AVI ek container hai, aur woh bhi purana
AVI 1990s ki shuruaat ka hai, lagbhag har modern video codec se bhi pehle ka — yeh ek container format hai jo technically iske andar kai alag tarah ke video aur audio streams rakh sakta hai, yahi exact wajah hai ki AVI files practically inconsistent hoti hain: do AVI files ek hi file extension share karne ke bawajood bilkul alag internal codecs use kar sakti hain aur bahut alag behave kar sakti hain. Yeh inconsistency aisi AVI files ki main wajah hai jinhe "chalna chahiye" lekin nahi chalti, kyunki andar ka khaas codec combination aisa nahi jise aapka device ya software support karta ho.
MP4 dono hi mayno mein naya hai aur devices mein zyada stable tarike se implement hota hai, yahi wajah hai ki convert karna aisi compatibility problems solve karta hai jo basically AVI ke purane, alag-alag internals ke baare mein hain, na ki khaas file mein kisi galti ki wajah se.
AVI files aaj bhi kahan dikhti hain
Purane home videos, purane digital cameras aur camcorders ki footage, saalon se update na hue software ki archived recordings, aur aise sources se download content jisne kabhi apna format modernize nahi kiya — yeh sab mostly abhi bhi AVI ke taur par maujood hain. Agar aapko purani family video ka folder virasat mein mila hai ya saalon purani archived recordings khodi hain, toh achhi sambhavna hai ki kuch isi purane format mein hon.
AVI aksar sahi tarike se chalne par bhi andar purane, kam efficient codecs use karta hai, jiska matlab hai ki files barabar visual quality wali modern MP4 se kaafi badi hoti hain — convert karna aksar codec ko modernize karne ke side benefit ke taur par file ko kaafi chota kar deta hai.
Conversion se quality ke lihaz se kya expect karein
AVI ke purane codecs se MP4 ke modern H.264 mein convert karna genuine re-encode hai, aur AVI file ke asli codec aur quality ke hisaab se, result asal mein chote file size par barabar ya better dikh sakta hai, kyunki modern codecs har unit data mein visual quality bachane mein bas zyada efficient hain. Yeh size-for-quality trade-off ke lihaz se zyada favorable format conversions mein se ek hai, exactly isliye kyunki source format itna purana hai ki modern encoding ko better hone ke liye dashkon mile hain.
Bahut purani ya unusual AVI files par ek quick note
Kuch bahut purani ya unusually-encoded AVI files aise obscure codecs use karti hain jinhe padhne ka modern software mein limited ya bilkul koi support nahi hai, jo conversion attempt ko fail kar sakta hai ya corrupted output bana sakta hai — yeh rare hai lekin jaanna zaroori hai agar aapko aisi AVI file mile jo har conversion attempt ka resist karti lage. Us khaas situation mein, working conversion path dhundhne se pehle file ke andar ke codec ko identify karna pad sakta hai.