meglio, Xvid è molto compresso e vederlo su uno shcermo un po' grande si vedrebbero dei difetti, diciamo che grandi differenze non ci sono.
Mentre su un ipod, tablet o pc con monitor piccoli non si noterebbero diferenze.

MP4 meglio degli XVID se sono filmati tratti da videocamera però potresti provare a convertirli in MKV anche questo è un buon codec.

Qui si spiega le differenze tra i vari codec.
http://www.navigaweb.net/2015/03/differenze-tra-formati-video-avi-mkv.html
Io(opinione personale)preferisco lo MKV anche perché è supportato da quasi tutti i lettori e TV ma anche il metodo da te segnalato può andare benissimo se il file è di buona qualità.